Presentations by MIT
Matches: 138
Implementation of Membrane Technology at the City of Barberton, Ohio
This paper describes concerns for the implementation of microfiltration (MF) and ultrafiltration (UF) technology at an older conventional water treatment plant located in Barberton, Ohio. Actual specifications language and evaluation forms are used to illustrate potential solutions to obtaining full implementation costs and providing detailed econ...
Evaluating Nanofiltration, Reverse Osmosis, and Ion Exchange to Meet Consumptive Use Constraints and Finished Water Quality Goals for Broward County
The paper describes the evaluation of nanofiltration, reverse osmosis and ion exchange to meet the consumptive use constraints and finished water quality goals for Broward County Florida...
Startup of the First Nanofiltration Membrane Plant Using New Low Fouling Technology
This paper describes the work realted to the design, pilot teting and startup of the City of Deerfield Beach nanofiltraton membrane plant using low fouling membrane technology....
Designing the First Membrane Treatment Facility for Florida's Largest Water Utility
This paper describes the design of a membrane treatment facility for Miami Dade Water and Sewer District for the dual treatment objectives of membrane softening and nitrate reduction for the South Miami Heights WTP. In addition, this facility will use an integrated membrane approach using parallel treatment trains of ultralowpressure (ULP) reverse...
Implementation of a 50 MGD Low-Pressure Membrane Filtration System for the Existing Racine Water Treatment Facility
This paper also discusses how an innovative evaluated bid process was used for selection and procurement of the membrane treatment system. Implementation of a 50 MGD Low-Pressure Membrane Filtration System for the Existing Racine Water Treatment Facility...
Economics of Implementing Membrane Filtration into the Existing Highland Park WTP to Provide Increased Capacity versus Advanced Disinfection
This paper presents a summary of analyses conducted for the City of Highland Park, IL evaluating the implementation of membrane filtration for increased capacity and/or advanced disinfection and comparing the economics to various alternative treatment strategies....
The Current Use of Membranes for Wastewater Treatment
The paper descibes a worldwide inventory and a survey done in 2003 of full-scale municipal wastewater treatment facilities using membrane technologies The purpose of the inventory was to evaluate the types of membranes in use, geographical distribution, and chronological trends....
Squeezing Water from the Rocks: Water Reuse for West Texas
This paper describes the feasibility of: Reuse of wastewater treatment plant effluent for industrial supply, municipal supply and irrigation ;Reclamation of previously unsuitable (diverted) water for raw water supply and Treating poor quality groundwater to potable supply quality...
Startup of the 40-mgd Glades Road Nanofiltration Plant for the City of Boca Raton
This PowerPoint describes the Startup of the 40-mgd Glades Road Nanofiltration Plant for the City of Boca Raton...
Overview of Concentrate Management Options
The PowerPoint presentation reviews concentrate disposal methods for reverse osmosis facilities in the United States...
Florida's Largest Water Utility Looks to RO for Developing Alternative Water Supplies
The South Florida Water Management District (SFWMD) has placed increased emphasis on the development of alternative water supplies for South Florida due to concerns of increased withdrawals on the sustainability of the Biscayne Aquifer. As a result, an application for a consumptive use permit renewal must now include provisions for the development ...
No Space? No Problem! Conversion of a Contact Stabilization Plant to a State of the Art MBR Saves Utility Millions
The City of Marco Island operated a wastewater treatment facility comprised of three parallel treatment units. The existing wastewater treatment facility is bound by various commercial and utilities sites with little available land for new structures. A real estate boom and extensive sewering program resulted in an increased demand for utilities s...
A Pilot Scale Investigation of the Effects of Water Blending on an Existing Hybrid Low Pressure Reverse Osmosis System
This paper describes a Pilot-Scale Investigation of the Effects of Water Blending on an Existing Hybrid Low Pressure Reverse Osmosis System The project includes the assessment of membrane performance, biological activity, water stability, and foulant analysis. The results presented found the blending should not result in any adverse effects....
Breaking New Ground in California's Seawater Desalination: The Sand City Story
This presentation describes a city's goal of implementing a desalination project supplied by beach wells to facilitate city-wide redevelopment. Significant measures were taken to reduce both capital and operating costs through energy recovery, high efficiency pumps, and off-peak operation. By utilizing this design approach, and making use of a 50% ...
Construction and Start-Up of the Clewiston RO Plant
This paper described the design and construction of the City of Clewiston 3 mgd reverse osmosis plant, a grass roots facility that included new raw water supply wells, new water treatment plant and a deep injection disposal well...
Pilot-Scale Comparison of Granular Media Filtration & UF Pretreatment Systems for Open Intake Seawater Desal
This paper describes the results of a pilot-scale study to optimize granular media filtration and ultrafiltration (UF) pretreatment systems in a reverse osmosis (RO) seawater desalination process and presents initial results that compare alternative pretreatment systems. The testing program includes three major activities water quality monitoring, ...
Implementation of the Largest Package MBR WWTP
This paper discuss' why package MBR units are not just plug and play. There is a tremendous amount of interaction and involvement required by all parties - the Utility, the Engineer, and the Manufacturer - for the successful implementation of the prepackaged units. Some of the key issues brought up both during design, construction, and operations ...
