摘要
为防止空调系统内霉菌、细菌的过度孳生,本文以空调系统内常见的黑曲霉(A.niger)、大肠埃希氏菌(E.coli)、金黄色葡萄球菌(S.aureus)、枯草芽孢杆菌(B.subtilis)为典型霉菌、细菌,基于纸片扩散法药敏试验,研究了空调除湿常用工质LiCl溶液对上述典型菌种的抑制作用及浓度影响规律.结果表明:在常见除湿浓度范围(35%~40%)内,LiCl溶液对上述4种典型菌种均有抑制作用;特别是对A.niger抑制效果最强,在15%的低浓度下即可产生明显抑制;其次为E.coli,而对S.aureus和B.subtilis的抑制相对较弱.此外,所得抑制效果随LiCl溶液浓度的提高而明显增强,特别是对A.niger和E.coli,溶液浓度与抑菌圈直径呈显著的正相关性.
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.
作者
谷雨倩
杨自力
曹蓉
钟珂
陈彬
GU Yu-qian;YANG Zi-li;CAO Rong;ZHONG Ke;CHEN Bin(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Department of Radiology,Shanghai General Hospital,Shanghai Jiao Tong University,Shanghai 201620,China;Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2020年第8期3636-3643,共8页
China Environmental Science
基金
上海市青年科技英才扬帆计划(19YF1401800)
国家自然科学基金资助项目(51578121)
中央高校基本科研业务费专项资金(2232018D3-36)
中国博士后基金(2018M630385).
关键词
除湿溶液
空调系统
纸片扩散法
霉菌
细菌
抑制
liquid desiccant
air-conditioning system
disk diffusion tests
mold
bacteria
inhibitation
