冶金尾矿用于垂直流模拟柱处理生活污水的研究

Purification of Domestic Sewage by Vertical-flow Simulation Column Using Metallurgical Tailings

选取1#钢渣与铁尾矿组合、2#粉煤灰与铁尾矿组合2种填充方式填充成基质柱,进行垂直流人工湿地模拟柱净化污水实验,测定其对生活污水中TP、TN及COD的去除效率。实验结果显示,2个模拟柱对TP的去除效果都比较明显,最高去除率均能达到90%以上。2个模拟柱除氮效果均不太理想。1#柱对COD的去除效果良好且最稳定,2#柱处理效果略差。水力停留时间为5 d时,2个模拟柱对污染物的去除效果基本达到稳定。3周内,随着实验周期的延长,模拟柱系统逐渐稳定。

Combinations of Fe mine tailing with steal scoria（ 1#~ ） and fly ash（2# ） are used as substrate in vertical- flow constructed wetlands simulation cohmlns to treat TP, TN and COD of domestic wastewater. The results show that the removal efficiency of these two columns on TP is obvious and the maximum removal rate of both can reach above 90%. The removal efficiency of these two simulated column on TN is not ideal. Column I # is better and most stable for COD treatment, column 2# is slightly worse to treat COD. In hydraulic retention time of 5 days, the removal effects of all three columns could nearly reach stable. Besides, two column systems are grad^y stable along with the increase of experimental cycle.