ANAMMOX过程中污泥膨胀的原因分析及消除办法  

Analysis and Solution of Filamentous Sludge Bulking during ANAMMOX

作　　者：吕永涛[1] 孙红芳[1] 王磊[1] 叶向德 王志盈[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]延安市环境科学研究所,陕西延安716000

出　　处：《中国给水排水》2008年第17期67-70,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50178059)

摘　　要：在厌氧生物转盘系统中成功培养了ANAMMOX菌及颗粒污泥，实现了厌氧氨氧化的稳定运行。当进水氨氮和亚硝酸盐氮的容积负荷均为0．051kg／（m^3·d）时，系统对两者的去除率分别达到了98．15％和99．56％。为节省能耗，将系统温度由40～41℃降至35℃，2d后反应器发生了丝状菌污泥膨胀问题，直接表现为对氨氮和亚硝酸盐氮的去除率不断下降；镜检发现污泥结构松散，出现了大量的丝硫菌。试验结果表明，硫酸盐还原菌和丝硫菌发生链式协同作用，导致丝硫菌过量繁殖和污泥流失。通过采取停止向试验进水中投加有机物并同时升温的措施，有效抑制了丝状菌的生长，恢复了ANAMMOX菌的活性。ANAMMOX bacteria and granular sludge were cultivated in anaerobic rotating biological contactor, and the stable operation of ANAMMOX was realized. When the influent loadings of ammonia nitrogen and nitrite nitrogen are both 0.051 kg/（ m^3·d）, their removal rates are 98.15% and 99.56% respectively. To save energy, the temperature was decreased from 40 -41 ℃ to 35 ℃, but two days later, filamentous sludge bulking happened with the falling of removal rates of ammonia nitrogen and nitrite nitrogen. The microscopic examination shows that the structure of the sludge is loose and also lots of filamentous sulfur bacteria are found. The analysis indicates that the excessive reproduction of the filamentous sulfur bacteria and the sludge loss are caused by the synergistic reaction of sulfate-reducing bacteria and filamentous sulfur bacteria. After the temperature rises and the addition of organic matters into the influent is stopped, the growth of filamentous sulfur bacteria is inhibited effectively and the activity of ANAMMOX bacteria is recovered.

关 键 词：厌氧氨氧化 污泥膨胀 硫酸盐还原菌 

分 类 号：X703.1[环境科学与工程—环境工程]