酸碱联合调节剩余污泥过程中磷的释放及形态转化  

Release and Speciation of Phosphorus during Joint Control of Excess Sludge with Acid and Base

作　　者：苑宏英[1,2] 祁丽[1,2] 吴丽杰[1,2] 宋建阳[1,2] 汤韬[1,2] 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津城建大学天津市水质科学与技术重点实验室,天津300384

出　　处：《中国给水排水》2014年第3期69-72,共4页China Water & Wastewater

基　　金：天津市滨海新区科技计划项目(2011-BH14003);国家水体污染控制与治理科技重大专项(2008ZX07314-005)

摘　　要：分别采用先酸（pH值=3．0）后碱（pH值=10．0）、先碱（pH值=10．0）后酸（pH值=3．0）的两段控制方式（每段反应8d），同时做pH值不调节的对比试验，研究剩余污泥中磷的释放速率及其形态转化情况。结果表明，酸性调节更有利于磷的释放，而碱性调节对钙磷和弱吸附态磷的赋存有利；磷的释放速率在1～2h内达到最大，这有利于短期内获得高浓度的PO4^3--P；铝磷是剩余污泥中磷的主要赋存形态。Two-stage control modes composed of acidity control （pH 3.0） for 8 d followed by al- kalinity control （pH 10.0） for 8 d and alkalinity control （pH 10.0） for 8 d followed by acidity control （pH 3.0） for 8 d, with pH uncontrolled as blank test, were used to study the release and speciation of phosphorus in excess sludge. The results showed that the acidity control was beneficial to the release of phosphorus, while alkalinity control was advantageous to the accumulation of calcium phosphorus （Ca-P） and labile phosphorus. The release velocity of phosphorus reached the optimum within 2 h, which was beneficial for acquiring the high concentration of orthophosphate. Aluminum phosphorus （A1-P） was the primary form of phosphorus.

关 键 词：酸碱联合调节 剩余污泥 磷释放 形态转化 

分 类 号：X703[环境科学与工程—环境工程]