title: Removals of phenolic compounds and phthalic acid esters in landfill leachate by microbial sludge of two-stage membrane bioreactor.
abstract: Removals of bisphenol A (BPA), 2,6-di-tert-butylphenol (2,6-DTBP), 2,6-di-tert-butyl-4methylphenol (BHT), di-ethyl phthalate (DEP), di-butyl phthalate (DBP) and bis (2-ethylhexyl) phthalate (DEHP) were monitored in two-stage membrane bioreactor (MBR) by operating under no sludge wastage condition for 500 days. Those emerging contaminants were removed by 99.5%, 99.0%, 99.5%, 97.9%, 96.8% and 95.7% under long term operation in MBR without reaching maximum adsorption capacity of sludge. Biodegradation was the main mechanism for their removals in MBR systems and the microbial activities were enhanced by long sludge age operating condition. The removals of those compounds by microbial sludge in MBR by adsorption and combined (adsorption & biodegradation) mechanisms were well explained by pseudo-second order and first order kinetics, respectively.
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: D019149:Bioreactors / Q000382:microbiology*; D004952:Esters; D007700:Kinetics; D008567:Membranes, Artificial; D010636:Phenols / Q000032:analysis / Q000302:isolation & purification*; D010795:Phthalic Acids / Q000032:analysis / Q000302:isolation & purification*; D012722:Sewage / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D060753:Water Quality
chemical_list: D004952:Esters; D008567:Membranes, Artificial; D010636:Phenols; D010795:Phthalic Acids; D012722:Sewage; D014874:Water Pollutants, Chemical; C032279:phthalic acid
keywords: Emerging contaminants; Membrane bioreactor; Municipal solid waste leachate; Phenolic compounds; Phthalic acid esters