LCD (liquid crystal display) industrial wastewater advanced treatment technology

Abstract

The invention discloses an LCD (liquid crystal display) industrial wastewater advanced treatment technology. The LCD (liquid crystal display) industrial wastewater advanced treatment technology mainly comprises the following steps: carrying out pretreatment on LCD industrial wastewater by adopting a traditional water treatment technique; then putting the LCD industrial wastewater into a hydrolysis acidification pool so as to improve the biodegradability of wastewater; then guiding supernate into an ozone high-level oxidation reactor after the treatment by a BNR (Biological nutrient removal) unit, and removing low-concentration degradation-resistant organics in wastewater; and then, enabling yielding water of the ozone high-level oxidation reactor to flow through a BAF (biological aerated filter), an efficient settling pond, a micro filter chamber and a disinfecting tank. Degradation-resistant pollutants in the LCD industrial wastewater are decomposed so as to achieve the aim of water purification. The technology disclosed by the invention not only can be used for reducing the treatment and investment costs and the occupied areas, but also can be used for treating pollutants which cannot be removed by a traditional technology and performing advanced treatment on the LCD industrial wastewater; the water quality indexes of yielding water after treatment meet the IV-type surface water quality requirement of surface water environmental quality standards GB3838-2002, thus realizing harmless treatment and recycling of the industrial wastewater.

Description

technical field [0001] The invention relates to an advanced treatment process of industrial wastewater, in particular to an integrated technology of physicochemical, biochemical, ozone advanced oxidation and membrane method for advanced treatment of liquid crystal display industrial wastewater, which belongs to the field of sewage treatment. Background technique [0002] At present, in terms of industrial wastewater treatment, there are many low-level treatment processes, that is, after simple treatment of industrial wastewater, the effluent can meet the requirements of the "Water Quality Standard for Discharge of Sewage into Urban Sewers" (CJ343-2010); or after further treatment, meet the requirements of The lower discharge standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002), the effluent water quality requirements are not very strict. With the deterioration of the water environment quality, more and more stringent requirements a...

AI Technical Summary

Problems solved by technology

[0006] 1. The comprehensive industrial wastewater discharged from each process of liquid crystal display has high toxicity, many types of pollutants, and high concentration. The water quality index of the treated effluent is difficult to meet the water quality requirements of surface water IV;

[0007] 2. The biodegradability of liquid crystal display industrial wastewater is very low, and it is difficult to treat this type of industrial wastewater by using traditional sewage biological treatment methods;

Images