Pub Date : 2021-09-26DOI: 10.1080/01919512.2021.1984205
L. H. Moreira, M. K. Salomão, H. C. Carvalho, André Luis Silva Mendes, R. A. Zângaro, A. B. Fernandes, Carlos José de Lima
ABSTRACT A dynamic fluid system using ozonated water flowing over the bovine peritoneal membrane was developed. Histological analyses were performed to verify the maximum time of ozone exposure to maintain the viability of the biological material. The results indicate that the biological viability of the peritoneum tissue was impaired after 15 minutes of exposure (5.5 mg O3 (cm2)−1) to ozonated water in a dynamic condition. Thus, this biological sample can be submitted to the dynamic fluid system with ozonated water for 10 minutes at an applied ozone dose of 3.7 mg O3 (cm2)−1, without inducing significant changes to the tissue.
{"title":"Ozonation of Bovine Peritoneal Membrane for Preservation: Preliminary Investigation","authors":"L. H. Moreira, M. K. Salomão, H. C. Carvalho, André Luis Silva Mendes, R. A. Zângaro, A. B. Fernandes, Carlos José de Lima","doi":"10.1080/01919512.2021.1984205","DOIUrl":"https://doi.org/10.1080/01919512.2021.1984205","url":null,"abstract":"ABSTRACT A dynamic fluid system using ozonated water flowing over the bovine peritoneal membrane was developed. Histological analyses were performed to verify the maximum time of ozone exposure to maintain the viability of the biological material. The results indicate that the biological viability of the peritoneum tissue was impaired after 15 minutes of exposure (5.5 mg O3 (cm2)−1) to ozonated water in a dynamic condition. Thus, this biological sample can be submitted to the dynamic fluid system with ozonated water for 10 minutes at an applied ozone dose of 3.7 mg O3 (cm2)−1, without inducing significant changes to the tissue.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"129 ","pages":"587 - 592"},"PeriodicalIF":2.7,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72428616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-07DOI: 10.1080/01919512.2021.1967723
M. Ishii, Vu Phong Lam, K. Fujiwara, J. Park
ABSTRACT Japanese mustard spinach with 4–5 unfolded leaves were transplanted in a nutrient film technique hydroponic system to investigate the effects of washing roots intermittently with ozonated water (OW) on plant growth. The high concentration of OW generated electrolytically was mixed in the nutrient solution tank, showed 5.8 mg.L−1, and circulated through the culture beds for 1 h every week. After washing the roots with OW or tap water (TW) as a control for 1 h, Otsuka house A solution (NO3-N: 16.8 me.L−1, NH4-N: 1.8 me.L−1, P: 5.1 me.L−1, K: 8.6 me.L−1, Ca: 8.2 me.L−1, Mg: 3.0 me.L−1) at 1.2 dS.m–1 was provided for plant cultivation in hydroponic culture systems. The OW or TW was replaced every week. The fresh and dry weights of the leaves, number of leaves, leaf length, and leaf width of plants treated with OW were significantly higher than those of the plants treated with TW at 1, 2, and 3 weeks after transplanting (WAT). The ratio of the shoot and root dry weights at 1, 2, and 3 WAT was significantly higher in plants grown in the OW flushing treatment compared with the control treatment. However, the roots dry weights were not significantly different between the OW- and TW-treated plants. Moreover, the number of coliform bacteria and aerobic plate count (APC) in the solution and plants were not significantly different between the two treatments. These results indicate that washing roots intermittently with 5.8 mg.L−1 dissolved ozone concentration of OW for 1 h per week promotes aerial plant growth without physiological disorder and is not accompanied by a decrease in the number of coliform bacteria and APC in the solution and plants.
