식품 가공 공정에서의 오존수 관리 동향, 사용 실태 및 활용 방안

김용수,김애영,전경민,서유미,최성희,이영자,최현철,전대훈,김형일,박인숙,하상도 한국식품위생안전성학회 2008 한국식품위생안전성학회지 Vol.23 No.2

The ozone has the oxidizing power which is powerful the fluorine and the antimicrobial spectrumof wide scope. Researches were carried out to use the merits that ozone has in various fields including the food indus-try, and many studies are also conducted nowadays for more efficient use of ozone. The ozone was permited legallyas a fod additive and was practicaly used in the United States, Australia, Japanese etc. In November 2007, ozonewater was permitted as a food aditive in Korea and the interest in the use of ozone water has been on the rise in theKoreas fod industry. As a olisinfectant method, ozone has many advantages. The maintenance and managementexpenses of ozone are lower than the instalation cost at early stages and no by-products are generated after use it com-water is popularly used to sterilize raw fods like fruits, vegetables and meats, the cases are still limited and wereverified by the survey results. However, the use of ozone water is gradually being increased and is focused on fodservices. Ozone water refers to a state where ozone is dissolved into water to more conveniently use ozone. Accord-ingly, ozone water should be managed in regards with the amount and time of water-disolved ozone, and the controlof discharged ozone concentration is required for safe use of ozone water. The items to control mentioned above aredirectly related to the performance of the devices, and therefore, it is required to newly establish the performance cri-teria of ozone water manufacturing devices.

Ozone-induced COPD mouse model reflects the detrimental effects of aging as well as ozone on the lung

( So Ri Kim ),( Yong Chul Lee ),( Kyeong Hwa Park ),( Hae Jin Park ),( Navin Ray ),( Yeong Hun Choe ),( Seung Yong Park ),( Jae Seok Jeong ) 대한결핵 및 호흡기학회 2018 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.126 No.-

To understand the pathogenesis of chronic obstructive pulmonary diseases (COPD) and to screen new drug targets, the valid animal model is required. A cigarette smoke (CS)-induced model remains the most popular one. However, it usually requires 3-12 months to induce the COPD animal model by CS which is such a time-consuming and labor-intensive process. In this study, we aimed to establish the protocol for the ozone-induced COPD murine model and to differentiate the aging effects from the real ozone-induced detrimental effects on the lung in the mice. Ozone-induced COPD murine model was established by the exposure to 3 ppm of ozone twice a week for 7 weeks. Time-course analysis showed that the number of BAL cells was increased in air-exposed mice and ozone-exposed mice at the same age (i.e.,14 weeks) compared to young air-exposed mice (i.e.,6-7 weeks). The expression of TGF-β, IL-17, and IL-1β is gradually increased as ozone-exposed time goes by up to 7 weeks (TGF-β, IL-17) and 6 weeks (IL-1β), respectively. In addition, ozone-exposed mice for 7 weeks revealed that decreased lung function (FEV0.1) and increased alveolar destruction in lung tissues compared to air-exposed mice. Interestingly, old air-exposed mice (14 weeks) showed more severe lung destruction than young aged air-exposed mice (6-7 weeks). These findings suggest that ozone-exposed mice can be used for preclinical experiments regarding COPD as a better choice than CS-induced models and that this mouse model reflects the detrimental effects of aging as well as ozone on the lung more physiologically.

오존, 오존/과산화수소와 오존/활성탄 처리에 의한 페놀 및 그 부산물의 제거에 관한 연구

배현주,김영규,정문호 한국환경보건학회 1997 한국환경보건학회지 Vol.23 No.3

This study was performed to delineate the removal phenol in solutions using of ozone, ozone/$H_2O_2$ and ozone/GAC. The disinfection by-product of phenol by ozonation, hydroquinone, was analyzed and it s control process was investigated. The followings are the conclusions that were derived from this study. 1. The removal efficiency of phenol by ozonation was 58.37%, 48.34%, 42.15%, and 35.41% which the initial concentration of phenol was 5 mg/l, 10 mg/l, 15 mg/l, and 20 mg/l, respectively. 2. The removal efficiency of phenol by ozonation was 42.95% at pH 4.0 and 69.39% at pH 10, respectively. The removal efficiencies were gradually increased, as pH values were increased. 3. With the ozone/$H_2O_2$ combined system, the removal efficiency of phenol was 72.87%. It showed a more complete degradation of phenol with ozone/$H_2O_2$ compared with ozone alone. 4. When ozonation was followed by filtration on GAC, phenol was completely removed. 5. Oxidation, if carried to completion, truly destroys the organic compounds, converting them to carbon dioxide. Unless reaction completely processed, disinfection by-products would be produced. To remove them, ozone/GAC treatment was used. The results showed that disinfection by-product of phenol by ozonation, hydroquinone, was completely removed. These results suggested that ozone/GAC should also be an appropriate way to remove phenol and its by-product.

