• Title/Summary/Keyword: ozone water

Search Result 583, Processing Time 0.029 seconds

Development of a Micro-Bubble System for Ozone Off-Gas Recycling in the Ozone Treatment Process (오존처리공정의 배오존 재활용 마이크로버블시스템 개발)

  • Young-Man, Cho;Jae-Ouk, Jung;Kwang-Heon, Lee;Yong-Jun, Jung
    • Journal of Environmental Science International
    • /
    • v.31 no.12
    • /
    • pp.1061-1068
    • /
    • 2022
  • The purpose of this study was to develop a recycling system for ozone off-gas. Although the ozone transmission rate of the injector method differs slightly depending on the ozone injection rate, it reaches approximately 99%, which is very high. During the increase in water inflow to the ozone recycling system from 2 L/min to 10 L/min, the average ozone recycling rate was 99.4% at a 1 ppm ozone injection rate, 98.6% at a 2 ppm ozone injection rate, 98.1% at a 3 ppm ozone injection rate. Ozone treatment facility operating costs can be divided into the costs of pure oxygen production, ozone production, and maintenance. The annual operating costs of ozone treatment facilities in Korea are estimated to be approximately 38.9 billion won. The annual savings are estimated to be approximately 5.8 billion won when the ozone transfer rate of the diffuser method, which is mostly employed in domestic water treatment plants, is 85% and 15% of the ozone is recycled.

The Study on the Development of Ozone Water Diffusion Device by Ozonated Olive Oil Mix Ratio that will Increase (올리브 오일의 오존화 혼합비율을 높여주는 오존수 확산장치개발에 관한 연구)

  • Kim, Duck-Sool
    • Journal of the Korean Applied Science and Technology
    • /
    • v.31 no.4
    • /
    • pp.688-693
    • /
    • 2014
  • This study is to increase the utilization of the ozonated water generator to make it easier to take advantage of the ozone water in the world today, there will be to develop a system that operates in one motion. Furthermore, olive oil and ozone is reacted with the wish to apply to the manufacturing technology. In the case of many existing products ozone generator driven mostly non-ozone system. In the case of ozone, but handwriting is implied general way pressure ozone gas leakage risks of suction force to the pump, it is the case of the challenge by using the injector, and limit the generation of ozone and ozone inhalation according to whether the water inlet leakage of existing products risk due to minimized. Despite the disadvantages of the injector system was found the effectiveness of the ozonated water production unit injector system used in this study to maintain the microbiological disinfection performance.

Semiconductor Wafer Cleaning and PR Strip Processes using Ozone (오존을 이용한 반도체 웨이퍼 세정 및 PR 제거 공정)

  • 채상훈;정현채;문세호;손영수
    • Proceedings of the IEEK Conference
    • /
    • 2003.07b
    • /
    • pp.1089-1092
    • /
    • 2003
  • This paper has been studied on wafer cleaning and photoresist striping in semiconductor fabrication processes using ozone solved deionized water. In this work, we have developed high concentration ozone generating system and high contact ratio ozone solving system to get high efficiency DIO$_3$. Through this study, we obtained 11% ozone gas concentration, 99.5% of ozone efficiency and 51% of solubility in deionized water.

  • PDF

Phenanthrene으로 오염된 불포화토양내에서 오존이동 모델링

  • 정해룡;배기진;최희철
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • 2002.09a
    • /
    • pp.86-88
    • /
    • 2002
  • The mathematical model was proposed to simulate ozone transport and remediation in unsaturated soils contaminated with phenanthrene. Soil column experiments were also carried out to calibrate the mathematical model. The experimental results successfully matched with the modeling results in various soil conditions. The model proposed nondimensional fraction factor to reveal reactivity between phenanthrene and gas phase ozone and liquid phase ozone. From sensitivity analysis, the fraction factor and stoichiometric coefficient decreased as water content increased. Simulation results showed increased SOM content retarded the ozone transport and the phenanthrene removal due to increased ozone consumption.

