Studies on process parameters for chlorine dioxide production using IrO2 anode in an un-divided electrochemical cell

Pillai, K. Chandrasekara; Kwon, Tae Ouk; Park, Bo Bae; Moon, Ilkyeong

doi:10.1016/j.jhazmat.2008.08.090

Cited by 31 publications

(15 citation statements)

References 34 publications

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“…This is in line with the work of Pillai et al (2009) and Bergmann & Koparal (2006), who reported the presence of CIO2 in ECA water. On the other hand, Gauw et al (1999) reported that CIO2 was not present in a freshly generated ECA.…”

Section: Chlorine Dioxide and Ozonesupporting

confidence: 93%

Electrochemically activated water as an alternative to chlorine for decentralized disinfection

Ghebremichael

Muchelemba

Petrus̆evski

et al. 2011

Journal of Water Supply: Research and Technology-Aqua

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Electrochemically activated (ECA) water is being extensively studied and considered as an alternative to chlorine for disinfection. Some researchers claim that ECA is by and large a chlorine solution, while others claim the presence of reactive oxygen species such as ozone and hydroxyl radicals in addition to chlorine. This study compares sodium hypochlorite (NaOCI) and ECA in terms of disinfection efficacy, trihalomethanes (THMs) formation, stability and composition. The stu(jies were carried out under different process conditions (pH 5,7 and 9, disinfectant concentrations of 2-5 mg/L and dissolved organic carbon (DOC) concentration of 2-4 mg/L). The results indicated that in the presence of low DOC {<2 mg/L) ECA showed better disinfection efficacy for EscheriMa colt inactivation, formed lower THM and had better stability compared with NaOCI at both pH 5 and 7.Stability studies of stock solutions showed that over a period of 30 days, ECA decayed by only 5% while NaOCI decayed by 37.5% at temperatures of 4 °C. In a fresh ECA of 200 mg/L chlorine, about 5.3 mg/L ozone and 36.9 mg/L CIO2 were detected. The study demonstrates that ECA could be a suitable alternative to NaOCI where decentralized production and use are required.

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Section: Chlorine Dioxide and Ozonesupporting

confidence: 93%

Electrochemically activated water as an alternative to chlorine for decentralized disinfection

Ghebremichael

Muchelemba

Petrus̆evski

et al. 2011

Journal of Water Supply: Research and Technology-Aqua

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“… Huang et al (2016) demonstrated that chlorine generated during DC treatment was much more effective in disinfection of different kinds of pathogens than chemical chlorination. Hydrogen peroxide (H 2 O 2 ) and chlorine dioxide (ClO 2 ) are also common byproducts in electro-chemical reactions ( Qiang et al, 2002 , Bergmann and Koparal, 2005 , Pillai et al, 2009 ), and they have been proven efficient in inactivating bacterial and viral pathogens ( Huang et al, 1997 , Lazarova et al, 1999 , Labas et al, 2008 , Juven and Pierson, 1996 ). In contrast, thermal disinfection due to OH was responsible for the inactivation of bacterial pathogen indicators during sludge electro-dewatering treatment reported by Navab-Daneshmand et al (2012) .…”

Section: Discussionmentioning

confidence: 99%

Sludge disinfection using electrical thermal treatment: The role of ohmic heating

Zhu

Hoffmann

Jiang

2018

Science of The Total Environment

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Electrical heating has been proposed as a potential method for pathogen inactivation in human waste sludge, especially in decentralized wastewater treatment systems. In this study, we investigated the heat production and E. coli inactivation in wastewater sludge using electrical thermal treatment. Various concentrations of NaCl and NH4Cl were tested as electrolyte to enhance conductivity in sludge mixtures. At same voltage input (18 V), sludge treated with direct current (DC) exhibited slower ascent of temperature and lower energy efficiencies for heat production comparing to that using alternate current (AC). However, DC power showed better performance in E. coli inactivation due to electrochemical inactivation in addition to thermal inactivation. Greater than 6log10 removal of E. coli was demonstrated within 2 h using 0.15 M of NaCl as electrolyte by AC or DC power. The heat production in sludge was modeled using Maxwell–Eucken and effective medium theory based on the effective electrical conductivity in the two-phase (liquid and solid) sludge mixtures. The results showed that the water and heat loss is a critical consideration in modeling of sludge temperature using ohmic heating. The experimental data also suggested that the models are less applicable to DC power because the electrochemical reactions triggered by DC reduce the concentration of NH4+ and other ions that serve as electrolyte. The results of this study contribute to the development of engineering strategies for human waste sludge management.

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“…Due to its high oxidative capacity, the required amount of chlorine dioxide is lower and the required contact time is shorter to obtain the same antimicrobial effect as chlorine [62]. Regardless of its practical applications, it can be toxic to humans at concentrations greater than 1000 ppm [63]. Furthermore, chlorine dioxide gas has to be generated on-site, because it cannot be compressed and stored or transported under pressure [64].…”

Section: Foggingmentioning

confidence: 99%

Emerging Technologies for Aerial Decontamination of Food Storage Environments to Eliminate Microbial Cross-Contamination

Oliveira

Tiwari

Duffy

2020

Foods

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Air is recognized as an important source of microbial contamination in food production facilities and has the potential to contaminate the food product causing food safety and spoilage issues for the food industry. Potential for aerial microbial contamination of food can be a particular issue during storage in cold rooms when the food is not packaged and is exposed to contaminated air over a prolonged period. Thus, there are potential benefits for the food industry for an aerial decontamination in cold storage facilities. In this paper, aerial decontamination approaches are reviewed and challenges encountered for their applications are discussed. It is considered that current systems may not be completely effective and environmentally friendly, therefore, it is of great significance to consider the development of nonresidual and verified decontamination technologies for the food industry and, in particular, for the cold storage rooms.

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Studies on process parameters for chlorine dioxide production using IrO2 anode in an un-divided electrochemical cell

Cited by 31 publications

References 34 publications

Electrochemically activated water as an alternative to chlorine for decentralized disinfection

Electrochemically activated water as an alternative to chlorine for decentralized disinfection

Sludge disinfection using electrical thermal treatment: The role of ohmic heating

Emerging Technologies for Aerial Decontamination of Food Storage Environments to Eliminate Microbial Cross-Contamination

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