QINWen,LIBu-lin,HONGMiao-qing,et al.Microbial Re?growth and Disease Risk in Building Shower Hoses[J].China Water & Wastewater,2023,39(7):69-75.
Microbial Re?growth and Disease Risk in Building Shower Hoses
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第7期
Page:
69-75
Column:
Date of publication:
2023-04-01
- Keywords:
- shower hose; microbial re-growth; the total number of bacteria; opportunistic pathogen; aerosol
- Abstract:
- 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 (R2 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 (R2 of the former at inlet, middle and outlet were 0.988, 0.968 and 0.993 respectively; R2 of the latter were 0.999, 0.921 and 0.950 respectively).
Last Update:
2023-04-01