• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2002년도 학술.기술논문발표회
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• pp.59-62
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• 2002

Recently, advanced system for water and wastewater treatment is introduced and operated because of water pollution and etc. One of this System makes use of O3(Ozone) for water and wastewater treatment. In airtight concrete structure, waterproofing phase as well as water are affected by strong oxidative O3 in the long-term. For this reason, material stability against O3 is examined. Consequently, the purpose of this study is to find out material stability an object of epoxy resin by way of accelerated O3 testing.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제49권8호
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• pp.468-476
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• 2000

Nowadays, ozone is mainly utilized for water treatment and home equipments. Although the demand for ozone is increasing, the ozone yield of silent discharge type ozonizer is low. Therefore, it is expected to improve the energy efficiency and ozone yield of an ozonizer. In this paper, a new ozone generation system is proposed. The 60[Hz] three-phase voltage is applied to three-phase superposed discharge type ozonizer(3PSDO) which has three electrodes(central, internal and external electrodes). There is no discharge pause time when three-phase voltage is applied due to 120-degree phase difference of applied voltage. The synergy effect of the three-phase superposed discharge type ozonizer is investigated by comparing with the three sort of single-phase discharge type ozonizer(1PDO). So, three-phase superposed discharge type ozonizer is able to obtain high ozone yield, and optimize discharge space, because this can increase the discharge power at low applied voltage.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 C
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• pp.1837-1839
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• 2003

Recently deep interests have been paid on the effective generation of ozone, which has been widely used for water treatment, deoderization, color removal and chemical processing of exhausted smoke. The silent discharge reaction has been proposed as the most effective in the many ozone generation methods by electric discharge, because silent discharge excel others in the condition of high ozone generation yield and low power consumption. In this paper, ozone water generated system measure with silent discharge characteristics and pulsed power supply.

• 한국염색가공학회지
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• 제30권1호
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• pp.51-61
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• 2018

In this study, effluent water was produced through Submerged Membrane Bio-Reactor(SMBR) process, which is a simple system and decomposes organic matter contained in wastewater with biological treatment process and performs solid-liquid separation, Especially, ozone oxidation treatment process is applied to effluent water containing fluorescent whitening agent, which is a trace pollutant which is not removed by biological treatment, and influences the quality of reused water. The concentration of $COD_{Cr}$ in the SMBR was $449.3mg/{\ell}-COD_{Cr}$, and the concentration of permeate water was $100.3mg/{\ell}-COD_{Cr}$. The removal efficiency was about 70.1%. The amount of ozone required for the removal of the fluorescent whitening agent in the permeated water in SMBR was $6.67g-O_3/min$, and the amount of ozone required to remove $COD_{Mn}$ relative to the permeate water was calculated to remove $0.997mg-COD_{Mn}$ for 1mg of $O_3$.

• 조명전기설비학회논문지
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• 제21권1호
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• pp.98-103
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• 2007

본 연구에서는 한약재 저장장치를 제작하여 한약재 저장 특성을 연구하였다. 저장장치 내에 있는 램프는 '살균 및 오존선을 방사하는 저압 자외선램프(이하, OZ-Lamp)'이다. 방전에서 발생되는 단파장 자외선의 방사 특징을 이용하여, 살균 및 오존 램프의 역할을 수행하고 있는 OZ-Lamp는 한약재 저장을 위한 용도로 사용된다. 본 연구에서는, 한약재의 고품질 유지를 목적으로 한약재 저장 장치의 오존발생 및 전기적 특성을 연구하였으며, 오존처리, 저장에 따른 한약재의 품질 및 성분 특성을 연구하였다.

• 한국환경과학회지
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• 제20권3호
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• pp.291-299
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• 2011

The main objectives of this research are to investigate characteristics of ozone solubility due to low solubility of conventional bubbles-ozone generators, evaluate the treatment characteristics of reclaiming textile wastewater for industrial water by means of micro/nano bubbles-dissolved ozone flotation(MNB-DOF) process. The textile wastewater used in this research was obtained from final effluent of the textile wastewater in B city. There is a 400L reactor which consists of a micro-nano bubble system and a ozone generator for experiments. As a result of generating micro-nano bubbles (below $0.5{\mu}m$) by using of MNB-DOF process, it improved ozone solubility due to higher ozone transfer rates. Consequently, the shorter ozonation time clearly indicates the lower power costs. The reported results clearly indicated that MNB-DOF process can be effectively and inexpensively. Results of the experiments through MNB-DOF process in this study satisfy all reclaiming standards as industrial water: pH 6.5~8.5, SS 10 mg/L or below, $BOD_5$) 6 mg/L or below, turbidity 10 NTU or below, Coliforms 1,000/100 mL or below. Therefore there is a possibility of the reclaiming of the textile wastewater as industrial water.

