title: Operational aspects of SO2removal and microbial population in an integrated-bioreactor with two bioreaction zones.
abstract: An integrated-bioreactor, which consisted of a suspended zone and an immobilized zone, was applied to treat gases containing SO2. The removal of SO2in suspended zone differed slightly from that in immobilized zone. The influences of operational aspects such as SO2load, temperature, and pH on integrated-bioreactor performance and bacterial community composition were investigated. The synergistic action of the two zones led to effective reduction of SO2, and the total removal efficiencies with the inlet concentration of 91-117 mg/m3, were over 85 % in steady state. Paenibacillus sp. and Lysinibacillus sp. dominated both zones as desulfurization bacteria. Results of polymerase chain reaction-denaturing gradient gel electrophoresis followed by clone library analysis indicated that temporal shifts in bacterial community composition in both zones developed differently. Differences in the concentration of introduced SO2and supported mode of microorganisms for survival, confirmed that bacterial community composition and abundance significantly differed among individual zones.
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. leel@rcees.ac.cn.|University of Chinese Academy of Sciences, Beijing, 100049, China. leel@rcees.ac.cn.
authors: Lin
authors: http://orcid.org/0000-0002-5205-0259
authors: L
authors: Li
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors: Kaixiong
authors: K
authors: Yang
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors: Jian
authors: J
authors: Lin
authors: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors: Junxin
authors: J
authors: Liu
mesh_terms: D019149:Bioreactors; D056507:Paenibacillus / Q000254:growth & development*; D013458:Sulfur Dioxide / Q000378:metabolism*
chemical_list: D013458:Sulfur Dioxide
keywords: Integrated-bioreactor; Microbial community; Operational aspects; PCR-DGGE; Sulfur dioxide