微波/紫外处理城市污水回用于景观水的杀菌研究

针对目前城市污水处理厂污水回用作为城市景观水,存在细菌超标的问题,提出采用微波/紫外杀菌后做为城市景观水,研究表明微波功率越大,杀菌效果越好,但功率达到450W时,再增加微波功率杀菌效果增加不明显。在微波功率一定的情况下,紫外灯根数越多,吸收的微波总能量越大,杀菌效果越好。但随着无极紫外灯根数的增加,每根灯管吸收的微波能量相对越少,就不能将其很好地激发,且会增加成本。因此,在实际应用中应根据实际情况确定紫外灯根数。

Research on Sterilization of Recycled Urban Sewage for Landscape Water with Microwave/UV Method

This study adopted microwave and ultraviolet （UV） to sterilize the landscape water from recycled urban sewage giv- en the fact that such waters often exceed the bacterial standards. The results show that the sterilization effects are better with bigger microwave power, but the performance remains flat when the microwave power reaches 450W. Under certain microwave power, the absorption of microwave energy rises with the increase of ultraviolet lamps, and resulting in better sterilization effect. But with the increase of ultraviolet lamps, the absorption of microwave energy for each lamp tube is reduced. Poor efficiency of each lamp will increase the costs. Therefore, the number of UV lamps should be determined according to the actual situation.