【作者】 肖海文；

【导师】 邓荣森；

【作者基本信息】 重庆大学 ， 环境工程， 2001， 硕士

【摘要】 随着城市化进程的加快，城市景观水体的整治与改善问题日益受到关注。本试验作为成都“城市花园”小区景观渠水处理方案的中试研究，旨在寻找一种既简便易行，又合乎城市生态要求的处理工艺来促进受污染城市景观水体水质的改善。本文提出了将传统的砂石过滤与湿地塘床相结合的组合处理工艺——生物滤沟，并对其在常温下处理受污染城市河水的性能进行了试验研究。实验内容包括：生物滤沟的启动、生物滤沟在常温下处理受污染河水的运行性能及有关参数对处理效果的影响。 试验结果表明，生物滤沟采用多级跌水的自然曝气方式是成功的，能有效的控制出水的嗅味、氨氮值和提高有机物的去除效果。改进后的生物滤沟在16～24℃的条件下采用自然挂膜启动方式，60d左右完成启动过程。生物滤沟的运行性能试验根据不同的水力停留时间(HRT)设定了5种运行工况，试验结果表明，有机物的去除率随HRT的减小而降低，当HRT大于8.2h，有机容积负荷小于0.1665kgCOD／m~3．d时，生物滤沟有稳定的去除效果，COD的去除率在56％以上，出水COD值小于24mg／L，SS的去除率在80％以上，出水SS值小于15mg／L，能满足V类水质标准。另外，生物滤沟对氮、磷也有一定的去除效果，TP的去除率在40％以上，但氨氮去除率仅为30％左右，试验结果表明溶解氧分布不均是氨氮去除率低的一个重要原因。更多还原

【Abstract】 A new approach --Biological Infiltration Gallery (BIG) is proposed in this paper for the enhancement of urban polluted landscape water. The approach uses a unit process with the characteristic of both traditional sand filter and wetlands. Study in this paper include start-up the BIG under condition of natural temperature performance of the BIG treating polluted urban stream water and the effects of the parameters correlated to the BIG.The result demonstrate that aeration by multilevel weirs of the BFG can improve the water quality of effluent, especially can effectively decrease the odour and organic contaminants in water. It takes about 60d to complete the BIG start-up under the temperature of 16~25癈 without seed sludge or sewage. HRT is an important factor that affects the performance of BFG, the result indicate that when HRT is above 8.2h and organic volume loading is below 0.1665kgCOD/(m3. d) ,COD removal efficiency can stabilize above 56% and COD of effluent is below 24mg/L, and SS removal efficiency can stabilize above 80% and SS of effluent is less than 15mg/L Moreover , N, P can also be removed by BIG to some degree , the removal efficiency of TP is above 40%, but removal efficiency of NH3-N is only 30%, results of the research indicate that uneven distribution of dissolved oxygen in BIG is the main reason which leads to lower removal efficiency of NHrN.更多还原