滇池水体除藻材料的除藻作用试验研究

Experimental research on algae-removing effect of Dianchi Lake by algaecide material

利用昆明地区的粘土矿制作新型轻质除藻材料 ,试验研究该材料对滇池湖水中藻类的除藻及净化作用。实验室小试 (2 0 L )结果表明 ,该除藻材料放入滇池水样实验 70 d后 ,水质明显好转 ,藻类去除率可达 95 .8% ,CODMn、TN及 TP的去除率分别为 34 .4%、81.5 %、2 8.2 %。在滇池湖边 30 0 m2 水面围栏扩大试验结果显示 ,除藻材料放入试验区水体 10 d后 ,水体中藻类含量明显减少 ,水体透光率从 5 5 %增加到 80 % ,水质状况也有很大改善。研究结果表明 ,该材料具有良好的湖泊水体除藻及净化作用 。

The present paper is aimed at introducing the author's research on how to cultivate a new-type light algaecide which helps to remove the algae and purify the polluted water in Dianchi Lake. The said light algaecide material has been made by the clay mine in Kunming area. The results of our lab test (20 litre) indicate that, after the material was added into the water tank filled with water from Dianchi lake for 70 days, the water quality can get obviously meliorated. 95.8% of algae in the tested water can be removed. The removing rate of COD_(Mn), TN and TP can reach 34.4%, 81.5% and 28.2% respectively. The results of scale-up test of segregated 300 m^2 at lakeside of Dianchi indicate that, after the material was put to the water area to be tested for 10 days, the content of algae in the water to be treated can be found to get evidently reduced. In contrast, the light transmissivity of the water increased from 55% to 80%. And in turn the water quality of the tested water area has remarkably improved. Thus, the results of the present research prove that the new-type light material algaecide has a nice function for algae-removing and pollution-purifying effect. Hence, it is promising to further the present research and extend its effect.