6-mgd Low Pressure Membrane Expansion for Weatherford, Texas: Pilot Testing Through Start-Up
This paper will summarize the challenges and solutions faced during design and construction of the Weatherford, Texas Water Purification Plant microfiltration facility. Those challenges include limited space at the existing facility, and compatibility issues for operating the new membrane filtration process in parallel with the existing treatment ...
Deerfield Beach Constructs an RO Plant with Optional Reuse of NF Concentrate in Response to New Regulatory Requirements
The paper will provide an overview of the effort at Deerfield Beach new RO plant for any new equipment required, tie-ins to existing equipment, pilot test results, water quality issues, etc. The paper will also discuss the pilot test results which are the basis for the concentrate reuse option....
Eliminating Second Stage UF in the Country's Largest Zero Liquid Discharge Membrane Treatment Facility
This paper describes the pilot testing and retrofit of a CA UF drinking facility treating a degraded quality surface water which operates with ZLD. Challenges encountered during the project include: permtting, deteriorating source water quality and continued operations. Final design eliminates one stage, decreases flux by 15% and reduces energy a...
The 2% Problem Solution: Can Membranes Provide The Answer
This is a paper not only about concentrate disposal and experiences in high usable product water recovery, but also about the basic considerations necessary to achieve that high membrane recovery....
Improving Nanofiltration Plant Performance - The City of Pompano Beach Case Study
Improving Nanofiltration Plant Performance The City of Pompano Beach Case Study...
Advancing Desalination
This paper provides a National perspective on Desalination Technology. The reports states that Desalination technology is being used to meet water supply demands in over 140 countries around the world, and international support for desalination research appears to be growing. Concentrate management remains an issue and can be a constraint. Bracki...
Retrofitting Conventional Filters to Membranes PE
Overview of the design, construction and commissioning issues associated with retrofitting a conventional filter basin with membrane filtration technology...
Permitting & Discharge Issues & Concerns
General presentation on microfiltration/ultrafiltration and reverse osmosis municipal applications, capabilities and regulatory requirements....
Overview of City of Alcoa's Submerged Ultrafiltration (UF) Water Treatment Plant
Detailed presentation on the development and implementation of the City of Alcoa, Tennesee's submerged ultrafiltration water treatment plant....
Case History: Retrofit of the 1960's Murfreesboro Plant to Membranes
Detailed presentation on the membrane filtration retrofit of the City of Murfreesboro Stones River Water Treatment Plant....
Microfiltration Treatment of Acid Rock Drainage
Traditional treatment of acid rock drainage consists of pH adjustment, clarification, and sand filtration. Then the pH is adjusted back to a normal range and the effluent is discharged. These operations are prone to clarifier upsets and filter clogging. A ceramic MF membrane was used to replace the clarifier and sand filter. This membrane was opera...
Impact of Source Water on Indirect Potable Reuse - Is More Pretreatment Always Better?
This paper evaluates the use of secondary versus tertiary water for sourcewater ro indirect potable reuse. The addition of Mannich polymer for tertiary treatment results in increased NDMA formation. Ths paper compares the operation of the unit processes for the indirect potable reuse on both source waters. The source water and product water quali...
Identifying the Causes and Possible Solutions to High Recovery RO Membrane Fouling
High recovery RO techniques are being developed which can recover from 90 to 98% of the water leaving a relatively small volume concentrated brine that can be cost effectively managed. In order to attain such high recovery, special precautions and pre-treatment procedures are necessary to minimize fouling, including softening and the use of antisca...
Challenges in Designing a Reverse Osmosis System for a Tidally Influenced Surface Water Source with Wide Variations in Salinity and Temperature
Tidally influenced surface water sources that are being treated or being considered for treatment include the Taunton River in the Massachusetts, the Hudson River in New York, the Chesapeake Bay, Tampa Bay, and the San Francisco Bay. These raw water sources can experience changes in salinity as great as 10,000 mg/l and changes in temperature of ove...
Special Applications for Drinking Water Membranes
Discussion of the five basic membrane technologies: MF, UF, NF, RO and ED; and the general class of membrane treatment capabilities. Examples of special treatment considerations in understanding how various drinking water membrane are utilized innovative applications....
Case Study: Operating Costs for Minster Ohio Membrane Softening Plant
Case study of operating costs for Minster, OH membrane softening (MS) / nanofiltration (NF) WTP. Treatment O&M cost by category i.e. chemicals, electric, engineering services, labor, membrane replacement, etc. Membrane specific O&M cost by Components....
Brine Minimization Alternatives
The development of membrane based brine minimization alternatives that do not require traditional lime softening pre-treatment provide the designers and operators of inland brackish water RO systems additional tools for concentrate management. The most cost effective alternative will depend on the feedwater chemistry, ultimate disposal options, fun...
Sand City Desalination Plant: Operations, Performance, and Cost Case Study
This paper presents the approach taken in both permitting and design of the Sand City seawater desalination facility and will provides an update on one year's worth of operating data, costs, and challenges to complete permitting and startup as well as energy recovery considerations....
An Answer to South Florida's Sustainable Water Supply
Biscayne Aquifier, Floridan Aquifer, South District Water Reclamation Plant, Miami-Dade Water and Sewer Department...
Dania Beach Design/Build Stimulates Membrane Plant Upgrade
This paper will present the innovative membrane treatment plant design for the Dania Beach membrane plant that was developed to meet these challenges by maximizing system recovery while providing a developed to meet these challenges by maximizing system recovery while providing a high degree of operating flexibility. This design includes a two stag...
