净化城市径流的净水箱护岸技术

Technology of water purifying box revetment for purification of polluted urban runoff

提出了集防护效果、景观效果、生态效果和净水效果于一体的陡坡净水箱护岸结构。模拟试验表明,净水箱护岸系统在不同进水浓度和不同水力停留时间(HRT)运行条件下,对以氨氮为代表的径流污染物去除效果都是理想的。该结构既可用于岸坡陡直条件下的新建护岸工程,也可用于已建挡土墙护岸改造;既可用于以漫流方式入河径流雨水的净化,也可通过配套设施建设,实现对以管沟方式入河雨水的净化。该结构运行维护成本低,在我国城市有较大的推广价值。

A water purifying box revetment structure integrated with the functions of protection, landscape, ecological restoration and water purification for steep slope is presented herein ; for which the simulation test shows that the effect of the revetment system to remove the pollutants from the runoff mainly represented by ammonia nitrogen is perfect under the conditions of the inflows with different pollutant concentrations and hydraulic retention times. The structure can he applied to both the new revetment project with steep slope and the reconstruction project of the existed retaining wall; which can not only purify the rain water runoff flowing into urban rivers with overland flows, hut can also realize the purification with sewerage conduits or ditches through the construction of accessory facilities concerned. Based on lower operation and maintenance costs, the structure is more valuable to he popularized in China.