Harvesting zero waste from co-digested fruit and vegetable peels via integrated fermentation and pyrolysis processes

Environmental Science and Pollution Research International
Mohamed SoltanAhmed Tawfik

Abstract

The aim of this study is to assess an innovative economic approach for the production of both fermentative hydrogen and biochar from fruit and vegetable peels (FVPs) via fermentation/pyrolysis process. Firstly, in fermentation batches, multi-fermentation of FVPs positively affected the harvested hydrogen yield and COD reduction efficiency, which reached their maximal values of 3.9 ± 0.6 mmol/gCOD and 56.2 ± 4.6% at batch of 25% pea + 25% tomato + 25% banana + 25% orange (M4). Secondly, digestates produced from all batches were pyrolyzed at 500 °C for investigating the potential for biochar production. Based on the characteristics of the pyrolyzed digestate, biochar produced from S1 (spinach) exhibited the highest specific surface area, density, pore volume, biochar production yield, and pyrolysis profit of 28.43 ± 3.95 m2/g, 1.93 ± 0.18 g/cm3, 0.59 ± 0.08 cm3/g, 59.04 ± 2.36%, and 3.66 $/kgfeedstock, respectively. However, the maximum overall profit from both fermentation and pyrolysis processes was 5.21 $/kgfeedstock and was denoted for M4.

References

Jun 6, 2009·Environmental Science and Pollution Research International·Yan XingHongwei Hou
Jul 30, 2010·The Science of the Total Environment·María Molinos-SenanteRamón Sala-Garrido
Oct 27, 2015·Environmental Science and Pollution Research International·Ahmed FarghalyAmal Danial
Dec 12, 2018·Journal of Environmental Management·Sherif IsmailAhmed Tawfik

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Citations

Jan 26, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ümmihan GünerhanAltınay N Perendeci
Mar 12, 2020·Environmental Science and Pollution Research International·Rafika SaidiHassib Bouallagui
Jan 9, 2021·Bioresource Technology·Wei Wang, Duu-Jong Lee
Feb 9, 2021·Environmental Science and Pollution Research International·Xiaoyu MaQunhui Wang

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