Method for treating sewage by using poultry dung and implementing device thereof

Abstract

The invention provides a method for treating sewage by using poultry dung, which comprises the following steps: S101, delivering poultry dung liquid to a liquid collecting tank with a drain pipeline; S102, leading out organic liquid containing C, N and P elements after the dung liquid is naturally decomposed and settled in the liquid collecting tank for multiple times; S103, delivering the organic liquid to a return sludge pump room, and mixing the organic liquid and active sludge in the return sludge pump room for providing the C, N and P elements required for the growth of microbe therein; S104, delivering the active sludge and the sewage to be treated to an oxidation ditch together, decomposing the organic substances in the sewage by the microbe in the active sludge by an A2 / O process,and leading out sludge-water mixed solution; and S105, guiding the sludge-water mixed solution into a secondary sedimentation tank to separate the sludge from the water in the tank, returning the separated sludge to the return sludge pump room, and discharging the clarified water. The method can solve the problem of lacking nutrient sources during treating the sewage so as to ensure the normal operation of a sewage treatment plant, changes the animal dung into valuable, and has the advantages of zero pollution, simple and convenient operation and low cost.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method using animal feces as a nutrient source for activated sludge and a device for its realization. Background technique [0002] In nature, there are a large number of microorganisms that live on organic matter. They have the function of oxidatively decomposing organic matter and converting it into inorganic matter, and at the same time reproduce themselves in large numbers. The biological treatment of sewage is to use this function of microorganisms and take certain engineering measures to create an environment conducive to the growth and reproduction of microorganisms, so that microorganisms can proliferate in large numbers, and improve the ability of microorganisms to oxidize and decompose organic matter, so as to achieve the purpose of treating organic sewage. [0003] The activated sludge method is an effective biological treatment method for u...

AI Technical Summary

Problems solved by technology

[0004] Traditional activated sludge treatment methods are easily affected by the quality of source water during operation. In the case of large fluctuations in incoming water, the ratio of COD to BOD in industrial wastewater is low, and the biodegradability of source water is poor, making it difficult to ensure production. The process can run stably for a long time, and it is difficult to adjust the process; in addition, due to the lack of nutrient sources in industrial wastewater, the ratio of COD to BOD is low, and it contains some toxic and harmful elements that affect the growth of microorganisms in activated sludge, resulting in sludge growth. Bad condition, which will directly affect the normal operation of the sewage treatment plant

Traditional methods usually use artificial addition of chemical raw materials to solve the problem of lack of nutrient sources. This addition method is not only time-consuming and laborious, unable to solve the fundamental problem, but also increases production and operation costs, and is easy to cause new pollution

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