Membrane-aerated biofilm reactor for the removal of 1,2-dichloroethane by Pseudomonas sp. strain DCA1
article
A membrane-aerated biofilm reactor (MBR) with a biofilm of Pseudomonas sp. strain DCA1 was studied for the removal of 1,2-dichloroethane (DCA) from water. A hydrophobic membrane was used to create a barrier between the liquid and the gas phase. Inoculation of the MBR with cells of strain DCA1 grown in a continuous culture resulted in the formation of a stable and active DCA-degrading biofilm on the membrane. The maximum removal rate of the MBR was reached at a DCA concentration of approximately 80 μM. Simulation of the DCA fluxes into the biofilm showed that the MBR performance at lower concentrations was limited by the DCA diffusion rate rather than by kinetic constraints of strain DCA1. Aerobic biodegradation of DCA present in anoxic water could be achieved by supplying oxygen solely from the gas phase to the biofilm grown on the liquid side of the membrane. As a result, direct aeration of the water, which leads to undesired coagulation of iron oxides, could be avoided. © Springer-Verlag 2004. Chemicals / CAS: 1,2 dichloroethane, 107-06-2; iron oxide, 1332-37-2; oxygen, 7782-44-7; water, 7732-18-5; Chlorides; ethylene dichloride, 107-06-2; Ethylene Dichlorides; Membranes, Artificial; Water Pollutants, Chemical
Topics
1,2 dichloroethaneiron oxideoxygenwaterbioreactoraerationbacterial growthbacterial strainbacterium culturebiofilm reactorcontrolled studyculture mediumdiffusiongashydrophilicityinoculationliquidmicrobial degradationnonhumanPseudomonasBiodegradation, EnvironmentalBiofilmsBioreactorsChloridesComputer SimulationEthylene DichloridesKineticsMembranes, ArtificialPseudomonasWater Pollutants, ChemicalPseudomonasPseudomonas sp.
TNO Identifier
237799
ISSN
01757598
Source
Applied Microbiology and Biotechnology, 64(5), pp. 718-725.
Pages
718-725
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