Anaerobic and aerobic coupled pneumatic lift type circulation biochemical reactor, and method for treating wastewater of chemical fiber

Abstract

This invention discloses an anaerobic/aerobic coupling airlift loop bioreactor and method for treating chemical fiber wastewater. In the column of the bioreactor there are an outer flow-guiding cylinder and an inner flow-guiding cylinder. The outer flow-guiding cylinder surrounds the inner flow-guiding cylinder. An outer gas distributor and an inner gas distributor are fixed at the bottom of the column. The bottom of the outer flow-guiding cylinder is sheathed with the outer gas distributor. The inner gas distributor is fixed at the inner bottom of the inner flow-guiding cylinder. The method utilizes the bioreactor for biochemical treatment of chemical fiber wastewater. Compressed air is introduced into the bioreactor so that the liquid in the flow-guiding cylinders moves upward, therefore large circulation is formed between the two flow-guiding cylinders, and anaerobic treatment and aerobic treatment are coupled. Wastewater treated can satisfy discharge standards. The method has such advantages as easy operation, convenient management, good anaerobic/aerobic effect, and good biochemical treatment effect, and is suitable for industrial application.

Description

technical field [0001] The invention belongs to the fields of biochemical technology and environmental protection, and in particular relates to an anaerobic-aerobic coupled air-lift circulation biochemical reactor and a chemical fiber wastewater treatment method. Background technique [0002] Water environment issues have become the focus of attention in today's society, and water pollution and governance have always been a hot topic for scientific researchers. With the rapid development of the chemical fiber industry, the discharge of chemical fiber wastewater is increasing year by year. It is preliminarily estimated that the annual discharge of chemical fiber wastewater in my country is more than 12 million tons. If the chemical fiber waste water is discharged directly without treatment, it will seriously pollute the water environment of our country, and our country's water resources are in short supply, and the situation is very grim. On the other hand, it is also an imp...

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Problems solved by technology

Document 4) Wang Gangduo, Tao Yuzhen, Zhang Weidong, Tang Xian'e, Lin Ruicun. Experimental study on renal toxicity of mixed solution of toluene and xylene. Journal of Health Toxicology, 1998, 12(1): 53-54 reported the use of chemical coagulation and electrochemical Chemical fiber wastewater treatment; Document 5) Yu Jianle, Wang Zhiping, Chang Yuanxun. The damage of toluene to the central nervous system. Foreign Medicine: Hygienic Volume, 1998, 25(3): 135-137 reported the use of A/O 2 Treatment of chemical fiber wastewater; Document 6) Yan Xiufeng, Wang Lin, Huang Xingpei. Toxicity test of methanol to fish. Occupational Health and Disease, 2003, 02: 130 reported the use of oxidation ditch method to treat chemical fiber wastewater; Document 7) Song Haiyu, Wang Wei, Zhang Chunyan. Pilot study on the treatment of chemical fiber wastewater by biofilm A/O system. Heilongjiang Petrochemical Industry, 1998, (2) and Document 8) F.Gebara.Activated sludge biofilm wastewater treatment system.Wat.Res., 1999, 33 (1): 230-238 reported the use of biofilm method to

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