Study on A_2O method for co-treatment of landfill Leachate and Municipal Sewage

摘要

To solve the problem of huge investment and high difficulty of individually treating landfill leachate, the experiment adopted A_2O simulated wastewater treatment plant to treat landfill leachate combined with municipal sewage. Under the conditions of 11h HRT, 1.0-2.0mg/L DO concentration, 200% mixture reflux proportion, 80% sludge reflux proportion and 20d sludge age, adding langdfill leachate to municipal sewage with the proportion of 1:1500, 1:1000 and 1:600, the effluent concentration can achieve the first order A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. When the proportions come to 1:400 and 1:200, the effluent quality can't reach the standard. After a comprehensive consideration of water quality and landfill leachate treatment amount in practice, we can draw a conclusion that the 1:600 proportion is the most suitable one of adding landfill leachate to municipal sewage.