蚯蚓生物滤池处理剩余污泥的效果
杨 健*,易当皓,赵丽敏,邓德汉 (同济大学环境科学与工程学院,上海 200092)
中国环境科学 2008,28(10)：892~897 China Environmental Science
摘要：以上海市某污水厂剩余污泥为研究对象,对未投加蚯蚓的生物滤池(CBF)和投加蚯蚓的生物滤池(EBF)处理城市剩余污泥的效果进行了比较. 结果表明, EBF 的悬浮固体浓度(SS)减量率、挥发性悬浮固体浓度(VSS)减量率分别可达49.5%~55.6%和60.0%63.2%,比CBF 分别提高了14.4%~21.7%和22.3%~26.4%. EBF 的出泥VSS/SS,污泥的沉降性比(SVI), 污泥比阻(SRF)分别由原泥的64.8%, 103.4mL/g,5.19×1011m/kg 降至51.8%, 8.4mL/g, .00×1011m/kg,而CBF 的出泥VSS/SS、SVI、SRF 则分别为61.0%, 51.8mL/g, 4.12×1011m/kg. 通过蚯蚓－微生物协同作用可以显著提高剩余污泥的减量化和稳定化效果,还能较好地优化污泥的沉降性能、脱水性能.
关键词：剩余污泥处理；效果；污泥减量化；污泥稳定化；蚯蚓-微生物协同作用
中图分类号：X703.5 文献标识码：A 文章编号：1000-6923(2008)10-0892-06
Effect of excess sludge treatment in earthworm bio-filter
YANG Jian*, YI Dang-hao, ZHAO Li-min, DENG De-han
(State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China). China Environmental Science, 2008,28(10)：892~897
Abstract：Treatment of excess sludge from a municipal wastewater treatment plant in Shanghai was studied to evaluate the control bio-filter (CBF) and earthworm bio-filter (EBF) processes. Reduction of SS and VSS in EBF were in range of 47.6%~55.3% and 58.1%~63.7%, respectively, which were 14.4%~21.7% and 22.3%~26.4% higher than that of CBF. The VSS/SS, SVI and SRF of raw sludge could be reduced from 64.8%, 103.4mL/g and 5.19×1011m/kg to 51.8%, 38.4 mL/g and 2.00×1011m/kg respectively for EBF, while 61.0%, 51.8mL/g and 4.12×1011 m/kg for CBF. It was concluded that the reduction and stabilization as well as the settling and dewatering characteristics of excess sludge could be significantly improved by synergistic action between earthworms and microorganisms in EBF.
Key words：excess sludge treatment；effect；sludge reduction；sludge stabilization；synergistic action between earthworm and microorganism