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As managers and mentors, we need to understand that our team members may need something very different from what we think or expect. Today's challenges demand utilities that can maximize the effectiveness of their Casinoer paa nettetal nwea student goal setting.
Yet there is growing awareness that our unconscious biases affect how we perceive, interact, and promote women and people of color. The bad news is we all carry biases, regardless of our gender or ethnicity. The good news is we can increase our awareness and decrease the impact of biases on the performance of our organizations. This presentation focuses on the Implicit Association Test IAT that Casinoer paa nettetal nwea student goal setting unconscious biases that people may be unwilling or unable to acknowledge.
Through a live simulation of the test with a neutral subject implicit association with flowers and pleasant wordsattendees will have the opportunity to experience how implicit bias works and follow up by evaluating their own gender and racial biases using the IAT.
This presentation also includes concrete steps attendees can take to reduce their biases. These steps include increasing our day to day interactions with people who differ from us, increasing our awareness to make the unconscious conscious, and reducing the opportunity for biases within our organizations. King County Wastewater Treatment Division: Building Our Future Through Training. Outlined is the innovative approach King County Wastewater Treatment Division is taking to address the Wastewater Treatment Plant Operator session planning issue of hiring experienced, trained and qualified wastewater treatment plant operators.
We are developing our own pool of trained, qualified operators. With equity and social justice values in mind, we set out to hire community members with little to no wastewater or industrial trade backgrounds to become employees in our Operators in Training Program. The process included outreach to our diverse community members which resulted in over two hundred and fifty applicants who were invited to take a written test.
The outcome of those processes lead to thirteen 13 community members participating in our two 2 year Operator in Training Program. Our program includes a six 6 week WTD Wastewater Boot Camp, and three 3 month rotation assignments at a variety of our treatment facilities. Our training program has produced employees who are a motivated and have created a very competitive workforce which will be utilized to bridge the hiring gap we are facing. They are energized and excited to protect public health and the environment.
This enthusiasm is contagious as existing staff see the fast moving path these new employee are moving on and they want on board. We are building our future through training.
A Changing of the Guard: This begs the question of who will fill the leadership roles left vacant by the in masse workforce departure. In this male dominated industry many women often struggle to break outside of preconceived professional gender roles to fulfill these leadership opportunities. A shift is needed to facilitate female professional growth within all areas of our industry.
That shift needs to happen now. Understanding that the leadership journey starts early is fundamental to fostering this ideal in the workforce — especially with females. It begins with reframing what it means to be a leader in both a global and local sense.
When does leadership actually begin? What does it mean to be an industry leader? How does the perception of leadership compare to reality? Can leadership exist outside of a management position? There are five commonly recognized tenants of leadership that can help answer these questions.
Arguably, men and women understand, embody, and manifest these principles in different ways. Generational and cultural differences also affect the cultivation and perception of leadership within a professional setting. Cultivating your personal leadership journey starts with the identification of your true self and finding your voice. This presentation will cover the five commonly recognized leadership tenants, application of these leadership principles in daily professional activities, and why taking on a leadership role or roles as a female in the water quality industry is more important than ever.
Leadership and diversity in moving from technical and programming oversight to leading WEF operations. Whether you have a formally defined program or not, at the end of the day, if you operate a utility, you are in the business of asset management.
You make decisions about your assets every day in order to best serve your customers as cost-effectively as possible. This presentation will describe how utilities can realize the benefits of formalizing their approach to asset management through a right-sized approach to planning and implementation.
It will provide examples of mid-size utilities that have successfully moved from assessing their existing programs and identifying opportunities for improvement, to acting on those opportunities and implementing solutions. The examples will include the topics of performance management, risk assessment, and asset inventory.
A brief overview of available planning and assessment tools will also be provided. Attendees can expect to gain the following knowledge: This integration presents an opportunity to move the water community to appropriately supported, defensible master planning WMP that includes a systematic, tiered condition assessment program.
Despite the relatively well understood advantages presented by condition assessment, the adoption of condition assessment has not advanced into a standard component of utility business practice.
Given the increased scrutiny on public decision making, potential decrease in state and federal funds for infrastructure, and the impact of aging infrastructure, appropriately sized and planned condition assessment presents an opportunity for significant savings to utilities.
This presentation will introduce a generalized model and tools developed by this WRF project to attendees so as to elaborate mechanisms that progress a utility along the "road map" as well as roadblocks that may prevent a utility from progressing and present through case studies of participating utilities the benefits of such an approach.
This presentation will educate and familiarize participants with tools and knowledge to uncover asset and condition information within in its own data first, Casinoer paa nettetal nwea student goal setting then assist in determining economically viable condition assessment technological elements appropriate to their situation in combination with ongoing master planning efforts.
In recent years, the topics of resiliency and risk related to infrastructure planning, design, and post-disaster recovery have been at the forefront of many utility district and city agendas. An infrastructure resiliency planning process includes a collaborative effort among community leaders, stakeholders, and utility owners to establish goals, evaluate scenarios, identify solutions, and implement a critical path forward to implementation.
