Title: Effect of single and multi-additives on the performance of hydrogen fermentation from food waste

Authors: Chinmay Deheri; Saroj Kumar Acharya

Addresses: Department of Mechanical Engineering, ITER, SOA Deemed to be University, Odisha, 751030, India ' Department of Mechanical Engineering, ITER, SOA Deemed to be University, Odisha, 751030, India

Abstract: Hydrogen as an alternative energy source receives primary importance considering the greenhouse gas emission from conventional fossil fuels. In this study, calcium peroxide (CaO₂), calcium carbonate (CaCO₃), zinc oxide (ZnO), and copper oxide (CuO) were used as single additives, whereas CaO₂+CaCO₃, CaO₂+CuO, CaO₂+ZnO, CaCO₃+ZnO, CaCO₃+CuO, and CuO+ZnO were used as multi-additives to improve hydrogen fermentation using food waste and cow dung as substrate and sludge solution as inoculum. As a result, maximum hydrogen content was enhanced up to 33.85% with multi-additive (CaO₂+CaCO₃), whereas it was restricted to 26.34% using single additives. Compared to the control reactor, maximum hydrogen content was increased by 10 and 17% with single and multi-additives, respectively. Further, cumulative hydrogen yield was considerably enhanced from 114.1 to 146.62 mL g^-1 TS by adding multi-additives, especially CaO₂+CaCO₃. Results demonstrated that multi-additives improved the system performance due to the enhanced process stability during fermentative hydrogen production.

Keywords: hydrogen production; additives; anaerobic fermentation; food waste; cow dung.

DOI: 10.1504/IJGW.2022.122433

International Journal of Global Warming, 2022 Vol.26 No.4, pp.405 - 416

Received: 21 Jul 2021
Accepted: 06 Sep 2021
Published online: 25 Apr 2022 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article