Treatment method for waste water from artificial leather

Abstract

The invention relates to a treatment method for waste water and provides the treatment method for waste water from artificial leather. By using the treatment method, ammonia nitrogen in the waste water can be effectively degraded, COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand) in the waste water are removed, and the treatment efficiency is high. The treatment method comprises the following steps: firstly, collecting the waste water; secondly, filtering; thirdly, feeding precipitates into an aerobic pond and enabling the precipitates to react in the aerobic pond for 12-16 hours; fourthly, performing nitrification and denitrification reactions; fifthly, feeding upper-layer waste liquid treated in the fourth step into an intermediate sedimentation tank, removing suspending matters in the waste water by settling, reflowing sludge generated by settling to the aerobic pond and continuously performing an aerobic reaction in the aerobic pond for 10-12 hours; sixthly, discharging the waste water in the intermediate sedimentation tank into an acid splitting tank and performing hydrolysis and acidification reactions; seventhly, feeding precipitates treated in the third step into an ozone catalytic reaction tower and reacting for 1-2 hours and continuously enabling the reactants to enter a biological activated carbon filter; eighthly, discharging substances treated in the seventh step into a soil infiltration system.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to an artificial leather wastewater treatment method. Background technique [0002] The vigorous development of the artificial leather industry has driven the simultaneous development of upstream and downstream industries such as high-grade resin production, clothing, shoemaking, and luggage industries. With the accelerated pace of market internationalization, my country's artificial leather output will maintain a sustained and steady growth, and the artificial leather industry is facing huge development potential and broad market space. The main components of tannery wastewater are complex, there are many types of pollutants, the treatment is difficult, the pH value is high, the chroma is high, and the organic wastewater with high concentration is difficult to treat. In particular, tower washing wastewater has low B / C, poor biodegradability, high concentration of organic matter, an...

AI Technical Summary

Problems solved by technology

The main components of tannery wastewater are complex, there are many types of pollutants, the treatment is difficult, the pH value is high, the chroma is high, and the organic wastewater with high concentration is difficult to treat.

In particular, tower washing wastewater has low B / C, poor biodegradability, high concentration of organic matter, and large fluctuations in water quality, and the structure of organic matter is mainly macromolecular polymer and chain structure. At present, oxidation ditch and SBR are widely used in China. Compared with the biological contact oxidation method, the general treatment process is difficult to degrade, and it belongs to the high-concentration organic wastewater that is difficult to degrade