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Reverse osmosis advanced treatment of leachate in Shantou Leidashi domestic garbage sanitary landfill

2015/01/30 15:11
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According to Shantou Daily News on January 29, 2015, the Leidashi domestic waste sanitary landfill site is the only harmless disposal site for domestic waste in the central urban area, and it is responsible for the consumption of more than 1,350 tons of domestic waste per day in the central urban area. Task. Since the landfill has been in full operation for more than 10 years, in order to ensure that the domestic waste generated every day in the central city can be treated in a timely and harmless manner, our city will carry out the "Xiangshan Nest" mountain on the southeast side of the landfill. Landfill expansion project. The reporter learned from the Municipal Urban Management Bureau that the land acquisition work for the expansion project has been completed and is expected to start in May this year.

It is understood that the total investment of the project is estimated to be 168.6 million yuan. According to the planning and design of the processing scale, it is 1500 tons per day in the near future and 410 tons per day in the long term. The expansion project is planned as "two areas and one system", that is, domestic waste landfill area and solidified ash landfill area and leachate collection and treatment system. The main construction contents of the project include earthwork, groundwater and leachate drainage project, anti-seepage membrane laying project, flood interception ditch project, dam body project, landfill gas collection and drainage project, leachate collection and treatment project, etc.

It is understood that in order to prevent the leachate produced by the landfilled garbage in the reservoir area from polluting the soil and groundwater in the area, the project party designed the anti-seepage structure of the expansion project with high standards and a high starting point, using composite imported anti-seepage membranes to make the reservoir area It is completely isolated from the underground, effectively preventing the pollution of leachate. In addition, an advanced leachate treatment system is adopted, and the leachate is treated with deep reverse osmosis technology, and the quality of waste water after treatment fully meets the national discharge standards. At the same time, the landfill gas recovery and purification technology is used to cover the garbage pile with soil and film, and the landfill gas is extracted and purified to be processed into commercial biogas, turning waste into treasure.

"Shantou Daily" reporter Yang Ke


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