Technology of treating coking wastewater by biomembrance process

Abstract

The invention relates to a technology of treating coking wastewater by biomembrance process, belongs to the field of environmental protection and difficult degradable industrial wastewater treatment, is mainly used to treat coking wastewater, can also be used to treat high COD and high ammonia nitrogen industrial wastewater and can realize that COD can be removed effectively and denitrification can be carried out effectively. The reactors used by the invention comprise an anaerobic bacteria filter, an aerobic biological fluidized bed, an anoxic biofilter and a settling pond. The technology is that the pretreated coking wastewater flows through the anaerobic bacteria filter for hydrolysis acidification, the aerobic biological fluidized bed for oxidation, then the anoxic biofilter for filtration, the settling pond for removing suspended matter and the treated water generated in the settling pond is directly discharged and part of the treated water flows back to the anaerobic bacteria filter. The COD removal rate of effluent can be above 95%, and the other indexes can all reach the primary standard of the national standard (GB8978-1996) for effluent discharge. The treatment technology has higher hydraulic loading and resistance shocking and lower floor area.

Description

technical field [0001] The invention relates to a wastewater treatment process, which belongs to the field of environmental protection and refractory industrial wastewater treatment. It mainly treats coking wastewater and is also suitable for treating industrial wastewater with high COD and high ammonia nitrogen, and can realize efficient removal of COD and nitrogen removal. technical background [0002] Coking wastewater is refractory biodegradable high-concentration toxic organic wastewater produced during coke refining or gas production, mainly from coking plants in the iron and steel metallurgy and coking industries. Coking wastewater mainly contains ammonia nitrogen (NH 3 -N), cyanide, phenolic compounds, polycyclic aromatic compounds, nitrogen, oxygen, sulfur-containing heterocyclic compounds and aliphatic compounds and other pollutants have "three-caused" effects and pose a huge threat to human health and the ecological environment . In addition to the complex compo...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the high COD of the coking wastewater effluent in the existing biological treatment, the NH 3 -N can not be effectively removed, and it is difficult to meet the standard. To provide an efficient, stable, low-cost, and easy-to-manage biological treatment process for coking wastewater, so that coking wastewater can meet the relevant national discharge standards after treatment, and solve the problem of coking wastewater in my country. Status of processing

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