污水紫外线消毒工艺的影响因素研究

Studies on effecting factors of UV disinfection of wastewater

以大肠杆菌为受试菌种，研究了紫外线光强、配水水质及微生物因素对紫外线消毒的影响．在所选取的紫外光强范围内（0．044-0．163mW／cm^2），光强对紫外线灭活大肠杆菌的去除率影响不大．水质（浊度、铁和腐殖酸等）对水样的吸光度及紫外线穿透率都有明显的影响；但是对大肠杆菌的灭活率影响不显著；当紫外线剂量增加时，这种影响逐渐变小到可以忽略．微生物的初始浓度对紫外线对微生物的灭活率有影响，微生物初始浓度越大，灭活率越高；对于不同初始浓度，紫外线灭活后存活的微生物数量比较接近．

The effects of UV intensity, water quality and initial microorganism concentration factors on UV disinfection were studied using E.coli as testing bacterial kind. In the range of UV intensities （0.044-4）. 163mW/cm^2）, the effect of UV intensity on the removal rate of E.coli was not great. Water qualities （turbidity, ferric and humic acid concentration etc. ） all had effecting on light absorbance degree and UV transmittance of water sample, but no marked effecting on inactivation rate of E.coli; while UV doses increased, this effecting decreased gradually to negligible extent. The initial concentration of microorganism had effecting on inactivation of microorganism by UV. The higher the initial concentration of microorganism, the higher the inactivation rate. On different initial concentration, the living microorganism amounts after UV inactivation were more near relatively.