Gamma Irradiation of Municipal Sludge for Safe Disposal and Agricultural Use

Gamma radiation was found to be an effective tool for hygienization of municipal wastewater sludge. The sludge received from the primary settling tank of a municipal wastewater treatment plant was gamma irradiated using a cobalt-60 source in a sludge hygienization research irradiator. The process pa...

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Bibliographic Details
Published in:Water environment research 2005-09, Vol.77 (5), p.472-479
Main Authors: Gautam, Satyendra, Shah, Mahesh R., Sabharwal, Sunil, Sharma, Arun
Format: Article
Language:English
Subjects:
Activated sludge
Agriculture - methods
Applied sciences
Arachis - growth & development
Arachis - microbiology
biofertilizer
coliforms
Escherichia coli - isolation & purification
Escherichia coli - radiation effects
Exact sciences and technology
Fecal coliforms
Fertilizers
gamma irradiation
Gamma Rays
hygienization
Irradiation
Liquids
Other industrial wastes. Sewage sludge
Pollution
Radiation
Research Papers
Rhizobium
Rhizobium leguminosarum - growth & development
Sewage - chemistry
Sewage sludge
Sludge
Sludge treatment
Waste Disposal, Fluid - methods
Waste Disposal, Fluid - standards
Wastes
Wastewater
Wastewater treatment
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Summary:Gamma radiation was found to be an effective tool for hygienization of municipal wastewater sludge. The sludge received from the primary settling tank of a municipal wastewater treatment plant was gamma irradiated using a cobalt-60 source in a sludge hygienization research irradiator. The process parameters were adjusted to effectively eliminate coliform bacteria in the sludge and to prevent their regrowth. Irradiated sludge was found to be free of fecal coliform and could be directly disposed after drying in a landfill or used as manure. It could also be used as a medium for growth of Rhizobium sp for obtaining a bio-fertilizer.
ISSN:1061-4303
1554-7531
DOI:10.2175/106143005X67386