Selecting a Membrane Filtration System for RO Pre-Treatment: The South District Experience
Membrane Filtration Systems for RO Pretreatment...
Pretreatment Issues for a UF/RO Landfill Leachate Treatment Plant
This paper discusses various Ultrafiltration performance issues that were encountered and pretreatment strategies that were developed and tried out to optimize the performance of the UF/RO system on a landfill leachate. Biofouling, solids interference, anaerobic conditions were some of the conditions that needed to be addressed and resolved. Includ...
Design and Operation of Membrane Bioreactors for Nutrient Removal and Reuse
This presentation discusses the application of membrane reactor technology for nutient removal and water reuse. Aqlternative flowsheets are presented, with a discussion of alternatives to RO for MBR effluent polishing. A case study for Rancho Rio, NM, is presented....
Discounted Electrical Rates
This PowerPoint presentation describes electrical rates and how to minimize costs...
MF/UF Design Considerations
This PowerPoint discusses microfiltration and ultrafiltration plant design considerations....
MF/UF Design Considerations
This presentation discusses microfiltration (MF) and ultrafiltration (UF) membrane types, design parameters, raw water quality impacts, facility layout design, and system component design. The presentation begins with general terms and then transitions to design tips for pressure and submerged systems inclusive of equipment layout, pumps, piping, a...
Design-Build: An Engineer's Perspective
This presentation discusses project delivery methods and compares the design-build approach with the design-bid-build and construction manager at-risk methods. The comparison includes data on relative unit cost, construction speed, delivery speed, and schedule growth. Types of design-build arrangements are also discussed including prescriptive bids...
MF / UF / MBR Technologies
This presentation provides a review of microfiltration (MF), ultrafiltration (UF), and membrane bioreactor (MBR) technologies for municipal applications. Presentation topics include membrane types, terminology, feed and filtrate water quality, and system components. The presentation concludes with a comparison between MF/UF operations for drinking ...
Converting Produced Water into Drinking Water
This presentation discusses the challenges associated with recovering produced water for potable water use. It discuses regulatory challenges, economic factors, and treatment approaches utilized in pilot testing....
MF/UF Water Quality, Performance, and Applications
This presentation covers MF/UF water quality, performance, and applications. It provides an overview of the basic principles of membrane filtration, typical MF/UF treatment objectives and elaborates on the differences between pressurized and submerged systems....
Pilot Testing of the Lower Hudson River for Potable Water Production
PILOT TESTING OF THE LOWER HUDSON RIVER FOR POTABLE WATER PRODUCTION.within Haverstraw Bay approximately 40 miles upstream, United Water New York Inc. is pilot testing various technologies to produce potable water. This reach of the river is brackish and can see primarily freshwater conditions during high river flow conditions to saline brackish w...
Pilot Testing Confirms Reduced pH and Sclae Inhibitors Controls Scaling at 96-Percent Recovery
The East Cherry Creek Valley Water and Sanitation District (District) is constructing a 10 MGD brackish water reverse osmosis project to provide a new renewable water source to a portion of the southeast metropolitan Denver that is currently served exclusively from deep non-renewable groundwater. The District evaluated several concentrate disposal ...
Challenges & Sucesses Operating and Expanding the Newark Desalination Facility
An account of the challenges operating and expanding the Alameda County, CA Water District?s Newark Brackish Water Desalination Facility is provided. Topics detailed include historical operational performance and cost, upgrading of cartridge prefilters, stainless piping well failures due to corrosion and concentrate disposal....
How to Choose RO Membranes for IPR
Study compares advanced treatment pilot testing results aimed at reducing maintenance costs while also improving contaminate rejection in application of indirect and direct potable water reuse. Evaluation focuses on failing rate, salt passage and reduction of contaminants of emerging concern. Reverse Osmosis membranes from three manufacturers were ...
Retrofitting Singapore's Jurong Water Reclamation Plant with Membrane Bioreactor - Minizing Energy Consumption through Selection of Unique Design Parameters
Paper presents the deisng considerations of the Jurong membrane bioreactor treatment facility in Singapore. The plant was designed retrofitting existing aeration basins with a membrane bioreactor to produce effluent which is suitable for reuse in industrial applications. Report outlines steps taken that are expected to reduce overall energy consump...
MF/UF Water Quality, Performance, and Applications
Presentation provides an in-depth look at the use of microfiltration and ultrafiltration membrane applications. Both skid mounted and submerged configurations were reviewed with the relative benefits of each defined. The technologies are offered as effective tools for turbidity and pathogen removal or for pretreatment for complex nanofiltration or ...
General Introduction to Shale O&G Development & Environmental Challenges
Shale oil and gas, accessed by horizontal drilling and hydraulic fracturing, is a critical and growing part of North American energy production plans. One of the challenges faced during extraction is the treatment and management of flowback, also called frac or produced water. In this presentation a flowsheet is examined with a focus on viable a...
Increasing the Overall Recovery Rate at the Leo J. Vander Lans Water Treatment Facility to Greater than 92%
This paper is a case study that discusses increasing the recovery of the he Leo J. Vander Lans Water Treatment Facility (LVLWTF) to 92%. The plant was designed or a microfiltration recovery of 94% and a reverse osmosis recovery rate of 85%. In this study the 3rd stage RO system was piloted to confirm its viability. This paper then highlights the d...
