基质强化型潜流人工湿地净化景观水的研究  

Treatment of Landscape Water by Subsurface Flow Constructed Wetland with Mixed Substrates

作　　者：刘红美[1] 李春杰[1] 吴德意[1] 董阳[1] 孟莎[1] 谢杰[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《中国给水排水》2013年第1期6-10,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07105-003-03;2012ZX07105-002-03);交通部科技项目(2009-353-333-340)

摘　　要：以天然沸石和水化硅酸钙为材料,构建新型潜流人工湿地装置,并与传统的砾石型潜流人工湿地装置进行对照,研究其净化低污染景观水的效果。在水力负荷为0.3 m3/(m2.d)的条件下连续运行8个月,基质强化型潜流湿地对浊度、COD、TN、氨氮、TP的去除效果均明显高于传统的砾石床潜流湿地,且去除效果较为稳定。其对浊度的去除率为70.4%～95.9%,对COD的去除率为33.3%～92.1%,对TN的去除率为27.6%～54.0%,对TP的去除率为59.0%～75.8%。将水力负荷提高到0.6和1.2 m3/(m2.d)时,对各指标的去除率均降低,但浊度的降幅较小,COD、TN和TP的降幅较大。因此,如果以改善景观水体透明度为目的,可以考虑采用高水力负荷;而如果以营养盐的去除为目的,则采用低水力负荷运行为佳。Natural zeolite and calcium silicate hydrate were used as mixed substrates in subsurface flow constructed wetland （SFCW） to investigate the treatment efficiency of micro-polluted landscape water. A traditional SFCW with gravel was used for comparison. During continuous operation at hydraulic loading rate （HLR） of 0.3 m3/（ m2 · d） for eight months, the removal efficiencies of turbidity, COD, TN, NH4＋ - N and TP in the SFCW with mixed substrates were much higher than those in the traditional SFCW with gravels. The removal rates of turbidity, COD, TN and TP were 70.4% to 95.9% , 33.3% to 92.1% , 27.6% to 54.0% and 59.0% to 75.8% , respectively. The removal effieiencies of all the pol- lutants were decreased when HLR was increased to 0.6 and 1.2 m3/（m2 ·d）. The impact on turbidity was small but the impact on COD, TN and TP was large. High HLR could be adopted for the purpose of improving the transparency of water while low HLR would be better for nutrients removal.

关 键 词：景观水 潜流人工湿地 基质 天然沸石 水化硅酸钙 

分 类 号：X703[环境科学与工程—环境工程]