城区景观水体生态重建中水生植物和光催化反应器的应用

城区景观水体是居民观赏、休闲、及娱乐的场所，对美化城市人居环境、净化空气、调节区域温度等具有积极作用。由于面源污染等因素，目前中国城区景观水体氮、磷营养盐含量高，藻类泛滥，水生生态系统单一，大多呈现富营养化状态。本文以广州市某景观湖泊为案例，利用低扬程水泵推流，使景观水体形成环流。部分环流经过固载型TiO2光催化反应器、人工湿地处理，再和环流水体汇合。研究表明，光催化反应器具有很强的杀藻能力，同时减少了藻类在后续人工湿地的沉积，提高了人工湿地对有机物、氮、磷等污染物的去除效果。通过近二年的研究和运行维护，有效地遏制了浮游植物的泛滥，景观水体的水质得到改善，水体生态系统多样性得到一定程度的恢复。

Application of Aquatic Plant And Photocatalytic Reactor on Landscape Water Ecosystem Reconstruction

The city landscape water body provided resident a place for leisure, and have have a positive effect on air cleaning and temperature adjusting. At present because of non- point source pollution, the water body＇s nitrogen and phosphorus content are high, algae outbreaks and Aquatic ecosystems is single. The water body is in eutrophication state. This article introduced the ecosystem reconstruction process in the city landscape water body,pump was used to make the water circulation, partial circula- tions passed through artificial wetland and TiO2 - Supported - photocatalytic reactor. The research indicated that the photocatalytic reactor can kill the algae effectively and reduce the algae deposition in the following wetland, enhanced the wetland removal rate of organic matter, nitrogen, phosphorus. Through two years research and running, the landscape water quality were improved, water ecological diversity were restored.