Sterilization of Water-Based Cutting Fluids Using Compact Air-Cooled Coaxial Dielectric Barrier Discharge Reactor with Bubbler

Author:

Chun Se Min12ORCID,Ahn Geum Ran1ORCID,Yang Geon Woo13ORCID,Lee Hee Jae12ORCID,Hong Yong Cheol14ORCID

Affiliation:

1. Institute of Plasma Technology, Korea Institute of Fusion Energy (KFE), 37 Dongjansan-ro, Gunsan 54004, Republic of Korea

2. Department of Applied Plasma & Quantum Beam Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju 54896, Republic of Korea

3. Department of Bio-Nano System Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju 54896, Republic of Korea

4. KFE-School, University of Science and Technology (UST), 217, Gajeong-ro, Yuseong-gu, Deajeon 34113, Republic of Korea

Abstract

Odor and discoloration in water-based cutting fluids are caused by the growth of microorganisms and putrefying bacteria. This significantly reduces cutting performance, prevents rust, and deteriorates the working environment. To overcome these drawbacks, we developed a compact air-cooled coaxial dielectric barrier discharge (DBD) with a bubbler. Bacteria and microorganisms living in waste cutting fluids were sterilized by the high concentration of ozone produced under the optimized conditions of the compact air-cooled coaxial DBD. Moreover, it was confirmed that 99.99% of bacteria and microorganisms were completely removed. Ozone was found to not affect property changes such as the composition, concentration, and pH of the water-based cutting fluids. The chromaticity and complex odor of waste cutting liquids were thus found to have been improved by the effects of microorganism and bacterial sterilization. We conclude that the proposed a compact air-cooled coaxial DBD with a bubbler is an efficient method for sterilizing water-based cutting fluids.

Funder

Government funds

Korea Ministry of Environment

Korean government

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

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