Rubber Auxiliary Wastewater Treatment Technology

With the country's increasing attention to environmental governance, the national requirements for energy conservation and emission reduction continue to improve, and the newly revised Environmental Protection Law puts forward stricter regulatory requirements for enterprises. In addition, during the "13th Five-Year Plan" period, the implementation of environmental policies and the rise of the green tire wave, green manufacturing and clean production process have become the top priorities in the development of rubber auxiliaries industry. Under the situation of high pressure on environmental protection, small and medium-sized enterprises that fail to meet the standards of environmental protection and have irregular operations will face production reduction, production suspension and even bankruptcy.

At present, wastewater treatment has become a key link to restrict the good and stable operation of enterprises, especially high-concentration wastewater, high concentration of organic matter, high salt content, it can not be completely standard treatment of wastewater through the general way of physicochemical + biochemical treatment.

Characteristics of wastewater

The difficulty of rubber auxiliary wastewater treatment lies in:

(1) high salt content. The production of the main rubber auxiliaries, especially the largest use of secondary sulfonamides, thiazoles, thiuram, carbamate and other auxiliaries have acid base regulation or oxidation reaction steps, in this process will produce a large number of sodium chloride or sodium sulfate and other salts, some products of wastewater salt concentration can even reach more than 7%.

(2) High concentration. In order to improve the product output per unit time, while reducing the amount of waste water, the manufacturers often increase the reaction concentration to achieve the above goals, so that the concentration of COD in the mother liquor is very high, some products produced by the mother liquor water COD can reach tens of thousands of mg/L, if you do not do pretreatment, then the existing biochemical tank microorganisms will cause a severe impact.

(3) The pollution factors were numerous and varied greatly. A variety of rubber auxiliaries are generally used at the same time in the formulation system of rubber products production, including accelerators, vulcanizing agents, antioxidant agents, coupling agents and other processing auxiliaries.

solution

In view of the complex composition, high chroma, high COD content and high salt content of this kind of wastewater, it is difficult to biodegrade and is not suitable for biochemical treatment. At present, Haizhiyan Environmental Protection adopts the physicochemical process of two-stage micro-electrolysis + two-stage Fenton as the main body, which has been operated by several companies. The treatment effect is stable and good. The total removal rate of COD and aniline can reach 92.6% and 98.6% by this process.

Microelectrolysis process is particularly effective for high salt content, high chroma and high concentration organic industrial wastewater which is difficult to biodegrade. It is especially suitable for products such as vulcanization accelerator NS, CBS, M, DM, anti-coke agent CTP, antioxidant RD, etc. In rubber auxiliaries especially vulcanization accelerator and antioxidant enterprises have the promotion value.