Water Chemistry Implications of High Recovery Membrane Systems
This paper discusses the implications that increasing water recovery has on feed water chemistries and how additional pretreatment is required to eliminate specific solute compounds from interfering with reverse osmosis (RO) system separations and efficiency. Examples of actual system designs with specific feed water chemistries are discussed to s...
Process Optimization for the San Diego IPR Demonstration Plant
This paper will compare operating results from the membrane filtration and RO systems applied for indirect potable reuse (IPR), comparing each system configuration and membrane type based on fouling rates, product water quality, and energy usage. These results will also be compared against available operating information from full-scale facilities...
Energy Recovery Strategies for Brackish RO Facilities with Varying Water Quality Conditions
This paper describes work to consider design with energy recovery systems for tidally influenced surface water sources that have wide variations in TDS and temperature The overall power consumption for the two turbocharger options, the motor assisted turbocharger option and the pressure exchanger system were evaluated. This demonstrates the sens...
Enhanced Coagulation and In-Line Filtration with Membranes to Optimize Surface Water Treatment for Regulatory Compliance
This paper presents full-scale start-up and performance results for the upgraded East Valley Water District Plant 134, with the implementation of enhanced coagulation using ferric chloride followed by in-line filtration with submerged PVDF membranes. Operational approaches and results relative to disinfection by-product (DBP) precursor and total o...
The heat is ON: Startup at ECCV's 10.8 mgd inland RO facility during record breaking temperatures and demands
This paper describes the start-up of the East Cherry Creek Valley Water and Sanitation District (ECCV) 10.9 million-gallon-per-day (MGD) brackish water reverse osmosis (RO) treatment facility in 2012 during record breaking temperatures. The plant provides a renewable water source to areas of southeast metro Denver currently served exclusively by no...
MF/UF Water Quality, Performance, and Applications
Presents a discussion on the drivers to impliment membrane technology and an overview of membrane configurations. Discusses considerations for feed and product water quality with an basic overview of where low pressure membranes are typically applied....
MF/UF Water Quality, Performance, and Applications
This presentation from a preconference workshop in 2014 for Back to Basics on membrane technology discusses microfiltration and ultrafiltration water quality and how it influences system performance. System design and MF/UF applications are presented....
Optimizing the Use of Membrane Systems for the Removal of Disinfection By-Product Precursors
Online TTHM analyzers allow plant operations to be varied so that TTHM precursors in the bromoform family are adequately remove while the treatment process is optimized to reduce operating cost....
Addressing Start-Up Challenges With An In-Line Filtration Facility
This paper discusses the use of in-line filtration with ultrafiltration (UF) membranes for disinfection by-product (DBP) precursor reduction, the challenges experienced during start-up of the facility, and the measures taken to address these challenges. The paper also demonstrates that while the membrane processes are often the focus of membrane f...
Features of New PTFE-Made Microfiltration Hollow Fiber Membrane Module and Its Application for Oil and Gas Wastewater Treatment
Large amounts of wastewater are generated by some processes used to extract underground crude oil. A PTFE hollow fiber MF/UF membrane offers a reliable method of treating this wastewater and provides long duration operation and durability when cleaning the membranes. The PTFE hollow fiber MF/UF membrane is effective in removing oil residues from ot...
15,000 hours of Membrane Operational Experience: City of San Diego Advanced Water Purification Facility
Data generated from the City of San Diego Advanced Water Purification (AWP) demonstration project was used to support the City?s proposal for conditional regulatory approval and estimate of capital, operational and maintenance (O&M) costs of a potential full-scale project. The potential full-scale project would purify tertiary effluent from North C...
Challenge Testing Osmotic Pre-treatment for Desalination
A desalination system comprising of two purification stages was developed: (1) a low-pressure forward osmosis pre-treatment stage that eliminates foulants from the feed water followed by (2) a high-pressure high-permeability reverse osmosis stage. The final prototype system demonstrated at the Port Hueneme facility desalinated a highly fouling chal...
Application of Universal MF/UF Membrane Skid in a Full Scale Wastewater Reclamation Plant-Challenges and Future
During the last decade, the water industry has observed the dramatic increase in the application of Microfiltration (MF)/Ultrafiltration (UF) membranes for water and wastewater treatments. According to the latest report from the Global Water Intelligence, the global MF/UF membrane market is estimated to be around $220 mil. based on membrane sales o...
Integrating MF/UF Membranes into an Existing Lime Softening Water Treatment Plant: A Case Study
The paper presents the final membrane design integration into an existing facility that took advantage of site grading in order to be able to implement a unique membrane siphon design for anew submerged membrane system. Lessons learned during construction, installation, and initial membrane facility operation are discussed for this 24 MGD installa...
New High Recovery Fort Irwin Water Works Supports Critical Army Training Mission
A 2007 pilot study by CH2M Hill identified electrodialysis reversal (EDR) as the preferred main treatment process to reduce source water contaminants to below drinking water standards. EDR was preferred over RO due to high silica levels in the source groundwater, and over an activated alumina process. The pilot study concluded the EDR teesting demo...
