Water Ozone Research Articles

Consideration of selective and nonselective absorption by water vapor and ozone when sounding atmospheric organic aerosol with a CO<sub>2</sub> laser based IR lidar

Consideration of selective and nonselective absorption by water vapor and ozone when sounding atmospheric organic aerosol with a CO<sub>2</sub> laser based IR lidar

Impact of Ozone Used-Alone and Coagulation Aid Treatment on The Reduction of Trihalomethanes Components

The whole research paper examines the impact of ozone as either a just use-alone and coagulation benefit, mainly upon the reduction of dissolved organic carbon from the water with a moderate rate of DOC 10.75 mg/land CaCO3 calcium hardness 300 mg/l. A raw water sample has been taken from the Tigris River (Baghdad, Iraq) was being adopted in research work. The performance of ozone therapy has been assessed by calculations of DOC, DOC quantities, UV254, as well as total trihalomethane (TTHM). Research findings have shown that with 0.9 mg O3/mg DOC ozone use-alone, approximately 60% UV254 reduction and approximately 28% DOC reduction will occur.DOC fractionation analysis indicates that within the water samples, ozone could alter the composition of DOC, transform the hydrophobic fractions toward hydrophilic fractions and reduce TTHM. Ozone was also responsible for a significant reduction in particle stability as well as the dissolved calcium content. Improved water flocculation and improved DOC removal were triggered by these simultaneous ozonation effects. This resulted in a decrease in the coagulant dosage while the dosage of ozone is considerably higher over 0.3 mg O3/mg DOC has added before ferric sulfate coagulation. The pre-ozonation coagulation method also accomplished favorable removal of TTHM with all tested ozone doses (0 to 0.9 mg O3/mg DOC), resulting in lower TTHM during pre-ozonated coagulated waters unlike those through related ozonated waters.

Ozone Water Bactericidal and Cleaning Effects on Oral Diseases-related Planktonic and Bacterial Biofilms

Ozone Water Bactericidal and Cleaning Effects on Oral Diseases-related Planktonic and Bacterial Biofilms

Water Dissolution of Nitrogen Oxides Produced by Ozone Oxidation of Nitric Oxide

ABSTRACT The study investigated the reactive dissolution of gas phase nitrogen-oxides and ozone in water. Mixtures with variable composition of nitrogen oxides were produced by mixing nitric oxide (NO) with ozone. Pure NO in Ar carrier gas resulted in the production of NO2 − but its production rate was limited by low NO solubility. The presence of NO2 in the gas increased the production of NO2 − while NO3 − was also produced. The presence of N2O5 in the gas abruptly increased the production of NO3 − due to higher solubility of N2O5. In the present configuration, about 8% of NO2 was dissolved in the water while for N2O5 the fraction was 78%.

Reduction of bromate by zero valent iron (ZVI) enhances formation of brominated disinfection by-products during chlorination

Bromate (BrO3−) is a predominant undesired toxic disinfection by-product (DBP) during ozonation of bromide-containing waters. The reduction of BrO3− by zero valent iron (ZVI) and its effect on formation of organic halogenated DBPs during chlorination were investigated in this study. The presence of ZVI could reduce BrO3− to bromide (Br−), and Br− formed could be transformed to free bromine (HOBr/OBr−) during chlorination, further leading to organic brominated (Br-) DBPs formation. Formation of DBPs during chlorination, including trihalomethanes (THMs) and haloacetonitriles (HANs) was detected under different conditions. The results showed that when ZVI dosage increased from 0 to 1 g L−1, the formation of Br-DBPs (e.g., TBM and DBCM) was significantly improved, while the formation of Cl-DBPs (e.g., TCM, TCAN and DCAN) reduced. Higher ZVI dosage exhibited inhibitory effect on Br-DBPs formation due to the competition between ZVI and free chlorine (HOCl/OCl−). The bromine substitution factor (BSF) of THMs significantly decreased from 0.61 ± 0.06 to 0.22 ± 0.02, as the pH was raised from 5.0 to 9.0. Besides, the increase of initial BrO3− concentration significantly improved the formation of Br-DBPs and decreased the formation of Cl-DBPs, leading to an obvious rise on the BSF of THMs. As the initial concentration of HOCl increased, all THMs and HANs gradually increased. Moreover, the analysis based on the cytotoxicity index (CTI) of the determined DBPs showed that reduction of BrO3− by ZVI during chlorination had certain risks in real water sources, which should be paid attention to in the application.

