Bioaugmentation with isolated strains for the removal of toxic and refractory organics from coking wastewater in a membrane bioreactor.
The bioaugmentation strains for phenol, pyridine, quinoline, carbazole, and naphthalene degradation were employed to treat coking wastewater in a membrane bioreactor (MBR). The results showed that the bioaugmented MBR was much better in pollutant removal than that of the control MBR with conventional activated sludge. Compared to the control MBR, the bioaugmented MBR displayed an additional 3.2 mg/L of phenol, pyridine, quinoline, naphthalene and carbazole in total by the addition of the degrading strains. Also, about 10 % of the chemical oxygen demand in the effluent was further removed by the bioaugmentation. The pyrosequencing analysis of the sludge in the MBRs revealed that the microbial community shifted in response to the addition of the degrading strains. The diversity of the microbial community increased during the bioaugmentation, and some bacterial taxa favorable to the removal of toxic and refractory pollutants appeared in the bioaugmented MBR. The results indicated that the use of high-efficiency bacteria was a feasible method for industrial coking wastewater treatment.
College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China.
Xiaobiao
X
Zhu
Key Laboratory of Water Science and Technology of Zhejiang Province, Jiaxing, 314006, People's Republic of China.
Rui
R
Liu
School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China.
Cong
C
Liu
School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China. chenlj@mail.tsinghua.edu.cn.|Key Laboratory of Water Science and Technology of Zhejiang Province, Jiaxing, 314006, People's Republic of China. chenlj@mail.tsinghua.edu.cn.
Lujun
L
Chen
D001419:Bacteria / Q000145:classification / Q000302:isolation & purification / Q000378:metabolism*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D003077:Coke / Q000382:microbiology*; D012722:Sewage / Q000382:microbiology*; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*
D003077:Coke; D012722:Sewage; D062065:Wastewater
Bioaugmentation; High-efficiency bacteria; MBR; Microbial community