摘要
天津市城市污水自由水面构筑物湿地处理系统中,污水氮的去除效果受到场地坡长、水力负荷、停留时间、温度、预处理水质等因素的影响,本文根据试验场地实际运行的数据,讨论了上述因素与污水氮去除率的关系.结果表明,系统对污水氮的去除率,与坡长在一定范围内呈正线性相关关系;与水力负荷呈负的线性相关关系;停留时间为78h时除氮效果最佳;温度对氮去除率的影响随着季节的变化表现出来,没有直接规律性;预处理水质对系统的除氮能力没有影响.
Some factors, such as slope length, water load, water remaining time, temperature, quality of wastewater, etc. , have affected the elimination rate of nitrogen in wastewater in free water construction system of Tianjin city. This article has discussed the relations between the factors mentioned above and the elimination rate of nitrogen in wastewater according to the field operation data. The results show that the elimination rate of nitrogen in wastewater in FWCS is directly correlated to slope length within some range, and inversely to water load. Seventy-eight hours is the best water remaining time- The temperature influences the elimination rate of nitrogen in wastewater through the change of seasons. The quality of pre-treated water doesn't change the ability of nitrogen elimination of FWCS.
出处
《环境化学》
CAS
CSCD
北大核心
1996年第6期516-522,共7页
Environmental Chemistry
关键词
自由水面构筑物
氮
去除率
城市污水
湿地处理
FWCS, K-nitrogen, water load, elimination rate, water remaining time.
