Full-amount treatment system and method for leachate of garbage transfer station

Abstract

The invention provides a full-amount treatment system and method for leachate of a waste transfer station, and the system comprises an electric flocculation reaction tank, an MBR biochemical reactor, an STRO membrane module, an AOP reaction tower and a BAC reaction tower which are connected in sequence, and also comprises an ozone generator, a pure oxygen preparation device and a sludge dewatering device; the anode of the electric flocculation reaction tank can generate oxygen bubbles or chlorine bubbles, and the cathode of the electric flocculation reaction tank can generate hydrogen bubbles; the MBR biochemical reactor comprises an anaerobic tank, an aerobic tank and an MBR ultrafiltration membrane assembly which are connected in sequence, and the aerobic tank performs pure oxygen aeration in a jet aeration feeding manner and can generate oxygen bubbles with the diameter smaller than 50 microns; the STRO membrane assembly is connected with the MBR ultrafiltration membrane assembly, and the AOP reaction tower is connected with a concentrated solution outlet of the STRO membrane assembly; the ozone generator is connected with the AOP reaction tower, the pure oxygen preparation device is respectively connected with the aerobic tank and the ozone generator, and the sludge dewatering device is respectively connected with the electric flocculation reaction tank and the anaerobic tank. According to the invention, the leachate of the waste transfer station can be effectively discharged up to the standard.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a system and method for total treatment of high-difficulty organic wastewater such as leachate in a garbage transfer station. Background technique [0002] After the domestic waste is thrown into the trash can by the residents, it enters the mid-end transfer link. Firstly, the garbage collected from each community is collected at the small-scale garbage transfer station at the concentration point of the community for compression treatment, and then transported by garbage trucks to large and medium-sized transfer stations in each district for further compression, and finally transported to waste incineration plants or landfills by large vehicles for final treatment and disposal. [0003] When the garbage transfer station performs garbage compression, it will produce garbage leachate accounting for about 5-15% of the total garbage. The leachate belongs to fresh landfill l...

AI Technical Summary

Problems solved by technology

[0004] At present, the leachate of many garbage transfer stations still adopts the method of direct discharge, but because the concentration and complexity of pollutants in the leachate are much higher than that of municipal sewage, it has a great impact on municipal sewage treatment plants, and it is urgent to treat the leachate on the site of the transfer station. The filtrate is treated to remove most of the pollutants before being discharged into the municipal pipe network

[0005] The traditional process generally adopts coagulation + biochemical + membrane treatment or pure biochemical process route. Although the above processes have a certain degree of pollutant removal effect, there are still many shortcomings: large footprint, unstable biochemical operation, COD and The total nitrogen treatment is not up to standard, and there are many problems such as the membrane concentrate to be treated

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