forced aeration system for composting wastewater sludge

Studies were conducted on composting wastewater sludge to prevent offensive odors. A forced aeration system was developed for composting anaerobically digested, mixed raw (primary and activated secondary undigested), and digested sludge. Because temperatures in the aerated pile were higher than thos...

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Bibliographic Details
Published in:Journal - Water Pollution Control Federation 1976-01, Vol.48 (4), p.688-694
Main Authors: Epstein, E, Willson, G.B, Burge, W.D, Mullen, D.C, Enkiri, N.K
Format: Article
Language:English
Subjects:
Compost
Composting
environmental science
Fecal coliforms
natural resource management
Odors
pollution
Salmonella
Sludge
Sludge digestion
Sludge treatment
Wastewater
Windrow composting
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Summary:Studies were conducted on composting wastewater sludge to prevent offensive odors. A forced aeration system was developed for composting anaerobically digested, mixed raw (primary and activated secondary undigested), and digested sludge. Because temperatures in the aerated pile were higher than those in a windrow composting system, there was more extensive elimination of total coliforms, fecal coliforms, and salmonellae. Thermophilic temperatures above 40°C and often exceeding 70°C were maintained for 14 to 26 days. Oxygen levels for composting in the pile were in the range of 10 to 15 percent. The odoriferous gases were drawn from the pile by suction and deodorized by passing through a pile of screened compost.
ISSN:0043-1303
2327-7467