CAST+A工艺的污泥减量及除污效能研究  

Sludge Reduction and Pollutant Removal Performance in CAST/Anaerobic Tank Process

作　　者：王少坡[1,2] 魏天兰[1,2] 于静洁[1,2] 邱春生[1,2] 崔晓宇[1,2] 孙力平[1,2] 

机构地区：[1]天津城市建设学院环境与市政工程学院,天津300384 [2]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》2013年第1期39-42,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51108299);天津市自然科学基金资助项目(10JCYBJC05300);天津市水质科学与技术重点实验室开放基金资助项目(TJKLAST-2011-10)

摘　　要：在CAST工艺的污泥回流段加入一个厌氧反应罐而构成CAST+A工艺,并通过调节厌氧反应罐的停留时间分别为6、9和12 h,考察其污泥减量效果。两个月的监测表明,该工艺在不同停留时间下的污泥产率系数分别稳定在0.33、0.17和0.20 gMLSS/gCOD,相对于CAST工艺其减量率分别为21.42%、59.52%和52.38%。经分析,污泥衰减是实现污泥减量的主要原因。加入厌氧反应罐后,对去除COD和氨氮的影响较小,对总氮的去除效果有所改善,除磷效果则随停留时间的延长而逐渐降低。An anaerobic tank was added in the sludge return section of a CAST process to create a CAST/A process. The sludge reduction in the CAST/A process was investigated by regulating the residence time of the anaerobic tank to 6 h, 9 h and 12 h. The results from two months of monitoring showed that the sludge yield coefficients were stabilized at 0.33,0.17 and 0.20 gMLSS/gCOD for the three resi- dence times. The corresponding sludge reduction rates were 21.42% , 59.52% and 52.38%. By analy- sis, sludge decay was the main cause of achieving sludge reduction. After adding the anaerobic tank, the removal of COD and ammonia nitrogen was little affected, while the removal efficiency of TN was im- proved. However, the phosphorus removal efficiency was gradually reduced with increasing the residence time in the anaerobic tank.

关 键 词：CAST工艺 污泥减量 污泥衰减 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]