{"title":"Intermittent Root Flushing with Ozonated Water Promotes Growth of Japanese Mustard Spinach (Brassica rapa var. perviridis) grown in a Nutrient Film Technique Hydroponic Culture—Preliminary Results","authors":"M. Ishii, Vu Phong Lam, K. Fujiwara, J. Park","doi":"10.1080/01919512.2021.1967723","DOIUrl":"https://doi.org/10.1080/01919512.2021.1967723","url":null,"abstract":"ABSTRACT Japanese mustard spinach with 4–5 unfolded leaves were transplanted in a nutrient film technique hydroponic system to investigate the effects of washing roots intermittently with ozonated water (OW) on plant growth. The high concentration of OW generated electrolytically was mixed in the nutrient solution tank, showed 5.8 mg.L−1, and circulated through the culture beds for 1 h every week. After washing the roots with OW or tap water (TW) as a control for 1 h, Otsuka house A solution (NO3-N: 16.8 me.L−1, NH4-N: 1.8 me.L−1, P: 5.1 me.L−1, K: 8.6 me.L−1, Ca: 8.2 me.L−1, Mg: 3.0 me.L−1) at 1.2 dS.m–1 was provided for plant cultivation in hydroponic culture systems. The OW or TW was replaced every week. The fresh and dry weights of the leaves, number of leaves, leaf length, and leaf width of plants treated with OW were significantly higher than those of the plants treated with TW at 1, 2, and 3 weeks after transplanting (WAT). The ratio of the shoot and root dry weights at 1, 2, and 3 WAT was significantly higher in plants grown in the OW flushing treatment compared with the control treatment. However, the roots dry weights were not significantly different between the OW- and TW-treated plants. Moreover, the number of coliform bacteria and aerobic plate count (APC) in the solution and plants were not significantly different between the two treatments. These results indicate that washing roots intermittently with 5.8 mg.L−1 dissolved ozone concentration of OW for 1 h per week promotes aerial plant growth without physiological disorder and is not accompanied by a decrease in the number of coliform bacteria and APC in the solution and plants.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"23 1","pages":"464 - 472"},"PeriodicalIF":2.7,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85658967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-24DOI: 10.1080/01919512.2021.1967722
C. Soares, Cláudio Eduardo Cartabiano Leite, F. Dahlke, A. Maiorka, Marília Miotto, V. Scussel, J. De Dea Lindner
ABSTRACT Ozone gas (O3) is used as an oxidizing agent and can be applied as a sanitizer to control microorganisms and degrade toxic compounds, such as pesticides and mycotoxins, in food industries. Some studies investigated the use of O3 as an agent to reduce pathogenic bacteria such as Salmonella enteritidis. The action of O3 on the eggshell cuticle and structures of filamentous fungi is still not yet well studied. In this work, scanning electron microscopy (SEM) was used to assess the hens’ eggshell structure after the exposition to O3, mainly to obtain information about the potential antifungal action. The SEM micrographs obtained shown that the application of O3 during 120 min damaged fungi hyphae adhered to the eggshell cuticle without severely compromising the external structure of the eggshell. Further studies are necessary to establish an ideal O3 treatment for the fungal decontamination of chicken eggs.
{"title":"Antifungal Action of Ozone on Chicken Eggshell Cuticles: A Preliminary Study","authors":"C. Soares, Cláudio Eduardo Cartabiano Leite, F. Dahlke, A. Maiorka, Marília Miotto, V. Scussel, J. De Dea Lindner","doi":"10.1080/01919512.2021.1967722","DOIUrl":"https://doi.org/10.1080/01919512.2021.1967722","url":null,"abstract":"ABSTRACT Ozone gas (O3) is used as an oxidizing agent and can be applied as a sanitizer to control microorganisms and degrade toxic compounds, such as pesticides and mycotoxins, in food industries. Some studies investigated the use of O3 as an agent to reduce pathogenic bacteria such as Salmonella enteritidis. The action of O3 on the eggshell cuticle and structures of filamentous fungi is still not yet well studied. In this work, scanning electron microscopy (SEM) was used to assess the hens’ eggshell structure after the exposition to O3, mainly to obtain information about the potential antifungal action. The SEM micrographs obtained shown that the application of O3 during 120 min damaged fungi hyphae adhered to the eggshell cuticle without severely compromising the external structure of the eggshell. Further studies are necessary to establish an ideal O3 treatment for the fungal decontamination of chicken eggs.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"33 1","pages":"407 - 412"},"PeriodicalIF":2.7,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73336019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-22DOI: 10.1080/01919512.2021.1967724
Dan-qiao Wang, Taoran Liu, Lei Ma, Feng Wang, Jimmy Yun, L. Shao
ABSTRACT The degradation kinetics of different organic compounds in a rotating packed bed (RPB) were investigated in this work. Phenol, catechol, hydroquinone, and aniline that can react rapidly with ozone were chosen to be the model pollutants, and the lumped parameter models were established to characterize the reaction rate of fast ozonation of those organic compounds in the RPB. Correlations for the lumped parameters of the organic compounds degradation (A 1) and COD removal (A 2) were obtained by fitting the experimental data. The deviations between experimental and predicted A 1 and A 2 were generally within 25%, indicating that the ozonation rate model has a good predictability for fast ozonation between ozone and organic compounds in the RPB.
