The synergistic effect of Escherichia coli inactivation by sequential disinfection with low level chlorine dioxide followed by free chlorine

Yang, Wu; Yang, Dong; Zhu, Suiyi; Chen, Bo-Yan; Huo, Mingxin; Lǐ, Jùnwén

doi:10.2166/wh.2012.067

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…However, chlorine dioxide has the strongest inactivation effect at pH 8.7, which is consistent with the trends of chlorine dioxide inactivation of Pseudomonas aeruginosa and Staphylococcus aureus in water [17]. In other scenarios, the higher k value of Escherichia coli inactivation by sequential disinfection with a low level chlorine dioxide followed by free chlorine was obtained at lower pH [18].…”

Section: Effect Of Ph and Temperature On N Europaea Disinfection Kineticssupporting

confidence: 83%

Disinfection Kinetics of Free Chlorine, Monochloramines and Chlorine Dioxide on Ammonia-Oxidizing Bacterium Inactivation in Drinking Water

Zhang¹,

Qiu²,

Xu³

et al. 2021

Water

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With the widespread use of chloramines disinfection, nitrification has become a problem that cannot be ignored. In order to control nitrification in the drinking water distribution system (DWDS), the inactivation effect of free chlorine, monochloramine and chlorine dioxide on ammonia-oxidizing bacterium (AOB) was studied under different temperature (8 °C, 26 °C and 35 °C) and pH (6.0, 7.0 and 8.7) conditions. The inactivation effect of Nitrosomonas europaea (a kind of AOB) by the three disinfectants increases with increasing temperature. As for the raised pH, the inactivation effect of free chlorine and monochloramine on AOB decreased, while that of chlorine dioxide increased. Last, but certainly not least, the experimental data of the disinfection were calculated to develop the N. europaea inactivation kinetic model, which was based on the first order Chick–Watson equation. The proposed model in this study took the two variables, pH and temperature, into consideration simultaneously, which were used to evaluate the average Ct value (multiplying the concentration of the residual disinfectant by the time of contact with N. europaea) required for different disinfectants when they produced the ideal inactivation effect on N. europaea.

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Section: Effect Of Ph and Temperature On N Europaea Disinfection Kineticssupporting

confidence: 83%

Disinfection Kinetics of Free Chlorine, Monochloramines and Chlorine Dioxide on Ammonia-Oxidizing Bacterium Inactivation in Drinking Water

Zhang¹,

Qiu²,

Xu³

et al. 2021

Water

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“…In this context, many authors have reported the formation of chlorate and perchlorate by CDA electrolyses in aqueous solutions containing chlorides [38][39][40]. ClO -+ H2O2 → Cl -+ 3 /2O2 + 2H + + 2e - [10] 2H + + 2ClO3 -+ H2O2 → 2ClO2 + 2H2O + O2 [11] This latter reaction leads to the formation of chlorine dioxide, an excellent disinfectant with no tendency to form disinfection by-products, and may take place preferentially near the anode surface due to the local acidic pH formed by the water oxidation reaction [Eq.…”

Section: Resultsmentioning

confidence: 99%

“…For this reason, many water disinfection technologies have been developed within the last years [6][7][8]. In this sense, several authors have reported the elimination of microorganisms, mainly E. coli, by the addition of chemical reagents such as ozone, hydrogen peroxide or chlorine derivate products [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Use of carbon felt cathodes for the electrochemical reclamation of urban treated wastewaters