A case study on the automatic ozone dose control system based on the ozone decay rate in a full-scale advanced water treatment plant

Jeon, Jei-cheol,Jo, Chang-Hyun,Kwon, Soon-Buhm,Lee, Kyung-Hyuk Balaban Publishers 2011 Desalination and water treatment Vol.33 No.1

<P> Recently, a growing concern about algae-origin taste and odor in drinking water made it possible to introduce ozone and granular activated carbon (GAC) processes to large-capacity (more than 300,000 m<SUP>3</SUP>/d) water treatment plants in the Han River area in South Korea. Especially, concerning the ozone process, the ozone residual of ozone contactor effluent may affect on the biological destabilization, poor physical properties of the following GAC process and operators’ health due to high ozone gas concentration in GAC contactor. Therefore, maintaining an optimal ozone dose based on the ozone demand is essential to the operation of the ozone process. The Koyang Advanced Water Treatment Plant (KAWTP) has been utilizing a new type of ozone control method since July 2009, which automatically calculates required ozone dosed based on the instantaneous ozone demand (ID) and the ozone decay rate constant (K<SUB>c</SUB>). The ID and the first-order K<SUB>c</SUB> values are calculated based on the measured dissolved-ozone concentrations from at least three points of ozone contactor. After the calculations of ID and K<SUB>c</SUB> values, the values were applied for the proportional integral derivative (PID) ozone dose control system. PID control is operated through two different methods. The first involves automatic controlling the ozone dose, by which the ozone residual of the effluent from the ozone contactor will be maintained at the desired value set by the operator. The second method was the modified extended CSTR method, which was appropriately modified to fit the KAWTP site specifications, to calculate the Cryptosporidium, Giardia and virus log inactivation automatically. An automatic ozone dose control system based on the ozone decay rate overcomes the disadvantages of the previous ozone control systems, including late response and variation of effluent ozone residual. In the earlier pilot scale research, an extra device for measuring K<SUB>c</SUB> and ID was used. In this study, the ozone dose was determined by measuring Kc in the full-scale ozone process. It is the first case in Korea that applied ID-K<SUB>c</SUB>-based ozone dose control to a full-scale water treatment plant. According to the operation results of the automatic ozone dose control system based on K<SUB>c</SUB> calculation, adequate-ozone-dose calculation along with the various water quality and inflow rate was performed successfully, and the ozone residual of the effluent was also maintained below the lowest set value during operation. Moreover, the process was adequately run to maintain the target log inactivation the Cryptosporidium. Also, calculating the optimal ozone dose that could completely oxidize ozone-consuming matters and leave minimum residual, could be economical due to excessive ozone dose saving, and the biological and physical stability of GAC granule in GAC process. </P>

부식산 제거율 향상을 위한 오존공정의 개선에 관한 연구

이유미,손일호,이동석 강원대학교 산업기술연구소 2007 産業技術硏究 Vol.27 No.A

Ozone alone, Ozone/GAC, Ozone/H_(2)O_(2) and Ozone/GAC/H_(2)O_(2) processes were introduced for treatment of humic acid, which is a representative refractory organic compound. H_(2)O_(2) and GAC used as catalysts for experiment. The treatment efficiencies of humic acid in each process were analyzed for pH variation, DOC removal, and UV_(254) decrease. UV_(254) decrease in Ozone/GAC and Ozone/GAC/H_(2)O_(2) processes were the highest with about 93%, and Ozone alone and Ozone/H_(2)O_(2) processes were 88%. DOC removal in Ozone/GAC/H_(2)O_(2) process was the highest with 71%. Removal by Ozone/GAC, Ozone alone, and Ozone/H_(2)O_(2) processes were 66%, 39%, and 47%, respectively.

