This presentation emphasizes on the importance of maximizing recovery at MF/UF systems. Several cases are presented and suggestions such as using more efficient backwashing (by using less water each time and backwashing less frequently) are elaborated. Benefits of using less water and creating less wasted water are explained in detail....

This presentation describes the various aspects of the Coquina Coast desalination project that was considered for Northeast Florida...

This presentation Provides an overview of NF/RO and helps with an understanding of their application concepts. It provides logical selection process by answering the fundamental questions about when NF/RO can, should and must be used. It also helps with identification of critical issues (e.g., cost, fouling, residuals, risks and regulations) for...

Ten SWRO facilities in seven countries were interviewed in on a number of topics covering conveyance, hydraulics, integration, blending strategies, water quality goals, post-treatment, corrosion control and lessons learned. The most significant findings were strategies for controlling bromide to minimize chloramine residual decay, the advantage...

This paper provides an overview of the approach and focused deliberation which resulted in the selection of a treatment process that moved beyond regulatory requirements to meet consumer expectations for the City of Rifle, CO. The application of RO for treating fresh surface water is relatively uncommon but are likely to increase as utilities use ...

This presentation will provide attendees with an appreciation of how operational challenges can not only be addressed but overall operations optimized through focused forensic and collaborative efforts. The findings will give water plant superintendents and operators an appreciation of methods for enhanced overall plant operations, and prepare and ...

The purpose of this paper is to compare concentrate management strategies for recycled wastewater, highly brackish groundwater, seawater, and saline surface water. Discussed is a process for generating calcium carbonate by combining carbon dioxide emissions from power plants with seawater to mitigate global warming, and to recycle the calcium carb...

This paper presents findings from the City of Gallup's pilot testing for a surface water microfiltration project from the San Juan River. At a cost of nearly $1 billion, this is a major effort being managed by the Bureau of Reclamation. This paper presents the details of the 2012 six month pilot water treatment project and treatment plant process s...

This paper and associated presentation explores these areas of regulatory discretion under the Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) membrane regulatory framework, discussing the impact of different approaches both qualitatively (i.e., from a policy perspective) and quantitatively (i.e., using a sensitivity analysis applied t...

The paper and presentation is of interest to utilities that are challenged by total organic carbon (TOC), Geosmin, and MIB in their source water and are considering the use of membrane filtration to meet disinfection by-product (DBP) maximum contaminant levels (MCLs) and address taste and odor (T&O). Current operations are compared from plant to p...

Considerations that must be addressed when bidding an open platform UF system...

Eliminating sulfuric acid injection in the NF feed at the City of Palm Coast site improved cartridge filter run times and led to a significant reduction in chemical consumption. The total annual savings in operation costs were estimated to be approximately $145,000. A laboratory analysis performed for this study indicated that the foulant matrix co...

This paper discusses the pilot test results at El Paso, TX and the degree to which each NF/RO permeate stream affects UV-AOP performance, as well as the influence of this performance on NF/RO membrane selection for the full-scale facility....

This paper describes the broad application of cost-effective zero liquid discharge (ZLD) for desalination concentrate management. Costs, residual management, crystallizers, brine concentrators and more are discussed within the presentation....

This paper will discuss the results of this testing and cleaning of microfiltration and ultrafiltration membranes used for potable reuse. Emphasis will be on optimal Clean in place strategies and piloting was done at the Roberto R. Bustamante Wastewater Treatment Plant in El Paso Texas in anticipation of the new Advanced Water Purification Facility...

Three recent case studies in Ohio investigated the appropriate technology selection for softening. Financial comparisons between membrane softening and more traditional softening technologies like lime softening and ion exchange softening were comparable. However, additional critical factors beyond finances have the ability to disqualify membran...

This paper and associated conference presentation discuss the multi-faceted function of NF/RO in potable reuse treatment and the influence of this diverse functionality on the cost-benefit analysis between the performance enhancement and economic efficiency strategies for treatment system design. The critical role of NF/RO integrity testing in such...

