| 水力负荷对蚯蚓生物滤池污水处理效果的影响 |
| 摘要点击 3047 全文点击 3744 投稿时间：2007-07-05 修订日期：2007-08-17 |
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| 中文关键词 蚯蚓生物滤池 蚯蚓 水力负荷 摄食能力 |
| 英文关键词 earthworm bio-filter earthworm hydraulic load ingestive ability |
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| 中文摘要 |
| 通过分析不同水力负荷下蚯蚓生物滤池进出水水质以及蚯蚓生存状况，研究水力负荷对蚯蚓生物滤池污水处理效果的影响.结果表明，水力负荷由2.0 m3/(m2·d)增大到6.0 m3/(m2·d)时，蚯蚓生物滤池出水各污染物浓度均缓慢增大，受水力负荷影响较小.当水力负荷增大到6.7 m3/(m2·d)时，滤池出水COD、BOD5、SS、NH+4-N、TP浓度明显增大，出水TN浓度则呈下降趋势，蚯蚓出现严重不适现象.随着水力负荷增大，蚯蚓相对摄食能力呈先升高后降低趋势，水力负荷为4.8 m3/(m2·d)时，蚯蚓相对摄食能力最大，有机物去除效果良好.滤池内蚯蚓平均重量、平均密度、单位面积蚯蚓生物量和水力负荷均呈极显著负相关.推荐蚯蚓生物滤池运行水力负荷4.8 m3/(m2·d)，不宜超过6.7 m3/(m2·d). |
| 英文摘要 |
| Effect of hydraulic load distribution on sewage treatment efficiency of earthworm bio-filter was studied by analyzing influent and effluent of earthworm bio-filter and earthworm behaviors. The results show that when hydraulic load varying from 2.0 m3/(m2·d) to 6.0 m3/(m2·d), the concentration of each pollutant in earthworm bio-filter effluent increases slowly and is little effected by hydraulic load. When hydraulic load reaches 6.7 m3/(m2·d), the concentration of COD，BOD5，SS, NH+4-N and TP in earthworm bio-filter effluent increases obviously, but the TN concentration in effluent presents descending tendency. The earthworms become rather inadaptable to the living conditions at this operating mode. As hydraulic load increasing, the earthworms' relative ingestive ability is improved at first, and then decreases. The earthworms' relative ingestive ability comes to the maximum at hydraulic load of 4.8 m3/(m2·d), with good organic removal efficiency. The relation ships between hydraulic load and average weight，average density，unit-area biomass of the earthworms are significant negative correlation. The hydraulic load of 4.8 m3/(m2·d) is recommended, but not over 6.7 m3/(m2·d). |
