Abstract
The fruit and vegetable sector generates large amounts of waste. This organic waste is mainly generated before consumption during agricultural production and distribution. In Tunisia, fruit and vegetable waste (FVW) started creating enormous waste disposal problems due to the negative effects of improper waste management. The disposal of these wastes in a municipal landfill site represents a loss of valuable biomass and also affects the overall economy of the country. Considering the high moisture and organic content of FVW, the anaerobic digestion can be an attractive option for energy generation as well as for reducing the disposal problem. In this context, the aim of this work was to study the anaerobic co-digestion of FVW and poultry manure. The objectives were to characterize substrates by chemical-fluorescence fractionation method, investigate the performance of FVW co-digestion in a hybrid solid batch bioreactor, and evaluate the fertilization characteristics of digestate. The determination of the methane potential of substrates during mono- and co-digestion tests showed a correlation between the biogas yield and the bio-accessibility as well as the complexity index of organic matter present in FVW. The co-digestion experiment conducted in a bi-phasic reactor with leachate recirculation showed the stability of anaerobic bio-systems and an improvement of biogas yield of (22.5%). The physicochemical characterization and the phytotoxicity test indicated the fertilizing quality of obtained digestate.
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Acknowledgements
The authors thank the European Union for the financial support of the study under the ENI CBC Mediterranean Sean Basin Program (CEOMED_A_B.4.2_0058) and the financial support of Ministry of Higher Education and Scientific Research of Tunisia under the contract program of the Environmental Bioprocess Laboratory.
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Gharsallah, N., Sayadi, S., Feki, F., Jimenez, J., Khoufi, S. (2022). Anaerobic Digestion Engineering Opportunities for Fruit and Vegetable Waste Management in the Water–Energy–Waste Nexus. In: Naddeo, V., Choo, KH., Ksibi, M. (eds) Water-Energy-Nexus in the Ecological Transition. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-031-00808-5_96
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DOI: https://doi.org/10.1007/978-3-031-00808-5_96
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