Membrane Biofilm Reactor for Nitrate and Perchlorate Treatment
Research was conducted on a pilot-scale drinking water treatment plant system utilizing a membrane biofilm reactor (MBfR) for treatment of nitrate and perchlorate where the MBfR uses anaerobic autotrophic biodegradation for the complete destruction of nitrate and perchlorate. The purpose of the study was to demonstrate the feasibility of MBfR techn...
Planning, Design, CMAR Delivery, and One-Year Operation of An Integrated Membrane Surface Water Treatment Plant: City of Sugar Land?s Experience
Surface water treatment plant in Sugarland, TX to reduce dependence on groundwater resources. Use of an integrated membrane system to provide multiple barriers....
Membrane Facility Operations and Expansion - Transitions to Accommodate a Utility?s Needs
Pretreatment at a City of Fort Worth TX water treatment plant to a low pressure hollow fiber membrane system used ozone, clarification, and biological anthracite filters. Design, planning and operations are discussed....
Overcoming Obstacles to Create an Emergency Water Supply in California?s Water Crisis
Saga of the Cambria Community Service District starting in 1987 to develop a seawater desalination system stymied by the California Coastal Commission was abandon after a tumultuous period of opposition from vocal community groups and regulatory agencies due to enviornmental concerns. Modifications resulted in an Advance Water Treatment Project (A...
Universal MF/UF System Design Implemented in A Full Scale Wastewater Reuse Plant
It's expected that MF/UF system design will continue to move towards standardization as previously observed in the RO membrane industry. A universal skid design would be a significant advancement to the low pressure market, fostering end user confidence and increasing the overall potential for system sales. The first of its kind universal MF/UF ...
Startup/Testing and Operational Challenges of JBLM?s Low Pressure Membrane System
This session will discuss the process layout, design, performance parameters, and operating procedures of the army base, Joint Base Lewis-McChord's wastewater membrane filtration treatment of secondary effluent. We will discuss the startup and testing of the system in the context of the entire plant startup and testing. And will touch on alternativ...
Concentrate Management: Case Studies in Best Practices
This paper will present current concentrate management practices for select desalination facilities throughout the world. Benefits and drawbacks of each strategy will be discussed. This paper will also present numerous factors that should be considered when evaluating concentrate management strategies for a new desalination facility...
Using Seawater Desalination to Diversify California Water Supply
This paper examines a SWRO project in California and the key concerns of energy cost, source water supply and brine disposal. An innovative design using a new generation hybrid configuration of low pressure SWRO membranes and high boron rejection SWRO membranes is presented....
Optimizing Membrane Versus Thermal Processes for Brine Minimization
This paper compares brine minimization processes and examines the level of brine reduction that can be achieved, the limiting factors for brine minimization using membrane systems, and the advantages and disadvantages, operability and the relative economics of both the membrane and thermal process alternatives. Strategies for minimizing the treatme...
Electrodialysis Reversal (EDR) Treatment at Fort Irwin
This paper will provide an overview of the EDR process and describe the initial steps of startup of the system at the Irwin Water Works at Fort Erwin.High recovery rates and zero liquid discharge are some of the goals of the project....
1 + 1 = 3: How to Squeeze the Most out of Your Membrane System
This paper will present efforts at the City of Clearwater, FL to increase overall production of water by process performance studies and the approach to the design of the expansion. Challenges encountered and overcome throughout the course of this project, lessons learned, and select full-scale operating data will also be presented. Arsenic adsorp...
Implementing Universal UF Systems - Separating Truth From Fiction
This paper looks at four separate membrane filtration facilities where universal or semi-universal membrane skids have been incorporated, comparing design approaches, contracting approaches and plant operation with comparable facilities using proprietary membrane filtration systems. The paper also discusses the impact on construction at one facilit...
Coping With Increasing Groundwater TDS at the Largest Inland RO Treatment Plant
The presentation provides an overview of the alternatives and the estimated costs for the Kay Bailey Hutchison (KBH) Desalination Facility in El Paso, Texas to deal with increasing TDS levels in the groundwater that they treat using a low pressure reverse osmosis (LPRO) process, and blend the low TDS permeate with groundwater. The groundwater TDS h...
Making the Most of Limited Space: Repurposing Existing Structures to Maximize Capacity, Reduce Costs and Improve Facility Layout
This paper provides a case history of the Highland Park Water Treatment Project, highlighting how repurposing existing structures was used to meet the project goals. The project involved retrofitting an existing 21 MGD facility with a modern 30 MGD submerged membrane system. Special attention was paid to the limited space available for this 40% inc...
Incorporating Membranes into Your Treatment Process: Startup and Lessons Learned
This paper will present the challenges and solutions to implementing low pressure membranes at the Dallas County Park Cities Municipal Utility District (DCPCMUD), plant that treats surface water from Lake Grapevine. The membrane start-up challenges and lessons learned from over two years of membrane facility operation are presented. The change at t...
A Novel Air Backwashing Method for Reversing Wetting in Membrane Distillation
This paper describes a new method to reverse wetting of the hydrophobic membrane in membrane distillation. Pressurized air is pushed through the wetted membrane from the distillate side, thus forcing out wetted feed water, instead of merely allowing it to evaporate. To test its effectiveness, the liquid entry pressure (LEP) of the membranes was tes...
