Treating process for high-concentration DMF leather steaming solution

Abstract

The invention relates to a treating process for a high-concentration DMF leather steaming solution. The treating process comprises the following steps: pouring high-concentration DMF leather wastewater into a water collecting regulating tank; regulating water quality and water quantity; adopting a lifting pump for lifting the leather wastewater in the water collecting regulating tank into a neutralizing reaction tank; adding acid for adjusting pH and then entering into a biochemical pool, thereby biochemically degrading pollutants, such as, most organic matters and ammonia nitrogen; coagulating by adding a coagulant into a coagulation reaction tank by which the effluent from the biochemical pool passes, and then pouring into a secondary sedimentation tank for precipitating; removing suspended solids from water; pouring into a chemical oxidation tank; adding an oxidizing agent into the chemical oxidation tank; further degrading the organic matters which are difficult to be chemically treated, thereby increasing the biodegradability of the wastewater; after the effluent chemically oxidized in the chemical oxidation tank passes by the coagulation reaction tank, adding the coagulant into the coagulation reaction tank and then pouring into the sedimentation tank for precipitating; guiding the effluent from the sedimentation tank to enter into a catalytic oxidation tank for performing secondary biochemical treatment, thereby further degrading COD and ammonia nitrogen; coagulating and precipitating the effluent after the secondary biochemical treatment in the coagulation reaction tank; discharging the precipitated sludge into a final sedimentation tank, thereby guaranteeing the effluent being clean, transparent and odorless.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a process for treating high-concentration DMF leather distilled liquid. Background technique [0002] The high-concentration DMF leather distillation liquid contains a large amount of refractory organic matter, which has a strong odor, high chroma, and is difficult to handle. Its COD content is 9132 mg / L, ammonia nitrogen is 972 mg / L, and the pH value is about 10.2. The water COD after biochemical treatment is 1568mg / L, ammonia nitrogen 39mg / L, its COD, ammonia nitrogen content is too high. Therefore, there is an urgent need for a treatment process to solve the problem of difficult treatment of high-concentration DMF leather distillate. Contents of the invention [0003] Aiming at the problems of low treatment quality and difficult degradation of refractory organic matter existing in the existing high-concentration DMF leather distillate treatment proc...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of low treatment quality and difficult degradation of refractory organic matter existing in the existing high-concentration DMF leather distillate treatment process, the present invention aims to provide a high-concentration DMF leather distillate treatment process

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