导流板厌氧/限氧循环反应器的污泥减量效果研究  

Sludge Reduction in Anaerobic/Oxygen-limited Circulation Reactor with Guide Plate

作　　者：许晓毅[1] 谢恩[1] 罗固源[1] 阕添进[2] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]中国市政工程西南设计研究院,四川成都610081

出　　处：《中国给水排水》2010年第11期29-33,共5页China Water & Wastewater

基　　金：国际科技合作项目(2007DFA90660);重庆市科委项目(CSTC;2008BB7305;2008AB7133)

摘　　要：基于弧形导流板厌氧/限氧混合液半循环反应器,进行了不同工况条件下污泥减量效果的正交试验。结果表明,反应器中污泥混合液的循环速度对污泥减量效果的影响相对较大,且污泥减量反应器的较佳运行条件为:循环速度为0.2 m/s,限氧区DO为1.0 mg/L,HRT为8 h。将减量反应器嵌入A/O脱氮系统的污泥回流旁路,进行了处理生活污水的连续流试验。嵌入减量反应器前后,A/O系统对COD的去除率相差不大,对TN的去除率增加,对TP的去除率受排泥量减少的影响而略微下降。嵌入减量反应器后A/O系统的污泥产率为0.23 gMLSS/gCOD,较对照系统减少约34.0%,污泥脱氢酶活性的平均值提高了约5.6%。经分析,污泥减量反应器的污泥减量机制主要为解偶联作用,其次为污泥在缺乏营养物时进行的代谢衰竭与溶胞。减量反应器中特殊的厌氧/限氧混合液循环,可使其在相对较短的停留时间下就能取得较好的污泥减量效果。Based on the anaerobic/oxygen-limited mixture semi-circulation reactor with arc guide plate, orthogonal experiments on sludge reduction under different conditions were carried out. The experimental results show that the circulation rate of sludge mixture has an important effect on sludge reduction. The optimal operation conditions are as follows ： circulation rate is 0.2 m/s, DO in oxygen-limited zone is 1.0 mg/L, and HRT is 8 h. Continuous flow tests for domestic sewage treatment were carried out by setting the reactor in the sludge return bypass of A/O denitrification system. Compared to the control process, COD removal rate shows little difference, While TN removal efficiency increases and TP removal efficiency decreases slightly due to the reduction of sludge discharge. The sludge yield in the A/O system after setting sludge reduction reactor is 0.23 gMLSS/gCOD, being 34.0% less than that in the control system. The average dehydrogenase activity is increased by 5.6%. The sludge reduction mechanism is mainly uncoupling followed by mechanism failure and lysis of sludge in lack of nutrient. The special anaerobic/oxygen-limited mixture circulation in the reactor can achieve excellent sludge reduction effect at relatively short residence time.

关 键 词：厌氧/限氧半循环 污泥减量 污泥产率 

分 类 号：X703[环境科学与工程—环境工程]