Landfill leachate treatment: a new approach
Municipal waste landfills generate leachates that must imperatively be treated before being discharged into the environment. The reverse osmosis membrane process is the most widely used method for treating these leachates. However, the efficiency of this process at the industrial scale is limited due to membrane fouling and the high osmotic pressures involved. This study develops a treatment which reduces these limitations. Chemical precipitation of the leachate using lime, followed by a standard filtration on a rotary drum vacuum precoat filter is studied. The osmotic pressure is decreased by 10 to 25％ through precipitation of the carbonates, and foulants are eliminated by co-precipitation. The sludge is stable, chemically inert and relatively dry (50％ siccity) and can be easily stored on site. Operating costs can be lowered by 50 ％ with decreasing the frequency of membrane cleanings and the concentrate volumes, which must be post-treated.
landfill leachate reverse osmosis ultrafiltration lime treatment rotary drum vacuum precoat filter chemical engineering
S.Renou J.G.Givaudan S.Poulain P.Moulin
Département de Technologie Nucléaire, Commissariat à l’Energie Atomique de Cadarache, 13108 St Paul- Université Paul Cézanne Aix Marseille, Département en Procédés Propres et Environnement (DPPE – UMR
国际会议
The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)
北京
英文
2007-10-14（万方平台首次上网日期，不代表论文的发表时间）