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首页> 外文期刊>Desalination and water treatment >Wastewater disinfection using sodium dichloroisocyanate (NaDCC) and sodium hypochlorite (NaOCL): Modeling, optimization and comparative analysis
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Wastewater disinfection using sodium dichloroisocyanate (NaDCC) and sodium hypochlorite (NaOCL): Modeling, optimization and comparative analysis

机译：使用二氯异氰酸钠（NaDCC）和次氯酸钠（NaOCL）进行废水消毒：建模，优化和比较分析

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The aim of this study was to evaluate the ability of sodium dichloroisocyanate (NaDCC) and sodium hypochlorite (NaOCL) for wastewater disinfection in a batch system with considering the contact time (5, 10, 15 min) and disinfectant concentration (0.01, 0.02, 0.04, 0.06, 0.08, 0.1, 0.2, 0.4 mg/L). Distilled water was mixed with wastewater to produce a given concentration of bacteria. Pure plate count (PPC) method was used to determine the initial and final concentration of bacteria. Three regression models including first order (FO), first order plus two way interaction (FO + TWI), and second order (SO) were used to fit the experimental data. The differences among group means were analyzed using Kruskal-Wallis and ANOVA analysis. The removal efficiency of NaDCC and NaOCl were 88.7 and 52.38% at an initial concentration of 0.01 mg/L and contact time of 10 min. The results of Kruskal-Wallis test showed that the mean of disinfection efficiencies were statistically different at different concentration of disinfectant (p-value < 0.05). However, there was no statistically significant difference between removal efficiency at different contact time based on one way ANOVA analysis (p-value > 0.05). These results were the same for both disinfectants. The modeling data showed that the best regression model to describe the disinfection mechanism was SO model with R-2 value of about 0.84 for both NaDCC and NaOCl. According to the present study, it can be concluded that the NaDCC is more suitable for water and wastewater disinfection because of higher efficiency at lower contact time and concentration.
机译：这项研究的目的是评估二氯异氰酸钠（NaDCC）和次氯酸钠（NaOCL）在间歇系统中进行废水消毒的能力，并考虑了接触时间（5、10、15分钟）和消毒剂浓度（0.01、0.02， 0.04、0.06、0.08、0.1、0.2、0.4毫克/升）。将蒸馏水与废水混合以产生给定浓度的细菌。使用纯板计数（PPC）方法确定细菌的初始浓度和最终浓度。使用了包括一阶（FO），一阶加双向交互（FO + TWI）和二阶（SO）的三个回归模型来拟合实验数据。使用Kruskal-Wallis和ANOVA分析来分析组均值之间的差异。在初始浓度为0.01 mg / L且接触时间为10分钟时，NaDCC和NaOCl的去除效率分别为88.7和52.38％。 Kruskal-Wallis试验的结果表明，在不同浓度的消毒剂下，消毒效率的平均值存在统计学差异（p值<0.05）。但是，基于单向方差分析（p值> 0.05），在不同接触时间下的去除效率之间在统计学上没有显着差异。两种消毒剂的结果相同。建模数据表明，描述消毒机理的最佳回归模型是NaDCC和NaOCl的R-2值均约为0.84的SO模型。根据目前的研究，可以得出结论，NaDCC由于在较低的接触时间和浓度下具有较高的效率，因此更适合于水和废水的消毒。

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