Carlsbad, CA SW pilot study to evaluate various pretreatment schemes....

The mission of the Affordable Desalination Collaboration (ADC) is to promote seawater desalination using reverse osmosis (SWRO) as an affordable, viable source of fresh water. In order to accomplish this mission the ADC conducted a multiphase pilot taking feed water from the Pacific Ocean (Navy intake at Port Hueneme, CA). This paper contains pil...

This presentation compares conventional and membrane technologies for the pretreatment of Seawater Reverse Osmosis (SWRO) systems. The variability of open intake seawater feed sources creates a demand for superior RO pretreatment. UF/MF pretreatment consistently produces RO feed water of superior quality, regardless of the raw water quality. The b...

The intent of this paper was to review reverse osmosis and nanofiltration membrane plants located in five states. The plants selected address both inland and coastal designed facilities as well as various plants using nanofiltration membranes, brackish water membranes and low pressure energy efficient membrane processes. Discussions for each plant ...

This paper introduces improvements in both reverse osmosis (RO) and nanofiltration (NF) membrane polymer chemistry and in spiral wound RO/NF element construction. These improvements are focused on reducing the rate of fouling in high fouling feed waters while enhancing the quantity and quality of permeate water that can be economically produced. Th...

A new method to separate boron from seawater was developed. A cost effective technology based on the reaction of glycidyl ether and amine showed particular promise. Using the technology, a compound was synthesized with glycidyl hexadecyl ether and N-methyl-D-glucamine at mild conditions. The compound showed exceptionally high boron absorption. In t...

The basic concepts of reverse osmosis technology is presented. Topics covered include membrane materials and construction, RO element details and an overview of RO systems....

An industrial manufacturer in Southern California utilizes city water in its manufacturing and testing processes. In order to meet the water quality needs of manufacturing, the potable water supply (with a total dissolved solids (TDS) varying from 400 to 500 parts per million (ppm)) was additionally treated at the manufacturing plant site using a f...

A general overview of nanofiltration and reverse osmosis water treatment technologies. Topics include feedwater and peremeate water quality, membrane and pressure vessel assembly construction as well as membrane fouling and data normalization...

This presentation discusses the operation and troubleshooting of reverse osmosis membrane systems. Operations topics include system monitoring and data normalization. Troubleshooting topics include probing, bubble testing, autopsy, fouling, abrasion, oxidation and scaling....

The successful use of a hybrid membrane design and turbo booster at the City of Oxnard, CA is presented. The first stage of the system has high permeable energy saving membranes, whild the second stage has lower permeable higher rejecting membranes. The turbo pump optimizes the overall energy performance of the system....

This paper reviews recent pilot projects conducted in the United States and Singapore where reverse osmosis is being used in conjunction with membrane bioreactor (MBR) technology to treat municipal wastewater for potential indirect potable reuse. MBR technology is capable of producing low TSS effluent suitable for reverse osmosis treatment. Special...

The performance of RO membranes wih a new thicker brine spacer that has biostatic agent is compared against conventional spacer technology. The unique geometry of the new spacer demonstrates improved performance in both lab and full scale systems....

An increasing number of brackish water RO (Reverse Osmosis) and NF (Nanofiltration) systems are being designed and operated on high salinity feed water sources which can range from 2,000 to 10,000 mg/l TDS (Total Dissolved Solids). Increased feed TDS can dramatically impact the design of the RO/NF in terms of hydraulic design, feed pressure require...

The paper will discuss the integration of the membrane system, Nancy Water Treatment Plant in Nancy, France with the conventional treatment and present almost 4 years of operation of the surface water treatment plant....

This paper will present the Kindasa Phase-B Plant experience of a UF-SWRO-BWRO integrated membrane plant....

SUSTAINABLE AGRICULTURE - OPTIMIZING MEMBRANE USAGE FOR WATER CONSERVATION...

This PowerPoint gives a case study of the membrane performance at the Southmost regional Reverse Osmosis Water Treatment Plant in Brownsville Texas...

This presentation discusses advancements in reverse osmosis (RO) spiral wound element design with emphasis on 16-inch RO elements. Differences between 16-inch RO elements and traditional 8-inch elements are discussed along with special handling requirements for 16-inch elements. An overview of the Sorek, Israel seawater RO facility is also provided...

Discusses RO/NF membrane chemistry and design of high sulfate rejection NF membranes. These NF membranes are designed specifically for offshore desalination in O&G production allowing operation at much lower pressures than conventional SWRO....

This presentation provides an overview of why pretreatment and post treatment are needed for RO and describes how to select them. It covers the advantages, including the smaller footprint, consistent water quality, reduced chemical cost; as well as disadvantages of utilizing UF as RO pretreatment. It also describes the critical parameters that sho...

This presentation briefly discusses Singapore?s Waste Water Reclamation and generation of ?NEWater? by utilizing Microfiltration and Reverse Osmosis. It also indicates that Singapore imports water from Malaysia....

