Journal article
Indoor and Outdoor Air Quality Assessment of Four Wastewater Treatment Plants
Journal of Occupational and Environmental Hygiene, Vol.3(1), pp.36-43
2006
DOI: 10.1080/15459620500455380
Abstract
The air quality of four wastewater treatment plants (WWTPs) by monitoring levels of hydrogen sulfide and endotoxin was assessed. The unit operations at each WWTP were categorized as: grit removal, primary clarification, biological treatment, secondary clarification, sludge dewatering, and digestion. Temperature and relative humidity were monitored over the sampling period using a direct reading instrument. A mixed-model ANCOVA for repeated measurements was used to investigate whether specific unit operations produced higher contaminant concentrations than others. The correlations between factors were analyzed with Pearson correlation coefficients. It was found that the geometric means (GMs) of the hydrogen sulfide levels at twenty two unit operations in the four plants were less than 1 ppm, whereas endotoxin showed a very broad range of GMs among the unit operations, ranging from 6-1248 EU/m super(3).
Details
- Title: Subtitle
- Indoor and Outdoor Air Quality Assessment of Four Wastewater Treatment Plants
- Creators
- Joung Ae Lee - University of IowaJohn C. JohnsonStephen J. ReynoldsPeter S. Thorne - University of IowaPatrick T. O'Shaughnessy - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of Occupational and Environmental Hygiene, Vol.3(1), pp.36-43
- DOI
- 10.1080/15459620500455380
- ISSN
- 1545-9624
- eISSN
- 1545-9632
- Language
- English
- Date published
- 2006
- Academic Unit
- Occupational and Environmental Health; Civil and Environmental Engineering
- Record Identifier
- 9983557690802771
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