中文摘要：

在不同填料和植物对污水中氮磷去除的研究的基础上,通过填料-微生物-植物对二级出水中氮磷去除特点构建了组合式人工生态系统,并用本组合式人工生态系统在杭州地区较低温度条件下对实际二级出水中氮磷去除效果进行了考察。结果表明,本组合式人工生态系统在较短的水力停留时间内,对二级出水中CODCr、氨氮、总氮和总磷都有较好的去除率。在本实验5个月期间,TP去除达97%以上,TN去除率达90%以上,NH4^＋-N去除率达98%以上,CODCr去除率达91%以上。

英文摘要：

Nitrogen （N）and phosphorns （P）in secondary effluent often cause eutrophication of reiceiving water body. Nitrogen present mainly in form of ammonium under low temperature, which is toxic to organisms. Constructed wetland is one of the most effective technologies for removal of N and P from secondary effluent. However, N removal rate by constructed wetlands is low under low temperature, and a long hydraulic retention time（4-7 d ）is required. Substrates play an important role in P removal by constructed wetlands. While N removal by constructed wetlands is mainly governed by nitrification and denitrification processes. Plant removal of N and P is critical for highly contaminated water body by these elements. A combined ecological system was designed based on former studies with different substrates, microbe, and plants with respect to their removal efficiencies for N, P and heavy metals and the properties of secondary effluent. The combined ecological systems were performed at short hydraulic retention time for five months. The results showed the combined ecological systems had an excellent removal rates for CODCr, NH4^＋-N, TN and TP. The removal rate is〉91% for CODCr,〉98% for NH4^＋-N3〉90% for TN, and〉97% TP.