The design of the rainwater and sewage conveying system and landfill leachate treatment for a landfill site of Shanghai

Regarding the characteristic of bottomland landfill site, the design idea of segmenting collection, centralized discharging, the arrangement of rainwater and sewage switching ditch and making slope, is determined. The scheme of divisional discharging of the former three stages and the latter 4th stage of the landfill site is designed, and then the corresponding conveying measures are established. Furthermore, different treatment processes are analyzed and compared based on a synthetic water quality of the landfill leachate. The optimal scheme is selected which discharge meeting the standard of DB31/199-1997 criterion III.