Year: 2024 | Month: April | Volume: 11 | Issue: 4 | Pages: 496-505
DOI: https://doi.org/10.52403/ijrr.20240457
From Ash to Anaerobic Digestion: Optimization of Biogas Yield from Food Waste and Pineapple Peelings
Gildas David Farid Adamon1, Matar Sylla2, D. M. Grâce F. CHIDIKOFAN3, Ariane Naomi Midjaya Mahouna Zounon4
1,4Department of Energy, National Higher Institute of Industrial Technology of the University National Institute of Science (INSTI), BP 133, Republic of Benin.
2National Higher School of Energy and Process Engineering, BP 486, Abomey, Republic of Benin.
3African Biomass Conversion and energetic efficiency, Cotonou, Republic of Benin.
Corresponding Author: David G. F. Adamon
ABSTRACT
The acidity of essential waste makes anaerobic digestion difficult, slow and inefficient. The objective of this study is to find a substrate/catalyst dosage in order to improve the kinetics of decomposition of this waste, in particular that of food waste and pineapple peelings, from the ashes resulting from the carbonization of wood. Thus, we separately carried out a control anaerobic digestion consisting of 100% food waste, then 100% pineapple peelings. Then, we proceeded to anaerobic digestion with different dosages of food waste, kitchen scraps and ashes, then pineapple peelings and ashes in order to find the optimal dosage. The results obtained show that a dosage of 70% food waste and 30% ash gives maximum and accelerated production. For pineapple peelings, the maximum production is obtained with 35% of the ash mass concentration. A dosage of less than 20% ash has no noticeable effect on anaerobic digestion and may even constitute a brake on it, unlike a dosage greater than 40% which inhibits digestion.
Keywords: Ash; Anaerobic digestion; Biogas; pH
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