虎耳草和麦冬对生活污水的净化效果研究

分别用虎耳草和麦冬2种陆生植物进行构建小型污水净化系统,与无植物对照组进行对比,研究其在冬季气温条件下,对生活污水的净化效果.实验结果表明,经过27 d的试验,虎耳草和麦冬长势良好,生活污水水质得到明显改善.虎耳草组和麦冬组对试验水体COD的去除率为86.00%和81.91%,TN的去除率为87.38%和82.99%,TP的去除率为88.22%和87.43%,分别较无植物对照组去除率高出3~7、11~15和11~12个百分点.总体来看,虎耳草和麦冬均适用于冬季条件下生活污水的净化,虎耳草净化效果优于麦冬.

Study on Purification Effect of Saxifrage and Radix Ophiopogonis on Domestic Sewage

Two kinds of terrestrial plants, Saxifraga and Ophiopogonjaponicus, was used to construct different small-scale sewage purification system, compared with the non-plant control group to study the purification effect of domestic sewage under winter temperature. The experimental results show that after 27 days of experiment, plants have grown well and the quality of do-mestic sewage has been improved obviously. The removal rates of COD were 86. 00% and 81. 91%, TN were 87. 38% and 82. 99%, TP were 88. 22% and 87. 43%, respectively,which compared with the blank test removal rate of 3~7, 11~15 and 11~12 percentage points higher. In general, both of the above plants can be used for the purification of domestic sewage under win-ter conditions, and the former is better than the latter.