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采用次氯酸钙、二氧化氯和紫外线3种消毒方法对反渗透海水淡化水进行消毒,综合p H、总溶解性固体(TDS)、余氯、大肠杆菌数等指标研究了消毒剂量和水质随贮水时间的变化。结果表明,消毒剂最佳剂量分别为次氯酸钙5mg·L~(-1),二氧化氯1 mg·L~(-1),紫外线5 m J·cm-2。经次氯酸钙消毒后淡化水的p H和TDS逐渐升高,7 d后基本稳定;而二氧化氯消毒后淡化水的p H略有降低,6 d后基本不变,TDS变化则相反。紫外线消毒后p H和TDS几乎不变,但大肠杆菌容易复活,第7天检出浓度为18 CFU·L~(-1)。
The disinfection of reverse osmosis seawater desalinated water was carried out by three kinds of disinfection methods, such as calcium hypochlorite, chlorine dioxide and ultraviolet light. The disinfection dose and water quality were studied by comprehensively analyzing the indexes of p H, total dissolved solid (TDS), residual chlorine and E.coli, With the change of water storage time. The results showed that the optimum dosages of disinfectants were 5 mg · L -1 of calcium hypochlorite, 1 mg · L -1 of chlorine dioxide and 5 mJ · cm -2 of UV light respectively. P H and TDS of desalinated water gradually increased after hypochlorous acid disinfection, and basically stabilized after 7 d. However, the p H of desalinated water slightly decreased after chlorine dioxide disinfection, but remained unchanged after 6 d, while the TDS changed in the opposite direction . After UV disinfection p H and TDS almost unchanged, but easy to revive E. coli, the first 7 days detected a concentration of 18 CFU · L -1.