This project includes three subprojects. The first subproject is pilot-scale landfill bioreactor experiment, after nine month experimental period, the reactor which leachate added with H2O2 before recirculating could accelerate the reduction of BOC or TOC during middle of experimental period, but the overall result suggested the easier and more economical operation to accelerate the biodegradation of the landfill is aerating leachate and recirculating evenly on the site. The second subproject is assessed technical equivalency assessment of GCL to other hydraulic barrier materials. The analytic results showed that the organic content of humus is enough for the development of plants; therefore, the most economical mode for the application of humus is to be the cover soil. The double-composite barrier type, which include geosynthetic clay liner, geomenbrane liner and leachate collection system, as hydraulic barrier could effectively decrease the liquid permeation for new set landfills. For the using landfills could comprise two geomembranes, each provided with geotextile separate layer and second hydraulic barrier to solve the settlement problem. The third subproject is public landfill sites inspection. The grade of the inspected 28 public landfills showed that the management of ash-landfills, which managed by local environmental protection bureau or outsourcing, had performed better than waste-landfills on access control, regularly groundwater quality monitoring, leachate treatment and safety plan. To enhance landfill management performance, local environmental protection bureau should regularly supervise the implementation of landfill operation.

landfill bioreactor ,compost,HDPE