Title:
Factors Influencing the Co-Digestion of Mango Husk (Seed Vessel)
Author(s):
Durán-Aranguren, D. , Gómez-Hernández, J., Pinzón-Ramírez, J.L., Luna, L., Cáceres, O., Sierra, R.
Document(s):
Paper
Poster
Abstract:
This work explores some variables that could influence the co-digestion of mango seed vessel or husk (MH) in the production of biomethane using the BMP potential test. First, the influence of the inoculum source was evaluated using rabbit manure (RM) and pig manure (PM). After that, the effect of adsorbent materials on the generation of methane enriched biogas was evaluated using activated carbon, silica gel, and pectin. Finally, the effect of the nitrogen source (Yeast extract and L-Arginine) and the carbon to nitrogen ratio (C/N) was studied. Results demonstrate that after 550 hours, SM + MH produced 173.75 mL CH4 /g VS, while RM + MH produced 69.75 mL CH4 /g VS. The addition of the mango husk on swine manure increased the cumulative production of methane by 64%. On the other hand, the addition of the inoculum to rabbit manure increased methane production by 55%. Additionally, it was demonstrated a higher methane production in the digesters with the addition of commercial chemical adsorbents, where pectin stands-out with a methane production of 483.50 ± 20.97 mL CH4 / g SV, which is an amount six times greater than the inoculum alone. It was found that the catalytic properties of each adsorbent regarding surface area could improve anaerobic digestion, which also increase the total methane production. Two nitrogen sources, yeast extract, and L-Arginine, and two C/N ratios, 30:1 and 10:1 were also tested. The highest yield was obtained using yeast extract with a C/N of 10:1, reaching a value of 264.17 ± 19.25 mL CH4/gVS, which was almost 1.5 times the yield of the second-best configuration (L-Arginine and a C/N of 10:1). It is possible to conclude that the C/N ratio has influence on the results of the BMP tests while the nitrogen source does not. The production of methane for the different combinations of substrate and inoculum was adjusted by using non-linear regression to the first-order model and the modified Gompertz model which were found to describe adequately the behavior observed.
Keywords:
biogas, yield, mango residues, mathematical modeling
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Anaerobic Digestion for Biogas and Biomethane Production
Event:
29th European Biomass Conference and Exhibition
Session:
2CV.7.2
Pages:
605 - 610
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-2CV.7.2
Price:
FREE
