Evaluation of Odor Characteristics of Heat-Dried Biosolids Product

Because it produces an exceptional quality pellet product, heat drying of wastewater solids from municipal wastewater treatment plants is becoming more prevalent as biosolids management regulations become more restrictive. The product from heat drying is sometimes odorous as dry or wetted pellets. T...

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Bibliographic Details
Published in:Water environment research 2003-11, Vol.75 (6), p.523-531
Main Authors: Murthy, Sudhir, Kim, Hyunook, Peot, Christopher, McConnell, Laura, Strawn, Mary, Sadick, Thomas, Dolak, Ivan
Format: Article
Language:English
Subjects:
Activated sludge
Applied sciences
Atmospheric pollution
BIOSOLIDS
Calcium Compounds
Dispersed sources and other
Disulfides
Drying
Exact sciences and technology
Fatty acids
HEAT DRYING
Hot Temperature
Odorants - analysis
ODORS
Other industrial wastes. Sewage sludge
Oxides
PELLETS
Pollution
Pollution sources. Measurement results
Research Papers
Sewage - analysis
Short chain fatty acids
Sludge digestion
Soil amendments
Soil water
Sulfides
Waste Disposal, Fluid
Wastes
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Summary:Because it produces an exceptional quality pellet product, heat drying of wastewater solids from municipal wastewater treatment plants is becoming more prevalent as biosolids management regulations become more restrictive. The product from heat drying is sometimes odorous as dry or wetted pellets. The odors, although not regulated, can be important for marketability and public acceptance of the product. The reasons for the odors are usually a result of upstream processing and management of wastewater solids prior to drying. The goals of this study were to determine odor characteristics and to compare the odors produced by evaluating odors from four types of heat-dried biosolids products: all undigested; primary digested-waste activated sludge (WAS) undigested; all digested; and WAS lime stabilized pellets. The results are described in this paper.
ISSN:1061-4303
1554-7531
DOI:10.2175/106143003X141312