One of the most challenging aspects of the plan development is to understand and evaluate interdependent factors including type of disaster, location of disaster, type s of infrastructure impacts, and overlap of infrastructure or utilities. An additional challenge is to prioritize action and represent the implementation order in a clear manner that will allow communities to react effectively.
This presentation focuses on a Partition or Decision Tree Modeling approach to resiliency plan development and documentation. Recursive partitioning is a statistical methodology that tracks relationships between multiple variables through a series of branches to identify trends and patterns. In resiliency planning, the partition model can correlate risk of any variable x, such as population impacted relative to any other variable or sub-variable y, such as disaster location, infrastructure pipeline breaks, flooding risk, environmental protection, transportation impacts, etc.
The model is populated by GIS, hydraulic modeling data, service databases, weather statistics, etc. The model traces a series of tree branches and leaves to show the unique relationship or correlation between the multiple inputs. The output is used to evaluate scenarios, establish trends, and select the highest priority actions for a number of emergency conditions. The trees can also be used to document multiple action plans dependent on the emergency condition.
This presentation will focus on several simple examples of regional utilities Casino tilbudsavis lidl supermarket introduce the model approach. Over the last year, the WIFIA program has marked several major milestones, launching it into the government lending space: EPA published two rulemakings about the program, received an appropriation and announced that it No deposit bonus casinos usa players accepting interest for its first round of loans, and selected projects that will be invited to submit applications.
This session on WIFIA will update audience members on program background as well as recent developments, including discussing projects invited to apply and offering tips for submission in response to the next notice of funding availability. In addition, the benefits of WIFIA credit assistance will be explored in greater detail and programmatic trends and policy will be discussed to help prospective borrowers decide whether seeking WIFIA is right for their project.
Many communities are facing the need to address regulatory requirements that relate to stormwater and floodplain management. In many ways, the actions that affect stormwater and floodplain dynamics are the same, but they are governed by two very different regulatory programs.
Willamette Partnership and the Oregon Association of Clean Water Agencies are partnering to make it cheaper and easier for communities to develop integrated planning and restoration work that will ultimately reduce costs associated with stormwater and floodplain compliance and build resiliency in local waterways.
These partners recently convened a workshop focused on: This presentation will summarize the key take aways from this gathering and the associated workshop report. As we witness interesting weather events and the many stressors of urban development, green infrastructure appears to be a viable option for many utilities. However this approach will fail if we are unable to bring to scale the actions needed for a resilient and healthy watershed. Moving from pilot projects to a landscape scale conservation program restoring more than 10 river miles annually was a ten year journey for Clean Water Services and the partners of the Tualatin River Watershed.
This program was catalyzed by an innovative regulatory framework and the restoration technology needed to restore watershed health at the landscape scale.
Moving from the planting of a few thousands native plants to more than 2 million annually across broad riparian and upland landscapes was enabled by the development of innovative restoration tools that reduced costs and nourished this multimillion dollar landscape conservation program. In addition, community social networks play a key role in the planning, implementation and long term stewardship of this program.
This presentation will highlight a decade of lessons learned and the innovative tools and social networks created to sustain a landscape conservation program able to restore plus river miles across more than 25, acres in the Tualatin River Watershed. Green stormwater infrastructure has become an accepted practice in the Pacific Northwest for both stormwater management and combined sewer overflow reduction.
Projects in the region have shown green infrastructure to be a cost-effective strategy when conditions are ideal. However, innovations are needed for areas with marginal soils, dense urban environments, and basins where nutrient export is a concern. This presentation will summarize some of the adaptations to the suite of standard green infrastructure practices that have been implemented recently to achieve performance in these challenging environments.
A common challenge in the Pacific Northwest is poorly infiltrating surficial surface soils. To address this, many jurisdictions have been exploring deep infiltration UICs as a means to access greater infiltration capacity in deeper soil receptors.
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In some locations, neither shallow nor deep infiltration is feasible. In some basins, the use of underdrains is not prudent given the potential for nutrient export. The Department of Ecology is funding research to develop a bioretention soil mix suitable for these basins.
In the meantime, the Delridge project evaluated approaches to mitigate nutrient export from the standard soil mix. Project cost is another challenge to implementing green infrastructure at scales large enough to produce a positive impact on Puget Sound.
To improve cost-effectiveness, designers have explored two key adaptations to the traditional GSI implementation approach: Seattle Public Utilities is implementing a multi-basin partnering program to leverage cost-sharing with other agencies, reduce public engagement efforts and maximize benefits per dollar spent. Looking to empower constituents in your watershed to transform over-paved places into community greenspaces?
Depave will share their approach to citizen-driven greenspaces that transform watersheds, build community, and foster stewardship through specific examples from their extensive greenspace portfolio. Various methods have been employed to ensure sufficient VFAs are available to the phosphorus accumulating organisms PAOs.
