Leachate control system in limestone karst area

Abstract

The invention provides a lime karst leachate regulation system which comprises a cylindrical sewage well and an annular filter channel arranged around the outer side of the bottom of the sewage well; the filter channel communicates with the bottom of the sewage well; the top surface and bottom surface of the filter channel are supported by a plurality of supporting plates; a casing tube is arranged in the sewage well; cement paste is grouted between the casing tube and the sewage well body; the communicating position between the bottom of the sewage well and the inner circumference of the filter channel is provided with a water-permeable tube; the leachate enters the filter channel via the wall of the water-permeable tube; the bottom surface of the sewage well is coated with cement; the filter channel is filled with rubble and sandstone; a filter unit is sheathed outside the water-permeable tube; the filter unit can thoroughly filter out sand in the leachate and reduce the block probability; and the filtered leachate can directly seep into the solution cavities of the ground and converge into the underground water, thereby facilitating the reutilization.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a leachate control system in a limestone karst area. Background technique [0002] Domestic waste incineration power generation treatment method is one of the main ways of urban domestic waste treatment. The water content of municipal solid waste in my country is high. After being piled up in a large amount in the storage pit before incineration, it will ferment to produce leachate. The water quality of the leachate is complex, the concentration of organic matter is high, the content of ammonia nitrogen is high, the color is deep, and the odor is strong. The treatment process High difficulty. [0003] In the prior art, there are two main types of leachate treatment methods: one is to directly discharge the leachate into the urban sewage treatment plant for combined treatment after a certain pretreatment; the other is to treat the leachate Treated separately. Combined t...

AI Technical Summary

Problems solved by technology

Combined treatment requires the leachate to be transported to the sewage treatment plant through pipelines. The transportation cost is high, economically unreasonable, and it will have an impact on the treatment system of the sewage treatment plant; the leachate is treated separately, and the existing leachate treatment Process method, there are many forms, but it is not very ideal in terms of efficiency, effect and investment cost

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