Journal
BIORESOURCE TECHNOLOGY
Volume 303, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.122957
Keywords
Anaerobic co-digestion; Accelerant co-substrate; Synergistic effect; Sugarcane scum; Agricultural crop residues
Funding
- Departamento Administrativo de Ciencia, Tecnologia e Innovacion (COLCIENCIAS)
- Corporacion Colombiana de Investigacion Agropecuaria (AGROSAVIA)
- Universidad Industrial de Santander (UIS)
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Anaerobic co-digestion (AcoD) of the main residues from the non-centrifugal cane sugar (NCS) making process, agricultural crop residues (ACR) and sugarcane scum (SCS), was evaluated using biochemical methane potential tests. Substrates were pretreated: ACR through particle size reduction, and SCS with dilution. The maximum methane yield of 0.276 Nm(3) CH4 kg(-1) VSadded occurred at an ACR of 2 mm and at 12.5% dilution of SCS, at a ratio of 75:25 based on volatile solids, which was 30.2% and 5.9% higher compared to SCS and ACR in mono-digestion, respectively. ACR was a substrate of adequate buffer capacity for the AcoD stability, while the SCS, in addition to helping accelerate the process, also helped improve the inoculum's methanogenic and hydrolytic activity. The first-order kinetic and dual-pool two-step models were suitable to describe methane yield. AcoD of ACR with SCS is a good option for the treatment of streams in the NCS agribusiness sector.
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