Non-surgical management of chronic periodontitis using subgingival irrigation with ozonized water- A clinical study

Introduction: Periodontitis is the destructive inflammatory disease of the supporting tissue of the teeth resulting in formation of periodontal pocket, gingival recession or both. Ozone (O3) is a triatomic molecule having disinfectant, antimicrobial and healing properties and has shown promising results in the treatment of periodontitis. The present study evaluated the usefulness of ozone water as an adjunct in non-surgical periodontal treatment. Materials and Method: In this split mouth study, 21 sites each of periodontal pockets (? 4mm) in patients with chronic periodontitis were randomly divided into two groups; SRP followed by irrigation with ozonated water test site and SRP followed by irrigation with distilled water (control site).The clinical parameters including plaque index, gingival index, periodontal probing depth and clinical attachment level (CAL) were recorded at baseline and 4 weeks recall. Result: Both the groups (test & control) showed improvement in all the recorded parameters (PI, GI, CAL, PPD) while the test group showed statistically significant reduction in all the clinical parameters compared to control group (p < 0> Conclusion:A single subgingival irrigation with ozonated water can be effectively used as an adjunct to SRP in non-surgical management of chronic periodontitis. Keywords: Chronic periodontitis, scaling, root planing, subgingival irrigation, ozone water, non-surgical therapy

Reduction of severe acute respiratory syndrome coronavirus-2 infectivity by admissible concentration of ozone gas and water.

Severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) is causing the global coronavirus disease 2019 (COVID‐19) pandemic. Because complete elimination of SARS‐CoV‐2 appears difficult, decreasing the risk of transmission is important. Treatment with 0.1 and 0.05 ppm ozone gas for 10 and 20 hr, respectively, decreased SARS‐CoV‐2 infectivity by about 95%. The magnitude of the effect was dependent on humidity. Treatment with 1 and 2 mg/L ozone water for 10 s reduced SARS‐CoV‐2 infectivity by about 2 and 3 logs, respectively. Our results suggest that low‐dose ozone, in the form of gas and water, is effective against SARS‐CoV‐2.

Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO2/GAC

This work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO2. Aniline was selected as a model compound for the accelerator manufacturing industries used in the manufacture of rubber due to its environmental impact, low biodegradability, and harmful genotoxic effects on human health. Based on the evolution of total organic carbon (TOC), aniline concentration measured using high performance liquid chromatography (HPLC), pH and ozone concentration in liquid and gas phase, and catalyst loading, a three-phase reaction system has been modelled. The proposed three-phase model related the ozone transfer parameters and the pseudo-first order kinetic constants through three coefficients that involve the adsorption process, oxidation in the liquid, and the solid catalyst. The interpretation of the kinetic constants of the process allowed the predominance of the mechanism of Langmuir–Hinshelwood or modified Eley–Rideal to be elucidated. Seven intermediate aromatic reaction products, representative of the direct action of ozone and the radical pathway, were identified and quantified, as well as precursors of the appearance of turbidity, with which two possible routes of degradation of aniline being proposed.

MnFe2O4 decorated graphene as a heterogeneous catalyst for efficient degradation of di-n-butyl phthalate using catalytic ozonation in water

Magnetic, stable graphene-MnFe2O4 hybrids were synthesized by co-precipitation method for efficient degradation of di-n-butyl phthalate (DBP) using catalytic ozonation in water. The various synthesized catalysts were systematically characterized, and the catalytic activities in catalytic ozonation system were investigated. Moreover, a detailed mechanism of catalytic ozonation by synergistic function of graphene oxide (GO) and magnetic MnFe2O4 was proposed. Results showed that catalytic ozonation by 5-rGO-MFO-200 (MnFe2O4 calcined at 200 °C after 5 wt% GO doped) could significant boost the DBP degradation, which illustrated by the apparent rate constant (k = 0.0058 min−1) being nearly 4.2 times than that in ozone alone (k = 0.0241 min−1). The increased activities of 5-rGO-MFO-200 for the catalytic ozonation was attributed to its rich concentration of surface hydroxyl sites (SHSC), better charge electron transfer ability, favorable lattice structure and nanoparticles diffusion in contrast to bare MnFe2O4. All catalysts presented good recycling and stability in the repeated batch experiment, and the removal efficiency of DBP only decreased 3% after 5 times. The radical quenching tests verified that hydroxyl radicals (OH) was the dominant reactive oxygen species responsible for DBP degradation. Electrons cycling between Mn2+ and Mn3+ led to the decomposition of ozone to produce OH, which attacked DBP molecules to degrade into small molecular species and then further mineralized into CO2 and H2O. The synergistic function between magnetic MnFe2O4 and GO induced efficient ozone decomposition and more OH production.

