Membrane process printing wastewater treatment system and membrane process printing wastewater treatment method

Abstract

The invention discloses a membrane process printing wastewater treatment system and a membrane process printing wastewater treatment method. The membrane process printing wastewater treatment system comprises a coagulation pond, an air flotation machine, a contact oxidation tank, a sedimentation tank, an internal aeration membrane pool, a fiber swivel plate filter and an ozone decoloring tank. Furthermore which are connected in sequence, the invention also discloses a printing wastewater treatment method using the membrane process printing wastewater treatment system. Aiming at high ammonia nitrogen wastewater of printing, the system and the method adopt a conventional biofilm method, which takes an anaerobic layer as an inner layer and uses an aerobic layer as an outer layer, as an aerobic section, and adopt an internal aeration membrane method, which takes an anoxic layer as an outer layer of and uses an aerobic layer as an inner layer, of an anti-conventional biofilm structure as ananoxic environment, thus completing the ammoniation, nitrification and denitrification processes together, and increasing the denitrification efficiency; furthermore, less mud is produced, and a sludge bulking phenomenon is avoided.

Description

technical field [0001] The invention relates to a membrane method printing wastewater treatment system and method. Background technique [0002] At present, printing wastewater in the printing and dyeing industry needs to add a large amount of urea in order to improve the vividness of the pattern, resulting in not only high pollutant concentration, high chroma, but also high ammonia nitrogen in the discharged wastewater. The traditional treatment method is the deformation process based on activated sludge or contact oxidation method, such as AO process, AAO process, etc., or the biofilm method with less sludge production, but none of them can improve the denitrification efficiency, and the activated sludge This method produces a large amount of mud and consumes a lot of energy. The biofilm method has great limitations on denitrification. In traditional biofilms, both oxygen and substrate diffuse from the outside of the biofilm to the inner layer, making nitrifying bacteria...

AI Technical Summary

Problems solved by technology

The traditional biochemical process cannot completely decompose the colored groups, and the coagulation process may also introduce chromaticity due to the addition of coagulant.

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