{"title":"Degradation Kinetics Study of Fast Ozonation Reaction in a Rotating Packed Bed","authors":"Dan-qiao Wang, Taoran Liu, Lei Ma, Feng Wang, Jimmy Yun, L. Shao","doi":"10.1080/01919512.2021.1967724","DOIUrl":"https://doi.org/10.1080/01919512.2021.1967724","url":null,"abstract":"ABSTRACT The degradation kinetics of different organic compounds in a rotating packed bed (RPB) were investigated in this work. Phenol, catechol, hydroquinone, and aniline that can react rapidly with ozone were chosen to be the model pollutants, and the lumped parameter models were established to characterize the reaction rate of fast ozonation of those organic compounds in the RPB. Correlations for the lumped parameters of the organic compounds degradation (A 1) and COD removal (A 2) were obtained by fitting the experimental data. The deviations between experimental and predicted A 1 and A 2 were generally within 25%, indicating that the ozonation rate model has a good predictability for fast ozonation between ozone and organic compounds in the RPB.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"30 1","pages":"438 - 452"},"PeriodicalIF":2.7,"publicationDate":"2021-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74895749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-09DOI: 10.1080/01919512.2021.1960149
Shu Zhu, G. Cheng, X. Quan, Facheng Qiu, Weiyang Bai, Yijuan Tian
ABSTRACT The strengthening ability of ozone to treat the reverse osmosis concentrate (ROC) of landfill leachate is a crucial issue. From the standpoint of coupling intensification, a ceramic membrane/ozone (CM/O3) system was developed to improve the oxidation performance of ozone. The results showed that CM/O3 system could significantly improve the ozone concentration and the generation of hydroxyl radicals (·OH) when compared to the traditional O3 bubble system. The reaction condition, such as inlet ozone concentration and ozone flow, ceramic membrane pore size, transmembrane pressure, and temperature on the concentration of ozone in the liquid phase and the formation of ·OH, has been considered. Experimental results showed that the concentration of ozone and OH in the liquid increased with the increase in the inlet ozone concentration and ozone flow. Moreover, a certain degree of reduction in membrane pores was facilitated to intensify the mass transfer of ozone. The increase of pressure was able to raise the concentration of ozone. However, there was a slight effect on ·OH concentration. As for the temperature, a low-temperature situation was conducive to strengthen ozone dissolution. In terms of the generation of ·OH, a high-temperature situation was a better favorable environment. In order to evaluate the performance of the reactor system, three treatment processes (CM/O3, CM alone and O3 alone) were compared to treat ROC. In the CM/O3 system, the final removal efficiency of Chemical Oxygen Demand (COD) was 81.9%, and the final removal efficiency of Total Organic Carbon (TOC) was 62.6%.