오존 기상처리방법에 의한 비스코스 레이온의 탈색효과

김경아,이문수,Kim, Gyoung-A,Lee, Mun-Soo 배재대학교 자연과학연구소 1998 自然科學論文集 Vol.10 No.1

본 연구는 오존의 강한 산화력을 이용하여 기상의 처리방법에 따른 비스코스 레이온의 탈색효과를 연구하였다. 오존이 발생할 때는 기체상태로 고농도이지만, 수용액 상태로 물에 녹이는 과정에서 기화요인에 의하여 오존의 손실이 많았다. 따라서 기존의 오존처리방법인 수용액상태의 처리방법이 아니라 기상의 오존을 직접 직물에 처리하므로 고농도의 오존을 단시간동안 처리하여 직물에 존재하는 색소를 산화시켜 탈색하는 방법을 사용하였다. 기상의 오존은 직접 유기색소와 반응하지 않기 때문에 물을 매개체로 하여 pick up ratio를 60%, 50%, 40%, 30%, 20%로 변화시키면서 비스코스 레이온의 탈색에 대하여 연구하였다. Pick up ratio가 40%일 때가 유기색소를 분해하는데 필요한 최적의 수산기가 발생하므로 처리포의 탈색효과가 가장 좋았다. 그러나 처리기간이 길수록 너무 과다하게 오존에 의해 산화되므로 강도와 신도의 저하를 초래하였다. 따라서 최적의 기상오존 처리시간은 60분정도에서 처리하는 것이 강도와 신도의 저하를 가장 적게 할 수 있고 백도도 향상시킬 수 있는 것으로 사료된다. We studied on the decoloring effect of viscose rayon by vapor type ozone processing using ozone's strong oxidation. When ozone is generated, it becomes high concentration in vapor state, but in the insolving process with water, there are a lot of lose of ozone. As a result, a study using ozone in vapor-high concentration state is needed. So, in this paper, vapor type ozone processing is used unlike previous ozone treatment method-an aqueous solution method-to get a good effect from shortening the processing time. When vapor type ozone processing was directly treated to fabrics, high concentration ozone was generated then in a short time oxidized a dye existed in fabrics and finally decolored it. As vapor type ozone did not directly response to an organic dye, viscose rayon's decolorization was to be studied by changing pick up ratio(60%, 50%, 40%, 30%, 20%) using water as a medium. When pick up ratio of water was 40%, fabric's whiteness was improved but tensile strength and elongation were reduced. So 60 minutes was assumed as the most adjust time to minimize the reduction of fabric's tensile strength and elongation moreover of maximize the improvement of whiteness.

새로운 형태의 평판형 오존발생기 특성과 응용

이광식(Kwang-Sik Lee),방아위(Ya-Wei Fang),김영훈(Yeong-Hun Kim),윤대희(Dae-Hee Yoon),이창호(Chang-Ho Lee) 한국조명·전기설비학회 2008 조명·전기설비학회논문지 Vol.22 No.12

본 연구는 실내공기와 상수의 수질개선을 위하여 소형 평판형 오존발생기(plate-type ozonizer: PTO)를 개발하여 그 특성을 규명한 논문이다. 평판전극의 크기, 개수 및 배치에 따라 다양한 형태의 오존발생기가 고안되었다. 각 형태의 오존발생기의 방전 면적은 60[cm²]로 동일하며 방전전력은 최대 30[W]이다. 주요 연구 대상은 방전전력 오존생성농도 특성, 방전전력-오존생성수율 특성, 유량-오존생성능도 특성 및 유량-오존생성수율 특성이다. 오존생성특성은 PTOL-P가 가장 우수하게 나타났으며, 나머지 3종류의 오존발생기 (PTO<SUB>P-P</SUB>, PTO<SUB>C-P</SUB>, PTO<SUB>T-P</SUB>)에서는 유사한 결과를 얻을 수 있었다. It is the paper that this study develops the small plate-type ozonizer(PTO) for improvements of indoor air and water, and investigated the characteristics. Electric discharge area of ozonizer of each form is same to 60[cm²], and discharge power is the maximum 30[W]. Ozonizer of various forms was devised according to size, numbers and arrangement. The main study object is discharge power-ozone concentration characteristics, discharge power-ozone yield characteristics, amount of gas flow-ozone concentration characteristics and amount of gas flow-ozone yield characteristics. PTOL-P appeared so as to be most excellentm and ozone generation characteristics were able to get the similar results at three kinds of remaining ozonizer (PTO<SUB>P-P</SUB>, PTO<SUB>C-P</SUB>, PTO<SUB>T-P</SUB>).

