建筑淋浴软管中微生物再生与致病风险研究  

Microbial Re-growth and Disease Risk in Building Shower Hoses

作　　者：秦雯 李布林 洪苗青 肖任远 黄道纳 刘立凡[1] 王志红[1] QINWen;LI Bu-lin;HONG Miao-qing;XIAO Ren-yuan;HUANG Dao-na;LIU Li-fan;WANG Zhi-hong(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006

出　　处：《中国给水排水》2023年第7期69-75,共7页China Water & Wastewater

基　　金：国家自然科学基金青年基金资助项目(52000037);广州市基础与应用基础研究项目(202201010208);广东省基础与应用基础研究基金资助项目(2022A1515011757、2021A1515012062)。

摘　　要：为探究淋浴软管中微生物再生所带来的潜在致病风险,针对细菌总数和机会病原体(O157大肠杆菌和总大肠杆菌),研究了淋浴软管内壁微生物再生情况、淋浴产生气溶胶中微生物特征以及软管内壁细菌总数和淋浴水质的相关性。结果表明:不同材质和不同使用年限的淋浴软管内壁均存在细菌再生和机会病原体出现的现象,且软管中细菌总数的分布规律为出水处>中部>进水处;淋浴过程软管中机会病原体通过气溶胶释放,气溶胶中细菌总数与淋浴软管内壁细菌总数呈正相关关系(进水处、中部、出水处的R2分别为0.992、0.885和0.886);采用PVC软管,淋浴间内距离地面高度为0.7 m处气溶胶中细菌总数是高度为1.6 m处的1.6倍;可同化有机碳(AOC)和氨氮是影响淋浴软管中细菌滋生的限制性因素,淋浴软管细菌总数与AOC及氨氮浓度呈正相关关系(进水处、中部、出水处前者的R^(2)分别为0.988、0.968和0.993,后者的R2分别为0.999、0.921和0.950)。To explore the potential disease risks caused by microbial re-growth in shower hoses,according to the total number of bacteria and opportunistic pathogens(O157 Escherichia coli and total coliforms),this paper investigated the re-growth of microbial in the inner wall of shower hoses,the microbial characteristics in aerosols and the correlation between biomass in shower hoses and the shower water quality.Bacterial re-growth and opportunistic pathogens appeared in the inner wall of shower hoses with different materials and service life,and the total number of bacteria distributed in hoses in descending order was outlet,middle and inlet.The opportunistic pathogens in hoses were released through aerosols during the shower,and the total number of bacteria in aerosols was positively correlated with it in the inner wall of shower hoses(R~2 at inlet,middle and outlet were 0.992,0.885 and 0.886 respectively).With PVC hose,when the height of 0.7 m from the ground in the shower room,the total number of bacteria in aerosols was 1.6 times of that when the height was 1.6 m.Assimilable organic carbon(AOC)and ammonia nitrogen were the limiting factors affecting the bacterial growth in shower hoses,and the total number of bacteria in shower hoses was positively correlated with the concentration of AOC and ammonia nitrogen(R^(2) of the former at inlet,middle and outlet were 0.988,0.968 and 0.993 respectively;R^(2) of the latter were 0.999,0.921 and 0.950 respectively).

关 键 词：淋浴软管 微生物再生 细菌总数 机会病原体 气溶胶 

分 类 号：TU992[建筑科学—市政工程]