【摘要】 利用串联运行的阶式水生植物床净化富营养化河水。考察了不同形态的氮磷在处理前后的浓度变化,在此基础上阐述水生植物床去除富营养化水体中氮磷的过程与机理。在水力负荷为74cm/d的条件下,总磷和总氮的去除率分别达73.1%和64.5%。植物根系对悬浮物的截留对去除河水中的氮磷起关键作用。采用多级串联的运行方式能有效克服一般湿地运行一段时间后因沉积物释放作用而引起处理水溶解性营养盐浓度上升的难题。更多还原

【Abstract】 By using three-stage series-operation of aquatic-plant bed system to purify eutrophicated river water, the concentration variations of different nitrogen and phosphorus species of inflow and outflow were investigated. The processes and mechanisms of nitrogen and phosphorus removal from eutrophicated river water by aquatic-plant bed system were elucidated. The removal rates of total phosphorus and total nitrogen reached 73.1% and 64.5% respectively under the hydraulic loading rate of 74 cm/d. The function of root mat blocking suspended solid played a key role in removing nitrogen and phosphorus from river water. The style of series-operation overcame the shortcoming of common wetland that soluble nutrient concentrations in effluent arisen causing by sediment release after operating for a long time.更多还原