水源水中藻类及藻毒素控制试验研究

Study on control of alga and microcystins in source water

研究了氯、高锰酸钾、臭氧等单独预氧化及与混凝沉淀联合作用时,水源水中藻类及藻毒素含量的变化规律,发现预氧化对藻类的去除作用有限,混凝沉淀对藻毒素的去除作用也有限,而两者的联合作用可提高对藻类和藻毒素的去除效果;在合适的投加量下,藻类去除率在80%以上,藻毒素的去除率近90%,可有效减轻后续处理工艺的负荷,保障饮用水的安全。

The transformation rule of alga and microcystins（MCs）in source was studied at time of water treatment by three pre-oxidants： Chlorine, potassium permanganate and ozone, while the removal efficiencies were reviewed by the combined action of the coagulating sedimentation and preoxidation. The results show that only limited effects were observed for algae removing in preoxidation and for microcystins removing in the coagulating sedimentation, but the combined action of them can increase the removing rate of both algae and microcystins. Alga can be removed by more than 80 percent and MCs can be removed near 90 percent when the dose of oxidants and coagulant was appropriate. It can effectually lighten the burthen of post treatment process and ensure the safety of drinking water.