4.5 Article Proceedings Paper

The membrane biofilm reactor: the natural partnership of membranes and biofilm

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WATER SCIENCE AND TECHNOLOGY
卷 53, 期 3, 页码 219-225

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I W A PUBLISHING
DOI: 10.2166/wst.2006.096

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biofilm; hydrogen; membrane; microbial reduction; nutrient removal; oxidised contaminants

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Many exciting new technologies for water-quality control combine microbiological processes with adsorption, advanced oxidation, a membrane or an electrode to improve performance, address emerging contaminants or capture renewable energy. An excellent example is the H-2-based membrane biofilm reactor (MBfR), which delivers H-2 gas to a biofilm that naturally accumulates on the outer surface of a bubbleless membrane. Autotrophic bacteria in the biofilm oxidise the H-2 and use the electrons to reduce NO3-, ClO4- and other oxidised contaminants. This natural partnership of membranes and biofilm makes it possible to gain many cost, performance and simplicity advantages from using H-2 as the electron donor for microbially catalysed reductions. The MBfR has been demonstrated for denitrification in drinking water; reduction of perchlorate in groundwater; reduction of selenate, chromate, trichloroethene and other emerging contaminants; advanced N removal in wastewater treatment and autotrophic total-N removal.

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