A kind of treatment method of high-concentration stripping liquid wastewater

Abstract

The invention discloses a treatment method for stripping liquid wastewater. The stripping liquid waste water contains dimethyl sulfoxide and ethanolamine, which includes: 1) adjusting the pH value of the waste water to 8.5-10.0; 2) passing the treated waste water into The moving bed biofilm reaction tank containing Mycelophora and Thiobacillus is used for treatment, and the pH value of the system is controlled at 7‑8 during the treatment process; 3) The above-mentioned treated wastewater is passed into the anoxic tank for denitrification treatment; 4) Pass the above-mentioned treated wastewater into the anaerobic tank for ammonification treatment to obtain NH containing free ammonia 3 and ammonium ion NH 4 + 5) Pass the above-mentioned treated wastewater into the aerobic pool for nitrification reaction, control the pH value of the system during the treatment process at 7‑8, and return part of the wastewater in the aerobic pool to the anoxic pool; 6) Separating the treated waste water from mud and water; the present invention can effectively and efficiently treat stripping liquid waste water with a large amount and high concentration of organic waste water.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to the treatment of stripping liquid wastewater, in particular to a treatment method for high-concentration stripping liquid wastewater. Background technique [0002] At present, the strength of domestic panel manufacturers, especially LCD panel manufacturers, has been continuously enhanced, and their production capacity has been greatly increased. In the process of producing panels, positive and / or negative photoresist strippers, etc. will be used. These strippers Generally, it is strongly alkaline, and the pH value is basically above 10. At present, the main pollutants of these stripping solutions are dimethyl sulfoxide (DMSO) and ethanolamine (MEA). The intermediate products of DMSO such as (dimethyl sulfide) DMS will Inhibitory to microorganisms, inhibition of microbial growth, MEA will lead to high COD concentration and high ammonia nitrogen concentrati...

AI Technical Summary

Problems solved by technology

In the past, when the production capacity was small, physical and chemical methods were used for treatment, which could barely meet the lower emission standards, but the treatment efficiency was still low and the cost was high; and with the continuous improvement of production capacity, the amount of stripping liquid used also increased significantly. The corresponding increase in waste water will gradually increase, and the organic waste water in the waste water has serious harm to the ecological environment and human health because of its high concentration, inhibition and difficulty in biodegradation. Existing physical and chemical methods have been used It is difficult to effectively and efficiently treat this high-concentration and large-volume stripping liquid wastewater

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