title: Removal of phenols, thiocyanate and ammonium from coal gasification wastewater using moving bed biofilm reactor.
abstract: A laboratory-scale moving bed biofilm reactor (MBBR) with a volume of 4 L was used to study the biodegradation of coal gasification wastewater. Maximum removal efficiencies of 81%, 89%, 94% and 93% were obtained for COD, phenols, SCN(-) and NH(4)(+)-N, respectively. NO(2)(-)-N accumulation induced increase of effluent COD concentration when the hydraulic residence time (HRT) decreased. Phenols removal was not affected when the HRT decreased from 48 to 32 h. Effluent SCN(-) and NH(4)(+)-N concentration increased with the decrease of the HRT, and decreased gradually when the HRT returned to 48 h. Batch experiments were carried out to study performance of the suspended and attached growth biomass in the MBBR.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Hui-qiang
authors.initials: HQ
authors.lastname: Li
authors.forename: Hong-jun
authors.initials: HJ
authors.lastname: Han
authors.forename: Mao-an
authors.initials: MA
authors.lastname: Du
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
mesh_terms: D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors; D003031:Coal; D058465:Nitrification; D010636:Phenols / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000378:metabolism; D013861:Thiocyanates / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
chemical_list: D003031:Coal; D010636:Phenols; D000644:Quaternary Ammonium Compounds; D013861:Thiocyanates; D014874:Water Pollutants, Chemical; C031760:thiocyanate