|Study on Nitrogen Removal of Low Carbon-Nitrogen Ratio Domestic Sewage with Flocculation/Adsorption Sludge as Supplement Carbon Source
|中文关键词: 絮凝污泥 水解酸化液 低碳氮比污水 前置反硝化 脱氮
|英文关键词: flocculation/adsorption sludge hydrolysis-acidification liquor low C/N ratio wastewater pre-denitrification nitrogen removal
| In order to solve the problem of the shortage of carbon source in the biological of nitrogen removal of low C/N ratio wastewater, the biological flocculation adsorption-pre-denitrification BAF combined process has been employed to study the influence on the biological nitrogen removal of low C/N ratio wastewater when the hydrolysis-acidification liquor of flocculation/adsorption sludge was used as addition carbon source. The experimental result showed that the average concentration of COD, NH4+-N and TN in final effluent were 17.57mg/L、1.27mg/L and 10.21mg/L without adding hydrolysis-acidification liquor. And the removal rates were about 77.91%、95.48%、64.52%.When the ratio of flow rates of carbon source to influent was 1:60,the rates of COD/TN in pre-denitrification BAF process was 3.71, and the removal rates of NH4+-N , TN were 96.12% and 79.80%.This research indicated that the hydrolysis-acidification liquor of flocculation/adsorption sludge could be utilized as carbon source for low C/N ratio wastewater，the denitrification performances could be effectively improved by pre-denitrification BAF, and the minimization and resources reuse of flocculation/adsorption sludge could be realized as well.