Method for treating industrial waste water by using CASS (cyclic activated sludge system) process and tower earthworm ecological filter

Abstract

The invention discloses a method for treating industrial waste water by using a CASS (cyclic activated sludge system) process and a tower earthworm ecological filter. The method comprises the following steps of: removing suspended matters from waste water through a grate; feeding into an adjusting pond for adjusting the water quality and water amount of the waste water; introducing into a CASS pond for treating; draining waste water treated in the CASS pond into a middle water pond for adjusting the water amount; feeding into a one-stage or multi-stage serial tower earthworm ecological filters for further treatment; and draining water, wherein each stage of tower earthworm ecological filter consists of a cobblestone layer, a bluestone layer, a yellow sand layer and a soil layer containing earthworms form bottom to top in sequence. The method has the advantages of high organic matter degradation efficiency, high denitriding and phosphorous removing capabilities, high automation degree and low investment and running cost. The drained water after treated by the method disclosed by the invention can be applied to greening, landscapes and the like in a plant. Simultaneously, the tower earthworm ecological filter plays a role in beautifying the environment.

Description

technical field [0001] The invention belongs to a method in the technical field of environmental protection, in particular to a method for treating industrial waste water by utilizing a CASS process and a tower type earthworm ecological filter. Background technique [0002] In recent years, with the rapid development of economy and society, environmental problems have become increasingly prominent. A large amount of uncontrolled sewage is directly or indirectly discharged into water bodies, which greatly exceeds the capacity of the environment and makes the pollution increasingly serious. Industrial wastewater is an important source of pollution to the water environment. Its main characteristics are high concentration of organic matter, wide and fluctuating pollutant concentration range, complex water quality, and certain harm to the ecological environment and human beings. At the same time, the shortage of water resources has higher and higher requirements for sewage reuse....

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method of combining biological and ecological treatment of industrial wastewater for the shortcomings of single CASS or earthworm ecological filter in terms of pollutant removal. Combined, the synergistic tre

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