EPA Regulations on Reuse
The Guidelines for Water Reuse published by the United States Environmental Protection Agency (EPA) in 2012 facilitates development of water reuse by serving as an authoritative reference. The document covers both non-potable and potable reuse, but does not provide detailed information on current direct potable reuse practices. A challenge in imple...
Disposal of Concentrate to Surface Waters - Issues and Concerns
This presentation will discuss various factors that can affect the discharge of concentrate to surface water bodies. Factors such as water quantity and quality, environmental conditions, public concerns, and regulations, among others, will be examined. Case studies which highlight the significance of such factors will also be presented....
Membrane Fouling - a Case Study
One of the primary operational concerns with any membrane plant is fouling. This becomes even more of a concern at higher recovery and flux rates. A case study at a high recovery municipal installation demonstrates the ill effects of fouling from silica, calcium fluoride, and other foulants, as well as methods to identify and monitor, manage, and r...
Optimization of WWRO for Alamitos Barrier - Improving Performance Through More Aggressive Operation
The use of reverse osmosis (RO) to treat municipal wastewater for various reuse purposes has gained considerable momentum in recent years, with multiple facilities now exceeding 100 million gallon per day (mgd) in capacity. Early wastewater RO (WWRO) facilities, built 10 to 15 years ago, were generally designed with low RO fluxes to reduce the risk...
Pass The Salt - The Cambria Sustainable Water Facility Brine Solution
The Cambria Sustainable Water Facility is an indirect potable reuse facility located along the central coast of California. This presentation will focus on handling the brine discharge from the facility, including a summary of options and a discussion of the first year of operation....
The Cambria Sustainable Water Facility: One Year of Operation
The Cambria Sustainable Water Facility is an indirect potable reuse facility located along the central coast of California. This presentation will focus on start-up and operation of the plant, including operational challenges and product water quality....
Maximizing Energy Recovery from Brewery Waste Streams with Anaerobic Membrane Bioreactors and Biogas Conditioning
The New Belgium Brewing Company recently evaluated the effectiveness, reliability, and robustness of submerged anaerobic membrane bioreactor (AnMBR) technology at their Fort Collins, Colorado craft brewery. The pilot study drivers were the performance limitations of Upflow Anaerobic Sludge Blanket (UASB) digesters, space constraints and a desire to...
San Andres Turns to Seawater RO to Meet Critical Water Supply Shortfall
San Andres Island is located in the Caribbean northwest of the Colombian Coast. The northern part of the island is the center of the urban population and tourism, whereas the southern part of the island has a lower density, more rural population. The existing total water demand for the entire island is estimated around 5.14 mgd; however, the existi...
Carlsbad Water Recycling Facility Expansion: Design, Permitting, Startup, and Operations
The Carlsbad Water Recycling Facility (CWRF) is owned by the Carlsbad Municipal Water District (CMWD) and operated and maintained by Encina Wastewater Authority. Located in Carlsbad, CA, the CWRF treats secondary effluent from the adjacent Encina Water Pollution Control Facility to produce up to 4.0 mgd of Title 22 recycled water. The CWRF was cons...
Landfill Leachate MBR Plant Utilizing PTFE MF Membrane
PTFE (polytetrafluoroethylene) MF/UF membrane has a unique highly porous three-dimensional fibril structure not seen in other polymeric membranes. PTFE is temperature resistant and exceptionally high chemical resistant. Its temperature resistance allows for treatment of raw water at higher temperature and the chemical resistance allows cleaning by ...
Effect of Pressure on Alginate Fouling in Forward Osmosis
The superior fouling resistance of forward osmosis (FO) desalination with respect to reverse osmosis (RO) has prompted debate over the effect of hydraulic pressure. We present a method of isolating the effects of pressure from other differences (e.g., internal concentration polarization) between FO and RO: pressurizing the entire FO module. This me...
Predicted Network TTHM Levels Derived from Online THM Formation Potential Monitor Helped Optimize Reverse Osmosis Treatment and THM Management
This presentation will discuss the RO optimization afforded as a direct result of the real time high frequency data on daily THM, THM-FP, and PDN-THM values provided through the use on an online THM monitor....
Process Optimization and Adjustments Help save Money, Achieve Membrane Integrity, Reliability and Increase Membrane Life
Designing a membrane plant with the right parameters ensures that finished water production and water quality goals are achieved while minimizing unforeseen, premature and costly membrane module replacements. However, even with pilot testing, it is challenging to predict the impacts of seasonal or long term changes in raw water quality and the eff...
Making the Most of Limited Space for a New 30-MGD Submerged UF Membrane Retrofit in Highland Park, IL
The City of Highland Park, IL has recently completed implementation of a new 30 MGD submerged ultrafiltration membrane system into their existing drinking water treatment plant. Severe site constraints presented several challenges to the project and requried repurposing of many existing structures....
Little Town Big Water (Desalination and Other Challenges) Brackish Groundwater Treatment Facility for EPCWCID 4 (Fabens)
The EPCWCID 4 (District) water quality has deteriorated in the past years. A grant from USDA was provided for the design and construction of the RO facilities. The RO facility will allow the District to expand their existing Fe and Mn pretreatment capabilities to also remove TDS. The new system sets the District at the cutting edge of technology f...
Avoiding Tunnel Vision: High-Recovery Membranes in the Rocky Mountains
A newly built zero-liquid discharge industrial wastewater treatment plant for the treatment of groundwater flow from a railroad tunnel provides an excellent example of an elegant solution to a highly constrained challenge. The design of the plant was constrained by a lack of sewer or water connections, a small space in the midst of a ski resort to ...
