Ammonium as a sustainable proton shuttle in bioelectrochemical systems

Cord-Ruwisch, Ralf, Law, Yingyu and Cheng, Ka Yu (2011) Ammonium as a sustainable proton shuttle in bioelectrochemical systems. Bioresource Technology, 102 20: 9691-9696. doi:10.1016/j.biortech.2011.07.100


Author Cord-Ruwisch, Ralf
Law, Yingyu
Cheng, Ka Yu
Title Ammonium as a sustainable proton shuttle in bioelectrochemical systems
Journal name Bioresource Technology   Check publisher's open access policy
ISSN 0960-8524
Publication date 2011-10
Sub-type Article (original research)
DOI 10.1016/j.biortech.2011.07.100
Volume 102
Issue 20
Start page 9691
End page 9696
Total pages 6
Place of publication Netherlands
Publisher Elsevier BV
Collection year 2012
Language eng
Formatted abstract This work examines a pH control method using ammonium (NH4+) as a sustainable proton shuttle in a CEM-equipped BES. Current generation was sustained by adding NH3 or ammonium hydroxide (NH4OH) to the anolyte, controlling its pH at 7. Ammonium ion migration maintained the catholyte pH at approximately 9.25. Such NH4+/NH3 migration accounted for 90±10% of the ionic flux in the BES. Reintroducing the volatilized NH3 from the cathode into the anolyte maintained a suitable anolyte pH for sustained microbial-driven current generation. Hence, NH4+/NH3 acted as a proton shuttle that is not consumed in the process.
Keyword Cation exchange membrane
Microbial fuel cell
Optimization
PH split
Proton gradient
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Non HERDC
 
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Created: Fri, 04 Nov 2011, 11:18:28 EST by Ms Yingyu Law on behalf of School of Mechanical and Mining Engineering