{"title":"Intensification of Ozone Mass Transfer and Generation of Hydroxyl Radicals by Ceramic Membrane","authors":"Shu Zhu, G. Cheng, X. Quan, Facheng Qiu, Weiyang Bai, Yijuan Tian","doi":"10.1080/01919512.2021.1960149","DOIUrl":"https://doi.org/10.1080/01919512.2021.1960149","url":null,"abstract":"ABSTRACT The strengthening ability of ozone to treat the reverse osmosis concentrate (ROC) of landfill leachate is a crucial issue. From the standpoint of coupling intensification, a ceramic membrane/ozone (CM/O3) system was developed to improve the oxidation performance of ozone. The results showed that CM/O3 system could significantly improve the ozone concentration and the generation of hydroxyl radicals (·OH) when compared to the traditional O3 bubble system. The reaction condition, such as inlet ozone concentration and ozone flow, ceramic membrane pore size, transmembrane pressure, and temperature on the concentration of ozone in the liquid phase and the formation of ·OH, has been considered. Experimental results showed that the concentration of ozone and OH in the liquid increased with the increase in the inlet ozone concentration and ozone flow. Moreover, a certain degree of reduction in membrane pores was facilitated to intensify the mass transfer of ozone. The increase of pressure was able to raise the concentration of ozone. However, there was a slight effect on ·OH concentration. As for the temperature, a low-temperature situation was conducive to strengthen ozone dissolution. In terms of the generation of ·OH, a high-temperature situation was a better favorable environment. In order to evaluate the performance of the reactor system, three treatment processes (CM/O3, CM alone and O3 alone) were compared to treat ROC. In the CM/O3 system, the final removal efficiency of Chemical Oxygen Demand (COD) was 81.9%, and the final removal efficiency of Total Organic Carbon (TOC) was 62.6%.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"29 1","pages":"372 - 383"},"PeriodicalIF":2.7,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88135270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT The oxidation of ozone is very strong, and the products of oxidative decomposition will not cause secondary pollution, so the ozone has become widely used. Dielectric barrier discharge (DBD) is the main method of ozone generation. In recent years, the addition of outfield in the DBD is used to improve ozone generation. In this paper, a needle-plate DBD ozone generator with magnetic field enhanced was designed and manufactured. The authors found the magnetic field could significantly increase the number and amplitude of current pulses, discharge current and the discharge power. The magnetic field did not change the initial discharge voltage. With the discharge voltage increased, the enhancement of magnetic field on ozone concentration was more obvious while on ozone yield was very small. The maximum increment of ozone concentration was 35.4%. With the discharge frequency increased, the magnetic field had a more positive impact on the ozone concentration. And with the same gas flow rate increased, the ozone concentration was increased by the magnetic field. Keeping the SIE constant, the ozone concentration and ozone yield at higher discharge frequency was lower than those at lower discharge frequency. With the increase of SIE, the enhancement effect of magnetic field on ozone concentration would increase.
{"title":"Effect of Magnetic Field on Multi-parameters of Needle Plate DBD Ozone Generator","authors":"Shukai Sun, Ying Chen, P. Yuan, Longsheng Xu, Yafang Zhang, Linsheng Wei","doi":"10.1080/01919512.2021.1960146","DOIUrl":"https://doi.org/10.1080/01919512.2021.1960146","url":null,"abstract":"ABSTRACT The oxidation of ozone is very strong, and the products of oxidative decomposition will not cause secondary pollution, so the ozone has become widely used. Dielectric barrier discharge (DBD) is the main method of ozone generation. In recent years, the addition of outfield in the DBD is used to improve ozone generation. In this paper, a needle-plate DBD ozone generator with magnetic field enhanced was designed and manufactured. The authors found the magnetic field could significantly increase the number and amplitude of current pulses, discharge current and the discharge power. The magnetic field did not change the initial discharge voltage. With the discharge voltage increased, the enhancement of magnetic field on ozone concentration was more obvious while on ozone yield was very small. The maximum increment of ozone concentration was 35.4%. With the discharge frequency increased, the magnetic field had a more positive impact on the ozone concentration. And with the same gas flow rate increased, the ozone concentration was increased by the magnetic field. Keeping the SIE constant, the ozone concentration and ozone yield at higher discharge frequency was lower than those at lower discharge frequency. With the increase of SIE, the enhancement effect of magnetic field on ozone concentration would increase.