Title:
Anaerobic Co-digestion of Cellulose Cake Residue and Food Waste as a Decarbonization Strategy for the Chlorine and Soda Production Industry in Brazil
Author(s):
de Abreu, I.B., Silva, E.G.M., de Sousa, M.H., Washington, S.M.C.B., Correa, T.C.M.A., Muller, A.M., de Souza, R.B., Menezes, R.S.C., Dutra, E.D.
Document(s):
Paper
Abstract:
The chlor-alkali industry is significant worldwide. In pursuit of greater efficiency, safety, and sustainability, the sector is undergoing a transformation, with an increasing adoption of membrane technology. This study evaluated the anaerobic co-digestion of waste generated in the brine preparation stage, cellulose cake (CC), with food waste (FW) from the company's cafeteria. It was observed that, under the company's generation conditions, 75% CC and 25% FW, it would be possible to obtain a yield of 264.09 ± 20.38 NmL.gSV-1 of biogas with a methane concentration of 69.88 ± 1.28%. In addition, it was possible to replace 75% of the water with effluent from the process. If necessary, the biodigester could operate solely with CC, yielding an estimated 488.06 ± 23.57 NmL.gSV-1 of biogas, with 60.35 ± 2.69% methane content. An analysis of greenhouse gas (GHG) emissions showed that, compared to sending waste to landfills, biodigestion would reduce emissions by 92.5%. In this sense, the potential of anaerobic biodigestion technology is evident, contributing to the sector's sustainability.
Keywords:
industrial waste, circular bioeconomy, bioprocess
Topic:
Sustainable Resources for Decarbonising the Economy
Subtopic:
Municipal and industrial wastes
Event:
33rd European Biomass Conference and Exhibition
Session:
1CO.2.3
Pages:
97 - 105
ISBN:
978-88-89407-25-7
Paper DOI:
10.5071/33rdEUBCE2025-1CO.2.3
Price:
FREE
