采用化学法治理景观湖蓝藻的研究

Study on the Control of Cyanobacteria in Landscape Lake by Chemical Method

采用化学方法对富营养化比较严重的景观湖水藻类大量繁殖进行阻断,分别用高锰酸钾、高铁酸钾、三氯异氰尿素、次氯酸钠四种氧化剂和聚合氯化铝、聚合硫酸铁、聚硅酸铝铁、壳聚糖复合改性粘土四种絮凝剂进行单一试验,筛选出最佳氧化剂和絮凝剂,并用两种复合试剂进一步试验,发现5mg/L高锰酸钾+200mg/L聚硅酸铝铁的复合试剂处理效果最佳,藻类、chl-a、COD和浊度的去除率分别达到95.1%,89.1%,81.1%,和95.8%。

A chemical method is used to block the massive propagation of algae in landscape lake water with serious eutrophication.A single experiment is carried out with four oxidants,namely potassium permanganate,potassium ferrate,trichloroisocyan urea,sodium hypochlorite,and four flocculants,namely polyaluminum chloride,polymeric ferric sulfate,polysilicate aluminum iron,and chitosan composite modified clay to screen out the best oxidant and flocculant.Further experiments are carried out with two kinds of compound reagents and it is found that the compound reagent of 5mg/l potassium permanganate with 200mg/L polysilicate aluminum iron has the best treatment effect.The removal rates of algae,chl-a,COD and turbidity reach up to 95.1%,89.1%,81.1%and 95.8%respectively.