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"475 1","pages":"384 - 397"},"PeriodicalIF":2.7,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79934509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-02DOI: 10.1080/01919512.2021.1960148
A. P. Ogura, L. P. Sabogal-Paz
ABSTRACT Waterborne diseases are a relevant concern for public health systems since commonly applied treatment techniques may not remove all water contaminants. Cryptosporidium spp. oocysts are an issue in water treatment plants due to their reduced size and resistance to the disinfection process (e.g., chlorination). Moreover, oocysts retained on the filter media might recirculate amongst the filter backwash water (FBW). This study aimed to detect Cryptosporidium parvum oocysts artificially inoculated on the FBW and evaluate the ozone treatment performance. A synthetic FBW underwent three concentration methods followed by immunomagnetic separation: calcium carbonate flocculation, direct centrifugation, and direct centrifugation with the 7X ICN dispersion solution. The latter method was selected as it presented less interference on oocyst viability (37.2% reduction) and higher recovery (22.1%) on preliminary assays. The recovery for the commercial suspensions was 15.4 ± 3.3%, although the analytical quality performed with EasySeed® suspension obtained a recovery of 2.8 ± 0.8%. These limitations and methodologies for protozoan detection are challenging due to low recoveries, especially in complex matrices. Finally, FBW ozonation was performed on a pilot scale, and the propidium iodide dye indicated oocyst viability decreased after treatment. Oocyst inactivation was 2.83 log and 3.44 log for dosages of 7.5 mg O3 L−1 for 10 min (i.e., 75 mg min L−1) and 10 mg O3 L−1 for 5 min (i.e., 50 mg min L−1), respectively. Disinfection is a crucial pathway for addressing outbreak scenarios, and ozone treatment should be further studied. Graphical abstract
水传播疾病是公共卫生系统的一个相关问题，因为通常应用的处理技术可能无法去除所有的水污染物。隐孢子虫卵囊是水处理厂的一个问题，因为它们体积小，对消毒过程(如氯化)有抵抗力。此外，保留在过滤介质上的卵囊可能在过滤器反冲洗水中再循环。本研究旨在检测人工接种的小隐孢子虫卵囊，并评价臭氧处理效果。采用碳酸钙絮凝法、直接离心法和7X ICN分散液直接离心法三种浓缩后的免疫磁分离方法制备合成的FBW。选择后一种方法，是因为其对卵囊活力的干扰较小(降低37.2%)，初步测定回收率较高(22.1%)。商用混悬液的回收率为15.4±3.3%，而EasySeed®混悬液的分析质量为2.8±0.8%。由于回收率低，特别是在复杂的基质中，原生动物检测的这些限制和方法具有挑战性。最后，在中试规模上进行了FBW臭氧化，碘化丙啶染料显示处理后卵囊活力下降。7.5 mg o3l - 1作用10分钟(即75 mg min L - 1)和10 mg o3l - 1作用5分钟(即50 mg min L - 1)时，卵囊失活率分别为2.83 log和3.44 log。消毒是解决疫情的关键途径，臭氧处理应进一步研究。图形抽象
{"title":"Detection of Cryptosporidium Parvum Oocysts in Artificially Contaminated Filter Backwash Water and Ozone Treatment at Pilot Scale","authors":"A. P. Ogura, L. P. Sabogal-Paz","doi":"10.1080/01919512.2021.1960148","DOIUrl":"https://doi.org/10.1080/01919512.2021.1960148","url":null,"abstract":"ABSTRACT Waterborne diseases are a relevant concern for public health systems since commonly applied treatment techniques may not remove all water contaminants. Cryptosporidium spp. oocysts are an issue in water treatment plants due to their reduced size and resistance to the disinfection process (e.g., chlorination). Moreover, oocysts retained on the filter media might recirculate amongst the filter backwash water (FBW). This study aimed to detect Cryptosporidium parvum oocysts artificially inoculated on the FBW and evaluate the ozone treatment performance. A synthetic FBW underwent three concentration methods followed by immunomagnetic separation: calcium carbonate flocculation, direct centrifugation, and direct centrifugation with the 7X ICN dispersion solution. The latter method was selected as it presented less interference on oocyst viability (37.2% reduction) and higher recovery (22.1%) on preliminary assays. The recovery for the commercial suspensions was 15.4 ± 3.3%, although the analytical quality performed with EasySeed® suspension obtained a recovery of 2.8 ± 0.8%. These limitations and methodologies for protozoan detection are challenging due to low recoveries, especially in complex matrices. Finally, FBW ozonation was performed on a pilot scale, and the propidium iodide dye indicated oocyst viability decreased after treatment. Oocyst inactivation was 2.83 log and 3.44 log for dosages of 7.5 mg O3 L−1 for 10 min (i.e., 75 mg min L−1) and 10 mg O3 L−1 for 5 min (i.e., 50 mg min L−1), respectively. Disinfection is a crucial pathway for addressing outbreak scenarios, and ozone treatment should be further studied. Graphical abstract","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"86 1","pages":"426 - 437"},"PeriodicalIF":2.7,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84003169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-01DOI: 10.1080/01919512.2021.1960147
