风车草对生活污水的净化效果及其在人工湿地的应用

PURIFYING EFFICIENCY OF CYPERUS ALTERNIFOLIUS TO DOMESTIC SEWAGE AND ITS APPLICATION IN CONSTRUCTED WETLAND*

研究了风车草 (Cyperusalternifolius)的生长特性和对生活污水的净化效果 .风车草全年保持生长 ,即使在冬天仍能维持一定的生长速率 .风车草在生活污水中培养 10d后 ,污水中TN、TP、COD和BOD的去除率分别达到91%、92 %、70 %和 73 % ,其中风车草对N、P的吸收量分别占净化量的 5 5 %和 5 3 % .种植风车草的潜流型人工湿地对TN、TP、COD和BOD的去除率分别为 6 4%、47%、74%和 74% ,与不种植物的人工湿地相比 ,TN、TP、COD和BOD的去除率分别提高了 2 8%、19%、14 %和 13 % .图 2表 3参

Growth characteristics and purifying efficiency of Cyperus alternifolius to domestic sewage were studied. C. alternifolius could grow throughout a year and keep certain growth rate even in the winter. After C. alternifolius were cultivated in domestic sewage for 10 d, the removal rates of TN,TP,COD and BOD were 91%,92%,70% and 73%, respectively; while the amounts of uptake to TN and TP by plant accounted for 55% and 53% of the purification amounts, respectively. The removal rates of TN,TP,COD and BOD in the subsurface flow constructed wetland with C. alternifolius were 64%, 47%, 74% and 74%, respectively; compared with unplanted system, the removal rates of TN,TP,COD and BOD raised 28%,19%,14% and 13%, respectively. Fig 2, Tab 3, Ref 12