Expanding Reuse for Carlsbad, California, Using Membrane Technologies
The City of Carlsbad installed a 3.4 mgd UF facility to expand the reuse from the adjacent Encina Water Reclamation Facility. Water quality from the upstream wastewater plant resulted in various operational challenges during initial plant start-up. The plant operators and design-build team were able to adjust maintenance cleaning approaches and rep...
That's a Good-looking 4th Stage on Your RO System
This presentation uses operations at an existing 10 mgd inland desalter facility (with an additional 10 mgd expansion currently being designed) and analysis from a four-stage pilot system to outline strategies to reduce the cost of high recovery RO, increase recovery of costly water resources thereby decreasing reliance on non-renewable water, and ...
Commissioning and Performance Testing a 6 MGD ZLD Drinking Water Treatment Plant
This presentation provides an overview of the commissioning and performance proving of a highly complex 6 MGD water treatment plant designed, built, and commissioned by CDM Smith. Located in the USA?s Mojave Desert, the treatment processes include three different membrane treatment systems (EDR, UF, and RO) in addition to lime softening, ion exchan...
Regulations for Wastewater Reuse
The Guidelines for Water Reuse published by the USEPA have served as an authoritative nationalwide reference in the support of state specific regulations. The document covers both non-potable and potable reuse, and was supplemented in 2017 with a Potable Reuse Compendium, focusing on key issues with the implementation of potable reuse. This present...
ZLD Treatment of Groundwater Flow from Railroad Tunnel
A newly built zero-liquid discharge industrial wastewater treatment plant for the treatment of groundwater flow from a railroad tunnel provides an excellent example of an elegant solution to a highly constrained challenge. The lessee of the one-hundred-year-old Moffat Tunnel in the Rocky Mountains was newly required to treat the water flowing from ...
Potable Reuse Side-by-Side Pilot Testing - O3-BAF vs. UF-RO on Two Different Source Waters
JEA recently completed Phase I of a 3-Phase plan to test and implement a potable reuse project. Phase I was a pilot-scale evaluation of alternative treatment trains (O3-BAF vs. UF/RO) on two significantly different source waters (residential vs. industrial/residential). This paper and presentation will present the approach and operating protocol us...
Batch Reverse Osmosis: Experimental Results, Model Validation, and Design Implications
This abstract presents experimental results from a prototype batch reverse osmosis (RO) system. Batch RO has attracted attention recently due its potential to bring the energy consumption of RO closer to the theoretical minimum. Numerous studies have modeled batch RO energy consumption, but only one study reports experimental data on the performanc...
Ten Years in the Desert: Challenges and Improvements to the KBH Desal Plant
The Kay Bailey Hutchinson Desalination Plant (KBH) in El Paso, TX has been operating for over 10 years. After 10 years of operation and changes in the water quality, it can no longer produce at the design capacity. A membrane replacement and the addition of interstage booster was determined to be a solution to return KBH to its design capacity....
Pilot Testing RO to Remove PFOS and Other Emerging Contaminants from a Surface Water Supply
Use of RO membranes to remove PFOS, PFAS, GenX, and Dioxane from drinking water obtained from a surface water supply (Cape Fear River). Contaminants of concerns are present in water supply due to discharge of compounds to the river and current conventional treatment does not remove them. The wo-stage RO membrane pilot test demonstrated the ability ...
Pilot Testing of Nanofiltration To Minimize TOC Levels and DBP Formation
The presentation describes the pilot testing arrangement with an infiltration supply well, ultrafiltration pre-treatment system and three stages of NF membranes to simulate full scale operation to reduce TOC to less than 0.8 mg/L. The pilot equipment was operated for three months at 90% to 96% recovery, and operational data were collected on pressu...
Overview of the Simplot Process Water Treatment and Return Plant Project with MBR and RO Membranes
The presentation will review the Simplot Process Water Treatment and Return Plant as an overview for understanding the project development prior to plant tour. Up to 3.2 MGD of the potato processing wastewater is treated in a complete zero-liquid discharge facility using Enhanced Biological Nutrient Removal, MBR and RO membranes and on-site evapor...
Brine Minimization Using Closed Circuit Reverse Osmosis (CCRO)
Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms is in the Mojave Desert in California and is one of the largest military training areas in the nation. MCAGCC relies on groundwater for its drinking water supply. Due to concerns about depletion of the existing aquifer and the presence of hexavalent chromium in some of the wells, MCAGC...
Design of a Greenfield 10 million Gallon per Day Ultrafiltration Membrane System
The City of Pearland is constructing a new 10 million gallon per day capacity surface water treatment plant (SWTP). The City has junior water rights to purchase 10 MGD raw water capacity from the American Canal, which is a man-made channel operated by the Gulf Coast Water Authority. The canal is fed by the Brazos River and natural drainage from the...
Is Seawater Desal the Future Water Supply for the Texas Gulf Coast
In 2013 CDM Smith prepared the Brazoria County Regional Water Facility study for the Brazosport Water Authority (BWA). The resulting recommendation was for the BWA to expand the water treatment, pumping and transmission system and to diversify their water source (with options such as brackish ground water) to improve water reliability during period...
