Effect of fruits and vegetables in the anaerobic digestion of food waste from university restaurant

Effect of fruits and vegetables in the anaerobic digestion of food waste from university restaurant

The aim of this study was to evaluate the theoretical potential of methane production of the food waste generated by a university restaurant, as well as to verify the influence of the fruit and vegetable waste in the feeding composition of an anaerobic bioreactor treating this type of waste. Four fe...

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Bibliographic Details
Published in:Applied biochemistry and biotechnology Vol. 194; no. 8; pp. 3365 - 3383
Main Authors: de Amarante, Marina Campos Assumpção, Guerreiro, Pablo Eduardo Godinho, Radmann, Elisangela Martha, de Souza, Michele da Rosa Andrade Zimmermann
Format: Journal Article
Language:English
Published: New York Springer US 01-08-2022
Springer Nature B.V
Subjects:
Anaerobic digestion
Anaerobic processes
Anaerobic treatment
Beans
Biochemistry
Bioreactors
Biotechnology
Chemistry
Chemistry and Materials Science
Composition
Feeding
Food
Food waste
Fruits
Methane
Mixtures
Organic matter
Original Article
Sludge
Sludge digestion
Vegetables
Biodegradation
Specific methanogenic activity
Theoretical potential of methane production
Methanogens
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Summary:The aim of this study was to evaluate the theoretical potential of methane production of the food waste generated by a university restaurant, as well as to verify the influence of the fruit and vegetable waste in the feeding composition of an anaerobic bioreactor treating this type of waste. Four feeding compositions combining three fractions of the food waste (fruit and vegetable fraction, soy protein and beans fraction, and rice fraction) at different concentrations were tested in anaerobic processes lasting 10 and 30 days. Additionally, a study of the theoretical potential of methane production from each fraction that composes the food waste was carried out, as well as the evaluation of the specific methanogenic activity of the anaerobic sludge. Despite its low theoretical potential of methane production (0.037 L CH4 /g), the presence of the fruit and vegetable mixture in three of the feeding compositions led to greater organic matter degradation (above 69%) and CH 4 yields (above 0.20 L CH4 /g VS ) in both periods tested, in comparison with the achieved by the feeding composition lacking this fraction. The results suggest that the presence of the fruit and vegetable mixture contributed with the supplementation of micro- and macroelements to the anaerobic sludge during the digestion of food waste.
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ISSN:0273-2289
1559-0291
DOI:10.1007/s12010-022-03895-8