Primary solids fermentation is a common unit process employed; alternately, carbohydrate-rich industrial wastewater can be fermented to produce excess VFAs. However, limited research has been conducted to vet this alternative fermentation method, and little is known about the potential effect on EBPR.
In this study, research was conducted to investigate RAS fermentation potential, and the potential effect on the EBPR microbial ecology. Subsequently, bench-scale sequencing batch reactors fed real wastewater and performing EBPR, with an integrated RAS fermentation stage, were operated for an extended period; comprehensive process performance was monitored VFAs; nutrients; intracellular carbon storage polymersincluding PAO quantitation.
Results provide important and useful process information for engineers considering implementation of RAS fermentation, and for operations staff associated with process operations and monitoring. This presentation will include a comprehensive review and discussion of data obtained from this study.
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The objective of the ongoing operational research is to evaluate and compare the performance among different EBPR configurations and reveal the underlying mechanisms via microbial population analysis, with the aim to learn which configurations and associated microbial community structure and phenotypes are most successful, and the principal factors that influence their success and failure. Doug Welch 1H.
Results from this study, which included information on other MBR facilities, identified a number of potential contributing causes. A more rigorous study was planned based on the hypothesis that the fouling was due to the collection of fines, small floc and filamentous bacteria in a biopolymer gel layer formed on the membrane surface between relaxation periods, which is encouraged by soluble microbial products and extracellular polymeric substances in the centrate return stream.
However, before beginning this study, an incident removed the primary sludge gravity thickener from service for an extended period, significantly increasing the organic load to the secondary process. The first generation of membrane bioreactors MBRs in the Pacific Northwest commenced operation fifteen years ago. This new technology represented a considerable advancement over conventional wastewater treatment, particularly the ability to produce high-quality reclaimed water within a small physical footprint.
Also, manufacturers are continuing to refine membrane technology and develop new products. Currently, a number of the original membrane plants are being evaluated and modified to enhance operability and performance.
This presentation focuses on the experience gained in evaluating these facilities, and in developing improved operational procedures as well as construction retrofits.
A crucial aspect is designing facilities to accommodate local conditions. The first MBRs in the United States were constructed in the southeast, with warm wastewater temperatures. As a consequence, new facilities were designed assuming high membrane flux rates the ability to pass flow.
However, cold wastewater temperatures experienced in the Pacific Northwest require specific design and operational approaches for reliable performance.
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First, cold temperatures impair membrane permeability and diminish flow. Second, cold weather biological growth varies from warm water organisms. This can result in the growth of filamentous organisms in cold wastewater. Stressed organisms may also produce extracellular polymers that interfere with membrane filtration. The presentation concludes with information on proposed modifications to improve membrane performance.
The gradual shift from mere cleaning and disposal to environmental stewardship, low level nutrient removal, energy neutrality and resource recovery is moving the focal point of treatment plant design and operation to the solids side, dewatering, and disposal. Permit compliance remains the primary driver that sets the level of treatment. Liquid treatment changes, especially towards meeting lower nutrient standards impact solids processing directly and indirectly.
Dewaterability declines, polymer cost increase, scaling and grit problems can occur as a result of enhanced biological phosphorus removal EBPRincrease phosphorus content in sludge that can limit land application and similarly wetter cake will have a higher nitrogen load with the same potential limitation. The same is true in reverse. Nutrient removal processes are sensitive to recycle loads and processes like thermo hydrolysis increase those loads and add significant non-biodegradable phosphorus, nitrogen, and COD.
Codigestion of organic waste impacts dewaterability, the quality and amount of biosolids generated, and the recycle load.
THP and codigestion can increase centrate ammonia concentrations to levels where ammonia recovery is practical. In this new world were often competing treatment objectives and highly interrelated treatment plant processes create a circular argument like problem it is prudent to carefully review how each unit process change will impact the rest of the plant. The general trend towards energy neutrality and resource recovery increases the scope and complexity of the solids treatment and its impact on the liquid treatment and permit compliance.
Solids treatment no longer is Casino uden dansk licensure by endorsement massachusetts marijuana necessary byproduct of sewage treatment but rather becoming the center of the plant operation both with regard to permit compliance as well as overall operation and capital cost.
The Dalles, Oregon City wastewater treatment facility processes wastewater through a conventional activated sludge system without primary clarification. To process biosolids, the plant uses anaerobic digesters to generate Class B biosolids. During the planning stage of the project, Carbon Diversion was selected as a promising option to defer costly expansion of the secondary process basins, pending the results of a pilot study to verify the approach.
With recent improvements in filtration technology and an Casinoer paa nettetal nwea student goal setting industry driven towards resource recovery, the wastewater industry is exploring filtration of screened influent wastewater as means for diverting a significant portion of the carbon load suspended organics directly to the anaerobic digesters.
