LiCl溶液对4种空调典型霉菌、细菌的抑制研究

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Abstract To prevent the excessive growth of molds and bacteria in the air-conditioning system (ACs), the inhibiting effects on common molds and bacteria in ACs of LiCl aqueous solution, a widely-used liquid desiccant in the ACs, were investigated in detail with the disk diffusion method. The four typical molds and bacteria, i.e., Aspergillus niger (A. niger), Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Bacillus subtilis (B. subtilis), were selected for the study. LiCl solution was found to show significant inhibiting effects on the four microbes under the usual concentration range (35%~40%) for air dehumidification. In particular, the most potent effect was on the A. niger, on which significant inhibiting effects were observed with the desiccant solution at a low concentration (merely 15%), followed by the gram-negative bacteria E. coli. In contrast, inhibiting effects on S. aureus and B. subtilis, the gram-positive bacteria, were relatively weaker. Furthermore, a positive correlation was found between the LiCl solution’s concentration and the diameter of inhibition zones of A. niger and E. coli, which indicated stronger inhibiting effects with the rising concentration of the LiCl solution.

Key words： liquid desiccant air-conditioning system disk diffusion tests mold bacteria inhibitation

Received: 06 January 2020

PACS:	X172
	TU834

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	GU Yu-qian
	YANG Zi-li
	CAO Rong
	ZHONG Ke
	CHEN Bin

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GU Yu-qian,YANG Zi-li,CAO Rong等. Inhibiting effects of LiCl aqueous solution on four typical molds and bacteria in the air-conditioning system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(8): 3636-3643.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I8/3636

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