American Journal of Water Science and Engineering
Volume 5, Issue 2, June 2019, Pages: 96-104
Received: Jun. 5, 2019;
Accepted: Jul. 2, 2019;
Published: Jul. 12, 2019
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Jianwei Zhu, Hangzhou Institute of Environmental Protection, Chinese Coal Technology & Engineering Group, Hangzhou, China
Bin Wu, Hangzhou Institute of Environmental Protection, Chinese Coal Technology & Engineering Group, Hangzhou, China
Based on a large number of experimental data, this paper puts forward a three-stage hypothesis of biochemical degradation of coking wastewater. And studies on the biochemical degradation kinetics in various stages through laboratory experiments have been made. In these studies, a new concept has been proposed, that of substances present in coking wastewater that can be biochemically treated to produce ammonia nitrogen. And this class of substances, we define and call BN for short. BN’s meaning is to produce ammonia nitrogen in the process of biochemical treatment. The relationship between COD, the substances that can biotreatedly produce ammonia nitrogen (BN), ammonia nitrogen and time in biochemical degradation is revealed. In the first stage of biochemistry is the removal of a large amount of organic pollutants, so that the strong smell of the wastewater is removed while most of the COD is removed. In the second stage of biochemistry is the removal of substances that produce ammonia nitrogen (BN). These increases the ammonia nitrogen in the wastewater. In the third stage of biochemistry is degradation of ammonia nitrogen, so that ammonia nitrogen meets the emission standard. The mathematical model of biochemical degradation kinetics is proposed. The mathematical model consists of 12 formulas. The first stage has one formula, the second stage has five formulas, and the third stage has six formulas. The hydraulic retention time of biochemical treatment tank at different stages can be calculated by these formulas. Based on the proposed mathematical model, this paper illustrates the significance of the three-stage theory to the design and operation of the biochemical treatment of coking wastewater. At the same time, we can see the importance of the new concept of BN.
Study on the Mechanism of Biotreatment of Coke-making Wastewater, American Journal of Water Science and Engineering.
Vol. 5, No. 2,
2019, pp. 96-104.
The preparation group of the standards for the emission of pollutants in coking industry (2010). the Preparation Document of the Standards for the Emission of Pollutants in Coking Industry (Chinese). Beijing: China Environmental Science Press.
Kong Lingdong, and Jiang Chengchun (1994). Treatment of coking wastewater and determination of organic pollutants in wastewater (Chinese). Environmental engineering. 12(4), 3.
Kim Young Mo, Park Donghee, Lee Dae Sung, et al. (2008). Inhibitory effects of toxic compounds on nitrification process for cokes wastewater treatment. Journal of Hazardous Materials, 152(3), 915-921.
Wang Chunrong, Gao Zhenfeng, Wang Jianbing, Cheng Fanglin (2013). Research on the phenol-degradation strain from coking wastewater treatment system and its kinetics. Industrial Water Treatment (Chinese), 33(6), 25-28.
Dev Raj Joshi, Yu Zhang, Zhe Tian, Yingxin Gao, Min Yang, (2016). Performance and microbial community composition in a long-term sequential anaerobic-aerobic bioreactor operation treating coking wastewater. Applied Microbiology and Biotechnology, 100(18), 8191–8202.
PENG Pai, ZHU Xi-kun, LI Xiao-ming, YANG De-yu, LI Li, (2016). Pilot test on the application of environmental sludge bacteria agent to coking wastewater. Environmental Engineering (Chinese), 34(6), 41-45.
Cui Chongwei, Ma Fang, Zhang Yanmin, et al. (2002). Investigation into the process modification of Hayi coal gasification wastewater treatment plant. Journal of Harbin University of Civil Engineering and Architecture (Chinese), 35(5), 26-29.
Li Huiqiang, Han Hongjun, Du Maoan, et al. (2011). Removal of phenols, thiocyanate and ammonium from coal gasification wastewater using moving bed biofilm reactor. Bioresource Technology, 102(7), 4667-4673.
Zhao Qian, Han Hongjun, Hou Baolin, et al. (2014). Nitrogen removal from coal gasification wastewater by activated carbon technologies combined with short-cut nitrogen removal process. Journal of Environmental Sciences, 26(11), 2231-2239.
Zhang M, Jin T N, Qian Y, et al. (1997). Comparison Between Anaerobic-anoxic-oxic and Anoxic-oxic System for Coke Plant Wastewater Treatment. Journal of Environment Engineering, 123(9), 876-883.
Zhou Xin, Li Yaxin, Zhao Yi, et al. (2013). Pilot-scale anaerobic/anoxic/oxic/oxic biofilm process treating coking wastewater. Journal of Chemical Technology and Biotechnology, 88(2), 305-310.
Maranón E, Vázquez I, Rodríguez J, et al. (2008). Treatment of coke wastewater in a sequential batch reactor (SBR) at pilot plant scale. Bioresource Technology, 99(10), 4192-4198.
LIU Cui-ping, ZHAO Jie, YUE Ying-li, (2016). The Technology Application of A1-A2-O in the Treatment of Coking Waste Water. Science and Technology of Baotou Steel (Chinese), 42(6), 88-91.
Jin Tao Su Zhiguang Ding Zuo, (2016). Design and operation of coking waste water treatment plant. Fuel & Chemical Processes (Chinese), 47(1), 57-59.
Ramalho R. S. (1977). Introduction to Wasteater Treatment Processes. New York: Academic Press, Inc. Ltd.
Mandt Mikkel G., and Bell Bruce A. (1982). Oxidation Ditches in Wastewater Treatment. Michigan: Ann Arbor Science Publishers.
Lawrence, A. W., and McCarthy, P. L. (1970). Unified Basis for Biological Treatment Design and Operation. J. Sanit. Eng. Div. 96, 757.
Eckenfelder, W. Wesley, Jr, and Musterman, J. L., Jiang, Wenchuo, translator (1997). Activated Sludge Treatment for Industrial Wastewater (Chinese). Beijing: China Construction Industry Press.
Eckenfelder, W. Wesley., Jr, (1989). Industrial Water Pollution Control. New York: McGraw-Hill Book Co.