Reduced organic loading to Casinoer paa nettetal nwea student goal setting secondary process resulting in reduced air demands, increased energy savings, and deferment of secondary process expansion. Increased carbon loading to the anaerobic digester resulting in increased methane gas production and improved economics for potential energy recovery projects, such as combined heat and power cogeneration facilities.
This presentation will outline the results obtained from pilot testing three leading manufacturers of Carbon Diversion technology at The Dalles Wastewater Treatment Plant in When the City of Bozeman upgraded their Water Reclamation Facility WRF to treat phosphorus and nitrogen biologically, they recognized they would have to deal with the recycle biosolids stream containing phosphorus.
Magnesium Ammonium Phosphate MAPor struvite, forms in biological nutrient reduction BNR facilities and can be a nuisance, but the City of Bozeman decided to encourage the formation of struvite in their anaerobic digestion and use it as a method to bind phosphorus in the biosolids reuse product and reduce the amount returned to the recycle stream.
The BNR project included a new screw press for dewatering of their waste biosolids, as well as a new anaerobic digester. The City began dosing magnesium hydroxide Mg OH 2 to the digester to encourage the struvite formation within the digestion process and to control the pH of the digester contents. Additionally, the City provided the ability to dose to the solids directed to dewatering in the screw press.
While magnesium hydroxide is troublesome to store and use, many benefits have been realized:. The reduction in load helps the WRF to maintain their excellent phosphorus removal and discharge water in the range of 0. Lessons learned on the handling of Mg OH 2 for metals salt addition to the process will also be presented.
The two types of dryers are conduction indirect and convection direct dryers with some technologies combining the two types of heat transfer. Dryers are used to evaporate water from the biosolids to produce an end product that is at least 90 percent solids by weight. Conduction dryers transfer heat from a heat transfer medium through a conductive material directly in contact with the biosolids.
The primary conduction dryer technologies include paddle, hollow-flight, and rotary chamber dryers. Convection dryers transfer heat from heated air directly to the biosolids.
The primary convection dryer technologies include rotary drum dryers, fluidized bed dryers, and belt dryers.
A burner is used to heat air which then heats the biosolids and evaporates the water as the Biosolids move from the inlet to the outlet of the system. In this presentation, a description of several biosolids drying systems used in Washington State is presented. Factors affecting regulatory compliance, operational efficiency, safety, and reuse of the dried biosolids are noted.
In addition, process fundamentals, required ancillary equipment, energy use, historical trends, current practices, and site design considerations for future innovations or expansion are described. Where have all the projects gone? Extending the life of aging infrastructure has shifted the City of Mercer Island, WA City from large capital projects to smaller rehabilitation projects implemented over time. City provides wastewater Casinoer paa nettetal nwea student goal setting to approximately 23, people in King County, WA.
The City's sewer system, which is built-out, was constructed between the s through early s. In recent years, the City has focused on smaller rehabilitation projects, such as generator replacement. These smaller projects can be easily delayed as City Staff or funding are "reshuffled" to new priorities. By designating annual programs as part of the Capital Improvement Program CIPthe City has been able to steadily and efficiently implement projects, while building on lessons learned to reduce costs.
This presentation will discuss how to use a programmatic approach to systematically extend the useful life of existing infrastructure with limited funds. The City has historically relied on annual programs to meet specific goals, such as to replace "backyard mains" and modernize its SCADA system.
As part of its General Sewer Plan update, the City identified a need to expand its annual programs to effectively operate and maintain its aging collection system, pump stations, and Lakeline over the next 20 years. The City and its Consultant will use both the City's historical and new annual programs to provide examples and lessons learned that are applicable to engineers, system operators, and utility managers. Tackling the problem of how best to fix old, deteriorating, critical trunk sewers can be daunting.
Routine activities for small diameter projects, such as flow bypassing or simply accessing the line, can be risky and expensive for large lines. Challenges in Portland include alignments under buildings and freeways and through busy corridors, as well as in remote, sensitive areas.
Steep slopes and seismically unstable soils, deep profiles, brick and non-circular concrete materials, and capacity-limited segments add further difficulty. Many lines are structurally compromised by erosion, corrosion, and excessive loading. Initial focus was on determining priority lines and on whether full structural rehabilitation or stabilization provides the best value. Risk assessments and cost-benefit analyses were used to rank each reach.
Alternatives appropriate for specific site conditions were then evaluated and selected capitalizing on the collective team experience. City engineering, asset management, maintenance, and construction staff actively participated. Spiral pipe renewal, sliplining, cured-in-place pipe, stabilization grouting, spot repairs and other rehabilitation methods were evaluated.
Contractor input was incorporated. The result is a shortlist of prioritized, costed, and Casinoer paa nettetal nwea student goal setting solutions that can advance into final design without looking backward. Guidance covers alternative selection, design criteria, and final design considerations. It is tailored on condition, location, and many other specific parameters and constraints. The information is structured in a repeatable framework that can be updated as needed. This standardized approach will be invaluable for this long-term program and may help other agencies as well.
