摘要
将复合菌技术与膜生物反应器结合处理校园生活废水,考察其污泥减量的效果。试验结果表明,反应器内MLSS的质量浓度由投加微生物前的9000mg·L-1降到了投加后的5000mg·L-1,MLSS降低了44.4%,MLVSS同MLSS的变化基本一致;m(MLVSS)/m(MLSS)的变化不是很大,投加微生物后的m(MLVSS)/m(MLSS)较没投加前的平均0.83略有提高;而对COD、NH4+-N、TP的平均去除率分别由未投加时的93.78%、78.38%、75.56%增大到96.03%、88.25%、84.79%,所有指标都有所提高。研究表明,利用膜生物反应器(MBR)对泥水高效分离的特点,通过投加复合菌剂,抑制了不利菌和"无用菌"的生长,改善污泥性能和代谢活性,可以在实现MBR污泥零排放的同时,提高系统的去污能力。
The efficiency of sludge reduction ofa MBR which was added with hybrid bacteria was investigated while it was used for treating schoolyard domestic wastewater. The results revealed that after addition of hybrid bacteria into the MBR, the MLSS decreased from 9 000 mg·L^-1to 5 000 mg·L^-1, by 44.4%, the change of MLVSS is the same as MLSS; The average removal rates of COD, NH4^＋-N and TP are all increased from 93.78%, 78.38%, 75.56% to 96.03%, 88.25%, 84.79%, respectively. Both the ratio of MLVSS/MLSS and the average removal rates of contaminants indicated that by addition of hybrid bacteria into MBR, the growth of disadvantageous bacteria could be inhibited, and the sludge activity could be improved greatly. Hence, the removal efficiency of contaminants could be improved, and zero sludge production could be achieved simultaneously.
出处
《水处理技术》
CAS
CSCD
北大核心
2009年第12期98-101,共4页
Technology of Water Treatment
基金
广东省教育部产学研结合项目(2008B090500224)
东莞市科技计划项目(2008108101015)
关键词
复合菌剂
膜生物反应器
污泥减量
hybrid bacteria
membrane bioreactor（MBR）
sludge reduction
