摘要
采用紫外线对再生水进行消毒,考察紫外辐照度和辐照时间对再生水中微生物的灭活情况,并研究了影响紫外线消毒的水质因素及其影响程度的大小。结果表明,在低曝辐量时,同一曝辐量下,采用200μW/cm2的辐照度灭菌效果最好,lg(N/N0)可达到3以上;同一曝辐量下,低辐照度照射的水中粪大肠菌群的光复活率要高于高辐照度下的复活率;水中腐殖质、Fe3+含量和浊度影响紫外消毒的效果,并且影响程度从大到小依次为腐殖酸含量、浊度、Fe3+含量。
UV disinfection was used for advanced treatment of reused water. The effect of UV irradiance and irradiation time on the inactivation condition of microorganism was studied. And the water quality which affected the ultraviolet disinfection and its degree of influence were also investigated. The results showed that at the same low UV radiant exposure, the sterilization was the best when the light intensity was 200 μW/cm^2 and lg （N/No） could reach above 3. The photoreactivation rate of fecal coliform under low light intensity was higher than that under the high light intensity. Humic substances, the eoneent of Fe^3＋ and turbidity were three main factors which affect the effect of UV disinfection, and the degree of influence was humic acid content, the turbidity and Fe^3＋ content from large to small.
出处
《水处理技术》
CAS
CSCD
北大核心
2015年第5期46-49,共4页
Technology of Water Treatment
关键词
紫外线消毒
再生水
影响因素
曝辐量
灭活率
光复活
UV disinfection
recycled water
influencing factor
radiant exposure
inactivation ratio
photoreactivation
