Efficient hydrogen gas production from molasses in hybrid anaerobic-activated sludge-rotating biological contactor

Mohammadi, Mahin and Mohammadi, Parviz and Karami, Nasim and Barzegar, Akbar and Annuar, Mohamad Suffian Mohamad (2019) Efficient hydrogen gas production from molasses in hybrid anaerobic-activated sludge-rotating biological contactor. International Journal of Hydrogen Energy, 44 (5). pp. 2592-2602. ISSN 0360-3199

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Official URL: https://doi.org/10.1016/j.ijhydene.2018.12.033

Abstract

A hybrid anaerobic activated sludge and rotating biological contactor (AnAS-RBC) reactor with sludge return was investigated for biological hydrogen production from molasses by a mixed culture of hydrogen-producing bacteria via a dark fermentation process. The pH was not controlled during the experiments. The effects of organic loading rate (OLR) and disk rotational speed (DRS) on process performance were studied using response surface methodology. Both OLR and DRS showed significant effects on all process responses. High levels of DRS were found favorable for efficient process. Optimal mixing of the bacterial culture contributed towards higher acetate production resulting in higher hydrogen production. The highest hydrogen production (168 mL/g COD) was achieved by applying OLR and DRS of 23 g/L.d and 30 rpm, respectively. In this study, the highest percentage of hydrogen in biogas produced was 87% in hydraulic retention time of 12 h. © 2018 Hydrogen Energy Publications LLC

Item Type: Article
Uncontrolled Keywords: Hydrogen production; Organic loading rate; Disk rotational speed; Response surface methodology
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Q Science > QR Microbiology
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 11 Mar 2020 03:22
Last Modified: 11 Mar 2020 03:22
URI: http://eprints.um.edu.my/id/eprint/24001

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