Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study

Mixed culture sludge has been widely used as a microbial consortium for biohydrogen production. Simple thermal treatment of sludge is usually required in order to eliminate any H2-consuming bacteria that would reduce H2 production. In this study, thermal treatment of sludge was carried out at variou...

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Main Authors:	Amin, Mohammad Mehdi, Taheri, Ensiyeh, Bina, Bijan, van Ginkel, Steven W., Ghasemian, Mohammad, Mohamad Puad, Noor Illi, Fatehizadeh, Ali
Format:	Article
Language:	English English
Published:	Elsevier Inc. 2019
Subjects:	T Technology (General) TP155 Chemical engineering TP248.13 Biotechnology
Online Access:	http://irep.iium.edu.my/74918/ http://irep.iium.edu.my/74918/ http://irep.iium.edu.my/74918/ http://irep.iium.edu.my/74918/1/74918_Electron%20flow%20of%20biological%20H2%20production.pdf http://irep.iium.edu.my/74918/2/74918_Electron%20flow%20of%20biological%20H2%20production_SCOPUS.pdf

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recordtype	eprints
spelling	iium-749182020-01-31T07:06:58Z http://irep.iium.edu.my/74918/ Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study Amin, Mohammad Mehdi Taheri, Ensiyeh Bina, Bijan van Ginkel, Steven W. Ghasemian, Mohammad Mohamad Puad, Noor Illi Fatehizadeh, Ali T Technology (General) TP155 Chemical engineering TP248.13 Biotechnology Mixed culture sludge has been widely used as a microbial consortium for biohydrogen production. Simple thermal treatment of sludge is usually required in order to eliminate any H2-consuming bacteria that would reduce H2 production. In this study, thermal treatment of sludge was carried out at various temperatures. Electron flow model was then applied in order to assess community structure in the sludge upon thermal treatment for biohydrogen production. Results show that the dominant electron sink was acetate (150–217 eˉ meq/mol glucose). The electron equivalent (eˉ eq) balances were within 0.8–18% for all experiments. Treatment at 100 °C attained the highest H2 yield of 3.44 mol H2/mol glucose from the stoichiometric reaction. As the treatment temperature increased from 80 to 100 °C, the computed acetyl-CoA and reduced form of ferredoxin (Fdred) concentrations increased from 13.01 to 17.34 eˉ eq (1.63–2.17 mol) and 1.34 to 4.18 eˉ eq (0.67–2.09 mol), respectively. The NADH2 balance error varied from 3 to 10% and the term eˉ(Fd↔NADH2) (m) in the NADH2 balance was NADH2 consumption (m = −1). The H2 production was mainly via the Fd:hydrogenase system and this is supported with a good NADH2 balance. Using the modified Gompertz model, the highest maximum H2 production potential was 1194 mL whereas the maximum rate of H2 production was 357 mL/h recorded at 100 °C of treatment. Elsevier Inc. 2019-11-15 Article PeerReviewed application/pdf en http://irep.iium.edu.my/74918/1/74918_Electron%20flow%20of%20biological%20H2%20production.pdf application/pdf en http://irep.iium.edu.my/74918/2/74918_Electron%20flow%20of%20biological%20H2%20production_SCOPUS.pdf Amin, Mohammad Mehdi and Taheri, Ensiyeh and Bina, Bijan and van Ginkel, Steven W. and Ghasemian, Mohammad and Mohamad Puad, Noor Illi and Fatehizadeh, Ali (2019) Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study. Journal of Environmental Management, 250. pp. 1-7. ISSN 0301-4797 https://www.sciencedirect.com/journal/journal-of-environmental-management https://doi.org/10.1016/j.jenvman.2019.109461
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	T Technology (General) TP155 Chemical engineering TP248.13 Biotechnology
spellingShingle	T Technology (General) TP155 Chemical engineering TP248.13 Biotechnology Amin, Mohammad Mehdi Taheri, Ensiyeh Bina, Bijan van Ginkel, Steven W. Ghasemian, Mohammad Mohamad Puad, Noor Illi Fatehizadeh, Ali Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study
description	Mixed culture sludge has been widely used as a microbial consortium for biohydrogen production. Simple thermal treatment of sludge is usually required in order to eliminate any H2-consuming bacteria that would reduce H2 production. In this study, thermal treatment of sludge was carried out at various temperatures. Electron flow model was then applied in order to assess community structure in the sludge upon thermal treatment for biohydrogen production. Results show that the dominant electron sink was acetate (150–217 eˉ meq/mol glucose). The electron equivalent (eˉ eq) balances were within 0.8–18% for all experiments. Treatment at 100 °C attained the highest H2 yield of 3.44 mol H2/mol glucose from the stoichiometric reaction. As the treatment temperature increased from 80 to 100 °C, the computed acetyl-CoA and reduced form of ferredoxin (Fdred) concentrations increased from 13.01 to 17.34 eˉ eq (1.63–2.17 mol) and 1.34 to 4.18 eˉ eq (0.67–2.09 mol), respectively. The NADH2 balance error varied from 3 to 10% and the term eˉ(Fd↔NADH2) (m) in the NADH2 balance was NADH2 consumption (m = −1). The H2 production was mainly via the Fd:hydrogenase system and this is supported with a good NADH2 balance. Using the modified Gompertz model, the highest maximum H2 production potential was 1194 mL whereas the maximum rate of H2 production was 357 mL/h recorded at 100 °C of treatment.
format	Article
author	Amin, Mohammad Mehdi Taheri, Ensiyeh Bina, Bijan van Ginkel, Steven W. Ghasemian, Mohammad Mohamad Puad, Noor Illi Fatehizadeh, Ali
author_facet	Amin, Mohammad Mehdi Taheri, Ensiyeh Bina, Bijan van Ginkel, Steven W. Ghasemian, Mohammad Mohamad Puad, Noor Illi Fatehizadeh, Ali
author_sort	Amin, Mohammad Mehdi
title	Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study
title_short	Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study
title_full	Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study
title_fullStr	Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study
title_full_unstemmed	Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study
title_sort	electron flow of biological h2 production by sludge under simple thermal treatment: kinetic study
publisher	Elsevier Inc.
publishDate	2019
url	http://irep.iium.edu.my/74918/ http://irep.iium.edu.my/74918/ http://irep.iium.edu.my/74918/ http://irep.iium.edu.my/74918/1/74918_Electron%20flow%20of%20biological%20H2%20production.pdf http://irep.iium.edu.my/74918/2/74918_Electron%20flow%20of%20biological%20H2%20production_SCOPUS.pdf
first_indexed	2023-09-18T21:46:01Z
last_indexed	2023-09-18T21:46:01Z
_version_	1777413454523531264

Electron flow of biological H2 production by sludge under simple thermal treatment: Kinetic study

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