title: Microbial adaptation to biodegrade toxic organic micro-pollutants in membrane bioreactor using different sludge sources.
abstract: Biodegradation of toxic organic micro-pollutants in municipal solid waste (MSW) leachate by membrane bioreactor (MBR) was investigated. The MBR systems were seeded with different sludge sources, one was from a pilot-scale MBR system treating MSW leachate and the other was from an activated sludge sewage treatment plant. The biodegradation of BPA, 2,6-DTBP, BHT, DEP, DBP and DEHP, DCP and BBzP, by sludge from both reactors were found improved with time. However, enhanced biodegradation of micro-pollutants was observed in MBR operated under long sludge age condition. Bacterial population analyses determined by PCR-DGGE revealed the development of phenol and phthalate degrading bacteria consortium in MBR sludge during its operation.
authors.affiliation: Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand.
authors.forename: Jarungwit
authors.initials: J
authors.lastname: Boonnorat
authors.affiliation: Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand. Electronic address: fengccc@ku.ac.th.
authors.forename: Chart
authors.initials: C
authors.lastname: Chiemchaisri
authors.affiliation: Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand.
authors.forename: Wilai
authors.initials: W
authors.lastname: Chiemchaisri
authors.affiliation: Environmental Science Center, University of Tokyo, Tokyo 113, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Yamamoto
mesh_terms: D000222:Adaptation, Physiological; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D058645:Denaturing Gradient Gel Electrophoresis; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000302:isolation & purification; D016133:Polymerase Chain Reaction; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D008567:Membranes, Artificial; D009930:Organic Chemicals; D012722:Sewage; D014874:Water Pollutants, Chemical
keywords: Bacterial community; Membrane bioreactor; Micro-pollutants; Microbial adaptation; PCR–DGGE