Experimental Investigation on the Microbial Inactivation of Domestic Well Drinking Water using Ozone under Different Treatment Conditions

Demir, Feridun; Atguden, Atiye

doi:10.1080/01919512.2015.1074534

Cited by 13 publications

(8 citation statements)

References 53 publications

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“…In the disinfection processes, ozone is used in gaseous or aqueous form depending on the type of decontaminated surfaces. Low concentrations of ozone and short duration of action are sufficient to eliminate microorganisms [4]. It is active against bacteria (such as Listeria spp., Escherichia spp., Salmonella spp.…”

Section: Introductionmentioning

confidence: 99%

Biocidal Effectiveness of Selected Disinfectants Solutions Based on Water and Ozonated Water against Listeria monocytogenes Strains

et al. 2019

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The aim of this study was to compare the biocidal effectiveness of disinfectants solutions prepared with ozonated and non-ozonated water against Listeria monocytogenes. Six L. monocytogenes strains were the research material (four isolates from food: meat (LMO-M), dairy products (LMO-N), vegetables (LMO-W), and fish (LMO-R); one clinical strain (LMO-K) and reference strain ATCC 19111). The evaluation of the biocidal effectiveness of disinfectant solutions (QAC—quaternary ammonium compounds; OA—oxidizing agents; ChC—chlorine compounds; IC—iodine compounds; NANO—nanoparticles) was carried out, marking the MBC values. Based on the obtained results, the effectiveness coefficient (A) were calculated. The smaller the A value, the greater the efficiency of disinfection solutions prepared on the basis of ozonated versus non-ozonated water. Ozonated water showed biocidal efficacy against L. monocytogenes. Among tested disinfectentants, independent on type of water used for preparation, the most effective against L. monocytogenes were: QAC 1 (benzyl-C12-18-alkydimethyl ammonium chlorides) (1.00 × 10−5–1.00 × 10−4 g/mL) in quaternary ammonium compounds, OA 3 (peracetic acid, hydrogen peroxide, bis (sulphate) bis (peroxymonosulfate)) (3.08 × 10−4 –3.70 × 10−3 g/mL) in oxidizing agents, ChC 1 (chlorine dioxide) (5.00 × 10−8 –7.00 × 10−7 g/mL) in chlorine compounds, IC 1 (iodine) (1.05–2.15 g/mL) in iodine compounds, and NANO 1 (nanocopper) (1.08 × 10−4 – 1.47 × 10−4 g/mL) in nanoparticles. The values of the activity coefficient for QAC ranged from 0.10 to 0.40, for OA—0.15–0.84, for ChC—0.25–0.83, for IC—0.45–0.60, and for NANO—0.70–0.84. The preparation of disinfectants solution on the basis of ozonated water, improved the microbicidal efficiency of the tested disinfectant, especially the quaternary ammonium compounds. An innovative element of our work is the use of ozonated water for the preparation of working solutions of the disinfection agents. Use ozonated water can help to reduce the use of disinfectant concentrations and limit the increasing of microbial resistance to disinfectants. This paper provides many new information to optimize hygiene plans in food processing plants and limit the spread of microorganisms such as L. monocytogenes.

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Section: Introductionmentioning

confidence: 99%

Biocidal Effectiveness of Selected Disinfectants Solutions Based on Water and Ozonated Water against Listeria monocytogenes Strains

et al. 2019

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“…The study has shown the efficacy of ozone in the disinfection of wastewater containing different microbial concentrations. Ozone disinfection is effective even at high bacterial concentrations which are higher than those employed in recent studies [16] or present in typical secondary municipal wastewater. In terms of application, considering that disinfection is the final unit process in wastewater treatment, ozone can be retrofitted without interfering with the plant or treatment process.…”

Section: Evaluation Of Bacterial Re-growthmentioning

confidence: 66%

“…Moreover, these results show that re-growth of the microorganisms cannot be prevented during ozonation because of the difficulty in maintaining residual ozone. This is attributed to the fact that ozone is a highly unstable molecule with a very short half-life in water (shorter than in air) and relatively low solubility in water [16]. Therefore, it has been recommended that ozone be used as a primary disinfectant and a secondary disinfectant such as chlorine must then be used to maintain a residual protection [16].…”

Section: Evaluation Of Bacterial Re-growthmentioning

confidence: 99%

“…This is attributed to the fact that ozone is a highly unstable molecule with a very short half-life in water (shorter than in air) and relatively low solubility in water [16]. Therefore, it has been recommended that ozone be used as a primary disinfectant and a secondary disinfectant such as chlorine must then be used to maintain a residual protection [16]. This will substantially reduce the amount of chlorine required and therefore minimise the formation of chlorination disinfection by-products.…”

Section: Evaluation Of Bacterial Re-growthmentioning

confidence: 99%

“…Previous studies on ozone disinfection efficacy have been done using pure cultures in synthetic water [15], surface water [11], well water [16]. There is a need to investigate ozone disinfection of municipal wastewater intended for reuse.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling inactivation kinetics of waterborne pathogens in municipal wastewater using ozone

Mecha

Ochieng

Momba

2019

Environmental Engineering Research

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Microbial water pollution is a key concern leading to waterborne diseases. This study evaluated the disinfection of wastewater using ozonation. The following aspects were investigated: inactivation efficiency against Escherichia coli, Salmonella species, Shigella species, and Vibrio cholerae; modelling of inactivation kinetics using disinfection models; and evaluation of microbial regrowth studies. 99% bacterial inactivation was obtained within 15 min, irrespective of the water matrix, showing the strong oxidizing potential of ozone. The disinfection data were fitted into the log-linear and Weibull models. The survival curves were non-linear and fitted the Weibull model (fractional bias and normalized mean square error equal to 0.0), especially at high bacterial concentrations (106 CFU/mL). The inactivation occurred in two stages: an initial rapid stage (15 min) and a final slow stage exhibiting a tailing mechanism (15-45 min) probably as a result of the self-defence mechanisms adopted by the bacteria to limit oxidative stress. Considering the pattern of survival curves, no significant differences (p > 0.05) were observed among the four tested bacterial species; thus showing that ozone was effective against all the bacteria tested. There was minimal bacterial regrowth in the treated samples 24 h after ozone disinfection with reactivation values of 0-5% obtained.

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Photocatalytic ozonation of wastewater: a review

2020

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Experimental Investigation on the Microbial Inactivation of Domestic Well Drinking Water using Ozone under Different Treatment Conditions

Cited by 13 publications

References 53 publications

Biocidal Effectiveness of Selected Disinfectants Solutions Based on Water and Ozonated Water against Listeria monocytogenes Strains

Biocidal Effectiveness of Selected Disinfectants Solutions Based on Water and Ozonated Water against Listeria monocytogenes Strains

Modelling inactivation kinetics of waterborne pathogens in municipal wastewater using ozone

Photocatalytic ozonation of wastewater: a review

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