Instead of reinventing the wheel for each project, this substantial knowledge base will be accessible to current and future team members. It guides timely, sound decisions and supports efficiencies in project delivery and capital program accomplishment.
Cured-in-place pipe CIPP has been a rehabilitation technology that has had proven success in North America for almost 50 years. Traditionally, CIPP has relied on the use of hot water or steam to initiate the process of hardening the chemical resins.
Many improvements have been made over the years, including a wider range of resins to suit various applications, faster installations, and more tools that ensure a higher level of quality during the construction. However, the last couple of decades has seen a dramatic shift in European markets where CIPP was first developed. UV-CIPP offers a number of benefits, including longer storage times, thinner liners, real-time visual and temperature monitoring during installation, smaller construction footprint, etc.
Groundwater impacts on sewer relocation using trenchless technologies near and under I in Renton, Washington. The greater Seattle area is one of the fastest growing regions in the US.
With the growth of surrounding suburban communities, the Washington State Department of Transportation WSDOT must continuously work to maintain the level of service for the freeway system connecting the local communities. To accomplish this, WSDOT needs to relocate the remaining freeway travel lanes further to the Casino siderosis symptoms of appendicitis to accommodate the new bridges and transitions.
Moving the freeway lanes further south required the relocation of existing utilities within Talbot Hill including existing City of Renton 8-inch and inch diameter gravity sewer lines in South 14th Street and under I at Shattuck Avenue S. Relocation of the existing gravity sewer lines for the City of Renton required the use of multiple construction techniques including both conventional open cut and trenchless technologies due to depths up to 50 feet deep required for the new gravity sewers.
Geotechnical explorations in the project area identified soils consisting of silty-sand overlaying weathered sandstone bedrock with groundwater ranging from 10 to 35 feet below the ground surface. Both the geologic formations and the presence of groundwater impacted the construction of the new gravity sewer lines. This presentation will include 1 the alternative construction methods analyzed that would allow for the line and grade installation of gravity sewer, 2 the design considerations used to achieve the depths and slopes required for the gravity installation along with the soil and groundwater conditions encountered, and 3 examine the effects of the localized groundwater on the installation of the newly relocated gravity sewer mains within Talbot Hill using both horizontal directional drilling HDD and guided-auger bore technology.
Having diverse teams is important to all organizations. A diversity of backgrounds, perspectives, beliefs, and experiences helps to challenge traditional thinking and bring creative, innovative solutions to complex problems.
Fostering a diverse culture requires modeling and leadership at the top levels of the organization, as well Casinoer paa nettetal nwea student goal setting a focus on inclusion throughout all levels of the organization. High tech can bring people together! Electronic polling creates an inclusive environment for large and small public meetings, citizen advisory groups and other gatherings.
The tool engages the audience and allows the facilitator to connect with every member of the audience and identify their understanding and priorities. The results are instantaneous—and shared with everyone in the room. Participants know their feelings have been shared and understand how their views compare to other participants. And it is fun to vote! Over the last decade, Libby Barg has developed methods for using electronic polling to fully engage audiences of all sizes — from 10 to — in important community choices.
She also uses this high tech tool to efficiently work with advisory groups moving through complicated technical issues and decisions. As part of the Women in Leadership session, Libby will introduce electronic polling to demonstrate its power to create an inclusive environment and share advice on how others can use this technology to improve decision making.
Opportunities for Leadership and Strategies for Building Diversity. A diverse panel of active, local leaders with over years of combined Play free casino games slots no downloads in water issues will share insight and experience from their careers.
The panel will discuss the leadership successes and challenges they have faced in their career. They will also discuss the barriers encountered in our industry for women and minorities and strategies to mitigate or remove them. Finally, the panel will answer questions on how leadership can influence diversity and how culture helps create opportunities for workplace diversity.
Can you please share an example of a time you observed a leader influencing diversity? Planning for the future is challenging. Utilities are faced with aging infrastructure, budget constraints, extreme weather conditions, stricter regulations, technological advances, and other issues. Smart Utility—a new approach to utility management—pulls data across systems and departments operations, management, information systems, engineering, and water quality into one location and transforms it into valuable information to make planning and decision making easier.
Smart Utility provides utilities with the information they need to develop priorities; plan for the right projects; and ultimately adapt to environmental, technical, and financial changes.
As demand increases, costs decline, and technology improves, Smart Utility is gaining momentum because of its ability to reduce operating costs, increase efficiency, and justify Casinoer paa nettetal nwea student goal setting decisions. Increasingly, municipalities are leveraging Smart Utility to address critical issues like limited water resources, growing populations, and aging infrastructure.
Smart Utility allows utilities to exchange data in real time and secure the needed architecture to access answers from any device, phone, tablet, or personal computer and at any location. The Smart Utility has a number of benefits including operational cost savings, improved customer service, water conservation, and faster response times.
