• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1206-1207
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• 2015

실내공기 정화를 목적으로 하는 에어컨이나 공기청정기 등의 경우 사용시간이 길어질수록 공기 정화용 필터에 오염물질이 축적되고 수많은 세균이 필터에 증식하게 되며, 이에 대한 유효한 살균방법 중의 하나인 오존살균방법을 이용하게 된다. 오존은 강력한 살균력과 단시간의 환원작용으로 인해 이차적인 잔류 오염물질을 남기지 않는다는 장점이 있다. 본 연구에서는 선대 그물형 전극을 적용한 실내필터 살균용 오존 발생장치의 선전극 개수에 따른 살균을 위한 최적의 오존 발생 특성에 대한 실험을 수행하였다. 실험결과, 실내필터 살균을 위한 최적의 오존농도는 약 2[ppm] 정도가 요구되므로, 본 오존 발생장치의 경우 선전극이 7개이고 인가전압이 18[kV]일 때 1.134[W]의 전력으로 3.527[ppm/W]의 오존을 발생시켰다.

• Journal of Wetlands Research
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• v.13 no.3
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• pp.697-705
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• 2011

The aim of this study was to examine ozonation disinfection efficiency for Escherichia coli DH5alpha removal, containing the multi-resistance plasmid pB10 as well as chlorination disinfection efficiency. In addition, plasmid pB10 removal rates were estimated by ozonation and chlorination. The removal efficiency of pB10 via ozonation was about 2 to 4 times higher than chlorination. High removal efficiency of pB10 is likely due to OH radical produced during ozonation. These results suggest that integration of advanced oxidation process such as ozonation (or photocatalytic oxidation) with conventional disinfection such as chlorination may be needed for effective control of antibiotic resistant bacteria and genetic materials.

• Environmental engineer
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• s.328
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• pp.92-96
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• 2013

본 발명은 화장실의 세면대에서 사용된 세척수 및 하수를 중수도 수질기준에 적합하도록 처리하여 화장실 용수로 재활용하는 화장실의 중수도 시스템에 관한 것이다. 화장실의 중수도 시스템의 구성을 살펴보면, 세면대에서 사용된 세척수 및 하수가 유입되는 반응조와, 상기 반응조로 유입된 세척수 및 하수를 살균 및 소독하는 마이크로버블 오존 발생장치와, 살균 및 소독된 처리수를 정장하는 처리수조와, 상기 처리수조에 저장된 처리수를 화장실 용수로 공급하는 용수공급펌프를 포함한다. 이 중에서 상기 마이크로버블 오존 발생장치는, 외부에서 유입된 공기를 정화하는 에어필터와, 상기 에어필터에서 정화된 공기를 공급하는 에어펌프와, 상기 에어펌프를 통해 유입된 공기에 자외선을 조사하여 오존을 발생시키는 오존발생기와, 상기 오존발생기에서 발생된 오존을 세척수 및 하수에 혼합시키는 기액혼합펌프와 상기 오존과 상기 세척수 및 상기 하수의 혼합 효과를 극대화하기 위한 라인믹서로 구성된다. 이와 같이 구성된 본 발명에 의한 화장실의 중수도 시스템은 상수(上水)의 소비량을 줄이고 하수(下水)의 발생량을 감소시켜 경비절감의 효과를 얻을 수 있고, 지하수의 고갈 및 생활용수의 증가에 따른 물 부족 현상에 대해 능동적으로 대처할 수 있다. 특히, 재활용된 화장실 용수에는 오존이 함유되어 화장실 내의 악취제거, 살균 및 소독효과가 있으며, 외부로 배출되는 세척수 및 하수에 포함된 유지성분을 제거하여 환경오염을 방지할 수 있다.

• Journal of the Korea Convergence Society
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• v.13 no.3
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• pp.281-289
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• 2022

Plasma ozone is utilized in a variety of applications in the field of sterilization due to its high sterilization performance. Dielectric materials used in DBD(dielectric barrier discharges) are mainly polymer, quartz and ceramics. These dielectric layers have the advantage of limiting the amount of supplied electron charge and allowing plasma to occur evenly on the surface of dielectric. Actually, the target or environment for sterilization is often a complex structure, so research and academic study are needed by utilizing the concept of space sterilization. In this study, the device is applied to generate DBD plasma at atmospheric pressure for disinfection due to the effectiveness in producing radicals and ozone. The generator of plasma ozone is a basic structure of dielectric barrier discharge by placing ceramic tube dielectrics and stainless steel electrical conductors at regular intervals. Various applications can be developed based on the proposed design method. Plasma ozone generation for space sterilization device is recognized as an excellent sterilization device. Through the design and verification of the device, we intend to establish an optimal design of the spatial sterilization device and provide the basis data for sterilization applications.