Eduardo de Paula Nascente, Úrsula Nunes Rauecker, A. V. Teles, Lorena Dias do Amor Divino, Sarah Rodrigues Chagas, Luan Mendes Elias, M. P. Matos, M. A. Andrade, L. M. Pascoal
ABSTRACT Salmonella Heidelberg is frequently associated with diseases transmitted by food of animal origin, so that the cleaning and disinfection of pigs farms are important for the control of this pathogen. This research was aimed to test the biocidal potential of ozonated water in different concentrations for the inactivation of a Salmonella Heidelberg isolated from pigs. We analyzed the strain antibiotic sensitivity profile to 17 antimicrobials and exposed the strain to disinfectant and three different concentrations of ozonated water (0.5 mg/L, 2.4 mg/L, and 4.4 mg/L) for one, five, and 10 minutes, in presence and absence of organic matter (OM), and performed a quantitative assessment of the bacterial genomic DNA. Salmonella Heidelberg was characterized as multidrug-resistant. Ozonated water inhibited bacterial growth in the absence of OM after one minute, with changes in bacterial DNA concentration.
{"title":"Inactivation of Multidrug-Resistant Salmonella Heidelberg Isolated from Pigs by Ozonated Water under Different Conditions","authors":"Eduardo de Paula Nascente, Úrsula Nunes Rauecker, A. V. Teles, Lorena Dias do Amor Divino, Sarah Rodrigues Chagas, Luan Mendes Elias, M. P. Matos, M. A. Andrade, L. M. Pascoal","doi":"10.1080/01919512.2021.1960147","DOIUrl":"https://doi.org/10.1080/01919512.2021.1960147","url":null,"abstract":"ABSTRACT Salmonella Heidelberg is frequently associated with diseases transmitted by food of animal origin, so that the cleaning and disinfection of pigs farms are important for the control of this pathogen. This research was aimed to test the biocidal potential of ozonated water in different concentrations for the inactivation of a Salmonella Heidelberg isolated from pigs. We analyzed the strain antibiotic sensitivity profile to 17 antimicrobials and exposed the strain to disinfectant and three different concentrations of ozonated water (0.5 mg/L, 2.4 mg/L, and 4.4 mg/L) for one, five, and 10 minutes, in presence and absence of organic matter (OM), and performed a quantitative assessment of the bacterial genomic DNA. Salmonella Heidelberg was characterized as multidrug-resistant. Ozonated water inhibited bacterial growth in the absence of OM after one minute, with changes in bacterial DNA concentration.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"70 1","pages":"363 - 371"},"PeriodicalIF":2.7,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82250635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-15DOI: 10.1080/01919512.2021.1948388
O. J. Sujayasree, A. Chaitanya, R. Bhoite, R. Pandiselvam, Anjineyulu Kothakota, Mohsen Gavahian, A. Khaneghah
ABSTRACT Mycotoxins are health-threatening fungal metabolites that have been found in several foods around the world. Although agricultural, transportation, and storage management strategies have been employed to reduce the production of mycotoxins, they are not effective in eliminating mycotoxins. In this context, the application of ozone has emerged for the degradation of mycotoxins. Ozone has a strong oxidation rate and generates more free radicals, which can counter the functional groups of the mycotoxin by changing their molecular structures and forming products having lower molecular weight reduced number of double bonds, and reduced toxicity. Research indicates that ozone could be able to destroy mycotoxins without leaving any residues in the commodities. The ozone processing parameters, surface and nutritional properties of food, and fungal species are the primary determinants affecting the processing efficacy. Ozone can contribute to sustainable food consumption through mycotoxin degradation to achieve sustainable development goals (SDGs).
