title: Biodegradation of geosmin in drinking water by novel bacteria isolated from biologically active carbon.
abstract: Three strains of Gram-negative bacteria capable of removing geosmin from drinking water were isolated from biologically active carbon and identified to be Chryseobacterium sp., Sinorhizobium sp. and Stenotrophomonas sp. based on physio-biochemistry analysis and 16S rRNA gene sequence analysis. Removal efficiencies of 2 mg/L geosmin in mineral salts medium were 84.0%, 80.2% and 74.4% for Chryseobacterium sp., Sinorhizobium sp. and Stenotrophomonas sp., respectively, while removal efficiencies of 560 ng/L geosmin in filter influent were 84.8%, 82.3% and 82.5%, respectively. The biodegradation of geosmin was determined to be a pseudo first-order reaction, with rate constants at 2 mg/L and 560 ng/L being 0.097 and 0.086 day(-1), 0.089 and 0.084 day(-1), 0.074 and 0.098 day(-1) for the above mentioned degraders, respectively. The biomass of culture in the presence of geosmin was much higher than that in the absence of geosmin.
authors.affiliation: Department of Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. zhoubeihai@sina.com
authors.forename: Beihai
authors.initials: B
authors.lastname: Zhou
authors.forename: Rongfang
authors.initials: R
authors.lastname: Yuan
authors.forename: Chunhong
authors.initials: C
authors.lastname: Shi
authors.forename: Liying
authors.initials: L
authors.lastname: Yu
authors.forename: Junnong
authors.initials: J
authors.lastname: Gu
authors.forename: Chunlei
authors.initials: C
authors.lastname: Zhang
mesh_terms: D001419:Bacteria / Q000235:genetics / Q000302:isolation & purification*; D001673:Biodegradation, Environmental; D018533:Biomass; D002606:Charcoal / Q000737:chemistry*; D007700:Kinetics; D009284:Naphthols / Q000302:isolation & purification*; D010802:Phylogeny; D014881:Water Supply
chemical_list: D009284:Naphthols; D002606:Charcoal; C001278:geosmin