Standardization of UV-C treatment, Ozonization and chlorination for reducing microbial growth in carrot under laboratory conditions

The in-vitro lab experiment was conducted at the Department of Food Process Engineering, Agricultural Engineering College & Research Institute, Tamil Nadu Agricultural University, Coimbatore to find out the effect of physical (UV-C treatment) and chemical treatments (Ozonization and Chlorination) on inactivation of microbial growth in freshly harvested new carrot variety korda collected from farmer Mr. Saji in Hanumanthapuram, Ooty, Tamil Nadu. From the results it was observed that by UV-C irradiation there was one log reduction in microbial growth even at 0.050 kg/m2. Hence, the chosen UV-C dosages were not sufficient for inactivation of total microbial load and were not taken for further study. In case of chemical treatment ozonation and chlorination, treatment with different concentration of chlorine viz., 50, 100, 150 and 200 ppm, and Ozonization for 10, 20 and 30 min. It were concluded that the carrot washed in 200 ppm chlorine concentrated water and in 30 min treated ozone water showed 3 log reductions in bacterial and 2 log reduction in fungal population.

Modeling the Mineralization Kinetics of Visible Led Graphene Oxide/Titania Photocatalytic Ozonation of an Urban Wastewater Containing Pharmaceutical Compounds

In a water ozonation process, dissolved organics undergo two reactions at least: direct ozone attack and oxidation with hydroxyl radicals generated from the ozone decomposition. In the particular case of urban wastewater contaminated with pharmaceuticals, competition between these two reactions can be studied through application of gas–liquid reaction kinetics. However, there is a lack in literature about kinetic modeling of ozone processes in water specially in photocatalytic ozonation. In this work, lumped reactions of ozone and hydroxyl radicals with total organic carbon have been proposed. Urban wastewater containing a mixture of eight pharmaceutical compounds has been used to establish the kinetic model that simulates the mineralization process. The kinetic model is based on a mechanism of free radical and molecular reactions and the knowledge of mass transfer, chemical reaction rate constants, and radiation transfer data. According to the model, both single ozonation and photocatalytic ozonation present two distinct reaction periods characterized by the absence and presence of dissolved ozone. In the first period (less than 10 min), pharmaceuticals mainly disappear by direct ozone reactions and TOC variation due to these compounds has been modeled according to gas–liquid reaction kinetics through a lumped ozone-pharmaceutical TOC fast second order reaction. The corresponding rate constant of this reaction was found to change with time from 3 × 105 to 200 M−1 s−1 with Hatta values higher than 0.3. In the second period (nearly 5 h), competition between direct and hydroxyl radical reactions takes place and a kinetic model based on a direct and free radical reaction mechanism is proposed. Main influencing parameters to be known were: Direct ozone reaction rate constant, catalyst quantum yield, and hydroxyl radical scavengers. The first two take values of 0.5 M−1 s−1 and 5 × 10−4 mol·photon−1, respectively, while a fraction of TOC between 10% and 90% that changes with time was found to possess hydroxyl radical scavenger nature.

