摘要
在我国干旱地区对潜流式人工湿地系统进行了15个月的现场考察,研究了在干旱地区特殊气候和环境的条件下潜流式人工湿地系统全年运行的特点和规律,并分析了在干旱地区水力停留时间和植物收割对于人工湿地污水净化效果的影响规律。结果表明,在气候条件恶劣,昼夜温差变化显著,季节性差异大的干旱地区,潜流式人工湿地依然可以正常运行,取得良好的出水效果。全年对COD、BOD5、氨氮和总磷的平均去除率分别为78.3%、61.1%、46.4%和66.2%;在干旱地区水温的降低和植物收割都会导致人工湿地系统对有机物和氨氮的去除能力下降,而对总磷的去除的影响不明显;改变水力停留时间(HRT)可以改变人工湿地系统的供氧状况,而增加水力停留时间使有机物、氨氮、总磷的去除率都表现出先增加后减少的变化趋势。
A investigation in trial operation of subsurface flow constructed wetland system for 15 months was carried out in an arid area of our country. The characteristics and regulations of the system operating in a whole year under special climatic and environmental conditions were studied,and the effect of hydraulic retention time （HRT） and plant harvest on sewage purification in the constructed wetland was analysed. The results showed that, in the arid area with severe climate, marked temperature difference between day and night, and great seasonal difference, the subsurface constructed wetland system could operated normally still; the effluent quality was better; the averaged removal rates of COD,BOD5, ammonia-nitrogen and TP were 78.3%,61.1%,46.4% and 66.4% respectively;water temperature lowering and plant harvesting both could lead to the removal rates of organics and ammonia-nitrogen lowering in the constructed wetland, while the effect on TP removal was less; changing HRT could change the oxygen supply condition while increasing HRT could make the removal rates of organics, ammonia-nitrogen, TP first increasing, then decreasing.
出处
《水处理技术》
CAS
CSCD
北大核心
2007年第10期42-45,共4页
Technology of Water Treatment
关键词
干旱地区
人工湿地
运行情况
温度
水力停留时间
植物收割
arid area
constructed wetland
operational condition
temperature
HRT （hydraulic retention time）
plant harvest