Advancements in IT and OT are now making it possible to equip staff with the knowledge they need to proactively make decisions, reduce the risk of equipment failure, and optimize performance. This presentation will focus on two fast-growing and emerging technologies: The relative strengths and weaknesses of each will be compared in terms of:.
This presentation will explore options for improving the security and reliability of these technologies, and identify criteria that can be used to determine if the risks of using these technologies can be mitigated to acceptable levels for a given organization. Looking to the future: Clark Regional Wastewater District is located in southwest Washington State and manages a wastewater collection and conveyance system that serves approximatelypeople.
The District has been providing wastewater collection services for over 50 years to the unincorporated urban areas of Clark County, which is situated immediately north of the city of The green valley casino henderson nv hotels. The District has made several investments in key technology over time including a robust maintenance management system, GIS system with a complete inventory of the District assets, computer server and related investments, and mobile devices.
These investments position the District to further leverage technology and optimize key processes. In the District completed an Engineering Department Workflow Assessment to document and review key processes and work flows. This process identified specific opportunities for both process improvements and for investment in new technologies that demonstrate a clear return on investment. This presentation will explain why the District chose to undertake this process improvement, how they defined, mapped and assessed the key work flows, and enhanced them with available technologies.
It will also provide examples of the innovative improvements made, and planned, in the District as a result. The incinerator uses a Venturi scrubber and a tray scrubber, and mist eliminator following combustion for emission control. The most recent stack tests at Anacortes WWTP indicated sulfur dioxide and mercury may exceed the limits. The new wet scrubber will improve sulfur dioxide removal and the mercury removal modules will improve mercury removal.
The design was completed in December The new scrubber was started up in February It received the approval in August which made the Anacortes WWTP the first one in the nation to receive the approval under the new Federal Regulation. Construction and startup testing was planned and conducted in phases over a period of 7 days to minimize impact to WWTP operations. This presentation will discuss the features of the VenturiPak wet scrubber, why this treatment process was selected, the process of petition with USEPA, and the lessons learned during the design, construction, and startup.
The Biotic Ligand Model: The Biotic Ligand Model BLM is a new and innovative approach to determine aquatic life toxicity criteria for certain metals such as copper. The BLM accounts for multiple factors that affect bioavailability and toxicity of these metals, including dissolved organic carbon DOCpH, temperature, alkalinity and common wastewater receiving water constituents such as sodium, Casinoer paa nettetal nwea student goal setting, calcium, potassium, sulfate, and chloride.
The BLM is generally considered more scientifically defensible than previous or existing criteria for these metals that are based on hardness alone. In fact, here in the Pacific Northwest, the federal fisheries agencies have issued biological opinions, pursuant to the Endangered Species Act, that Oregon and Idaho must adopt the BLM for copper in order to better protect sensitive salmonid species. Depending on the site-specific chemistries, the BLM-based criteria can be more or less restrictive than hardness-based criteria.
The implications for municipal discharges in the region are tied to how the criteria will be implemented, not only the inputs to the model to calculate criteria, but also Casino for sjovt musikebi kartuli those criteria are then used to derive the water quality based effluent limits WQBELs for discharge permits.
This presentation will evaluate and summarize various alternative implementation approaches for criteria and WQBELs using three years of intensive BLM-specific data collected by the City of Boise for three locations on the Boise River: This is the most comprehensive BLM dataset in the PNW and provides a range of seasonal flow and chemistry conditions that can be analyzed for the Boise WRFs and other hypothetical dischargers that may have different mixing zone and dilution considerations for their facilities.
Probabilistic approaches such as the Fixed Benchmark Monitoring FBM and a range of more traditional percentile values will be evaluated on a seasonal and annual basis.
Water temperature has a significant effect on the health and viability of many of the native aquatic species in the PNW, especially salmonids.
However, the temperature regulations created to protect these species are complex, spatially and temporally variable, have been adjusted several times over the past several decades, have been subject to a series of lawsuits, and have been used to create TMDLs which have now been invalidated. This has created an atmosphere of confusion and uncertainty for wastewater utilities and other NPDES permit holders affected by temperature regulations.
The complexity and uncertainty regarding temperature regulations coupled with the differences between temperature and other water quality parameters can make complying with temperature regulations very difficult for regulated entities, especially smaller wastewater utilities. In order to help address this, the Oregon Association of Clean Water Agencies ORACWA has developed a guidance manual to help wastewater utilities, especially in small communities, to determine what the applicable temperature regulations are that apply to Mobile casino, determine the NPDES permit limits required in Casinoer paa nettetal nwea student goal setting to meet those temperature regulations, collect and analyze data to aid in the analyses, evaluate a suite of compliance strategies and management practices, and select a compliance strategy that best fits the need of that utility.
