Decentralized type sewage and sludge biochemical treatment system

Abstract

The invention relates to a system for decentralized sewage and sludge biochemical treatment, which comprises a biochemical filtering bed for biochemical treatment for sewage and a sedimentation regulating tank connected with a sewage source, water distribution tubes are arranged on the surface of the biochemical filtering bed and connected with a water pump in the sedimentation regulating tank via a main water distribution tube, a sludge filtering bed is arranged near the sedimentation regulating tank which is provided with a sludge pump, the sludge pump is connected with the sludge bed via tubes, wherein grading of filler in the basement of biochemical filtering bed is reasonable, the filtering bed is fine in water permeability and microbiological survival environment, high in efficiency of sewage processing, and can avoid blocking and crusting, thereby the filtering bed is beneficial to long-term usage, as the drying stabilizing treatment on the sludge in the sedimentation regulating tank is achieved by the sludge filtering bed, pollution to others water source can be avoided, further as the sludge accumulating to a certain amount in the sludge filtering bed, one-time cleaning can be achieved and resourced utilization can be realized, thereby reducing the processing cost.

Description

technical field [0001] The invention relates to a distributed sewage and sludge biochemical treatment system. Background technique [0002] European Patent Publication Nos. EP0976683 and EP1180499 disclose a sewage treatment system. The treatment process is as follows: the water suspension containing sludge and the like, that is, sewage, is directly poured into a pool with a sealed bottom layer, and the sewage passes through the plants in the pool. The suspension layer and drainage layer of reeds are then discharged from the bottom. [0003] U.S. patent document publication number US4678582A1 discloses a kind of sewage treatment system, and its treatment process is: the sewage is poured directly on the filter layer that is made of peat block and soil mixture, and the bottom of this filter layer has an inclined sealing bottom, and the bottom of the sealing bottom is There is a gravel layer at the end; the sewage is filtered through the filter layer and flows to the lower end...

AI Technical Summary

Problems solved by technology

[0006] The disadvantages of the above-mentioned prior art are: direct biochemical treatment of sewage causes the suspended solids in the filter to block the filter within a certain period of time, and the filter layer of the biochemical filter bed is prone to blockage and hardening, which greatly affects the quality of the filter. The water flow capacity and service life of a single filter; at the same time, there are a large number of anaerobic reactions at the bottom of the filter, which causes a large amount of methane, hydrogen sulfide and various bacteria (such as: E. coli) in the water, and the content of nitrogen and phosphorus is high. , thus greatly affecting the water quality of the effluent

[0008] The disadvantages of the above technical solutions are: sewage is often directly poured into the filter bed and the amount is large, it is easy to damage the plant layer on the surface of the filter bed, and the filter layer is prone to blockage and hardening, resulting in insufficient sewage filtration and short service life; The sludge in the hydrolysis tank needs to be pumped out regularly, and the water content in the pumped out sludge is high, and the cost of sludge concentration and dehydration is high, which is not conducive to resource utilization

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