• 한국축산시설환경학회지
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• 제15권3호
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• pp.209-216
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• 2009

침전 및 고액분리 후 활성오니 공정 즉 분뇨 오수의 2차 처리공정까지를 거친 돈분뇨슬러리를 대상으로 하여 미세용존 오존 및 초음파와 자외선 그리고 과산화수소 등을 조합하여 적용한 고도처리 시험결과를 요약한 주요결과는 다음과 같다. 1. 돼지분뇨 오수 시료를 대상으로 하여 오존과 UV를 적용하였을 경우 전반적으로 색도와 오염성물질의 농도가 줄어드는 경향이 있었다. 2. 미세용존 오존을 이용하여 오존농도 $52\;g/Nm^3$ 조건에서 색도농도가 각기 다른 시료를 대상으로 하여 30분간 반응시켰을 경우 색도는 각각의 처리구 공히 처리시간의 경과에 따라 감소하는 결과를 보였다. COD를 포함한 오염성 물질의 농도도 처리시간의 경과에 따라 감소하였으며 자외선과 과산화수소 등 유기물질의 분해 및 산화력을 가진 물질의 첨가는 오존처리의 효율을 높이는 역할을 하였다. 3. 오존처리에 의해 처리수 중의 대장균과 살모넬라 수가 감소하였으며 과산화수소를 첨가할 경우 그 감소효과는 더 증가하였다는 경향이 있었다. 오존과 과산화수소수를 병합처리 하였을 경우에는 $7.5{\times}10^\;CFU/mL$ 이었던 살모넬라가 처리 후 10분 만에 10 CFU/L 이하로 낮아졌으며 20분 처리 후에는 오존과 과산화수소수를 병합한 처리구에서는 검출되지 않았다. 이 결과는 과산화수소의 짝염기인 ${HO_2}^-$가 OH 라디칼의 생성을 촉진함으로써 살모넬라 등의 세균감소 효과를 높인것에 기인한 것으로 판단된다.

• 한국물환경학회지
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• 제20권2호
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• pp.126-131
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• 2004

This research sought to compare chlorine, chlorine dioxide and ozone as chemical disinfectants of drinking water, with inactivation of total coliform as the indicator. The inactivation of total coliform was tested against several variables, including the dose of disinfectant, contact time, pH, temperature and DOC. A series of batch processes were performed on water samples taken from the outlet of a settling basin in a conventional surface water treatment system that is provided with the raw water drawn from the mid-stream of the Han River. Injection of 1 mg/L of chlorine, chlorine dioxide and ozone resulted in nearly 2.4, 3.0 and 3.9 log inactivation, respectively, of total coliform at 5 min. To achieve 99.9 % the inactivation, the disinfectants were required in concentrations of 1.70, 1.00 and 0.60 mg/L for chlorine, chlorine dioxide and ozone, respectively. Bactericidal effects generally decreased as pH increased in the range of pH 6 to 9. The influence of pH change on the killing effect of chlorine dioxide was not strong, but that on ozone and free chlorine was sensitive. The activation energies of chlorine, chlorine dioxide and ozone were 36,053, 29,822 and 24,906 J/mol for coliforms with inactivation effects being shown in the lowest orders of these.

• 한국축산시설환경학회지
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• 제17권3호
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• pp.181-188
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• 2011

돈분뇨 슬러리 2차 처리수를 대상으로 하여 오존과 과산화수소 등을 적용한 시험결과를 요약한 주요결과는 다음과 같다. 1. 동일한 시료에 동일한 처리시간 동안 처리하였을 경우, 주입한 오존 농도에 따라 처리수의 색도변화가 육안적으로 쉽게 확인할 정도의 차이를 나타냈다. 2. BOD와 COD 그리고 색도는 처리시간이 경과함에 따라 8.4 g/hr 오존 주입 수준에서의 제거효과가 다른 처리구에 비해 크게 나타났다. 반면에 SS는 오존 적용농도에 큰 영향을 받지 않는 것으로 나타났고, 질소와 인도 오존처리 효율이 높지 않은 것으로 나타났다. 3. 돈분뇨 슬러리 2차 처리수에 오존을 적용할 경우 색도 등 오염성 물질 제거효과와 더불어 생물학적 안정성 확보도 가능한 것으로 판단된다. 4. 돈분뇨 슬러리 3차 처리수에 과산화수소수를 첨가할 경우 2차 오염에 의한 잔존세균의 감소효과 및 암모니아 발산감소로 인해 돈분뇨 2차 및 3차 처리수의 중수도 개념으로서의 재활용 가능성에 대한 긍정적 요인으로 작용할 수 있는 것으로 판단된다.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2016년도 추계학술대회 논문집
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• pp.172-172
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• 2016

The International Maritime Organization(IMO) adopted the International Convention for the Control and Management of Ships' Ballast Water and Sediments in 2004 to prevent the transfer of aquatic organisms via ballast water. Forty ballast water treatment systems were granted final approval. A variety of techniques have been developed for ballast water treatment including UV treatment, indirect or direct electrolysis, ozone treatment, chemical compounds and plasma-arc method. In particular, using plasma and ozone nano-bubble treatments have been attracted in the fields. However, these treatment systems have a problem such as remained toxic substance, demand for high power source, low efficiency, ets. In this paper, we present our strilization results obtained from membrane type electrolytic-reduction treatment system The core of an electrolysis unit is an electrochemical cell, which is filled with pure water and has two electrodes connected with an external power supply. At a certain voltage, which is called critical voltage, between both electrodes, the electrodes start to produce hydrogen gas at the negatively biased electrode and oxygen gas at the positively biased electrode. The amount of gases produced per unit time is directly related to the current that passes through the electrochemical cell. From the results, we could confirm the sterilization effect of bacteria such as S. aureus, E. Coli and demonstrate the mechanism of sterilization phenomena by electrolytic-reduction treatment system.