Microorganism Contamination of HVAC Humidification Systems: Case Study
| Autor: | Joseph E. Burkhart, Brian Kovak, Rebecca S. Stanevich |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Waste management
biology business.industry Microorganism Public Health Environmental and Occupational Health Steam injection Heterotrophic bacteria Contamination biology.organism_classification humanities law.invention Air conditioning law HVAC Ventilation (architecture) Environmental science business Bacteria |
| Zdroj: | Applied Occupational and Environmental Hygiene. 8:1010-1014 |
| ISSN: | 1521-0898 1047-322X |
| DOI: | 10.1080/1047322x.1993.10388242 |
| Popis: | Water samples were collected from 33 of the 54 heating, ventilation, and air conditioning (HVAC) humidification system water reservoir pans in a large office building. Two different forms of humidification are used in this building: air washers and steam injection. Thirty-eight samples were cultured for human-source and heterotrophic bacteria, thermophilic organisms, and fungi. While one microbe, an unidentified bacterium, was found on more plates than any other organism, Streptococcus and Pseudomonas were found to be the most predominant microorganisms. In a comparison of the air wash and steam injection humidification systems, only small quantities of bacteria were found in the steam systems, while water collected from the air wash systems was highly contaminated. Data were also available to test the effectiveness of the cleaning system. A sample collected one day before cleaning had 58,100 colony forming units per milliliter (CFU/ml). Samples collected 1 and 2 days after cleaning had 250,200 a... |
| Databáze: | OpenAIRE |
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