Technology for treating waste water produced by rubber accelerator production

Abstract

The invention relates to a treatment process for rubber accelerator production wastewater. The main steps are as follows: adjust the water quality and quantity of the rubber accelerator production wastewater, then adjust the waste pH value to 11-13, adjust the wastewater temperature to 60-90°C, stir for 2 ~4h to carry out alkaline hydrolysis reaction; after alkaline hydrolysis, use sulfuric acid to adjust the pH value of the wastewater to 5.0 ~ 6.0, and perform evaporative desalination treatment; the wastewater after evaporation and desalination is subjected to anaerobic treatment; the anaerobic precipitated water is sequentially subjected to anoxic, aerobic, and secondary Secondary sedimentation treatment, there is mixed liquid and sludge return between the secondary sedimentation treatment and anoxic treatment; the effluent from the secondary sedimentation treatment is sequentially subjected to Fenton catalytic oxidation, coagulation sedimentation, and filtration depth treatment. Aiming at the characteristics of the water quality and quantity of rubber accelerator production wastewater, this invention combines physical and chemical treatment and biochemical treatment methods, so that the wastewater COD, ammonia nitrogen and other indicators can stably reach the corresponding emission standards. In addition, this treatment process is compact, easy to operate, and has low energy consumption. , has strong practicability and is easy to be industrialized. After the wastewater is deeply treated, it is easy to reuse the reclaimed water and achieve the effect of recycling the wastewater resources.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a process for treating waste water produced by rubber accelerators. Background technique [0002] Rubber vulcanization accelerator production wastewater has the characteristics of complex components, many types of organic pollutants, high concentration, high toxicity and high salt content, and has become a high-concentration organic wastewater that is difficult to treat at home and abroad. Therefore, how to effectively treat this type of wastewater has become one of the problems faced by my country's water environment protection. [0003] The wastewater produced in the rubber accelerator production process contains a large amount of refractory heterocyclic organic matter, which belongs to high-concentration refractory organic wastewater. It has large molecular weight, strong toxicity, complex structural components, stable properties, and easy enrichment. effect. ...

AI Technical Summary

Problems solved by technology

Due to the high salinity and a large amount of toxic substances in wastewater, it is difficult to meet the discharge requirements by purely using biochemical treatment, so the combined treatment of physicochemical-biochemical groups and processes is the development direction of wastewater treatment

[0005] Patent CN201210362562.1 provides a rubber vulcanization accelerator MBTS wastewater treatment method, which is mainly composed of six parts: acid-base flocculation, micro-electrolysis, Fenton oxidation, coagulation precipitation, activated carbon adsorption, and resin adsorption. Its advantage is the degradation of organic matter in wastewater More sufficient and less toxic, but this patented technology has a long treatment process, complicated operation, high treatment cost, and is not suitable for treating high-concentration accelerator production wastewater

Patent CN102311156A provides a method for photocatalytically treating waste water from rubber accelerator production, specifically using titanium oxide catalyst to assist ultraviolet light to treat rubber accelerator production waste water. Better, but the catalyst preparation procedure is more complicated and the cost is higher. Long-term exposure to ultraviolet light is easy to damage equipment and endanger human health. In addition, it is difficult to treat the waste water produced by rubber accelerator with large flow rate and high concentration to meet the standard.

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