Impact of the electrochemical treatment on physical and chemical properties of water activated in various devices using electrochemical activation technology

Introduction. Currently, there are various technologies for water treatment and water purification, including ozonation of water, water treatment with UV radiation, ion exchange, magnetization. Electrochemical treatment of water by direct electric current, in which activated water is formed, characterized by many anomalous properties, is a modern approach to water treatment and water treatment. Purpose of the study. The study of the physicochemical properties of water-activated in devices of different manufacturers with different designs. Material and methods. To activate the water, activators were used: AP-1, Melesta, Zdrava, the filter of electrochemical water purification “ Izumrud”. The activity of hydrogen ions and the redox potential of water were measured using an Ecotest-120 ionomer with a switch. To measure the electrical conductivity of the solutions, an Expert-002 conductometer was used. Free chlorine was determined by the photocolorimetric method on a Spectroquant Multy colorimeter. Antioxidant activity was determined spectrophotometrically using a mediator system of potassium ferro-ferricyanide. Results. Chloride ions make a decisive contribution to the change in the physicochemical characteristics of anolyte upon activation of water. Sulfates and bicarbonates do not affect the prooxidant activity of the anolyte. The relaxation of catholytes obtained in membrane activators proceeds by a gradual increase in ORP, while the relaxation of activated water in the Zdrava diaphragmless activator proceeds in an oscillatory mode and is characterized by sharp changes in ORP. Anolytes are stable over time and slightly change the pH and ORP during storage. The activation of certain types of water in a diaphragmless activator does not lead to a decrease in the ORP, but its significant growth. Conclusion. Electrochemically activated water is a general term that hides in each case an unknown substance with an unpredictable effect. The use of standard devices even when using the same water sample, as a rule, leads to different physicochemical characteristics of activated water. When using different types of water, physicochemical characteristics differ significantly. The use of electrochemically activated water is unsafe.

Decentralized solar-powered drinking water ozonation in Western Kenya: an evaluation of disinfection efficacy

Background: Decentralized drinking water treatment methods generally apply membrane-based treatment approaches. Ozonation of drinking water, which previously has only been possible at large centralized facilities, can now be accomplished on a small-scale using microplasma technology. The efficacy of decentralized solar-powered drinking water treatment systems has not previously been described. Methods: We established a 1,000L decentralized solar-powered water treatment system located in Kisumu County, Kenya. Highly contaminated surface water is pumped to the treatment system, which includes flocculation and filtration steps prior to ozonation. Turbidity, total coliform bacteria, and E. coli were measured at various stages of water treatment, and bacterial log reduction values (LRVs) were calculated. Results: Forty-seven trials were conducted in which1000L of water were flocculated, filtered, and ozonated for 180 minutes. Baseline turbidity and E. coli concentrations were reduced from a median of 238 nephelometric turbidity units (NTU) and 2,419.7 most probable number/100mL, respectively, in surface water to 1.0 NTU and undetectable E. coli after ozonation for 180 minutes. The median E. coli LRV was 3.99. Conclusions: The solar-powered, decentralized water treatment system that utilizes ozonation for disinfection was founded to reduce E. coli by more than 3 log-orders of magnitude despite the high turbidity of the raw water. Further research is needed to characterize limitations, scalability, economic viability, and community perspectives that could help determine the role for similar systems in other settings.

Awareness of Medical Applications of Ozonated Water Therapy Among Dental Students

Ozone (O3) happens to be a triple atomic particle that comprises three oxygen iotas with an atomic load of 47.98 g/mol. Ozone is a thermokinetic coseismal particle which, contingent upon framework conditions like temperature and weight, has a short half-life and breaks down into sub-atomic oxygen (O2). Ozone is utilized as medication in many conditions. The study aimed to assess the awareness of medical applications of ozonated water therapy among dental students. A cross sectional study was done with a self-administered questionnaire with 10 questions circulated among 100 dental students. The questionnaire assessed the awareness about ozone water therapy in medical applications, their medicinal uses, antiinflammatory activity, mechanism of action and side effects. The responses were recorded and analysed.87% of the respondents were not aware of medical uses of Ozone water therapy .73% were not aware of antiinflammatory activity of Ozone water therapy.83 % were not aware of the mechanism of action of Ozone water therapy .85% were not aware of side effects of Ozone water therapy. The awareness about the use of Ozone water therapy in medical applications is very less among dental students. Increased awareness programs and sensitization and continuing dental education programs along with greater importance to the curricular modifications should be incorporated to improve the awareness levels.