With a diverse portfolio of water resources increasingly strained by a prolonged drought, El Paso Water (EPW) is developing a direct potable reuse (DPR) project to recycle 10 million gallons per day (MGD) of unchlorinated secondary effluent from its Roberto R. Bustamante Wastewater Treatment Plant (WWTP). Institutional knowledge about potable reuse...

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The use of alternative, lower quality sources, such as brackish groundwater, saline surface water, and recycled wastewater (i.e., for potable reuse) are rapidly becoming an integral component of long-term portfolio planning, and all nearly all of these alternative supplies require desalination. However, in many areas, particularly inland locations...

Although significant progress has been made toward the development of continuous direct integrity test methods for NF/RO systems, the current industry discourse has largely overlooked the challenge testing requirements described in the Membrane Filtration Guidance Manual (MFGM). However, some state regulators may be unwilling to grant significant p...

Although seawater desalination has been broadly implemented around the globe, historically there have been no comprehensive studies examining the impact of integrating desalinated seawater into existing distribution systems historically utilizing more conventional sources of supply with widely varying water quality. WRF-15-06 addresses that researc...

The use of alternative, lower quality sources, such as brackish groundwater, saline surface water, and recycled wastewater (i.e., for potable reuse) are rapidly becoming an integral component of long-term portfolio planning, and all nearly all of these alternative supplies require desalination. However, in many areas, particularly inland locations...

Lancaster's Upper Hocking WPCF is a novel membrane bioreactor treatment facility with a current rated capacity of 2 MGD and detailed design underway on an additional 2-MGD expansion. Following influent fine screening and biological treatment in a series of vertical loop reactors, mixed liquor enters one of three membrane tanks equipped with 0.1-mic...

This paper will provide an overview of the City of Lancaster's South Water Treatment Plant. A description of the raw and finished water quality goals, high-level design criteria for each of the unit processes, unique features of the plant, and planned upgrades will be presented....

Increasing demand for existing freshwater resources among a variety of beneficial uses (i.e., municipal, agricultural, industrial, and environmental) is straining available supplies to an unprecedented degree. The competition for these supplies has been intensified by the protracted droughts that have afflicted the desert Southwest, California, Tex...

Increasing demand for existing freshwater resources among a variety of beneficial uses (i.e., municipal, agricultural, industrial, and environmental) is straining available supplies to an unprecedented degree. The competition for these supplies has been intensified by the protracted droughts that have afflicted the desert Southwest, California, Tex...

Full advanced treatment (FAT) consisting of reverse osmosis (RO) and advanced oxidation process (AOP) has been widely used in indirect potable reuse (IPR) applications in California and some other states and is expected to be a major component of the direct potable reuse (DPR) trains in future. FAT has been proven very effective in reliably meeting...

Full advanced treatment (FAT) consisting of reverse osmosis (RO) and advanced oxidation process (AOP) has been widely used in indirect potable reuse (IPR) applications in California and some other states and is expected to be a major component of the direct potable reuse (DPR) trains in future. FAT has been proven very effective in reliably meeting...

In many potable reuse projects, we largely rely on traditional control logics along with the conservative set points to take a unit process or entire treatment train offline to prevent the public consumption of unsafe water. While it represents a safe solution, it does not necessarily reflect the best management strategy due to potential losses of ...

In many potable reuse projects, we largely rely on traditional control logics along with the conservative set points to take a unit process or entire treatment train offline to prevent the public consumption of unsafe water. While it represents a safe solution, it does not necessarily reflect the best management strategy due to potential losses of ...

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The Claude “Bud” Lewis Carlsbad Desalination Plant (CDP) was completed in December 2015 and produces approximately 50 MGD of locally controlled drought-proof, potable water for San Diego County. The Water Research Foundation (WRF) initiated Project 4773, entitled Carlsbad Desalinated Seawater Integration Study, to assess the integration of seaw...

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Solutions Volume 41 Issue 1 2022...

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