Treatment method of rubber processing wastewater difficult to biodegrade

Abstract

The invention discloses a treatment method of low-concentration rubber processing wastewater difficult to biodegrade, and belongs to the technical field of chemical wastewater treatment. The inventionprovides a treatment method of rubber processing wastewater difficult to biodegrade. The method comprises the following steps: mixing production wastewater to be treated, removing floating oil organic matters through air floatation treatment, removing colloid organic matters through flocculent precipitation, carrying out catalytic ozonation on the wastewater, mixing effluent with domestic sewageand initial rainwater, carrying out nitrification and denitrification treatment, finally feeding into a coagulating sedimentation tank, carrying out secondary coagulating sedimentation, and discharging. The wastewater is pretreated to remove floating oil and a large amount of suspended organic matters, and the molecular structure of the non-biodegradable organic matters is further destroyed through catalytic ozonation, so that the biodegradability of the wastewater is improved, and the COD and ammonia nitrogen of the wastewater are reduced through nitrification and denitrification treatment, so that the effluent reaches the enterprise reuse water standard, and zero emission of enterprises is realized.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and more specifically, relates to a method for treating difficult-to-biodegradable rubber processing wastewater. Background technique [0002] The organic wastewater produced by rubber processing and molding companies is generally low-concentration wastewater that is difficult to biodegrade, and most of the wastewater is molding cooling wastewater, floor washing water, etc. During the rubber processing and molding process, no water is required to be added to the raw materials, so the amount of wastewater generated is small. Compared with other wastewater, this wastewater has the following three notable characteristics: 1. It contains a large amount of oily organic matter. The oil will form a film on the water surface to prevent the oxygen in the air from dissolving in the water and reduce the dissolved oxygen in the water. As a result, the plankton in the water body will die due to lack of oxy...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem in the prior art that it is difficult to treat the low-concentration rubber processing wastewater that is difficult to biodegrade, the present invention provides a treatment method for the difficult-biodegradable rubber processing wastewater. The wastewater mainly contains polymers in detergents and release agents. After mixing polyether compounds, polyols, alkyl sulfonates and fatty alcohol ethers, the production wastewater to be treated is mixed, and the floating oily organic matter is removed by air flotation treatment, and colloidal organic matter is removed by flocculation and precipitation, and then the wastewater is subjected to ozone catalytic oxidation. Nitrification and denitrification are carried out after the effluent is mixed with domestic sewage and initial rainwater

Wastewater is pretreated to remove slick oil and a large amount of suspended organic matter, and the molecular structure of refractory organic matter is further destroyed by ozone catalytic oxidation, which solves the problem of difficult treatment of refractory low-concentration rubber processing wastewater

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