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首页> 外文期刊>Environmental engineering and management journal >EFFICACY OF CHLORINE DIOXIDE AND SODIUM HYPOCHLORITE IN REUSE WATER DISINFECTION
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EFFICACY OF CHLORINE DIOXIDE AND SODIUM HYPOCHLORITE IN REUSE WATER DISINFECTION

机译：二氧化氯和次氯酸钠在回用水消毒中的功效

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摘要

Potable water is becoming day by day more difficult and more expensive to obtain. Therefore to reduce the pressure in natural water resources, wastewater reclamation is expanding through many municipalities and industries for applications where potable water is not required. However, specific treatments must be performed before the water reuse. These treatments are necessary to reduce physical-chemical and microbiological contaminants. This work has evaluated the action of chlorine dioxide (ClO2) and sodium hypochlorite (NaOCl) in reducing the mesophilic aerobic micro-organisms population as well as diminishing the chlorine demand in the water used. The results have shown that chlorine dioxide is less affected by water contaminants when compared to sodium hypochlorite; a 3 log cycle reduction in mesophilic aerobic micro-organism population was obtained by using a ClO2 residual concentration of 0.2 mg.L-1 and a chlorine residual, from NaOCl, of 0.8 mg.L-1. To obtain these concentrations, it is necessary to dose 5.0 mg.L-1 of ClO2 and 15.5 mg.L-1 of NaOCl in water.
机译：饮用水变得越来越困难，并且获取起来越来越昂贵。因此，为了减轻自然水资源的压力，废水回填正在通过许多市政和工业扩展，用于不需要饮用水的应用。但是，在回用水之前必须进行特殊处理。这些处理对于减少物理化学和微生物污染物是必需的。这项工作评估了二氧化氯（ClO2）和次氯酸钠（NaOCl）在减少中温需氧微生物种群以及减少所用水中的氯需求方面的作用。结果表明，与次氯酸钠相比，二氧化氯受水污染物的影响较小。使用0.2 mg.L-1的ClO2残留浓度和0.8 mg.L-1的NaOCl残留氯，可以使嗜温性好氧微生物种群减少3 log循环。为了获得这些浓度，必须在水中加入5.0 mg.L-1的ClO2和15.5 mg.L-1的NaOCl。

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