• Journal of Bio-Environment Control
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• v.23 no.3
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• pp.250-255
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• 2014

Sterilization is an important factor in reprocessing of drained nutrient solution (RDN). To evaluate the suitability of ozone microbubble for RDN in protected horticulture and plant factory, strong fungicidal activity of ozone and microbubble were applied. This experiment was taken advantage of ozonated water (OW) and ozone gas (OG). The Fusarium oxysporum (FO), Phytophthora capsici (PC) and Colletotrichum gloeosporioides (CG) were treated with OW 0.5, 1.0 and 2.0 ppm and OG $3.0g{\cdot}h^{-1}$ for 0, 30, 60, 120 and 180 sec. Results of this experiment can be summed up as follows : In the OW, FO was sterilized by 0.5 ppm in 60 sec and PC was sterilized by 2.0 ppm in 30 sec. In the OG, FO and PC both of them were sterilized in 180 sec. However, CG was not sterilized using OW and OG. Overall, ozone microbubble showed possibility of sterilization in RDN. However, CG is required to more ozone concentration and processing time.

• Proceedings of the KIEE Conference
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• 2006.10a
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• pp.160-161
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• 2006

본 연구는 살균선 및 오존선을 방사하는 저압 자외선램프를 이용하여 한약재 살균 및 장기간의 보관에 따른 변질 원인을 제거하고, 고품질 유지를 위한 것이다. 본 연구에서는 이미 발표한 오존 및 전기적 특성을 연구한 '오존램프를 이용한 약재 보관 특성(1)'에 이어서, 주로 약재 보관 특성의 관점에서 연구를 하였다. 대구 약전골목에서 현재 가장 많이 사용되고 유통되고 있는 작약, 백출, 왕기, 감초, 당귀를 실험에 이용 하였으며, 오존램프 보관 유무에 따른 약재의 외관상의 변화, 일반성분의 변화, 생리활성 물질의 변화 등 특성 평가를 연구하였다.

• Food Engineering Progress
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• v.14 no.4
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• pp.316-321
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• 2010

The efficacy of the ozonated water (0.1, 0.2, 0.4, 0.6, and 1.0 ppm) in reducing the risk of food-borne disease was investigated in this study. After inoculation of Listeria monocytogenes (ATCC 19112), Salmonella enterica subsp. enterica biovar Typhimurium (ATCC 12598), Escherichia coli O157:H7 (ATCC 43890) to lettuce, spinach, and beef, inhibition effect with different washing concentrations, time, and methods with ozonated and tap water were evaluated. As a result, there were 2.16 to 3.85 log CFU/mL reduction in different foods and 7 log CFU/mL reduction on cutting boards after watering with ozonated water. Higher than 0.2 ppm of ozonated water treatment reduced the growth of food-borne disease bacteria with increasing washing time and ozone concentration. These results suggested that the ozonated water treatment effectively improved the microbiological quality and food safety.

• Applied Chemistry for Engineering
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• v.22 no.3
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• pp.261-265
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• 2011

The sterilization effects of atmospheric pressure plasma with the mixture of argon and oxygen were analyzed. The plasma reactor with the shape of dielectric barrier discharge produced the uniform distribution of glow discharge and generated ozone gas effectively according to the various process parameters. The sterilization for E. coli was affected by power, oxygen ratio in the mixture gas, treatment time and distance between reactor and sample. The concentration of ozone was a major source for the sterilization of E. coli, which was enhanced by the increase of power and oxygen ratio. In this study, the effect of atmospheric pressure plasma treatment for the sterilization was confirmed and its result can deliver the atmospheric pressure plasma treatment as the novel sterilization method instead of conventional methods.

• Proceedings of the KIEE Conference
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• 2006.07c
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• pp.1533-1534
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• 2006

본 연구는 한약재 살균 및 장기간의 저장에 따른 한약재 변질 원인을 제거하고, 고품질 유지를 위한 새로운 저장 장치를 개발하고자 하는 것이다. 본 연구에서는 '살균선 및 오존선을 방사하는 저압 자외선 램프'(이하, OZ-Lamp)의 방사 특징을 이용한 약재 보관장치를 제작하여, 오존발생 및 전기적 특성 연구 및 오존처리 보관 유무에 따른 약재의 특성 평가를 병행 연구하였다.

• Korean Journal of Food Science and Technology
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• v.39 no.4
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• pp.419-424
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• 2007

The optimum sanitization conditions for fresh red pepper were acquired with hot water, ozone water, hydrogen peroxide and sodium hypochlorite. At this condition, the sanitized red pepper was frozen at $-70^{\circ}C$, stored at $-30^{\circ}C$ for 30 days and then changes of quality in each treatment were measured. Escherichia coli and coliform group were found to be negative with the conditions of 4 min hot water treatment at $95^{\circ}C$, 6 min ozone water (0.5 ppm) treatment, 12 min sanitization for 2%-hydrogen peroxide and of 4 min 3%-sodium hypochlorite treatment. Drip loss was generated highest at the hot water treatment to be 15%. The content of ascorbic acid was less than 40% of the control at all treatments except ozone water treatment. The content of cartenoids was 124.16-182.87 mg% at ozone water treatment which was found to be the least loss. The sensory evaluation showed that most treatments except ozone water treatment were significantly different to the control (p < 0.05). Therefore, ozone treatment was evaluated to be the best method for producing the sanitized fresh red pepper.