Title Chicken manure and cow slurry co-digestion with pig fat waste: a comparative analysis of biogas production parameters /
Authors Buivydas, Egidijus ; Žalys, Bronius ; Navickas, Kęstutis ; Venslauskas, Kęstutis ; Župerka, Vidmantas ; Rubežius, Mantas
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Is Part of CYSENI 2023 19th International Conference of Young scientists on energy and natural sciences issues 23-26 May 2023 , Kaunas, Lithuania.. Kaunas : Lietuvos energetikos institutas. 2023, p. 18.. ISSN 2783-6339
Abstract [eng] The food production chain, from livestock and poultry farming to the meat processing industry, constantly increases the amount of offal and waste. Almost every participant in this chain encounters a problem utilising all the waste it produces. A big challenge in solving that problem is to get rid of fat waste, which is part of FOG (fats, oils, and greases) waste because such matters slowly degrade and can be utilised by few technologies. In our research, we applied an anaerobic digestion process to solve the fat waste utilisation problem and investigated how such waste treatment impacts biogas production. The study has been conducted on the anaerobic digestion of cow slurry and poultry manure using pig fat as the manure-based substrate supplement. Anaerobic digestion opportunities and challenges associated with manure-based substrates and fat waste as a supplement were identified and compared by comparative analysis of factors: the biogas yield from organic matter, the biogas calorific value, volatile solids reduction efficiency and energy balance. The research showed that pig fat waste co-digestion with chicken manure and cow slurry increased biogas yield, methane concentration in biogas, biogas calorific value and biomass energy yield in both cases. The increase of biogas yield was higher in fat co-digestion with chicken manure than with cow slurry at every organic load rate (OLR). The biogas production was the highest at OLR 4,5 kgVS/m3 ·d. At this OLR, the biogas yield increased 2.09 times for chicken manure and 3.15 times for cow slurry. Meanwhile, the increase in feeding material was 5.26 per cent for chicken manure and 2.91 per cent for cow slurry. Fat waste utilisation through anaerobic co-digestion with manure-based substrates has a positive influence on biogas production parameters and could be an appropriate measure for solving the problem of fat waste utilisation for the food processing industry.
Published Kaunas : Lietuvos energetikos institutas
Type Conference paper
Language English
Publication date 2023