biofouling Articles

147 Results found
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Organics Monitoring: A Practical Guide

by GE Analytical Instruments  (Apr. 6, 2015)

Preventing product loss, lowering waste treatment costs, and reducing system maintenance and energy consumption through organics monitoring in the chemical, refining, food, and wastewater treatment industries. Summary Process water and steam condensate contamination includes organic, inorganic, and biological components. Sources of organic ...

Membrane biofouling mechanism in an aerobic granular reactor degrading 4-chlorophenol

by IWA Publishing  (Apr. 24, 2014)

The membrane fouling of an aerobic granular reactor coupled with a submerged membrane in a sequencing batch reactor (SBR) was evaluated. The fouling analysis was performed by applying microscopy techniques to determine the morphology and structure of the fouling layer on a polyvinylidene fluoride membrane. It was found that the main cause of ...

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 ...

Engineered biofiltration for ultrafiltration fouling mitigation and disinfection by-product precursor control

by IWA Publishing  (Feb. 4, 2015)

A pilot-scale study was conducted to evaluate the impact of several biofiltration enhancement strategies in terms of organic removal to reduce disinfection by-product (DBP) formation potential and mitigate ultrafiltration (UF) fouling. Strategies included nutrient addition (nitrogen and phosphorus) to optimize metabolic degradation of organics, ...

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 ...

The effect of mixed liquor suspended solids (MLSS) on biofouling in a hybrid membrane bioreactor for the treatment of high concentration organic wastewater

by IWA Publishing  (Jan. 1, 2011)

Biofouling is a crucial factor in membrane bioreactor (MBR) applications, particularly for high organic loading operations. This paper reports a study on biofouling in an MBR to establish a relationship between critical flux, Jc, mixed liquor suspended solids (MLSS) (ranging from 5 to 20 g L−1) and volumetric loading rate (6.3 kg COD m−3 h−1) of ...

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 ...

Tensile deformation of polytetrafluoroethylene hollow fiber membranes used for water purification

by IWA Publishing  (Oct. 20, 2014)

The tensile deformation behavior of polytetrafluoroethylene (PTFE) hollow fiber membranes is studied. PTFE membranes at present have sub-micron pores with an open cell structure, which plays a critical role in water purification. One of the main challenges in water purification is that the pore structure becomes covered with biofouling, leading ...

Industrial cooling water fouling by Dreissenidae

by Aquator B.V.  (Feb. 28, 2012)

Together with the cooling water, a wide range of living organisms is entrained into cooling water systems, which can readily colonise the available surfaces in the system. Growth conditions in the cooling water system often are ideal for sessile organisms: the steady water flow assures abundance of nutrients and oxygen, while access for predators ...

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