模拟钢渣垂直潜流人工湿地的除磷性能分析  

Analysis on Removal Efficiency of Phosphorus by Using Steel Slag as Substrate Materials of Vertical-flow Constructed Wetland Systems

作　　者：叶建锋[1] 徐祖信[1] 李怀正[2] 尹海龙[1] 

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

出　　处：《中国给水排水》2006年第9期62-64,68,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：为确定钢渣作为垂直潜流人工湿地基质的可行性,开展了静态吸附和钢渣人工湿地去除生活污水中磷的试验研究。结果表明钢渣对污水中磷的吸附平衡时间较长,吸附速率较快;当温度降低时,钢渣的磷吸附容量对吸附平衡浓度的依赖性也随之降低,最大理论吸附量减少了81.79%,而其吸附强度却有所增加;当处理生活污水时,在0.5 m3/(m2.d)的负荷下对TP的平均去除率达91.90%,吸附方式包括物理吸附和化学吸附;磷的最大解吸量占最大吸附量的0.75%,因而在人工湿地的应用中应注意磷解吸形成的二次污染。In order to analyze the removal efficiency of phosphorus from wastewater by using steel slag as the substrate materials of the vertical-flow constructed wetland systems, the phosphorus adsorption time, velocity, capacities and mode were examined. The adsorption experiments under static state show that steel slag has long phosphorus adsorption time and quick phosphorus adsorption velocity. Following the decrease of temperature, the maximal theoretical adsorption capacities and the relative degree of the phosphorus adsorption balance concentration and its adsorption capacities also decrease. However, the phosphorus adsorption intensity is increased. On the condition of 0.5 m^3/（ m^2· d） , steel slag can remove 91.90 percent of TP from actual domestic wastewater. The adsorption method includes physical adsorptions and chemical adsorptions. In addition, the ratio of desorption to adsorption of phosphorus in steel slag is 0.75 percent. It is necessary to control the risk of pollution from the phosphorus desorption from steel slag as the substrate materials of vertical-flow constructed wetland systems.

关 键 词：人工湿地 钢渣 垂直潜流 磷 

分 类 号：X799.3[环境科学与工程—环境工程]