Liner Structures and Life-cycle Performance of Municipal Solid Waste Landfills in China
The liner structures at landfill sites in China and the life-cycle service design method were investigated,which covered the leachate head,characteristic pollutant concentration load,the barrier mechanism of liners,the calculation method of breakthrough time,and the life-cycle service design criterion and process.A comparative analysis was conducted on the liner structures and their applicable conditions in three national standards of ChinaGB 16889-2024 Standard for Pollution Control on the Landfill Site of Municipal Solid Waste,GB 50869-2013 Technical Code for Municipal Solid Waste Sanitary Landfill,and Technical Code for Geotechnical Engineering of Municipal Solid Waste Sanitary Landfill.The service performance of typical liner structures was compared using the breakthrough-time calculation method.The analysis showed that Technical Code for Geotechnical Engineering of Municipal Solid Waste Sanitary Landfill explicitly required a life-cycle service performance analysis of liners based on the actual conditions of high kitchen waste content,high moisture content,large leachate production,and significant leachate head exceeding 30 cm at landfill sites.The standard also proposed a double-layer composite liner structure suitable for a high leachate head.The single-layer and double-layer liner structures specified in the GB 50869-2013 were unable to achieve a 100 years service life under high leachate head conditions,especially in valley-type landfills with a filling height exceeding 60 meters,where the breakthrough time of the double-layer liner structure was about 80 years.The double composite liner recommended in Technical Code for Geotechnical Engineering of Municipal Solid Waste Sanitary Landfill had a breakthrough time of over 100 years under the same conditions.
municipal solid waste landfillliner structurelife-cycle performancedesign methodology
NETL
NSTL
万方数据