The effects of pycnogenol on antioxidant enzymes in a mouse model of ozone exposure

이민성,박무균,장안수,문국영,배다정 대한내과학회 2013 The Korean Journal of Internal Medicine Vol.28 No.2

Background/Aims: Ozone is an environmentally reactive oxidant, and pycnogenol is a mixture of f lavonoid compounds extracted from pine tree bark that have antioxidant activity. We investigated the effects of pycnogenol on reactive nitrogen species, antioxidant responses, and airway responsiveness in BALB/c mice exposed to ozone. Methods: Antioxidant levels were determined using high performance liquid chromatography with electrochemical detection. Nitric oxide (NO) metabolites in bronchoalveolar lavage (BAL) fluid from BALB/c mice in filtered air and 2 ppm ozone with pycnogenol pretreatment before ozone exposure (n = 6) were quantified colorimetrically using the Griess reaction. Results: Uric acid and ascorbic acid concentrations were significantly higher in BAL fluid following pretreatment with pycnogenol, whereas γ-tocopherol concentrations were higher in the ozone exposed group but were similar in the ozone and pycnogenol pretreatment groups. Retinol and γ-tocopherol concentrations tended to increase in the ozone exposure group but were similar in the ozone and pycnogenol pretreatment groups following ozone exposure. Malonylaldehyde concentrations increased in the ozone exposure group but were similar in the ozone and pycnogenol plus ozone groups. The nitrite and total NO metabolite concentrations in BAL fluid, which parallel the in vivo generation of NO in the airways, were significantly greater in the ozone exposed group than the group exposed to filtered air, but decreased with pycnogenol pretreatment. Conclusions: Pycnogenol may increase levels of antioxidant enzymes and decrease levels of nitrogen species, suggesting that antioxidants minimize the effects of acute ozone exposure via a protective mechanism.

폐수방류수 오존처리시 오존 및 OH 라디칼 노출량 기반 미량유기오염물질 제거 예측

남숙현,황태문,김은주,신용현,이광희,김유곤,이윤호 한국수처리학회 2022 한국수처리학회지 Vol.30 No.4

Municipal wastewater is a major source of contaminants of emerging concern in aquatic environments. Many studies have proven the effectiveness of ozonation for the removal of micropollutants, though the composition of the wastewater matrix influences the oxidation potential during this process. The ozone decomposition rate consists of two stages: instantaneous ozone consumption and slower ozone decay. In particular, with instantaneous ozone consumption, 62.8-79.7% of the initial ozone injection concentration is consumed. Determining the appropriate ozone dosage for wastewater ozonation is complicated by the complexity of the wastewater matrix composition. The purpose of this study was to propose a chemical kinetic model for the prediction of micropollutant removal during the ozonation of wastewater effluent. A kinetics approach based on the measurement of ozone and hydroxyl radical(·OH) exposure was proposed to predict the micropollutant removal efficiency. In this study, a batch-type ozone reactor was set up to measure the ozone and OH radical exposure during wastewater ozonation. Ozone and OH radical exposure was proportional to the initial dose of ozone, while OH radical exposure was found to be proportional to ozone exposure, though the deviation was relatively high at 1.0 to 1.5 gO3/gDOC. The calculated OH radical exposure was 3.0×10-10 to 5.3×10-10M·s. Of the target micropollutants, acetaminophen, sulphamethoxazole, andnaproxen, which are highly reactive with ozone and OH radicals, exhibited a removal rate of more than 80% at an ozone injection rate of 0.75 gO3/gDOC. .

서울과 부산지역 기상의 영향을 제거한 오존농도 추세

김유근,오인보,황미경 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.5

Surface ozone concentrations are highly sensitive to meteorological variability. Therefore, in order to reveal the long-term changes in ozone due to the changes in precursor emissions, we need to remove the effects of meteorological fluctuations on the annual distribution of surface ozone. In this paper, the meteorologically adjusted trends of daily maximum surface ozone concentrations in two major Korean cities(Seoul and Busan) are investigated based on ozone data from II(Seoul) and 6(Busan) sites over the period 1992~2000. The original time series consisting of the logarithm of daily maximum ozone concentrations are splitted into long-term, seasonal and short-term component using Kolmogorov-Zurbenko(KZ) filter. Meteorological effects are removed from filtered ozoned ozone series using multiple linear regression based on meteorologcial variables. The long term evolution of ozone forming capability due to changes in precursor emission can be obtained applying the KZ filter to the residuals of the regression. The results indicated that meteorologically adjusted long-term daily maximum ozone concentrations had a significant upward trend(Seoul:+3.02%yr¹, Busan: +3.45%yr¹). These changes of meteorologically adjusted ozone concentrations represent the effects of changing background ozone concentrations as well as the more localized changes in emissions.