预臭氧化去除水中有机物效果及其生物稳定性

以黄浦江上游水源为原水,采用运行水量各为1 m3·h-1的两套中试设备,通过在饮用水常规处理工艺前预加臭氧氧化和预加氯氧化平行对比试验,测定了CODMn、UV254、TOC三种表示有机物含量的替代参数和生物可同化有机碳AOC,研究了预臭氧化工艺对水中有机物的去除效果,并对预臭氧化水的生物稳定性进行了分析评价,发现:在原水CODMn为5.56~6.50 mg·L-1情况下,预臭氧化工艺对CODMn的去除率比预氯化工艺提高2.5%,对UV254的去除率比预氯化工艺提高6%;两工艺对TOC的去除率均不高;预臭氧化工艺出水生物稳定性差,AOC明显大于预氯化工艺.

Effect of preozonation on biological stability and organic matter removal from water

Both preozonation and prechlorination processes were adopted before the conventional drinking water treatment process, and the raw water for each was taken from upstream of Huangpu River. The comparative pilot experiments were conducted at a scale of 1.0 m3 · h ^- 1 for each. CODMn, UV254 , TOC, and AOC of the finished water were determined after the preozonation process, compared with those after the preehlorination process. The Effect of the preozonation process on organic material removal from water was studied. The biological stability of the finished water after the preozonation process was analyzed. The results show that when CODMn in raw water was 5.56 -6. 50 m3 · L^-1, CODM, removal efficiency and UV254 removal rate by pre-ozonation process increased by 2. 5% and 6% , respectively, compared with those by pre -chlorination process. TOC removal efficiencies by both processes were not high. AOC in the finished water after the preozonation process was higher obviously than that after the pre- chlorination process.