低温下生态浮床净化重污染河水的研究  

Purification of Heavily Polluted River Water by Ecological Floating Bed at Low Temperatures

作　　者：郑剑锋[1] 罗固源[1] 许晓毅[1] 曹佳[2] 舒为群[2] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]第三军医大学军事预防医学院,重庆400038

出　　处：《中国给水排水》2008年第21期17-20,共4页China Water & Wastewater

基　　金：重庆市科技攻关计划项目(CSTC2006AB7020、CSTC2006AA7003)

摘　　要：为了提高普通植物浮床在低温条件下对重污染水体的净化效果,引入陶粒作为浮床基质,在重庆地区的临江河构筑了植物—陶粒生态浮床,研究了美人蕉、风车草浮床在低温条件下对重污染河水中TN、TP和COD的去除效果。结果表明,美人蕉、风车草浮床对TN的平均去除率分别为36.2%、35.3%,对TP的平均去除率分别为30.1%、30.8%,对COD的平均去除率分别为27.8%、31.7%;其中,美人蕉、风车草的吸收作用可去除水体中7.2%、5.4%的TN,8.3%、6.8%的TP,陶粒的净化作用可去除水体中10.1%的TN、13%的TP和13.9%的COD。水温>10℃时,美人蕉浮床的净化能力明显高于风车草浮床,而风车草浮床在10℃以下的净化效果较好。To increase the treatment effect of the conventional plant floating bed system on heavily polluted water at low water temperatures, ceramsite was introduced as substrate of the floating bed. The ecological floating bed system was constructed at bank side of the Linjiang River in Chongqing. The removal effect of Canna indica and Cyperus ahernifolius floating beds on TN, TP and COD at low water temperatures was studied. The experimental results indicate that the removal rates of TN by Canna indica and Cyperus alternifolius floating beds are 36.2% and 35.3% , the removal rates of TP are 30.1% and 30.8% , and the removal rates of COD are 27.8% and 31.7% respectively. Canna indica and Cyperus ahernifolius can uptake 7.2% and 5.4% in TN, 8.3% and 6.8% in TP. The removal rates of TN, TP and COD by ceramsite are 10.1% , 13% and 13.9% respectively. When water temperature is higher than 10 ℃, the purification effect of the Canna indica floating bed is higher than that of the Cyperus alternifolius floating bed, and the purification effect of the Cyperus alternifolius floating bed is better when temperature is below 10℃.

关 键 词：生态浮床 低温 重污染河水 

分 类 号：X522[环境科学与工程—环境工程]