biofouling Articles

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Biofouling Plant Performance

by MASAR Technologies, Inc.  (Jun. 17, 2015)

The City of Clifton, Colorado, designed and built a 2.4 million gallons per day nanofiltration plant to treat Colorado river water and supply the city and nearby areas with drinking water. The plant was partially started in September 1997 with NF Skid 1. It was shutdown in the Spring of 1998 due to low river TDS. The plant was re-started in August ...

Integrated approach for biofouling control

by IWA Publishing  (Dec. 1, 2010)

Despite extensive research efforts, past and present strategies to control biofouling problems in spiral-wound nanofiltration and reverse osmosis membranes have not been successful under all circumstances. Gaining insight in the biofouling process is a first necessity. Based on recent insights, an overview is given of 12 potential complementary ...

YWP Weinrich perspective on RO membrane biofouling reduction

by IWA Publishing  (Feb. 22, 2016)

Seawater desalination using reverse osmosis is an important part of a community’s water portfolio in coastal areas experiencing water scarcity. However, desalination using RO is expensive in part because of the costly challenges that arise from fouling on the RO membranes. Specifically, biological fouling emerged as the most poorly managed ...

Biofouling & Biomonitoring: Mussels help keep Mussels at Bay

by Grontmij - SWECO  (Jan. 1, 1999)

Untitled Document Dykes, shipwrecks, junk and just about anything else submerged in water is soon colonized by aquatic animals, particularly mussels. Unless something is ...

Bioregeneration of Spent Ion-Exchange Resin Loaded with Nitrate/Perchlorate and Biofouling Removal

by Water Environment Federation (WEF)  (Oct. 13, 2007)

A new process has been developed that regenerates perchlorate/nitrate-contaminated ionexchange resins (IX) biologically without requiring the use of brine. The process consists of directly contacting perchlorate/nitrate-loaded IX resin with a perchlorate/nitrate-reducing microbial culture under anoxic/anaerobic conditions leading to conversion of ...

Rapid novel test for the determination of biofouling potential on reverse osmosis membranes

by IWA Publishing  (Mar. 31, 2016)

A novel method was proposed to determine biofouling potential by direct analysis of a reverse osmosis (RO) membrane through fluorescence intensity analysis of biofilm formed on the membrane surface, thereby incorporating fouling tendencies of both feedwater and membrane. Evaluation of the biofouling potential on the RO membrane was done by ...

Mitigation of marine biofouling on tubes of open rack vaporizers using electromagnetic fields

by IWA Publishing  (Nov. 25, 2015)

This study quantitatively evaluates the antifouling action of the continuous physical treatment with electromagnetic fields (EMFs) of seawater used as heat exchanger fluid in an open rack vaporizer (ORV) pilot plant to reduce the growth of biofouling on external rib-tube surfaces. The results demonstrate that the biofilm adhered on the treated ...

Biofouling by bryozoans, Cordylophora and sponges in UK water treatment works

by IWA Publishing  (Jan. 1, 2011)

In recent years biofouling from native (bryozoans, sponges) and non-native (Cordylophora) animals has increased in UK water treatment works (WTW). A survey of six UK water companies and eight WTWs revealed that these taxa were more widespread and abundant than previously recognised. Primary problems related to the occlusion of underfloor nozzles ...

Application of the membrane fouling simulator to determine biofouling potential of antiscalants in membrane filtration

by IWA Publishing  (Mar. 1, 2010)

In treatment of groundwater with reverse osmosis, the applied antiscalant can significantly contribute to the formation of biofouling, especially when legislation enforces the use of biodegradable, phosphorous-free products. As an alternative to extensive piloting, the use of the membrane fouling simulator (MFS) is proposed here to assess the ...

Electrochlorination system: a unique method of prevention of biofouling in seawater desalination

by Inderscience Publishers  (Sep. 10, 2008)

Desalination plants require huge volumes of seawater for the generation of fresh water. Seawater contains large amounts of microbiological fluids which, when passed through the piping system, form biofouling in the inner surface of the pipeline, which results in the reduction of the flow rate of water without proper chemical treatment. Chlorine is ...

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