biofouling Articles

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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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

Da Lin Power Station Taiwan-HydroPath provides a solution for Biofouling in Power Station

by Environmental Controls & Methods, Inc. (ECMI)  (Jun. 1, 2007)

The Site: Seawater is used as a coolant in the heat exchanger. Since the temperature inside the exchanger was below 50°C, scale was not a big problem. The problem was biofouling. lnvestigations have shown that a layer of 250 microns thick microfouling can reduce heat transfer efficiency by up to 25°c. Microfouling also reduces water flow and ...

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