• DOI:10.1007/s13399-020-00833-8
• Corpus ID: 225685739

Biogas production from co-digestion of different proportions of food waste and fresh bovine manure

@article{deMoraisAndrade2020BiogasPF,
  title={Biogas production from co-digestion of different proportions of food waste and fresh bovine manure},
  author={Monaliza Mirella de Morais Andrade and B{\'a}rbara Ribeiro Alves Alencar and Nathalia Pereira Leite and Alessandra Lee Barbosa Firmo and Emmanuel Damilano Dutra and Everardo Valadares de S{\'a} Barretto Sampaio and R{\^o}mulo Sim{\~o}es Cezar Menezes},
  journal={Biomass Conversion and Biorefinery},
  year={2020},
  pages={1-8}
}

• Monaliza Mirella de Morais Andrade, B. R. A. Alencar, +4 authors R. Menezes
• Published 29 June 2020
• Chemistry
• Biomass Conversion and Biorefinery

The present study aimed to evaluate the process of anaerobic co-digestion of different proportions of food waste and fresh bovine manure. The experiments were carried out in the laboratory (using 250-mL reactors) and in a pilot-scale biodigester (8 m3). The laboratory experiment was conducted with batch feed systems testing three food waste (FW) and bovine manure (BM) ratios: 0:1, 1:2, and 3:1 (equivalent to 0, 33, and 75 % of food waste in the digester substrate, respectively). The pilot-scale biodigester had a continuous feed system and received a 1:2 FW:BM mixture ratio. The highest accumulated biogas production in the laboratory was 273 mL g-1 of volatile solids (VS) in the treatment with the 1:2 FW:BM ratio. Concentrations of volatile fatty acids (VFA) greater than 8 g L-1 inhibited methane production, except in the treatment without food waste. In the pilot-scale biodigester, concentrations of VFA were below the inhibitory threshold, and the biogas and methane yields were 271 L kgVS-1 and 220 L kgVS-1, respectively. Therefore, food waste can be successfully co-digested with fresh bovine manure in continuous feed digesters, with an initial organic load rate of at least 2.74 kgVS m-3 day-1. Future studies should aim to test progressive increases in food waste load to identify the threshold for inhibition.