紫外线辐射对活性污泥除磷性能的增强作用

通过菌群监测实验和理论分析,研究了适当剂量紫外线辐射对活性污泥除磷性能的增强作用.结果表明,采用适当剂量的紫外线辐射(20W紫外线杀菌灯辐射0.5min),能够使活性污泥的TP去除率提高4%～8%.受辐射后活性污泥中G⁺菌属和N⁺菌属含量增高,是其除磷性能得以增强的重要原因.紫外线不是通过辐射诱变细菌,而是通过杀死或抑制活性污泥中除磷菌属的营养物质竞争菌群-非聚磷菌群,为除磷菌属提供一个迅速生长的优化环境,增强活性污泥的除磷性能.

Enhancement of phosphorus removal property of activated sludge with UV ray irradiation

Appropriate UV ray irradiation dose for enhancement of phosphorus removal property of activated sludge with bacterial group monitoring test and theory analysis was studied. The results indicate that appropriate irradiation dose (20W UV ray germicide light radiated 0.5min) can enhance total phosphorus (TP) removal rate of activated sludge by 4%~8%. The higher content of G+ and N+ strain of bacteria in the sludge after irradiation is the main reason of enhancing their phosphorus removal property. UV ray does not lure the bacteria to change with irradiation, but kills germicides and inhibits none phosphorus accumulating bacteria (NPAB) on nutrients uptake in activated sludge to create a better environment for quick growth of phosphorus removal bacteria to enhance phosphorus removal property of activated sludge.