不同植物配置人工湿地冬季生活污水净化效果比较

以某三级串联水平潜流人工湿地污水处理工程为实验基地,研究了5种华南地区常见湿地植物的选择和配置对净化冬季生活污水的影响,为华南地区人工湿地合理优化配置植物提供一定的依据。结果表明:人工湿地系统在冬季对COD、BOD5、TP和大肠菌群仍有较好的去除效果,对TN的去除效果较差。在实验条件下,COD和BOD5的降解主要发生在第一级湿地单元,TP和TN的降解主要发生在第三级湿地单元。三级串联湿地系统净化效果较佳的植物搭配是:第一级栽种水生美人蕉,第二级栽种再力花,第三级栽种菖蒲。

A comparison of treatment of sanitary wastewater in winter by different plants in constructed wetlands

The effects of five common wetland plants in South China on treatment of sanitary wastewater in winter was studied with a horizontal subsurface flow constructed wetland composed of three stages in series.This can provide a guide for reasonable and optimum plant combination of constructed wetlands in South China.The results show that,in winter,the efficiency of removal of COD,BOD5, TP and coliform is high,while the treatment effects of TN are low.Under the experimental conditions,the removal of COD and BOD5 mainly occur in the first stage,and the removal of TP and TN mainly occur in the third stage.The optimum plant combination for a three-stage series constructed wetland is: Canna generalis in the first stage,Thalia dealbata in the second stage and Acorus calamus Linn in the third stage.