Treatment Of Landfill Leathate By UASCB-SMBR

Landfill leathate is a kind of serious polluted organic waste water with highconcentration of organic substance ,ammonia nitrogcm and poisonous and harmfull substance. Landfill leathate has high concentration of BOD5, COD, SS, TN metallic iron and chroma than uasual domestic sewage. The quality of Landfill leathate is various with the difference of the ages of landfill leathate,cutoms of persons in different areas, garbage component, scale of landfill, rainfull and temperature, so it is difficult to dipose. The study in this area is very hot.The process of combined upflow anaerobic sludge compound bed (UASCB) and sequencing membrane bioreactor (SMBR) were given through the investigation of meastures of disposing landfill leathate. Through the experimentation we can conclude as follow:1) After the success of domestication of anaerobic reactor, the landfill leathate diluted by lOtimes, Stimes, 6times, Stimes and 4times was took into reactor.When the follow was 0.5L/h, the rate of removing was between 45% and 55%. The step of anaerobic reaction becomes "step of fire damp" from "hydrolysis".2) In the experment, at temperature 30C, DO 2. 5mg/L, PH8. 0, in the way of 2. 5 h aerobic time and 1.5h anoxemia time,effluent quality is very good.3) The membrance module in MBR has a little fuction in cutting large-molecule organic matter. In this esperiment, the removal rate of large-molecule organic matter is 22.9%.4) The best sitution of reaction is that COD is 1700-2300mg/L and the flow is 0.5 L/h.5) The parameter in best situation is : In anaerobic reactor the removing rate of COD is 44.6% and the load of removing is 11.3kg/ m3.d; In MBR the removing rate of COD is 46.7%, the load of removing is 0.3kg/ m3.d, the load of denitrification is 0.055kg/ m3.d, and the load of nitration is 0.058kg/ m3.d, the water out comes up to the II standard of (GB16889-1997) .6)The biodegradability of leachate can be improved by 15.2% through the anaerobic reactor.The device of treating landfill leathate by UASCB-MBR has been introductory established and the results from the expermentation established the base for the next search.