Ivanchenko & Yelatontsev (2024): Improved agro-industrial waste utilization in biogas and fertilizer production ensuring CO2 sequestration
Anna Ivanchenko, Dmytro Yelatontsev IN: Environmental Challenges, 14, 100836, https://doi.org/10.1016/j.envc.2024.100836
The present study proposes a sustainable technology for anaerobic digestion with the simultaneous capture of carbon dioxide and sodium carbonate production. It involves pre-comminution of the organo-mineral substrate (vegetal waste, activated sludge, phosphorus-containing component, and cheese whey) facilitating anaerobic digestion, and extraction of CO2 from biogas by absorption with a 10 % NaOH solution. Biomethanation reaction was found to have the first order with the activation energy of 24.8 kJ/mol, whereas the carbon dioxide absorption degree is proportional to the CO2 content in biogas.