Recent developments in the Sandia Laboratories' sewage sludge irradiation program [report]

H.D. Sivinski, J.R. Brandon, M.E. Morris, K.S. Neuhauser, R.L. Ward, B. McCaslin, G.S. Smith
1977 unpublished
Pathogen reduction studies have shown that a l Mrad treatment (or less at elevated temperatures) is very effective in eliminating pathogenic bacteria and viable parasite ova in liquid sludges. Heat is effective in reducing levels not only of pathogenic bacteria and Ascaris ova, but viruses as well. Ammonia has been shown to be virucidal to poliovirus and several other enteric viruses. Sludge processing costs are seen to be marginally competitive with heat treatment for liquid sludges and
more » ... sludges and relatively economical for composted or dried sludges. Physical/chemical effects studies have shown that the effects of irradiation of sludges on dewatering properties are not significant when compared to polymers, nor is the combined effect synergistic. Dried, irradiated undigested sludge has been shown to be of significant nutritional value when used as a feed supplement for sheep and cattle, as well as in agronomic uses. No significant harmful effects have been demonstL·Cited in the feeding program thus far. Product enhancement studies are currently under way, including schemes for removing nitrogen from effluent streams for addition c:t.s ammonium salts to sludges.
doi:10.2172/5324610 fatcat:5attt7mo5bgpzkrnkh745y4ij4