Geomembrane Coverage In The Application Of Municipal Solid Waste Landfill

Geomembrane coverage is the key to divorce rainwater and sewage using for reduce leachate treatment in domestic waste sanitary landfill site and collect,treat and utilize of landfill gas and improve the environment.Through comparison and analysis of the raw materials(low density polyethylene, linear low density polyethylene,high density polyethylene,antioxidant,light shield agent of carbon black,anti-ager) and product properties of geomembrane, indicate that HDPE geomembrane has the most excellent performance.The paper has also carried on thediscussion and research on the laying welding construction technology and method for the detection and acceptance.The improvement of welding technology of geomembrane is an important guarantee that geomembrane can be used for waste covering layer.The other materials of geomembrane covering system were also analyzed and explained.And points out that they have an indispensable role for a while geomembrane covering system as same as HDPE geomembrane.Theoretically expounds that HDPE geomembrane is currently the most ideal material of domestic closed waste sanitary landfill site.Through the comparison of different performance of the traditional clay covering material and geomembrane covering material in domestic waste sanitary landfill site,we can see that the former has the necessity of substituted by the latter.Because from two aspects of theory and practice,it can be found that once using geomembrane covering technology,on the one hand, it will bring convenience such as leachate treatment,collection and utilization of landfill gas and field pest control,on the other hand,it will save area and reduce operating costs of landfill.Introduced by A’suwei’s waste sanitary landfill site Full closed process, Chaoyang’s deodorization control of garbage harmless treatment center and Beijing Haidian Liulitun’s waste sanitary landfill site covering engineering as a case.In the process of geomembrane application background,bringing on the leachate treatment,collection and utilization of landfill gas,save landfill site capacity,environmental governance and other aspects of the social benefits and economic benefits are calculated and analyzed.Demonstrate the feasibility of geomembrane covering process.Finally the problems of geomembrane covering technology has carried on the simple summary to the geomembrane covering technology, it provides reference evidence for the selection of geomembrane applications.Finally,the existing problems of geo-membrane covering technology are summarized in brief and gives some suggestions on the selection of geo-membrane materials.