几种经济型人工湿地基质的除污效能分析  

Analysis on Removal Efficiency of Pollutants by Some Substrates in Vertical-flow Constructed Wetland

作　　者：李怀正[1] 叶建锋[1] 徐祖信[2] 

机构地区：[1]上海市环境科学研究院,上海200233 [2]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2007年第19期27-30,共4页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2003AA601020)

摘　　要：采用填料柱模拟垂直潜流人工湿地处理城市生活污水,考察了几种我国常见的、从经济角度考虑可广泛采用的湿地基质——粗砂、瓜子片、砾石、高炉渣、钢渣、煤灰渣对污染物的去除能力和效果。在几种供试的基质中,钢渣和煤灰渣对出水pH值的影响较大,基质粒径越小则对SS的去除效果越好;对有机物去除效果的高低顺序为:砂子>煤灰渣>瓜子片>砾石>钢渣>高炉渣,对氨氮去除效果的高低顺序为:砂子>煤灰渣>瓜子片>高炉渣>砾石>钢渣,6种基质对TP都有较好的去除效果,其高低顺序为:钢渣>煤灰渣>砂子>高炉渣>瓜子片>砾石。Packing columns were used to simulate vertical-flow constructed wetland and treat urban domestic wastewater. The removal efficiencies of pollutants by some substrates in common use in China, including grit, small gravel, large gravel, blast furnace slag, steel slag and coal-ash were investigated. Among these substrates, steel slag and coal-ash have evident influence on the effluent pH value. Smaller granular sizes of the substrates produce better SS removal efficiencies. The descending order of organic removal efficiency from high to low is grit, coal-ash, small gravel, large gravel, steel slag and blast furnace slag. The descending order of NH4^＋ -N removal efficiency from high to low is grit, coal-ash, small gravel, blast furnace slag, large gravel and steel slag. All the six substrates show favorable TP removal efficiency, and its descending order is steel slag, coal-ash, grit, blast furnace slag, small gravel and large gravel.

关 键 词：人工湿地 基质 污染物 净化效果 垂直潜流 

分 类 号：X703[环境科学与工程—环境工程]