  • PDF

Advanced Water Treatment by Ozonation in a Continuous Flow System (연속식 오존접촉조에서의 정수처리효과에 대한 연구)

  • Lee, Byung-Ho;Jung, Woo-Sung;Kim, Jae-Hoon;Lee, Jun-Hee;Kim, Tae-Gun
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.11 no.2
    • /
    • pp.94-104
    • /
    • 1997
  • Ozone Treatment is getting a common process in a water treatment plant all over the nation. Especially an advanced water treatment using ozone and biofiltration has been a typical method in the regions where using the Nak-Dong River as a drinking water source. The effectiveness of ozone treatment in a continuous flow contact system was investigated with sand filtered water of the Nak-dong River. Pilot tests of the experiments were performed three times of the year like June, August, and October 1995. Most degradable organics of sand filtered water were oxidized in the first and second contact chamber of the system. Ozone treatment was effective for the removal of UV254 absorbance. However, Noticeable removals of $KMnO_4$ demand and TOC(Total Organic Carbon) were occurred when their concentrations exceeded about 5mg/l. The organics causing $KMnO_4$ demand and TOC were degraded into lower molecular matter in an early stage of the ozone contact in the system. Dissolved oxygen concentration was increased after ozone treatment.

  • PDF

Removal of residual ozone in drinking water treatment using hydrogen peroxide and sodium thiosulfate (과산화수소와 티오황산나트륨을 이용한 정수처리공정에서의 잔류오존 제거)

  • Kwon, Minhwan;Kim, Seohee;Ahn, Yongtae;Jung, Youmi;Joe, Woo-Hyun;Lee, Kyunghyuk;Kang, Joon-Wun
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.29 no.4
    • /
    • pp.481-491
    • /
    • 2015
  • The aim of this study was to evaluate the chemical quenching system for residual ozone and to determine the operating condition for the quenching system. Hydrogen peroxide ($H_2O_2$) and sodium thiosulfate ($Na_2S_2O_3$) were investigated as quenching reagents for ozone removal, and the tendency of each chemical was notably different. In the case of $H_2O_2$, the degradation rate of ozone was increased as the concentration of $H_2O_2$ increase, and temperature and pH value have a significant effect on the degradation rate of ozone. On the other hand, the degradation rate of ozone was not affected by the concentration of $Na_2S_2O_3$, temperature and pH value, due to the high reactivity between the ${S_2O_3}^{2-}$ and ozone. This study evaluates the decomposition mechanism of ozone by $H_2O_2$ and $Na_2S_2O_3$ with consideration for the water quality and reaction time. Furthermore, the removal test for the quenching reagents, which can be remained after reaction with ozone, was conducted by GAC process.

Effect of Ozone Treatment on the Quality of Soybean Sprouts 2. Optimum Conditions of Ozone Treatment during Soaking of Soybean for Quality Enhancement of Soybean Sprouts (콩나물의 품질에 미치는 오존처리 효과 2. 콩의 수침중 오존처리의 최적화)

  • 김일두;박미자
    • Food Science and Preservation
    • /
    • v.5 no.2
    • /
    • pp.177-185
    • /
    • 1998
  • For the purpose of enhanceing soybean-sprouts quality, the optimum conditions for ozone treatment of soybean during soaking before cultivation at 18~2$0^{\circ}C$ were evaluated with ozone concentration, treatment time and treatment frequency by response surface methodology. Germination rates of cleaned soybean by ozone water in the conditions of solubilized-ozone concentrations of 0.15 to 0.35ppm, ozone-treatment frequency of 1.5 to 2.3 times and ozone-treatment time of 30 to 36min. increased 18.8 to 24.0% for the control products. And, length of hypocotyl in conditions of 0.12 to 0.33ppm, 1.7 to 2.7 times and 45 to 90min. were also increased by 69.36 to 79.40%. On the other hand, weight of roots with ozone treatment were decreased in the conditions of solubilized ozone concentrations of 0.1 to 0.2ppm and ozone-treatment time of 30 to 57min. But, ozone-treatment frequency did not affected root growth. Putrefaction rates of the control were 5 to 15%, but those of ozone-treated samples during cultivation did not show. The overall optimum conditions for above 16% germination rates, above 9% hypocotyl yields compared to the control samples and below 98% of the control root weight were solubilized-ozone concentrations of 0.25 to 0.30ppm, ozone-treatment time of 43 to 49min. and ozone-treatment frequency of one time.