Decentralized solar-powered drinking water ozonation in Western Kenya: an evaluation of disinfection efficacy

Background: Decentralized drinking water treatment methods generally apply membrane-based treatment approaches. Ozonation of drinking water, which previously has only been possible at large centralized facilities, can now be accomplished on a small-scale using microplasma technology. The efficacy of decentralized solar-powered drinking water treatment systems has not previously been described. Methods: We established a 1,000L decentralized solar-powered water treatment system located in Kisumu County, Kenya. Highly contaminated surface water is pumped to the treatment system, which includes flocculation and filtration steps prior to ozonation. Turbidity, total coliform bacteria, and E. coli were measured at various stages of water treatment, and bacterial log reduction values (LRVs) were calculated. Results: Forty-seven trials were conducted in which1000L of water were flocculated, filtered, and ozonated for 180 minutes. Baseline turbidity and E. coli concentrations were reduced from a median of 238 nephelometric turbidity units (NTU) and 2,419.7 most probable number/100mL, respectively, in surface water to 1.0 NTU and undetectable E. coli after ozonation for 180 minutes. The median E. coli LRV was 3.99. Conclusions: The solar-powered, decentralized water treatment system that utilizes ozonation for disinfection was founded to reduce E. coli by more than 3 log-orders of magnitude despite the high turbidity of the raw water. Further research is needed to characterize limitations, scalability, economic viability, and community perspectives that could help determine the role for similar systems in other settings.

Anaerobic digestibility of resin acids in primary sludge: Effect of ozone pretreatment

Resin acids in pulp and paper mills wastewater are potentially partitioned in the solids in post–primary clarification due to higher hydrophobicity with log Kow ∼1.74–5.80. They are known to adversely affect anaerobic digestion (AD) process, although the effect has not been quantified deterministically in control studies. The objective of the present work was to determine the effect of untreated and ozonated spiked resin acids on AD of primary sludge. Batch adsorption tests were conducted to determine the solid-liquid partition coefficient (Kd) of resin acids on the primary sludge. Higher Kd was obtained at pH 4; however, it was decreased by 78–98% at pH 8. Thereafter, batch AD of model resin acids in primary sludge using food to microorganism ratio (S0/X) of 0.5gtCOD/gVSSindicated only 15–20% removal of resin acids in the liquid phase anaerobically. While, ozonation in pure water using 0.74–1.48 mg O3/mg tCOD showed >90% reduction of the test resin acids, an ozone dose of 0.52 mg O3/mg tCOD reduced 50–70% spiked resin acids’ load to the digester. However, no further removal of resin acids occurred during AD over 30 days. About 42% reduction in methane production compared to the control digestor occurred in the presence of 150 mg/L of resin acids. When treated with 0.52 mg O3/mg tCOD, methane production improved and was comparable to the control digestor, indicating that resin acids may not be detrimental to AD at a concentration range of 45–75 mg/L.

Effect of deep convection on the tropical tropopause layer composition over the southwest Indian Ocean during austral summer

Abstract. Balloon-borne measurements of cryogenic frost-point hygrometer (CFH) water vapor, ozone and temperature and water vapor lidar measurements from the Maïdo Observatory on Réunion Island in the southwest Indian Ocean (SWIO) were used to study tropical cyclones' influence on tropical tropopause layer (TTL) composition. The balloon launches were specifically planned using a Lagrangian model and Meteosat-7 infrared images to sample the convective outflow from tropical storm (TS) Corentin on 25 January 2016 and tropical cyclone (TC) Enawo on 3 March 2017. Comparing the CFH profile to Aura's Microwave Limb Sounder's (MLS) monthly climatologies, water vapor anomalies were identified. Positive anomalies of water vapor and temperature, and negative anomalies of ozone between 12 and 15 km in altitude (247 to 121 hPa), originated from convectively active regions of TS Corentin and TC Enawo 1 d before the planned balloon launches according to the Lagrangian trajectories. Near the tropopause region, air masses on 25 January 2016 were anomalously dry around 100 hPa and were traced back to TS Corentin's active convective region where cirrus clouds and deep convective clouds may have dried the layer. An anomalously wet layer around 68 hPa was traced back to the southeast Indian Ocean where a monthly water vapor anomaly of 0.5 ppmv was observed. In contrast, no water vapor anomaly was found near or above the tropopause region on 3 March 2017 over Maïdo as the tropopause region was not downwind of TC Enawo. This study compares and contrasts the impact of two tropical cyclones on the humidification of the TTL over the SWIO. It also demonstrates the need for accurate balloon-borne measurements of water vapor, ozone and aerosols in regions where TTL in situ observations are sparse.

