Summary
Quantitative information upon the destruction of eggs of Ascaris spp. and Taenia saginata by thermal disinfection and during stabilisation of sludge has been examined to determine those processes which significantly reduce viability or infectivity by at least 90% or reduce them to undetectable levels. Where possible specific decay rates have been calculated and used to compare the efficacies of processes operated either batchwise or with continuous or discontinuous feeding of sludge. At temperatures above 50 °C, eggs of T. saginata are more resistant than those of Ascaris spp. and complete destruction requires treatment in excess of 60 °C for 3h, as in pasteurisation, treatment with quicklime or in bioreactor composting. Significant reductions in the infectivity of T. saginata ova for calves are given by anaerobic mesophilic and accelerated cold digestion, by lagooning for 28d, treatment at 52–60 °C for 3h and by thermophilic oxidative digestion at 47 °C for 6d. Lime treatment at pHl2 will significantly reduce infectivity of T. saginata but will require at least 7d to reduce Ascaris viability significantly.
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© 1986 ECSC, EEC, EAEC, Brussels and Luxembourg
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Pike, E.B., Carrington, E.G. (1986). Inactivation of Parasitic Ova during Disinfection and Stabilisation of Sludge. In: L’Hermite, P. (eds) Processing and Use of Organic Sludge and Liquid Agricultural Wastes. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4756-6_12
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DOI: https://doi.org/10.1007/978-94-009-4756-6_12
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