Development and evaluation of a plant-based air filter system for bacterial growth control

Title
Development and evaluation of a plant-based air filter system for bacterial growth control
Authors
Yong-Keun ChoiSeongmin LeeHyeon Jin JeonHeehoon JungHyung Sup KimKil Koang KwonSu Mi Kim송경근Im Soon LeeByung Uk LeeHyung Joo Kim
Keywords
Plant-based biofilter; Cupressus macrocarpa; Bacillus subtilis; Staphylococcus aureus; α-pinene; β- pinene
Issue Date
2013-04
Publisher
African Journal of Biotechnology
Citation
VOL 12, NO 16, 2027-2033
Abstract
We investigated a novel plant-based air filter system for bacterial growth control. The volatile components released from the experimental plant (Cupressus macrocarpa) were used as the basis of the bacterial growth control and inhibition. We monitored the effect of light on the gas exhausted from the system, and we found that the presence of light induced an increase in the O2 concentration and a decrease in the CO2 concentration in the exhaust gas. A variety of Gram-positive and -negative bacteria was used to elucidate the effect of the exhaust gas on bacterial growth. In the Bacillus subtilis cultivation aerated with the exhaust gas (batch mode), we observed a decrease in the specific growth rate (μ = 0.227 h-1) compared with the control experiments (0.257 h-1). The same result was observed for the Staphylococcus aureus cultivation aerated with the exhaust gas. In the case of Gram-negative bacterial cultivation aerated with the gas, no significant inhibitory effect of the exhaust gas on the bacterial growth was observed. When the number of bacteria (B. subtilis) in a continuous culture was varied at different aeration rates (between 50 to 200 mL/min) using the exhaust gas, a prominent inhibitory effect was observed. Preliminary gas analysis showed that the major inhibitory factors in the exhaust gas are α- and β-pinene and linalool. The results show that the air filter system used in this study could be applied not only as a methodological aspect for estimating antibacterial activity but also for bacteria control in a given system.
URI
http://pubs.kist.re.kr/handle/201004/44777
ISSN
16845315
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KIST Publication > Article
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