Fouling study for a seawater plant using advanced analytical tools v SDI testing alone....

Paper discusses variety of pretreatment methods used over 25 years with seawater RO plants....

Reverse osmosis (RO) pretreatment is a key parameter in designing effective desalination plants. A pretreatment design depends on a variety of parameters including: water quality, dissolved organic carbon, SDI, Turbidity, algae concentration, temperature and seasonal changes. Treatment technologies can include conventional methods including: ba...

Successful performance of SWRO systems relies upon high quality pre-treated water. Lessons learnt from three (3) different membrane pre-treatment installations: 1. Kindasa, Jeddah, Saudi Arabia; 2. Buzzard Platform. North Sea, UK; and 3. WSC, Mobile Ship based system is provided. It is concluded that MF/UF provides an excellent and consistent tre...

This powerpoint presents an overview of water supply conditions for various islands in the Caribbean region and draws upon desalination plant case studies in St. Martin and San Andres...

This ZDD technology involves the use of EDM to concentrate two streams of the RO concentrate, one CaSO4 rich and one NaCl rich. These streams are then combined to precipitate out gypsum. This stream is then recycled back to the RO feed. This method has shown to increase brackish water RO recoveries from 75% to 99%....

Wastewater from a petroleum refinery is conventionally treated with DAF, activated sludge, and two stages of clarification before being discharged to the environment. Rather than discharging the waste to the environment MF membranes and RO membranes were added to the treatment train in order to reuse the wastewater for boiler make-up and other refi...

Ceramic membranes combines with PAC can be an effective method at removing TOC; this reducing DBPs and controlling taste and odor issues. A pilot using a ceramic membrane included pretreatment with PAC and coagulant. The pretreatment resulted in a TOC removal of up to 80%....

The paper describes two phases of pilot testing to demonstrate that ZDD technology successfully achieved the water treatment goals at Hilmar Cheese. By combining RO and EDM technologies, the scaling concerns prevalent with a conventional RO treatment approach (calcium phosphate, calcium carbonate, silica) were eliminated....

Discusses the use of ceramic microfiltration membranes in oil and gas production, including overview of ceramic technology, current use in oil recovery, and key design issues and pretreatment. Includes case studies of produced water treatment with operating data and water quality....

Sustainability or the ability to meet the needs of the present without compromising the ability of future generations to meet their own needs is an important consideration for any project. The need to achieve a sustainable design means that we need to evaluate the circumstances where resource recovery makes the most sense. Membrane systems such as ...

Paper compares conventional and membrane pre-treatment options prior to nanofiltration water treatment to determine their relative effectiveness in controlling membrane fouling. The study was performed on a pilot scale at the Choisy-le-Roi Drinking Water Treatment Plant near Paris, France....

Paper focuses on several membrane-based treatment approaches that are aimed at achieving water recoveries greater than 90% to maximize yield while minimizing impacts from waste disposal. Technologies including reverse osmosis, nanofiltration, electrodialysis and electrodialysis metathesis were evaluated. The study confirms that selection of a suita...

This study compares the performance of two nanofiltration (NF) membranes and two antiscalants injected upstream of the NF system. The pilot unit is installed at the Choisy-le-Roi drinking water treatment plant (DWTP) located in the suburbs of Paris, France on behalf of the Syndicat des Eaux d?Ile de- France (SEDIF). This DWTP treats river water un...

Ideal applications for ceramic membranes include those in which the feed consists of emulsifed oily wastewaters at elevated temperatures. Select oily wastewater treatment applications will be desribed for both upstream and downstream oil and gas operations. Case studies will be presented in which the efficacy and resultant benefits of ceramic mem...

In a world where resources are dwindling, in Veolia we have found the opportunity to help our customers optimize energy costs through Refurbish of Reverse Osmosis desalination process; in this presentation we make a summary of success stories in this regard....

Many power/steam generation plants still rely on the traditional ion-exchange technology to treat the demineralized water for boiler make-up water. RO is a new technology showing a great deal of advantages and significant growth in the industry, but the full replacement cost will be costly. Veolia Grays Ferry has conducted a comprehensive alternati...

Membrane Bioreactor (MBR) technology is a well-established means of enabling the reuse of wastewater and is an ideal technology for potable water reuse due to the robust pathogen reduction, ability to enable cost savings for end users and the water quality produced for direct feed to downstream unit operations. Despite several successful applicatio...

Membrane Gravity Filtration (MGF) is an application for retrofitting gravity media filters using ultrafiltration membranes. It combines the simple operation of a media filter with the superior treated water quality of a UF membrane. MGF is best suited for applications where customers need better turbidity removal, a barrier to pathogens, or need ...