The newly updated guidance manual is designed to walk wastewater utility managers and decision makers through this process in a clear and concise manner. This talk will briefly review recent developments in temperature regulations and available management strategies for temperature, discuss the content and format of the temperature guidance manual, especially the recent changes made inand discuss how it can be used by wastewater utilities. Industry standard design criteria are established based on industry experience for designing systems robust enough to accommodate future variability and uncertainty in operating conditions.
However, these criteria are developed to be generally applicable and may not be appropriate for each specific treatment system. Before selecting design criteria driving major infrastructure decisions, it is important that designers and facility owners critically evaluate if the criteria being applied are appropriate and consistent with historically observed process performance.
This presentation will illustrate the approach Clean Water Services has taken to critically evaluate design criteria using for planning and design.
Four case studies will be presented from ongoing projects at the Durham Advanced Wastewater Treatment Facility. The presentation will also gather lessons learned. Dictates the shape of the solids flux curve and describe the settleability of secondary sludge. Central to setting the capacity of secondary clarifiers for solids removal and driver for aeration basin sizing.
Used in the design of the secondary expansion project. Capacity of existing fermentation system. Size of fermenters in capacity expansion. Tertiary clarifier surface overflow rate SOR and flocculation time. In order to meet the permit required low phosphorus concentrations, flocculation time must be long enough to coagulate particles effectively and the SOR must be low enough to ensure well clarified effluent.
Capacity of existing tertiary clarifiers. Sizing of flocculation zones for tertiary treatment expansion. All stakeholders realized a fairly novel outcome — they all achieved their objectives. The "integrated design to purpose approach" fostered an effective stakeholder working relationship and an operator friendly, flexible design that accommodates existing and future conditions by being able to be operated in different modes described in this paper.
Relative to conventional high-rate digestion the two-phase process provides 1 higher organic stabilization, 2 greater gasification rates, 3 higher net energy production, and 4 greater pathogen kills. Acid phase is a sludge pretreatment process where the solids retention time SRT is typically between 1 and 3 days balanced with volatile solids VS loading rates between 1. The function of the acid phase process is to provide hydrolysis and acidification pretreatment of the sludge, which is then more efficiently digested or stabilized within the subsequent mesophilic gas phase digesters.
This is achieved through floc disintegration and cell lysis releasing the organic material in the cells for consumption in the digestion process.
The new MBR facility includes flow equalization, 2-mm fine screening, a 3-stage bioreactor process, and hollow fiber membrane filtration. The facility was started up in and has been producing a high quality effluent that will contribute significantly to improving the health of Silver Bow Creek. The first section of the presentation will briefly recap the design criteria, describe the facility layout, and summarize process configurations.
The second part will address key startup issues and examine the performance of the new facility since its completion. Points of special interest are commissioning of multiple complex processes at one time; establishment of a nitrified sludge for adequate permeability; and switchover from the existing secondary treatment process.
The final segment of the presentation will examine an ongoing process optimization study and results to date. Wastewater treatment is an energy intensive business, with the highest operating cost after labor and chemicals being electrical energy consumption. Clean Water Services created an energy program with a strong emphasis on capital improvements and participation from engineering and supervisory level staff.
These efforts allowed CWS to maintain a flat energy cost over the past 6 years. Energy teams were formed by staff in operations, maintenance, electrical and instrumentation. These individuals are encouraged and empowered to generate ideas, implement changes, and be a conduit to their peers. This event demonstrated how operation and maintenance of equipment impacts site energy use and identification of energy saving opportunities.
Staff walked the facility with Energy Trust experts to identify potential energy improvements. This included installation of equipment timers, lighting upgrades, air leaking, and process optimization. A case study of lighting improvements at our Durham facility will be presented. Lighting was a method to engage staff in energy efficiency with something that was tangible and impacted their daily interactions at work.
Primary treatment using filtration has proven to be a reliable and energy efficient method that can be used to achieve significant capital and energy savings at waste water treatment plants WWTP. The primary treatment filtration technologies include primary effluent filtration PEF and primary filtration PF. The PEF demonstration project conducted for the California Energy Commission for two years Olivehurst, CA was the major milestone for the development and implementation of this emerging technology.
The PF technology has been tested over the last three years at several wastewater treatment plants including: In PF, primary clarifiers are replaced by primary filters before the secondary treatment process.
In addition to the three main benefits listed above, PF would also provide significant footprint savings by reducing the required primary treatment area by approximately 80 percent. This presentation will provide an overview of the PF technologies with a discussion of the following design, operational, and economical data obtained from several demonstration and pilot projects: This full scale installation was designed to demonstrate the energy savings and secondary treatment capacity increase in addition to improve the overall performance of the Linda County tertiary level WWTP.
The system is scheduled to be operational by May and will be included in the presentation. Clean Water Services has an ongoing effort to optimize energy efficiency across the district.
