低温下几种沉水植物对生活污水深度处理效果的研究

在实验室人工模拟北京地区初春较寒冷的气象条件下(10℃),研究了6种沉水植物(黑藻、马来眼子菜、北京水毛茛、轮藻、狐尾藻和小茨藻)对低浓度生活污水的净化效果。结果表明:6种沉水植物能够明显提高水体溶氧量和pH值,对水中氮磷的去除效果良好;轮藻对水中磷的净化效果突出;6种沉水植物对水中化学需氧量COD的净化效果不明显。总体上看,狐尾藻、轮藻和小茨藻改良效果最好,可以用于北方地区低温条件下生活污水的深度处理。

Research on the Deep Treatment Effect of Several Submerged Plants on Domestic Sewage under Law Temperature

The colder meteorological condition(10 ℃) in Beijing area in early spring was simulated artificially in laboratory,the purifying effects under which of 6 submerged plants(Hydrilla verticillata(L.F.)Rich.,Potamogeton malaianus Miq.,Batrachium pekinense L.,Chara sp.,Myriophyllum spicatum L.and Najas minor All.) on domestic sewage with low concn.were researched.The results showed that the 6 submerged plants could significantly enhance the dissolved oxygen content and pH value in water and had good removal effect on nitrogen and phosphorous in water.The purifying effect of Chara sp.on phosphorous in water was outstand.their The purifying effects of6 submerged plants on the chemical oxygen demand(COD) in water were not significant.Generally,the improvement effects of M.spicatum,Chara sp.and N.minor were best and they could be used in the deep treatment of domestic sewage in northern area under low temperature.