【作者】 周金娥；

【导师】 姜应和；

【作者基本信息】 武汉理工大学 ， 市政工程， 2005， 硕士

【摘要】 城市景观水体作为城市生态系统的重要组成部分,城市生态系统的初级生产者和生态平衡的调控者,在城市生态化建设中日益显示出其不可替代的功能和意义。与此同时景观水体的污染现状日趋严重,对于受污染景观水体的治理显得非常必要。本课题研究旨在为城市景观水体的治理开发一种简易、有效并能充分与城市自然生态系统相结合的水处理技术。 景观水体的水质维护主要是控制水体中的COD、BOD₅、TN、TP等污染物的含量及藻类等的生长,保持水体的清澈、洁净和整个水域的水质。本研究采用的是狗牙根草种植的人工绿地系统处理武汉市东湖的湖水。人工绿地对富营养化景观水的净化试验研究结果表明: （1） 试验期间人工绿地对受污染景观水具有较好的净化效果,能够使景观水体的质量得到一定的改善和提高。水质净化效果因温度和季节的变化、水力负荷的大小及植物生长状况的优劣而表现出一定的差异。就总体平均去除率来看,COD的去除率为52.1%,TN的去除率为62.2%,TP的去除率为41.3%。COD和TN的出水水质不论在何种情况下相对于进水的水质都能提高至少1～2类水体级别。 （2） 水力负荷是影响人工绿地净化效果的重要参数。本试验设计了五个较小的水力负荷值,综合各水力负荷下对污水的净化效果和实际工程应用中的经济性因素的考虑,认为本试验合理的水力负荷为0.3m³/m²·d。 （3） 人工绿地上的植物在污水处理过程中发挥着重要的作用。植物不仅能有效的净化污水,还能起到绿化、美化景观的效果,具有良好的生态效益。本试验选择的植物较适宜武汉的气候条件,并且绿色期较长,可作为热带及亚热带地区人工绿地用于景观水处理的植物种类选择。 人工绿地生态工程可以推广应用于受污染城市景观水体、“城市花园”小区内的景观水、城市径流、城市污水处理厂一、二级出水的深度处理及农业径流等方面。更多还原

【Abstract】 The cityscape water body regarded as the important component and elementary producers of the urban ecosystem and as the regulation and control of ecological balance person demonstrated its irreplaceable function and meaning day by day in urban ecology construction. Meanwhile, its water quality was polluting seriously day by day, and it was very essential to control its pollution situation. This subject aimed at developing an easy、 effective and combined with city natural ecosystem wastewater treatment technology for cityscape water body .Protecting landscape water body mainly controlled its content of COD、 BOD5、 TN and TP and the growth of algae. Keeping it clean and the whole water quality. This research was about constructed green land system treating East Lake of Wuhan planting Bermuda grass. Results showed:(1) Constructed green land had better purifying effect to landscape water polluted while testing, could improve its water quality at little. The purification efficiency varied in line with temperature and seasons, hydraulic loading values and the growth of plant. The total removal rates of COD、 TN and TP were 52.1%> 62.2% and 41.3% separately. The effluent of COD and TN could be improved 1~2 grades of water body at least no matter in which situation for influent.(2) Hydraulic loading was an important parameter influencing purifying effect of constructed green land. This test had designed five smaller hydraulic loading value, synthesizing their purification results and considering economic factor in actual project, 0.3m3/m2 · d was rational to this test.(3) The plant of constructed green land played an important role in treating wastewater. It could purify sewage effectively, also afforest and beautify the view, which had good ecological benefits. The plant chosen in this test was relatively suitable for the climate of Wuhan, and had relatively long green issue, could be as a choice for plant species of constructed green land treating landscape water in tropical and subtropical area.Constructed green land could be widely applied to urban landscape water body polluted, "city garden" landscape water, effluent of sewage treatment plant, urban and agricultural surface flow, etc.更多还原