Air Quality of Ventilation Systems of Centralized Air-Conditioners in Star Grade Hotels in Nanning
- VernacularTitle:南宁市星级宾馆集中空调通风系统卫生学调查
- Author:
Shaoyun CHEN
;
Yuqiao QIN
;
Linfeng HE
- Publication Type:Journal Article
- Keywords:
Air pollution, indoor;
Ventilation systems of centralized air-conditioners;
Health survey
- From:
Journal of Environment and Health
1993;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the pollution situation of ventilation systems of centralized air-conditioners in public areas and to present the data for hygiene management. Methods 20 ventilating systems of air-conditioners from six 3-star or above hotels in Nanning were selected randomly and the hygienic inspection on these samples was performed including the indexes of PM10, aerobic bacterial count, aerobic molds count, dust capacity of inner-wind duct surface and microbial as well as the legionella in cooling tower water. Results The total count of aerobic bacterial in breeze of air-conditioner was rather serious, the over-standard rate was 66.7%. The over-standard rate of PM10 was 16.7%. Dust content of inner-wind duct surface was rather high with the average value of 46.33 g/m2 and the over-standard rate was 83.3%, the over-standard rate of total count of aerobic molds in it was 100%, the highest value was 145.3 times of the standard limit. The over-standard rate of total bacterial count in inner-wind duct surface was 16.7%. The legionella pneumophila was detected in one of the six samples. Conclusion The cleaning and disinfection of ventilation system of centralized air-conditioners in star grade hotels is not thorough in Nanning and the pollution of microbial is rather serious. so the hygienic management must be strengthened.
