潜流人工湿地填料除磷性能模拟研究  

Simulation Study on Phosphorus Removal Performance of Constructed Wetland Substrates

作　　者：张强[1,2] 唐娜[1,2] 梁帮强[1,2] 黄玉明[1,2] 

机构地区：[1]西南大学化学化工学院,重庆400715 [2]三峡库区生态环境教育部重点实验室,重庆400715

出　　处：《西南师范大学学报（自然科学版）》2009年第3期67-70,共4页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：863计划资助项目(2008AA06Z312);重庆市科技攻关资助项目(CSTC;2009AB7028)

摘　　要：选取煤渣、红砖屑和碎石为介质,采用静态方法模拟潜流人工湿地除磷试验,选取其中效果较好的填料与其余两种填料进行静态及动态组合除磷试验.结果表明,煤渣对生活污水中磷的静态吸附效果最佳,吸附量可达2.25mg/kg,其后依次是煤渣与红砖屑混合填料、红砖屑、煤渣与碎石混合填料和碎石.动态模拟试验中,当水力停留时间(HRT)为24h时,三级串联的煤渣潜流湿地对生活污水中总磷的吸附量达2.08mg/kg,对生活污水中总磷的平均去除率达93.40%.由于煤渣对磷较强的化学吸附及物理吸附作用,可单独作为潜流人工湿地的填料.A static simulation test of phosphorus removal by subsurface flow constructed wetland was conducted using coal cinder, crushed stone and red brick detritus, and then mixed the best performing one with other two substrates respectively and repeated static simulation test. Finally, the best performing one of all the methods was used to conduct a dynamic simulation test of phosphorus removal by subsurface flow constructed wetland. The results showed that coal cinder had the best static adsorption efficiency for phosphorus, and adsorption capacity was 2.25 mg/kg, followed by coal cinder-red brick detritus mixture, red brick detritus, coal cinder-crushed stone mixture and crushed stone. The dynamic simulation test of phosphorus removal by constructed wetland showed that the average removal rate of TP from domestic wastewater by three step series coal cinder constructed wetlands was 93.40% under hydraulic retention time of 24 h, and the saturated adsorption capacity of coal cinder was 2.08 mg/kg. The coal cinder with high physicochemical adsorption capacity for phosphorus could be used as substrate in subsurface flow constructed wetland.

关 键 词：潜流湿地 填料 吸附 磷 

分 类 号：X703[环境科学与工程—环境工程]