Performance Evaluation of Nano-bubble System with Electro-oxidation process for Bio-aerosol Reduction

Yeo, In‐Sung; Yoo, Keunje; Park, Chan-Gyu

doi:10.5762/kais.2022.23.8.293

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“…또한, 표면 전하 증가와 기체가 파열되는 순간 높은 에너지 및 라디칼이 생성되어 이러한 버블의 자연적 폭발(bursting), 결합(coalescence)과 수축(contraction)에 의한 인위적 폭발 및 표면 전하를 이용한 충격, 자체 파괴 등에 의한 소독 메커니즘 등이 규명되고 있어 수질정화, 세정, 살균 설비 등 다양한 응용 분야에 적용되어 연구되고 있다 [7][8][9][10][11][12]. 본 연구에서는 나노 버블이 갖고 있는 잠재 에너지를 활용하고 버블의 안정성 향상을 위해 버블 표면의 음이온 집약을 위한 전기화학적 공정이 적용된 나노 버블 생성장치를 제작하였으며 [13], 바이오에어로졸의 저감을 위해 스크러버 방식의 나노 버블 습식 공기정화장치를 제작, 연계한 일체형 통합시스템을 구축하여 바이오에어로졸 내 미생물의 저감 성능평가 및 최적화 운영 조건 도출 선정을 위한 연구를 수행하였다.…”

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Study on Development of Bio-aerosol Reduction System using Electrochemical Nano-bubble Technology

Yeo¹,

Park²

2023

APJCRI

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Bioaerosol refers to a state in which biological factors are dispersed as fine particles in a gaseous environment. It has been reported that it not only pollutes indoor air quality but is also included in outdoor atmospheric aerosols, affecting the spread of contagious diseases. Therefore, it is necessary to develop technologies to effectively detect and reduce it. In this study, a nanobubble generating system was developed using the potential energy of nanobubbles and applying an electrochemical process using DSA electrodes for concentrating negative ions on the surface to increase the residence time by improving the stability of nanobubbles. In addition, an air purification system for reducing bioaerosols was developed, and the reduction trend was confirmed through the analysis of ATP activity of Staphylococcus epidermidis, and performance evaluation were performed to optimize operating conditions through airborne microorganism and airborne virus reduction chamber tests. The nanobubble generator was operated under the optimal operating conditions derived from previous research. Experiment were conducted to select the contact method of nanobubbles and bioaerosol in the air purification system, the amount of air flow, and the input amount of feed water. As a result of the experiments, the reduction efficiency trends were changed according to the level of nano-bubble water in the air purification system reaction tank and the amount of air flow. It was confirmed that the method of directly contacting the bioaerosol to the nanobubbles was efficiently reduced compared to the method of spraying the nanobubbles. Finally, the experiment was carried out by spraying and direct contact mixing, and the optimal operating conditions were selected as nanobubble nozzle spraying amount of 10 L/min, blowing amount of 2.25 m 3 /min, and supply water amount of 40 L. When operating the system for 10 minutes, Staphylococcus epidermidis showed a reduction efficiency of about 99% or more, showing the highest reduction tendency. In addition, as a result of the reduction efficiency test of airborne microorganisms and airborne viruses through chamber accreditation tests, it was confirmed that each was reduced by more than 99.9%, and bioaerosols were effectively reduced through the device developed in this study.

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Study on Development of Bio-aerosol Reduction System using Electrochemical Nano-bubble Technology

Yeo¹,

Park²

2023

APJCRI

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Performance Evaluation of Nano-bubble System with Electro-oxidation process for Bio-aerosol Reduction

Cited by 1 publication

References 0 publications

Study on Development of Bio-aerosol Reduction System using Electrochemical Nano-bubble Technology

Study on Development of Bio-aerosol Reduction System using Electrochemical Nano-bubble Technology

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