Anaerobic digestion model number 1 applied to the modeling of anaerobic digestion of residues generated in soluble coffee processing

Author(s)

Ninasivincha, B. E. Jorge ; Couto, P. T. ; Dias, M. E. ; Huaccha, K. ; Tommaso, G. ; Ribeiro, R.

• Document type: Journal article
• Source: Biochemical Engineering Journal; v. 209, p. 13-pg., 2024-06-15.

Abstract

The Anaerobic Digestion Model N-o. 1 (ADM1) was applied in this study to simulate the anaerobic digestion (AD) of wastewaters from soluble coffee processing in sequential batch reactors. As these substrates present considerable levels of phenolic compounds, modifications were made to the basic structure of the ADM1. Additionally, the Luong inhibition model replaced the Monod model to describe the consumption of soluble organic matter. On the other hand, the removal of phenolic compounds was carried out using the Haldane model, appropriate when the inhibition by excess substrate is present, taking into account in this case the quantification of phenols and benzoic acid as total phenols. The new ADM1-based model was calibrated with experimental data from the AD of post hydrothermal wastewater (PHWW) of spent coffee grounds (SCG) and validated with experimental data of the AD of effluents produced during the soluble coffee processing. The simulation results demonstrated that the new model moderately described the removal of phenolic compounds ( > 90 %), methane production (2.243 kg(COD)m(-3) in calibration and 6.16 kg(COD)m(-3) in validation), and the production and consumption of organic acids over time. However, in future research new metabolic pathways may be included in the model to improve its quality even more. (AU)

• FAPESP's process: 21/01657-0 - Modelling, simulation and optimization of anaerobic acidogenic plug flow reactors
• Grantee: Pamela Talita do Couto
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 22/10615-1 - Consolidation of the biorefinery concept applied to the biological treatment of wastewater and solid wastes
• Grantee: Marcelo Zaiat
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 20/07737-2 - Hydrothermal and chemical pre-treatments of wastes from the soluble coffee production coupled to metanogenesis
• Grantee: Maria Eduarda Simoes Dias
• Support Opportunities: Scholarships in Brazil - Doctorate