蚯蚓生态滤池对不同布水方式下污水去除效果研究  

THE STUDY ON POLLUTANTS REMOVAL IN DOMESTIC WASTEWATER TREATMENT USING EARTHWORM ECOFILTER UNDER DIFFERENT WASTEWATER DISTRIBUTIONS

作　　者：汪龙眠[1] 郭飞宏 郑正[3] 罗兴章[3] 

机构地区：[1]环境保护部南京环境科学研究所,江苏南京210042 [2]上海市环境科学研究院,上海200333 [3]复旦大学环境科学与工程系,上海200433

出　　处：《水处理技术》2014年第4期87-91,共5页Technology of Water Treatment

基　　金：2013年中央级公益性科研院所基本科研业务专项;国家"十二五"重大水专项(2012ZX07101-007)

摘　　要：考察了不同布水条件下蚯蚓生态滤池对生活污水中COD、NH3-N、TN和TP的去除效果。结果表明，各布水方式下COD、NH3-N、TN和TP均有较高的去除，总出水去除率分别为84．1％～94．1％、94．2％～98．3％、70．3％～84．1％和96．9％～98．6％，土壤是污染物去除的主要介质层，尤其是上层土壤（0～25cm）作用明显，经上反应层后COD、NH3-N、TN和TP去除率已达82-3％～93．1％、86．2％～88．9％、72．2％～79．0％和63．2％～68．2％，后续黄沙层对NH3-N和TP有一定去除效果，碎青石层对有机物和营养物去除基本无作用。研究还发现土壤下层；次布水方式下总出水中COD和TN去除率显著高于其它布水方式，与传统布水方式相比，下层土壤二次布水总出水COD和TN平均去除率分别提高了7.3和5．7个百分点；布水方式对NH3-N和TP去除无显著影响。The removal efficiencies of COD, NHrN, TN and TP in domestic sewage using earthworm ecofilter under different wastewater distributions were investigated. The results showed that high removal rates of COD, NH3-N, TN and TP were presented, which were in the range of 84.1 %～94.1 %, 94.2%～98.3%, 70.3%～84.l % and 96.9%～98.6%, respectively. Soil played a main role in pollutant removal, especially the upper layer （0-25 cm）, and after passing the top layer the removal efficiencies of COD, NHrN, TN and TP for synthetic domestic wastewater treatment were 82.3%～93.1 %, 86.2%～ 88.9%, 72.2%～79.0% and 63.2%～68.2%, respectively. Subsequently, the sub-layer （sand） had positive effect on NH3-N and TP removal, but the detritus layer were not likely to be useful for decreasing organic matter and nutrients for wastewater treatment, This study also found the COD and TN removal efficiencies in second wastewater distribution way oflower soil were significantly higher than those in other wastewater distribution modes. The removal rates of COD and TN were increased by 7.3 and 5.7 percentage point at final eftluent in secondary wastewater distribution of lower soil than those in traditional distribution method. Moreover, sewage distribution had no significant impact on NH3-N and TP removal rates.

关 键 词：生活污水 蚯蚓生物滤池 脱氮除磷 

分 类 号：X703.1[环境科学与工程—环境工程]