title: Fast start-up and stable performance coupled to sulfate reduction in the nitrobenzene bio-reduction system and its microbial community.
abstract: Three laboratory-scale sequence batch reactors were set up in this study. It was found that a successfully established sulfate-reducing system - operating at COD/SO42- ratio of 5.0 - could speed up the start-up process, leading to a high performance. It took about 100 and 60 days, respectively, for a non-sulfate-reducing system and a sulfate-reducing control system to achieve stable and high removal of NB. However, it maintained a complete NB removal in sulfate-reducing system throughout the study. Rapid and stable NB reduction was coupled to the on-going sulfate reducing process. Denaturing gradient gel electrophoresis profile demonstrated that the predominant bacterial groups in the non-sulfate-reducing system and the sulfate-reducing control system were affiliated to Deltaproteobacterium and Acinetobacter, while in the sulfate-reducing system were sulfate-reducing and sulfur-oxidizing bacteria.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
authors.forename: Jingang
authors.initials: J
authors.lastname: Huang
authors.forename: Yue
authors.initials: Y
authors.lastname: Wen
authors.forename: Ning
authors.initials: N
authors.lastname: Ding
authors.forename: Yue
authors.initials: Y
authors.lastname: Xu
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhou
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D059013:Microbial Consortia / Q000502:physiology*; D009578:Nitrobenzenes / Q000302:isolation & purification* / Q000378:metabolism*; D010084:Oxidation-Reduction; D013431:Sulfates / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D009578:Nitrobenzenes; D013431:Sulfates; C036077:nitrobenzene