To Dispose Of Leachate By Means Of Physical Chemistry And Recycling It To The Landfill

The refuse landfill leachate has a high concentration of organic compounds. Also,its ingredient is complicated and changes often.So that,the landfill leachate processing is not easy.Sometimes,secondary pollution is generated by refuse disposal.Acoording to domestic and international references and consulting the landfill leachate processing technology at home,a physical-chemical tratment method of landfill leachate has been developed.Taking Beijing Adding landfill leachate as an example,the dissolving regularity of pollutant in landfill leachate have been studied and dissolving model was establishea.From that,the quantity per day of landfill leachate could be estimated.It is beneficial to investigate the refuse steady and quality of landfill leachate.Leachate's components are complicated and quality is changfully. The paper takes the fresh leachate gained from Sanitary Landfill of Chang Sheng Qiao and the old leachate from Long Tou Si Landfill as objects . The two landfill are also anaerobic landfill . It takes physical chemistry and recycling leachate to landfill two different methods to dispose lechate separately , and analyses the effency of two methods , can help to instructing the actual projects.In research , It disposes of leachate via mixed chemicals to coagulate , Fenton to oxidize , chemical precipitation to remove ammonia nitrogen , and active carbon to adsorb .To coagulation , it pays attention to the mechanism of coagulation and the best group combined process . To oxydiation method , chemical precipitation to remove ammonia nitrogen , and adsorption by active carbon , it emphasizes the research of mechanism and best process . And gains the best technique of coagulation , oxidation, precipitation and adsorption .To the leachate taking from Chong Qing landfill , discussing the different group combined,it affords group combined of physical chemistry --coagulation- oxydation- chemical precipitation -adsorption process to dispose of leachate . Taking the technique , the leachate from Long Tou Si landfill in Chong Qing can decrease to the National Discharge Secondary Standard ,that is to say CODcr and ammonia nitrogen alao arrive at Secondary Standard .