High-efficient treatment method for biologically-enhanced coking waste water for biological membrane

Abstract

The invention relates to a high-efficient treatment method for biologically-enhanced coking waste water for a biological membrane. The method comprises treating coking waste water by adopting an anaerobic organism filter and a three-phase aerobic biological circulating fluidized bed coupling process, wherein the method includes a membrane formation period and a normal running period; and in the membrane formation period, a membrane supporting carrier is firstly added into a reactor in the anaerobic organism filter and in the three-phase aerobic biological circulating fluidized bed coupling process, then Comamonas testosteroni CGMCC N0.4630 is fed for membrane formation, and an ecological island system is formed in the system after completion of film formation. Through the treatment of the process, the COD removal rate of the coking waste water can reach more than 94 percent, the NH3-N removal rate reaches more than 98 percent, the outlet water can achieve the first-level drainage standard and recycling standard of national sewage drainage standard (GB9878-1996), and 100 percent recycling of the waste water can be achieved.

Description

Technical field [0001] The invention relates to an efficient treatment method for biofilm bio-enhanced coking wastewater, which belongs to the field of environmental protection and refractory industrial wastewater treatment, and is particularly suitable for coking wastewater, and is also suitable for processing industrial wastewater with high COD and high ammonia nitrogen, and can achieve efficient removal COD and efficient denitrification. technical background [0002] Coking wastewater is a high-concentration toxic organic wastewater that is difficult to biodegrade in the process of making coke or gas, and it mainly comes 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 the "three causes" effect, and pose a great threat to h...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing biological treatment of coking wastewater, combined with the relevant research and theory of predecessors, to provide a high-efficiency, stable, low-cost, and easy-to-manage biological treatment of coking wastewater, so that the coking wastewater can be treated It can meet the relevant national discharge standards and solve the current situation that my country's domestic coking wastewater is difficult to treat

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