Abstract:

An SBR-sludge reduction and simultaneous phosphorus recovery system was constructed. When the anaerobic residence time was 8 d, the amount of CaO₂ added was 0.1 g/gVSS, and the initial sludge concentration was 10 400 mg/L, the sludge reduction (in terms of TS) of the pool Ⅰ reached 20%. When the remaining sludge of SBR was distributed in pools Ⅰ and Ⅱ at the ratio of 4:6, the total dissolved phosphorus in the sludge supernatant increased from 2mg/L to 8 mg/L. When the initial pH was 9, the Ca/P substance ratio was 2.7, and the reaction time was 65 min, the phosphorus recovery rate in the sludge supernatant reached 95%. The total phosphorus emission reached level A of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18198-2002).

Key words: excess sludge, sludge reduction, simultaneous recovery of phosphorus

摘要：

构建SBR-污泥减量及同步回收磷系统，当厌氧停留时间为8 d，CaO₂投加量为0.1 g/gVSS，初始污泥质量浓度为10 400 mg/L时，Ⅰ池污泥减量（以TS计）达20%。SBR剩余污泥在Ⅰ、Ⅱ池的分配比为4：6时，污泥上清液溶解性总磷从2 mg/L增加到8 mg/L。当初始pH为9、Ca/P物质的量比为2.7、反应时间为65 min时，污泥上清液中磷回收率达到95%，总磷排放达《城镇污水处理厂污染物排放标准》（GB 18198—2002）一级A标准。

关键词: 剩余污泥, 污泥减量, 同步回收磷

CLC Number: 

• X703