Composite uncoupling agent

Abstract

The invention relates to a composite uncoupling agent for reducing excess sludge in a sewage treatment process by an activated sludge method, which comprises the following components: 3,3,4,5-tetrachloro salicylamide, soluble copper salt and an adsorbent, wherein the soluble copper salt is one of copper sulfate, copper chloride or copper acetate; the adsorbent is one of refined diatomite or zeolite powder or a mixture of the refined diatomite and the zeolite powder; the weight ratio of the 3,3,4,5-tetrachloro salicylamide to the soluble copper salt is 1:0.05-0.25; and the weight ratio of the total of the 3,3,4,5-tetrachloro salicylamide and the soluble copper to the adsorbent is 1:0.05-1.00. The composite uncoupling agent has obvious positive effect, particularly stronger sludge reductionperformance. If the same weight reduction rate of the sludge is achieved, the added TCS (tetrachloro salicylamide) can be reduced by 25 to 75 percent, and after the TCS is added into a system, the removing rate of the COD (chemical oxygen demand) is basically not influenced.

Description

technical field [0001] The invention relates to a decoupling agent, in particular to the decoupling of residual sludge used in the activated sludge aerobic treatment process for sewage treatment, and the main component is 3,3,4,5-tetrachlorosalicylamide joint agent. Background technique [0002] Activated sludge method is currently the most widely used sewage (including urban sewage or industrial sewage) biological treatment technology, although this process technology has many advantages, such as less investment in infrastructure, good treatment effect, stable operation, etc., but it also has a The obvious disadvantage is that a large amount of residual sludge will be generated during operation. The cost of excess sludge treatment is quite high, generally accounting for 25% to 65% of the total operating cost of the sewage plant. Therefore, reducing or reducing the generation rate of excess sludge in the activated sludge sewage treatment process has always been a subject of...

AI Technical Summary

Problems solved by technology

Although all uncoupling agents have a common disadvantage, that is, the activity of sludge will be reduced after being added to the system, but this disadvantage of TCS is more significant, and the "killing" effect on microorganisms is relatively greater, which may be One of the main reasons why TCS cannot completely replace other uncouplers

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