Brine Minimization Using Closed Circuit Reverse Osmosis (CCRO)
Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms is in the Mojave Desert in California and is one of the largest military training areas in the nation. MCAGCC relies on groundwater for its drinking water supply. Due to concerns about depletion of the existing aquifer, and the presence of hexavalent chromium in some of the wells, MCAG...
Brine Minimization Using Closed Circuit Reverse Osmosis (CCRO)
Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms is in the Mojave Desert in California and is one of the largest military training areas in the nation. MCAGCC relies on groundwater for its drinking water supply. Due to concerns about depletion of the existing aquifer, and the presence of hexavalent chromium in some of the wells, MCAG...
Comparative and Challenge Testing of LPRO Membranes for PFAs and Emerging Contaminant Removal
Per- and polyfluoroalkyl substances (PFAS) continue to gain attention as potential health concerns, with the EPA intending to evaluate perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) for potential maximum contaminant levels (MCLs). Data from pilot testing of low-pressure reverse osmosis (LPRO) membranes has previously indicated t...
Comparative and Challenge Testing of LPRO Membranes for PFAs and Emerging Contaminant Removal
Per- and polyfluoroalkyl substances (PFAS) continue to gain attention as potential health concerns, with the EPA intending to evaluate perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) for potential maximum contaminant levels (MCLs). Data from pilot testing of low-pressure reverse osmosis (LPRO) membranes has previously indicated t...
Impact of Shock Organic Loading Rates on Fouling and Clogging Frequency of Membrane Bioreactors
Contrary to the traditional view, membrane technologies have offered solutions for reusing water obtained from sources such as seawater and wastewater. A limitation caused by membrane technologies, however, has been the hydraulic throughput of membranes mainly due to the growth of biofilm, resulting in membrane fouling. There has, nonetheless, been...
Impact of Shock Organic Loading Rates on Fouling and Clogging Frequency of Membrane Bioreactors
Contrary to the traditional view, membrane technologies have offered solutions for reusing water obtained from sources such as seawater and wastewater. A limitation caused by membrane technologies, however, has been the hydraulic throughput of membranes mainly due to the growth of biofilm, resulting in membrane fouling. There has, nonetheless, been...
Anaerobic membrane Bioreactors - Pushing Cross-Flow and Mixed Liquor Concentration to the Limit at a Brewery
Deschutes Brewery, Inc (Deschutes), a large national craft brewery, evaluated emerging anaerobic technologies for pretreatment of process waste streams from its brewery in Bend, OR. Deschutes sought to identify the best feasible technology for recovering energy resources and decreasing the overall environmental footprint of its operation. Deschutes...
Anaerobic membrane Bioreactors - Pushing Cross-Flow and Mixed Liquor Concentration to the Limit at a Brewery
Deschutes Brewery, Inc (Deschutes), a large national craft brewery, evaluated emerging anaerobic technologies for pretreatment of process waste streams from its brewery in Bend, OR. Deschutes sought to identify the best feasible technology for recovering energy resources and decreasing the overall environmental footprint of its operation. Deschutes...
The Headworks DPR Remonstration Project: Implementing DPR for the City of LA
The City of Los Angeles (City) is implementing various strategies for developing a sustainable, local water supply portfolio. One of the key strategies includes a potential potable reuse project sourced from the Los Angeles-Glendale (LAG) Water Reclamation Plant (WRP), with purified water delivered directly to the potable water distribution system ...
The Headworks DPR Remonstration Project: Implementing DPR for the City of LA
The City of Los Angeles (City) is implementing various strategies for developing a sustainable, local water supply portfolio. One of the key strategies includes a potential potable reuse project sourced from the Los Angeles-Glendale (LAG) Water Reclamation Plant (WRP), with purified water delivered directly to the potable water distribution system ...
Construction of a 10 MGD UF Surface Water Plant in Pearland, Texas
Investigating CCRO's Potential to Reduce Concentrate Flows on a Future Inland Water Reuse Application
Brine management is a critical project driver for inland water reuse applications. During a 6 month pilot investigation, EMWD operated a MF/CCRO pilot to demonstrate the viability of this novel treatment train to treat tertiary partially nitrified treated wastewater up to 94% recovery....
Investigating CCRO's Potential to Reduce Concentrate Flows on a Future Inland Water Reuse Application
Brine management is a critical project driver for inland water reuse applications. During a 6 month pilot investigation, EMWD operated a MF/CCRO pilot to demonstrate the viability of this novel treatment train to treat tertiary partially nitrified treated wastewater up to 94% recovery....
Role of Membrane Fouling Layer on Release of Antibiotic Resistance Genes from Anaerobic Membrane Bioreactors
Cost of Desalination
This presentation provides an overview of membrane treatment costs, particularly as they relate to the removal of CECs with membranes. The talk will discuss impacts that influence capital and operating costs, including feed water salinity, pretreatment requirements and brine disposal options. The impact of renewable energy and energy recovery on lo...
Tar Heels and Polyamide Reels: LPRO Piloting in the Old North State
This presentation will summarize three case studies of piloting low-pressure reverse osmosis (LPRO) for the removal of emerging contaminants, such as per- and polyfluoroalkyl substances (PFAS) and 1,4-dioxane. The speaker will profile the three subject communities, the intended goals for the individual pilots, the design and scope of these pilots, ...