Cotillas

Llanos

Rodrigo

et al. 2015

Applied Catalysis B: Environmental

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This work focuses on the application of electrolysis with carbon felt cathodes for the reclamation of actual effluents from municipal wastewater treatment facilities (WWTFs) in combination with different anode materials (dimensionally stable anodes-DSA, conductive diamond anodes-CDA and iron-Fe). First of all, the efficiency of electrodisinfection with CDA and DSA was assessed, finding that total elimination of Escherichia coli (E. coli) can be attained at applied electric charges below 0.03 Ah dm-3 , and that the disinfection process is more efficient when using CDA. Furthermore, it was observed that the formation of hydrogen peroxide on carbon felt cathodes limits the concurrence of disinfection by-products (chlorates, perchlorates and organic chlorinated by-products), an interesting result that broadens the potential of CDA for the regeneration of urban wastewater. Results with Fe anodes show that it is possible to attain the complete removal of microorganisms with comparable efficiency to that of CDA (due to the contribution of Fenton's reaction) and that it was possible to totally remove the turbidity of the effluent when working at current densities from 12.50 A m-2. Finally, it was found that Fe is the most efficient anode material (lowest power consumption) at low current densities and CDA is the most appropriate one at current densities higher than 5 A m-2. According to these results, the pairs anode-cathode CDA-carbon felt and Fe-carbon felt behave as the most promising electrode materials to be applied in wastewater reclamation processes.

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“…The mode of action of C102 on E. coli was assessed, and the observations of the efflux of potassium strongly implicate the loss of permeability control as the primary lethal event at the physiological level, with nonspecific oxidative damage to the outer membrane leading to the destruction of the transmembrane ionic gradient (4). The o-nitrophenyl-(3-Dgalactoside assay suggested that the permeability of cell wall rather than the viability of E. coli were changed under 0.02 mg/liter C102 treatment and the coexistence of residual C102 and free chlorine also plays an active synergistic effect (41). Both the 500-and 1,000-ppm levels of C102 gas for the 24-h treatment were successful in rendering all the conidia of hyphomycete organisms Cladosporium cladosporioides, Penicillium chrysogenum, and Stachybotrys chartarum completely nonculturable (39).…”

Section: Resultsmentioning

confidence: 99%

Antimicrobial Activity of Controlled-Release Chlorine Dioxide Gas on Fresh Blueberries

Sun

Bai

Ference

et al. 2014

Journal of Food Protection

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The effect of chlorine dioxide (ClO2) gas on the safety and quality of blueberries was studied. In vitro studies revealed that both ClO2 gas fumigation and ClO2 direct contact in water killed food pathogen bacterium Escherichia coli and fruit decay pathogen fungus Colletotrichum acutatum. In vivo studies were conducted using noninoculated berries and berries inoculated with postharvest decay and foodborne pathogens. Berries were inoculated with either E. coli (5.2 log CFU/g) or C. acutatum (3.9 log CFU/g). Inoculated fruit were dried for 2 h at room temperature in a climate-controlled laboratory and packed in perforated commercial clamshells, with or without ClO2 pads, and stored at 10°C for up to 9 days. The effects of ClO2 on microbial populations and fruit firmness were monitored during storage. In the inoculation experiment, treatment with ClO2 reduced populations of E. coli and C. acutatum by 2.2 to 3.3 and 1.3 to 2.0 log CFU/g, respectively. For the noninoculated blueberries, the initial total aerobic bacteria count and the yeast and mold count were 4.2 and 4.1 log CFU/g, respectively. ClO2 treatment reduced total aerobic bacteria count and yeast and mold count by 1.5 to 1.8 and 1.3 to 1.7 log CFU/g, respectively. The firmness of both inoculated and noninoculated blueberries was maintained by ClO2 treatment. Thus, controlled-release ClO2 gas fumigation technology shows promise as an effective and practical antimicrobial agent in commercial clamshell packaging of blueberry and other fruits.

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The synergistic effect of Escherichia coli inactivation by sequential disinfection with low level chlorine dioxide followed by free chlorine

Cited by 8 publications

References 20 publications

Disinfection Kinetics of Free Chlorine, Monochloramines and Chlorine Dioxide on Ammonia-Oxidizing Bacterium Inactivation in Drinking Water

Disinfection Kinetics of Free Chlorine, Monochloramines and Chlorine Dioxide on Ammonia-Oxidizing Bacterium Inactivation in Drinking Water

Use of carbon felt cathodes for the electrochemical reclamation of urban treated wastewaters

Antimicrobial Activity of Controlled-Release Chlorine Dioxide Gas on Fresh Blueberries

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