Effect of radiation on certain animal viruses in liquid swine manure

Simon, József; Mocsári, E; Gleria, M. di; Felkai, Vilmos

doi:10.1016/0020-708x(83)90092-3

Cited by 3 publications

(1 citation statement)

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“…We found that the parvovirus appeared to be more resistant than the enterovirus to inactivation by gamma irradiation, since it survived an irradiation dose of 1-0 Mrad. This finding is in general accord with the conclusions of others that doses of gamma irradiation of 3-0 Mrad (Simon et al 1983) or 4-0 Mrad (Thomas, Ouwerkerk & McKercher, 1982 are necessary for the safe disinfection of animal viruses in effluents. We did not study higher doses of irradiation because the capital and operating costs ofan appropriate on-farm facility for gamma irradiation would be high relative to the costs of the other processes which we have investigated.…”

Section: Discussionsupporting

confidence: 91%

The inactivation of a bovine enterovirus and a bovine parvovirus in cattle manure by anaerobic digestion, heat treatment, gamma irradiation, ensilage and composting

Monteith¹,

Shannon²,

Derbyshire

1986

J. Hyg.

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A bovine enterovirus and a bovine parvovirus seeded into liquid cattle manure were rapidly inactivated by anaerobic digestion under thermophilic conditions (55 degrees C), but the same viruses survived for up to 13 and 8 days respectively under mesophilic conditions (35 degrees C). The enterovirus was inactivated in digested liquid manure heated to 70 degrees C for 30 min, but the parvovirus was not inactivated by this treatment. The enterovirus, seeded into single cell protein (the solids recovered by centrifugation of digested liquid manure), was inactivated by a gamma irradiation dose of 1.0 Mrad, but the parvovirus survived this dose. When single cell protein seeded with bovine enterovirus or bovine parvovirus was ensiled with cracked corn, the enterovirus was inactivated after a period of 30 days, while the parvovirus survived for 30 days in one of two experiments. Neither the enterovirus nor the parvovirus survived composting for 28 days in a thermophilic aerobic environment when seeded into the solid fraction of cattle manure. It was concluded that, of the procedures tested, only anaerobic digestion under thermophilic conditions appeared to be reliable method of viral inactivation to ensure the safety of single cell protein for refeeding to livestock. Composting appeared to be a suitable method for the disinfection of manure for use as a soil conditioner.

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Section: Discussionsupporting

confidence: 91%