In November 2008, the City of Oxnard, located sixty miles northwest of Los Angeles, commissioned its first, large scale, brackish water reverse osmosis (BWRO) desalination water treatment facility as part of its comprehensive regional water resources development program. The uniquely designed RO uses energy saving technologies in a hybrid configur...

Fouling of RO membranes in wastewater treatment due to organic contaminants is a major challenge which has limited the broad scale implementation of the technology. A variety of detailed studies of WWRO fouling at commercial facilities are examined in this paper to better understand these fouling trends and the role of dissolved organic chemicals...

This paper will explore the other practical issues that can arise when very high permeable SWRO membranes are used. One example is the flux imbalance that can occur in a pressure vessel. It is not unusual for the net driving pressure of the feed end to result in flux rates which differ by a factor of 10 times from the first to last element in the v...

Stone Brew Co. in Escondido, California, built a brand new brewing facility with a simple wastewater treatment system adjacent to a restaurant and one acre beer garden in 2005. After some significant production growth, the City threatened to significantly increase the water rate to be able to accommodate the higher organic strength and solids conte...

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...

This paper discusses the design and performance of nanofiltration plants for municipal water supply and the various regional needs for the technology. The paper contains the comparison of various NF plant designs and operation conditions and concludes that these plants provide a very reliable water source to the local municipality and a water quali...

A nanofiltration membrane was successful in removing color ina highly colored wastewater from a pulp and paper plant. Initial lab trials with this color removal NF membrane and plant wastewater proved that the color could be removed at high recoveries, but when trialed at the plant, it was found that the NF elements readily fouled. Further exper...

The semiconductor industry uses 1,500 gallons of ultrapure water to make a single 300 mm silicon wafer which generates a high volume wastewater stream high in silicon and turbidity. Using ultrafiltration that is backwash-free (air scour only) to recycle the waste stream has proven to be equally as effective as backwash and air scour. The filtrate c...

After 13 years of operation at Palm Beach County, FL, the nanofiltration elements were replaced with a hybrid nano/RO system that resulted in an energy savings of 30% while maintaining permeate quality....

Inverness CA has a potable water issue with high levels of color and DBP from a surface water source. NF was able to reduce the color and DBP at low feed pressures and low energy costs. The NF membrane used can be sanitized with chlorine....

This paper describes the treatment of warm mine water with a newly developed membrane element to withstand higher temperatures and the pilot results....

Prolonged drought across the Southwest United States has caused water utilities to consider alternative supplies. Critical to developing these supplies is an increased reliance on proven technologies such as reverse osmosis (RO). Critical to this technology is the membrane element. While the industry is mature, advances in membrane design and co...

This presentation will introduce the spectrum of membranes used in home, municipal, and industrial applications. The membranes types will be reverse osmosis, nanofiltration, ultrafiltration, microfiltration, and membrane bioreactors. We will highlight the attributes of each membrane type ranging from what is rejected to the pressures required to ac...

This presentation discusses the existing and potential implementation of membrane technology in Oil and Gas field applications. It mainly focuses on the upstream drilling water treatment and produced water treatement. Special membrane and element material properties that are desired to solve real field water treatment needs for drilling and recycli...

Though the use of membranes for reclaiming municipal wastewater is well understood thanks to over 30 years of experience, the reclamation of industrial wastewater is an ongoing challenge due to the variation and complexity of the incoming feed waters. For such waters, piloting is typically recommended. This paper will follow the process of piloting...

In many regions, wastewater discharge from industrial sites must be greatly minimized or completely eliminated. To reduce energy and capital costs, multiple membrane are often included to maximize recovery of water. Two new, key membrane processes which have been developed for this are nanofiltration membranes which separate sulfate and chloride ...

This presentation will introduce the spectrum of membranes used in home, municipal, and industrial applications. The membranes types will be reverse osmosis, nanofiltration, ultrafiltration, microfiltration, and membrane bioreactors. We will highlight the attributes of each membrane type ranging from what is rejected to the pressures required to ac...

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Mount Pleasant Waterworks (MPW) is currently operating the first municipal drinking water RO system using a new, thin membrane technology. The new technology increases the amount of active membrane area that can be manufactured in the standard spiral wound element. Mount Pleasant Water District is the first municipal district to replace conventiona...

Mount Pleasant Waterworks (MPW) is currently operating the first municipal drinking water RO system using a new, thin membrane technology. The new technology increases the amount of active membrane area that can be manufactured in the standard spiral wound element. Mount Pleasant Water District is the first municipal district to replace conventiona...

There will be a review of MF and UF membrane products in the market and how they are used. This will include an overview of Preventative Maintenance, Troubleshooting, Module Maintenance, and Module Replacement. A knowledge of how, when and why MF/UF foul and a set of good maintenance procedures, membrane modules can be quickly repaired and returned...

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