Leachate collection device and construction method for ecological restoration of sanitary landfill

Abstract

The invention discloses a leachate collection device for ecological remediation of a sanitary landfill and a construction method for the leachate collection device. The leachate collection device comprises a concrete foundation and an adjusting tank. Leachate collection branch pipes are arranged on the side face of a leachate collection main pipe and are provided with leachate collection holes. Ametal rod is provided with a casing and a leachate guide plate. A geotechnical grid is arranged at the end of the leachate guide plate. The areas between the geotechnical grid, a seal plate and a covering plate are filled with gravel layers. The construction method comprises the following steps of (a) excavation of a foundation pit, (b) building of the adjusting tank, (c) embedding of a leachate out-discharge pipe, (d) installation of a leachate flowing-in part, (e) installation of a leachate guide filter part, (f) filling-in of the gravel layers, (g) installation of the covering plate, and (h) connecting-in of a waste gas treatment device. According to the leachate collection device for ecological remediation of the sanitary landfill and the construction method for the leachate collectiondevice, leachate can be fully collected, sewage discharge capacity of the whole sanitary landfill is improved, installation is conducted from inside to outside, the range of a leachate collection space can be determined, and construction operation is easy to control.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a leachate collection device for ecological restoration of a sanitary landfill and a construction method thereof. Background technique [0002] During the process of stacking and landfilling garbage, due to biochemical degradation such as compaction and fermentation, and at the same time, a liquid with high concentration of organic or inorganic components is produced under the seepage of precipitation and groundwater, which we call landfill leachate. Also called leachate. There are many factors affecting the production of leachate, mainly including the rainfall in the landfill area, the nature and composition of the waste, the anti-seepage treatment of the landfill, and the hydrogeological conditions of the site. [0003] The water quality characteristics of landfill leachate are as follows: [0004] (1) The water quality of the leachate is very comple...

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Problems solved by technology

[0008] (5) The content of ammonia nitrogen is high, the ratio of C / N is out of balance, and the lack of phosphorus element brings certain difficulties to biological treatment

However, when the landfill leachate is collected, the leachate is directly discharged into the adjustment tank through the settlement of the garbage. This process is not enough to collect the leachate, and the solid waste is easy to block the pipe opening of the adjustment tank, causing the adjustment tank to seepage. The water quality and water volume balance ability of the filtrate is reduced, which seriously affects the subsequent biodegradation

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