Virus Inactivating Effect of Anaerobic Mesophilic Digestion of Municipal Sludge with or without Different Preceding Types of Treatment
- 1 October 1985
- journal article
- Published by IWA Publishing in Water Science & Technology
- Vol. 17 (10) , 175-184
- https://doi.org/10.2166/wst.1985.0108
Abstract
The effect of the conventional mesophilic anaerobic one-step digestion, and of two-phase processes with and without pre-pasteurisation and pasteurisation of the digested sludge on three non-enveloped viruses was investigated. Reovirus Type 1 and bovine Enterovirus (ECBO-LCR-4) were inactivated completely by the one-step mesophilic anaerobic digestion process with a mean hydraulic retention time (MHRT) of 20 days, as well as by the two-phase process with a MHRT of two days in the anaerobic pretreatment at 33°C or 20°C and eight days in the main digestion at 33°C, with and without prepasteurisation. None of the processes inactivated bovine Parvovirus (strain Haden) completely. Even by pasteurisation of the digested sludge this virus could not be inactivated in all cases.Keywords
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