Transformation method for achieving diversion of rain and sewage in non-partitioned plain-type refuse landfill

Abstract

The invention discloses a transformation method for achieving diversion of rain and sewage in a non-partitioned plain-type refuse landfill, and belongs to the field of domestic refuse disposal. The transformation method comprises the following steps: making a retaining dam in a refuse landfill area and a non-landfill area in a reservoir by virtue of refuse, and conducting partitioning setting; covering the retaining dam and the non-landfill area by virtue of an HDPE (high-density polyethylene) film, pressing the covering HDPE film by virtue of sand bags at the top and four sides of the retaining dam, and arranging floating blocks under the covering film, so that retained rainwater leachate is smoothly guided and discharged by virtue of a guidance and drainage system, wherein the edge of the HDPE film passes across the retaining dam; and discharging sewage leachate into a landfill sewage leachate disposal station and pumping rainwater on the film to a drainage ditch. According to the transformation method provided by the invention, transformation on an existing landfill guidance and drainage system is avoided in an implementing process, shortcomings in an original landfill design process are overcome and the diversion of rain and sewage in the non-partitioned plan-type landfill is achieved; and the transformation method is stable in effect, and the method is capable of relieving pressure of a following sewage leachate disposal system due to the increase in the amount of the sewage leachate and reducing operation cost.

Description

technical field [0001] The invention belongs to the field of domestic garbage treatment, and in particular relates to a transformation method for realizing rain and sewage diversion in undivided plain type garbage landfills. Background technique [0002] In the existing landfills, due to the congenital design defects of some landfills, the construction unit usually only opens up an open area and sets up dikes around the landfill to prevent the sewage from the landfill from spreading to other areas. The area of ​​the landfill bottom is not partitioned, the anti-seepage system and the leachate collection and treatment station are set up at the bottom of the landfill, and then the municipal solid waste is piled here. Such a landfill usually has several hectares or more than ten hectares, and some even reach tens of hectares. For large-scale plain landfills, no divisions were set up for the bottom area at the initial stage of construction. All the rainwater will become leachate...

AI Technical Summary

Problems solved by technology

[0002] In the existing landfills, due to the congenital design defects of some landfills, the construction unit usually only opens up an open area and sets up dikes around the landfill to prevent the sewage from the landfill from spreading to other areas. The area of ​​the landfill bottom is not partitioned, the anti-seepage system and the leachate collection and treatment station are set up at the bottom of the landfill, and then the municipal solid waste is piled here. Such a landfill usually has several hectares or more than ten hectares, and some even reach tens of hectares. For large-scale plain landfills, no divisions were set up for the bottom area at the initial stage of construction. All the rainwater will become leachate. Since there is no partition, the rainwater in other areas will also become leachate after mixing with the leachate, and then the sewage within the catchment area of ​​the entire landfill reservoir area will become leachate. Leachate, which will undoubtedly greatly increase the processing burden of the landfill leachate treatment station and increase operating costs. If it is in an area with abundant rain or extreme weather, in this case, it will greatly increase the amount of leachate produced. The processing capacity of the leachate station in the original site area is far from the required processing capacity, and the sewage can only be discharged into the environment, resulting in environmental pollution around the landfill, and even triggering mass incidents

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