某地表水厂淡水壳菜的综合防治技术研究

Integrated Control Technique of Limnoperna Fortunei in a Surface Water Treatment Plant

针对黄河流域某地表水厂因淡水壳菜大量暴发所导致的折板反应池严重堵塞、沉淀池无法正常运行、出水有明显腥臭味的情况,通过向原水中投放鱼类进行生物控制、投加二氧化氯进行化学灭活、在净水构筑物前设置机械格栅进行物理截留等三级防控措施,使淡水壳菜数量大幅度降低,同时还降低了原水中的藻类数量和嗅味,确保了原水输送管道及厂区净水构筑物的正常运行,保障了供水安全。

The outbreak of Limnoperna fortunei caused a series of problems in a surface water treatment plant in the Yellow River basin, including the serious clogging of folded plate reaction tank, abnormal operation of sedimentation tank and obvious odor of the effluent. Therefore, three-stage control measures were taken, including biological control by throwing fish into the raw water, chemical inactivation by adding chlorine dioxide and physical interception by installing mechanical grid in front of water purification structures. The results showed that there was a significant decline in the number of Limnoperna fortunei and reduction in the number of algae and odor of the raw water, thus ensuring the normal operation of the raw water transmission pipeline and the water purification structures and guaranteeing the safety of water supply.