  • PDF

A study on sanitary emprical for specific property removal of pollution material inter a water tank by ozone (오존을 이용한 수조속의 오염물질 제거특성에 관한 실험적 연구)

  • Lee, Kwan-young;Ahn, Seoung-Seop;Park, Sang-hyun
    • Journal of the Korean Society of Industry Convergence
    • /
    • v.5 no.1
    • /
    • pp.75-80
    • /
    • 2002
  • In this study, the initial number of bacteria before ozone sterilizing shows 290 per $1m{\ell}$ in RUN 1 and RUN 2 equally, but the removal rate shows more than 50% in RUN 1, and 100% in RUN 2 respectively when ozone injection amount is $0.28mg/{\ell}$. It is regarded as a satisfactory result that E-coli concentration without ozone contact is 890, rapid removal effect of E-coli is observed in $0.28mg/{\ell}$ of ozone, and E-coli is removed perfectly in $0.84mg/{\ell}$ of ozone. It is thought that an excellent efficiency is obtained for vibrio alginolyticus because the initial number of bacteria before ozone contact is positive, but it is altered to negative after ozone contact. CODcr shows the tendency which is somewhat reduced as the ozone injection is increased, but the general effect is appeared not so much, and it is thought that the tendency is caused by the reason that sea water contains much salt which is estimated as a component of CODcr, therefore it is regarded that ozone contact has not an important effect on salinity. It is thought that the frequency of changing salt water in the fish preserve of a sliced raw fish restaurant can be reduced to under the standard because NTU of 7 days after sea water injection is 0.70 in the experiment of turbidity, hut more than 50% of turbidity removal efficiency is appeared at $0.28mg/{\ell}$ of ozone injection, and it shows 70% at $0.84mg/{\ell}$ of ozone injection in RUN 1 and RUN 2 commonly.

  • PDF

Optimal Conditions for the Growth of Soybean Sprouts by Ozone Water Watering (오존수 살수(撒水)에 의한 콩나물의 성장조건 최적화)

  • 김일두;김순동
    • Journal of the East Asian Society of Dietary Life
    • /
    • v.11 no.3
    • /
    • pp.219-224
    • /
    • 2001
  • This study was conducted to investigate the optimal conditions for the growth of soybean sprouts by ozone water watering. Optimal conditions for ozone water watering of soybean sprouts during cultivation at 2$0^{\circ}C$ were evaluated with ozone concentration(0.1~O.5 ppm) and watering frequency(1~9 times) by response surface methodology. The optimal conditions for growth of soybean sprouts were ozone concentrations of 0.20~0.32 ppm, ozone treatment frequency of 3.0~4.4 times. Germination rates, hypocotyl weights and hypocotyl lengths in the soybean sprouts cultivated under the optimal conditions increased by 13.3, 10.1 and 11.9%, respectively, whereas root weights decreased by 89.0%.

  • PDF

Effect of Gas Composition on Ozone Generation in Silent Discharge Process

  • Chung, Jae-Woo;Suh, Hyun-Hyo;Park, Hyun-Geoun
    • Journal of Korean Society for Atmospheric Environment
    • /
    • v.19 no.E4
    • /
    • pp.169-175
    • /
    • 2003
  • The effect of gas composition on the discharge characteristics and the ozone production in silent discharge (SD) process was investigated. The major gas components, $N_2$, $O_2$, and $H_2O$ influence the discharge properties according to their relative magnitude of ionization thresholds and electron affinities. The generated amount of ozone increased with the discharge energy by increasing the electron mean energy. The higher oxygen content injected, the higher ozone produced. A small amount of water vapor significantly lowered the discharge onset voltage by the ionization threshold decreasing effect and high electrical conductivity. However, the further increase of water vapor contributes to decrease the electron density by the electron affinity The addition of water greatly reduced the ozone generation through the formation of OH radical and the catalytic ozone destruction process.