水绵处理富营养化景观水体的试验研究

Experimental Study on the Treatment of Eutrophication of Scenic Waters with Spirogyra

提出了以水绵(spirogyra)处理富营养化景观水体,强化去除水中氮、磷等污染物的方法,以实际富营养化景观水体为对象,分析了水绵的除污染性能,在自然条件下,当水绵剂量(干重)为80mg/L时,经过20天处理,水的pH值上升至9.4,TP质量浓度降至0.48mg/L,去除效率达77.1%以上,TN质量浓度降至4.64mg/L,去除效率达85.4%,处理效率随水绵剂量的提高而增加。在利用水绵处理富营养水体的过程中,选择适当的水绵用量和处理时间,处理后的水体氮、磷含量可达到湖泊类景观环境用水的水质标准,同时降低了水体浊度,使水体中浮游藻类总生物量处于较低水平,改善了富营养化水体水质,有效减轻了水体富营养化的危害,可为处理富营养水体提供新的技术途径。

This paper puts forward a new method for the treating the eutrophic scenic waters with spirogyra and strengthening the removal of nitrogen,phosphorus and other pollutants,and taking actual eutrophic scenic water as the research object,analyzes the depollution performances of spirogyra that under natural conditions,when spirogyra＇s dosage （dry）is 80 mg/L,pH value of water increases to 9.4 through 20 days＇treatment,TP concentration and TN concentration decreases to less than 0.48 mg/L and 4.64 mg/L respectively with removal efficiencies of more than 77.1% and 85.4%,and the removal efficiencies raise with the increase of the spirogyra biomass,and during the treatment of eutrophic water,under suitable spirogyra＇s dosage and hydraulic retention time,the treated eutrophic water can reach the scenic water quality standards on nitrogen and phosphorus concentrations and reduce the water turbidity,making the total biomass of the planktonic algae be in lower level,improving the quality of eutrophic water,and mitigating the damages caused by the eutrophication of waters,and providing a new technological approach for the treatment of eutrophic scenic water.