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以南京市某长江水源的N水厂滤后水为对象,通过自制纳米TiO2薄膜光催化反应器进行光催化处理试验.结果表明:在14mJ/cm2的UV剂量下,出水细菌数满足饮用水标准要求,其消毒效率与光催化过程中产生的.OH呈正相关关系;在大于198mJ/cm2的UV剂量下可导致饮用水的中正磷酸盐含量增加,大于396mJ/cm2的UV剂量可导致生物可降解有机碳(BDOC)和细菌生长潜力(BGP)明显提高,UV剂量从0mJ/cm2增加到11880mJ/cm2,PO43-P,BDOC和BGP质量浓度分别增加了47.09%,265.00%和49.16%;但是在饮用水消毒所需的低UV剂量下没有发现正磷酸盐和BGP的明显增加,表明UV/TiO2光催化消毒工艺能够有效杀灭水中的细菌且不会增加水的生物不稳定性.
The results showed that the number of effluent bacteria meets the standard of drinking water at UV dose of 14mJ / cm2, with the filtered water of N water plant of a Yangtze River source in Nanjing as the object. Requires that its disinfection efficiency is positively correlated with .OH produced during the photocatalytic process; at a UV dose greater than 198 mJ / cm2, the orthophosphate content of drinking water is increased, and UV doses greater than 396 mJ / cm2 can result in biodegradable The content of PO43-P, BDOC and BGP increased by 47.09%, 265.00% and 49.16%, respectively. However, the content of organic carbon (BDOC) and bacterial growth potential (BGP) increased significantly from 0mJ / cm2 to 11880mJ / cm2. No significant increase in orthophosphate and BGP was found at the low UV dose required for potable water disinfection, indicating that the UV / TiO2 photocatalytic disinfection process effectively killed bacteria in water without increasing the water’s biological instability.