Dissolution enhancement of reactive chemical species by plasma-activated microbubbles jet in water

Plasma activated water (PAW) has emerged as a viable technique for sterilization process since it contains some long-lived reactive oxygen and nitrogen species along with some very short-lived but strong oxidation agents such as hydroxyl radical (OH*) and superoxide anion (O2−). However, the concentrations of the reactive species such as nitrite, nitrate, and ozone are often insufficient in water for sterilization, or only a small amount of PAW can be generated. In this study, we developed a state-of-the-art approach by combining microbubbles (MBs) and plasma technology in a water recirculation system to enhance the dissolution of reactive species in a large amount of water. The investigations included plasma absorbing power measurement, visualization of plasma-activated microbubbles (PAMBs) generation, bubble size distribution, and the concentration measurements of various reactive species in water, after the air plasma jet and the PAMBs jet treatments, respectively. The results revealed that the plasma absorbing power efficiency could reach up to 71.7% for both plasma jet and PAMBs jet cases, respectively. For the PAMBs jet, the mean equivalent diameter of the bubble was estimated to be 290 μm. The results of the concentrations of chemical species such as nitrite and ozone in PAMBs water could be increased up to twice as high as compared to PAW using the proposed device. Moreover, the concentration of nitrate in PAMBs water was found to be nearly three times greater than that in PAW. Thus, we found that employing the PAMBs jet can significantly increase the concentrations of chemical species in water, which could considerably widen the application.

Stratospheric distribution of methane over a tropical region as observed by MIPAS on board ENVISAT

ABSTRACT The paper essentially deals with the stratospheric distribution of methane (CH4) over the Indian region, based on satellite-borne Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) data as observed during 2003–2012 period. The inter-dependence of CH4 and other trace gases such as Water vapour (H2O), Ozone (O3), and Nitric oxide (NO), variation of the equivalent water and long-term trends in CH4 and H2O is also presented. The CH4 mixing ratio exhibits significant latitudinal and altitudinal dependence. The mixing ration of CH4 varies in the range that goes from [1.8, 2.1] Part per Million by Volume (ppmv) to [1.2, 1.4] ppmv in the upper troposphere to the lower stratosphere. An out of phase relationship is observed between CH4 and H2O in the stratosphere in all the three-latitude regions (0° to 10° N, 10° to 25° N, and 25° to 40° N) addressed in this analysis. It is estimated that about 2.7 molecules of H2O are produced as a result of oxidation of CH4 and the excess in H2O molecules is attributed to other production photochemical process, most important one being the oxidation of H2. The dependence of CH4 to O3 and NO is altitude dependent, exhibiting an exponential decrease in the lower stratosphere and linear relation in the upper stratosphere. The analysis of the equivalent water in the mid-stratosphere shows an irregular variation in the altitude of 23–35 km and a gradual increase as the height increases. The overall change in equivalent water in the stratospheric region is [1, 2] ppmv. No consistent trend is observed in stratospheric CH4. On the other hand, H2O depicts an overall increase.

Effect of Ultrasound Combined with Ozone Water Pretreatment on the Bacterial Communities and the Physicochemical Properties of Red Swamp Crayfish Meat (Procambarus clarkii)

The objective of this research was to investigate the impact of ultrasound cleaning (U) combined with ozone water cleaning (O3) on the bacterial communities and physicochemical properties of red swamp crayfish. After single-factor experiments, 600 W and 45 min for U and 13.28 mg/L and 20 min for O3 were selected as optimal parameters. The combination of ultrasound followed by ozone water cleaning (U/O3) showed the better total viable count (TVC) reduction effect in crayfish than ozone water cleaning followed by ultrasound cleaning (O3/U) and simultaneous ozone water and ultrasound cleaning (U+O3). As expected, U/O3 significantly reduced the relative abundance of Pseudoalteromonadaceae, Fusobacteriaceae, and Plesiomonas_shigelloides, and increased the cleanness of crayfish. Compared with the control (samples cleaned with water), the samples subjected to U/O3 treatment led to the myofibril separations of tail meat and an increase (P 0.05) was found on the physical and sensory qualities, including the expressible moisture, cooking loss, springiness, overall appearance, odor, taste, and integrity of tail meat. Therefore, U/O3 could be a potential cleaning method for crayfish in the food industry.