Sincethree major projects for energy efficiency upgrades have been completed to improve the aeration system at Durham. The success of each project hinged on reprogramming of the aeration control system. This presentation will summarize the challenges and lessons learned through our optimization efforts. The Durham aeration system consists of 6 blowers that deliver air to 28 controlled aeration zones across four Film casino terbaik bioreactors.
Prior tothe 6 blowers were all inlet Casinoer paa nettetal nwea student goal setting centrifugal blowers. Dissolved oxygen DO control at each aerated zone was achieved by directly adjusting a control valve in response DO measurements. The following upgrades have been completed through the energy efficiency projects:. Installed a variable frequency drive on one centrifugal blower to replace inlet throttling control. Replaced diffuser grids in four aeration zones to increase the number of diffusers.
In conjunction with these physical upgrades, the following major programming changes have been made:. Blower control strategy modified to maximize the use of the Turbo blower and the VFD-driven centrifugal blower. Most open valve control implemented to modulate the header pressure set point based on air demand.
These physical and control improvements have generated significant energy saving and enhanced the stability of the DO control system. However, throughout the optimization effort, troubleshooting was often necessary to understand the inter-relationship between physical infrastructure and control strategies. This troubleshooting has highlighted the critically of DO probe maintenance, identified several mal-performing aeration control valves and lead to the diffuser upgrades project.
This presentation will summarize lessons learned from the perspective of both the engineer and the programmer. With 23 member municipalities, Greater Vancouver in British Columbia, Canada, has a population of approximately 2.
To service this population, Metro Vancouver MV, the regional utility providercurrently operates five wastewater treatment plants in the area. Consequently, the existing effluent outfall will also require a hydraulic upgrade to meet this and future flow demands. The requirements of this project are to ensure reliable effluent discharge dilution in the Fraser River under various conditions by Casinoer paa nettetal nwea student goal setting, while implementing a system that can survive a seismic event in liquefiable soils with a return period of 2, years.
Project challenges include very little De bedste casino sideroblast meanings driving head; effluent dilution requirements; multiple regulatory and permitting requirements; site restrictions; highly liquefiable soils; and post-disaster bypass requirements.
Consequently, this on-going project consists of a The design is a gravity fed system utilizing minimal available hydraulic gradient to discharge the effluent, and achieve adequate dilution to mitigate negative environmental impacts around the receiving environment.
In this presentation, CDM Smith will discuss the approach used to meet the challenges of this project as it continues through design. Built in ahead of the treatment plant and conveyance completion, the outfall was activated in Looking to HDPE pipe as an outfall material for future projects, WTD wanted to explore the long term effects of the marine environment on the pipe properties and the environmental impact of the pipeline on the habitat.
To do this, WTD has visually inspected all or portions of the outfall pipelines annually. In four sets of HDPE samples in aluminum racks 40 samples in all, each measuring about 2 square feet were placed for future retrieval, examination and testing.
Three sets were placed adjacent to the pipelines at depths of feet, feet and feet mean lower low water MLLWthe last set at the foot long diffuser. A fourth set of samples was placed along the foot MLLW contour approximately feet south of the diffuser as a control.
The program is to retrieve three samples from each rack at year 2 and 5, and the remaining four samples and the rack at year The samples will be analyzed by marine biologists to determine what vegetation and marine life take up residence on the pipe and assess abundance, diversity and change over time.
After removal of the biological material, the samples are shipped to the pipe factory for physical testing. Visual observations from videos from the remote operated vehicle ROV inspections allow the marine biologists to assess other more mobile marine life that use the pipelines for habitat.
This presentation will discuss the results of the 2 year marine biology assessment as well as video observations, physical characteristics testing, and the initial observations from the sample retrieval. While serving a major portion of the City for nearly 80 years, the inch concrete sewer had one major flaw: In fact, the foot long steel drop shaft used to control up to 3. During a comprehensive master planning effort, the City identified this two-story elevation drop manhole as one of its highest priority projects to minimize risk and consequence of failure.
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NEW: Goal Setting PowerPoint (coming soon). When administering the MAP assessment, record student overall scores as well as goal area scores when they appear onscreen at the end of the test. Students will readily recognize areas of strength and areas of challenge. Working to improve the challenge area with the .:(You can view the ladder without student names here: Learning Ladder for MAPs ). top. Using Reports from NWEA. To determine appropriate classroom goals, download your Class Report from NWEA. Visit the NWEA Login Site. Type in the login name and password you received by email. (For a copy of your login and. When administering the MAPs assessment, record your students' overall scores as well as their goal area scores as they appear onscreen at the end of the test. Students will reflect on the results and write plans to improve in their lowest goal area in each subject. Improving in their lowest goal area will produce academic. hacer azucar flor port iceland house interior elecsys director z4m gta 5 emulator xbox download dj cleber mix musicas para baixar informes games chemistry pcr books on setting goals building materials calculator pdf to word mount and blade multiplayer lan pc babooshka paroles traduction upside.
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