《Technical Standard For Ecological Remediation Of Municipal Solid Waste Landfill》 Research For Industry Standard And Engineering Application

Leachate leakage is prevalent in more than 1000 waste sanitary landfills and more than 20,000 simple landfill sites in China,resulting in the risk of soil and groundwater pollution.To solve these problems,landfills need to be repaired.However,there are no technical standards related to site investigation and restoration in China.In this paper,through the analysis of metrology literature,participating in the school editor-in-chief of the "domestic waste landfill ecological restoration technical standards" related to site investigation and aerobic repair technical provisions,and participated in the actual project of the investigation report of the site of the Gangbiantian Road,the formation of the main research content and results are as follows:(1)SCI bibliometrics Research: Analysis of the current research situation in the field of ecological restoration of landfill sites at home and abroad: As of 2018,2956 articles were sent,an increase of about 8 times compared with 1997;The United States and China sent far more letters than other countries,accounting for about 30 of the total number of global communications;The application of biotechnology exists in the ecological restoration of landfill,and the research hotspot focuses on leachate,gas and soil;The contents of the site survey are barely present.(2)Site investigation procedures and core content preparation research: Based on the characteristics of landfill site in China,and the current "Site Environmental Survey Technical Guidelines(HJ25.1-2014)" Comparative analysis,put forward the status of landfill investigation work procedures,the core content for the garbage heap investigation,its physicochemical properties can provide a basis for the technical design of aerobic repair and evaluate the economic benefits for mining repair.The data of the reactor survey of two typical landfills were analyzed,and it was found that the physical and chemical properties of the reactor varied in different regions and at different depths.(3)Research on the related content of leachate and gas system: the leachate should adopt underground recharge when aerobic repair,and the recharge design of the reactor should consider the factors such as air injection/extraction,leachate recharge/drainage,aerobic biological reaction degradation and so on;The main mode of aerobic gas migration is diffusion transfer and convection transfer,and the migration process is very complicated.Field tests should be carried out before the spacing of gas injection is determined.(4)Case study: The above research results are applied to the investigation of pollution sites near Gangbiantian Road,Wuhan,the condition of the garbage reactor and its surrounding environment is analyzed and evaluated.