{"title":"Ozone: An Advanced Oxidation Technology to Enhance Sustainable Food Consumption through Mycotoxin Degradation","authors":"O. J. Sujayasree, A. Chaitanya, R. Bhoite, R. Pandiselvam, Anjineyulu Kothakota, Mohsen Gavahian, A. Khaneghah","doi":"10.1080/01919512.2021.1948388","DOIUrl":"https://doi.org/10.1080/01919512.2021.1948388","url":null,"abstract":"ABSTRACT Mycotoxins are health-threatening fungal metabolites that have been found in several foods around the world. Although agricultural, transportation, and storage management strategies have been employed to reduce the production of mycotoxins, they are not effective in eliminating mycotoxins. In this context, the application of ozone has emerged for the degradation of mycotoxins. Ozone has a strong oxidation rate and generates more free radicals, which can counter the functional groups of the mycotoxin by changing their molecular structures and forming products having lower molecular weight reduced number of double bonds, and reduced toxicity. Research indicates that ozone could be able to destroy mycotoxins without leaving any residues in the commodities. The ozone processing parameters, surface and nutritional properties of food, and fungal species are the primary determinants affecting the processing efficacy. Ozone can contribute to sustainable food consumption through mycotoxin degradation to achieve sustainable development goals (SDGs).","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"20 1","pages":"17 - 37"},"PeriodicalIF":2.7,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82653375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-07-07DOI: 10.1080/01919512.2021.1948387
Saranyapak Chamnan, J. Varith, S. Jaturonglumlert, J. Phimphimol, Narathip Sujinda
ABSTRACT The objective of this research was to study the effects of high concentration ozone (HCO) fumigation on the shelf-life of fresh longan. Longan was exposed to ozone gas at varying inlet concentrations of 4,000, 8,500, and 13,000 ppm with holding times of 5 and 15 min. Results showed that the longan exposed to ozone gas at 8,500 ppm for 5 min was considered a suitable treatment to extend shelf-life up to 35 days, which is 57% longer than the shelf-life of non-ozonated longan. The SEM revealed that the ozonated longan had less surface epidermal hairs than the non-ozonated longan.
{"title":"Effects of High Concentration Ozone Gas Fumigation on the Quality and Shelf-life of Longan Fruit","authors":"Saranyapak Chamnan, J. Varith, S. Jaturonglumlert, J. Phimphimol, Narathip Sujinda","doi":"10.1080/01919512.2021.1948387","DOIUrl":"https://doi.org/10.1080/01919512.2021.1948387","url":null,"abstract":"ABSTRACT The objective of this research was to study the effects of high concentration ozone (HCO) fumigation on the shelf-life of fresh longan. Longan was exposed to ozone gas at varying inlet concentrations of 4,000, 8,500, and 13,000 ppm with holding times of 5 and 15 min. Results showed that the longan exposed to ozone gas at 8,500 ppm for 5 min was considered a suitable treatment to extend shelf-life up to 35 days, which is 57% longer than the shelf-life of non-ozonated longan. The SEM revealed that the ozonated longan had less surface epidermal hairs than the non-ozonated longan.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"4 1","pages":"105 - 116"},"PeriodicalIF":2.7,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86094313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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