臭氧消毒对饮用水中微生物生长的影响

Impact of Ozonation on Microbial Growth in Drinking Water

向滤后水中通入不同剂量的臭氧,使其初始浓度分别为0.11mg/L、0.45mg/L、1.69mg/L,研究发现臭氧能使潜在的AOC增加95%～185%,使微生物可利用磷(MAP)增加120%～210%,降低了饮用水的生物稳定性;与AOC相比MAP的增幅更大一些,加强了AOCpotential对细菌生长的限制性作用。研究也指出同时控制有机物和磷的量是控制微生物生长的更有效途径。

Different dosages of ozone were added to the effluent of filtration to make the initial ozone concentations in the water be 0.11 mg/L,0.45 mg/L,1.69 mg/L respectively.Results show that ozone can increase potential AOC and MAP by 95%~185% and 120%~210% respectively thus reduce the biological stablity of drinking water.The limiting effect of AOCpotential is enhanced by the bigger increase of MAP.It is also found that controlling organic matter and phosphorus is a more effective method to control microbial growth at the same time.