In this study, petrochemical secondary effluent was treated by a 55 cm diameter pilot-scale biological aerated filter (BAF) with a media depth of 220 cm. Volcanic rock grains were filled as the BAF media. Median removal efficiency of chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) was 29.35 and 57.98%, respectively. Moreover, the removal profile of the COD, NH3-N, total nitrogen and total organic carbon demonstrated that the filter height of 140 cm made up to 90% of the total removal efficiency of the final effluent. By gas chromatography–mass spectrometry, removal efficiencies of 2-chloromethyl-1,3-dioxolane, and benzonitrile, indene and naphthalene were obtained, ranging from 30.12 to 63.01%. The biomass and microbial activity of the microorganisms on the filter media were in general reduced with increasing filter height, which is consistent with the removal profile of the contaminants. The detected genera Defluviicoccus, Betaproteobacteria_unclassified and the Blastocatella constituted 1.86–6.75% of the identified gene, enhancing the COD and nitrogen removal in BAF for treating petrochemical secondary effluent.
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Research Article|
January 28 2016
Treatment of petrochemical secondary effluent by an up-flow biological aerated filter (BAF) Available to Purchase
L. Y. Fu;
L. Y. Fu
1School of Environment, Tsinghua University, Beijing 100084, China
3Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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C. Y. Wu;
C. Y. Wu
2State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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Y. X. Zhou;
2State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
E-mail: [email protected]
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J. E. Zuo;
J. E. Zuo
1School of Environment, Tsinghua University, Beijing 100084, China
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Y. Ding
Y. Ding
4College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
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Water Sci Technol (2016) 73 (8): 2031–2038.
Article history
Received:
November 10 2015
Accepted:
December 15 2015
Citation
L. Y. Fu, C. Y. Wu, Y. X. Zhou, J. E. Zuo, Y. Ding; Treatment of petrochemical secondary effluent by an up-flow biological aerated filter (BAF). Water Sci Technol 27 April 2016; 73 (8): 2031–2038. doi: https://doi.org/10.2166/wst.2016.049
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