Potential pathogens in waste products of biogas plants processing livestock manure
|No. of pages||23|
Biogas stations present currently an important part of agricultural production management. While the main feedstock for anaerobic digestion is corn and grass silage, they can be fed also with bio-waste materials, such as cattle, swine or poultry manure. Fugate, the waste product of biogas production, is regularly used in agriculture as fertiliser, but can contain bacterial pathogens commonly related to animal husbandry. The aim of the study was (i) to compare different types of manure with regard to the content of selected zoonotic agents after anaerobic digestion and (ii) examine the effect of a stage of treating fugate after anaerobic digestion. The numbers of coliform bacteria, Salmonella spp., Clostridium perfringens, Campylobacter spp. and total anaerobes were investigated by cultivation in fugate samples and evaluated as log CFU/g of a dry matter. The study should help improve the hygiene of agricultural production and raises awareness of zoonotic infections originating from animal husbandry.
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