title: Treatment of petrochemical wastewater by microaerobic hydrolysis and anoxic/oxic processes and analysis of bacterial diversity.
abstract: Microaerobic hydrolysis-acidification (MHA)-anoxic-oxic (A/O) processes were developed to treat actual petrochemical wastewater. The results showed that the overall COD removal efficiency was 72-79% at HRT=20h, and MHA accounted for 33-42% of COD removal, exhibiting good efficiency of acidogenic fermentation. Ammonium removal was more than 94%. The main pollutants in the influent were identified to be benzene, ketone, alcohols, amine, nitrile and phenols by GC-MS, and the majority of pollutants could be removed by MHA-A/O treatment. Proteobacteria was the most dominant bacteria in the system, accounting for more than 55% of the reads. The predominant genera in MHA, anoxic and oxic reactors were Anaerolineaceae and Sulfuritalea, Lactococcus and Blastocatella, and Saprospiraceae uncultured and Nitrosomonadaceae, respectively. This treatment system exhibited good performance in degrading the complex compounds in the petrochemical wastewater.
authors.affiliation: School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.affiliation: School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China.
authors.forename: Panpan
authors.initials: P
authors.lastname: Xiong
authors.affiliation: Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China.
authors.forename: Pengyuan
authors.initials: P
authors.lastname: Ding
authors.affiliation: Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, Tsinghua University, Beijing 100084, PR China.
authors.forename: Libing
authors.initials: L
authors.lastname: Chu
authors.affiliation: Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, Tsinghua University, Beijing 100084, PR China. Electronic address: wangjl@tsinghua.edu.cn.
authors.forename: Jianlong
authors.initials: J
authors.lastname: Wang
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D001419:Bacteria; D019149:Bioreactors / Q000382:microbiology*; D006868:Hydrolysis; D059013:Microbial Consortia; D043369:Nitrosomonadaceae / Q000302:isolation & purification; D059392:Petroleum Pollution / Q000517:prevention & control*; D020560:Proteobacteria / Q000302:isolation & purification; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Microaerobic hydrolysis; Microbial community; Petrochemical wastewater; Wastewater treatment