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Amelioration of photofermentative hydrogen production from molasses dark fermenter effluent by zeolite-based removal of ammonium ion
Date
2012-11-01
Author
Androga, Dominic Deo
Ozgur, Ebru
EROĞLU, İNCİ
Gündüz, Ufuk
Yucel, Meral
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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One of the challenges in the development of integrated dark and photofermentative biological hydrogen production systems is the presence of ammonium ions in dark fermentation effluent (DFE). Ammonium strongly inhibits the sequential photofermentation process, and so its removal is required for successful process integration. In this study, the removal of ammonium ions from molasses DFE using a natural zeolite (clinoptilolite) was investigated. The samples were treated with batch suspensions of Na-form clinoptilolite. The ammonium ion concentration could be reduced from 7.60 mM to 1.60 mM and from 12.30 mM to 2.40 mM for two different samples. Photofermentative hydrogen production on treated and untreated molasses DFE samples were investigated in batch photo-bioreactors by an uptake hydrogenase deleted (hup(-)) mutant strain of Rhodobacter capsulotus. Maximum hydrogen productivities of 1.11 mmol H-2/L-c.h and 1.16 mmol H-2/L-c.h and molar yields of 79% and 90% were attained in the treated DFE samples, while the untreated samples resulted in no hydrogen production. The results showed that ammonium ions in molasses DFE could be effectively removed using clinoptilolite by applying a cost-effective, simple batch process. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Subject Keywords
Dark fermentation
,
Photofermentation
,
Ammonium
,
Clinoptilolite
,
Rhodobacter capsulatus
URI
https://hdl.handle.net/11511/31804
Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
DOI
https://doi.org/10.1016/j.ijhydene.2012.02.177
Collections
Graduate School of Natural and Applied Sciences, Article
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D. D. Androga, E. Ozgur, İ. EROĞLU, U. Gündüz, and M. Yucel, “Amelioration of photofermentative hydrogen production from molasses dark fermenter effluent by zeolite-based removal of ammonium ion,”
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
, pp. 16421–16429, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31804.