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Bioresour Technol

Title:		Ammonium recovery from reject water combined with hydrogen production in a bioelectrochemical reactor
Author(s):		Wu X; Modin O;
Address:		"Division of Water Environment Technology, Civil and Environmental Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden. Electronic address: sherrywu7@hotmail.com. Division of Water Environment Technology, Civil and Environmental Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden. Electronic address: oskar.modin@chalmers.se"
Journal Title:		Bioresour Technol
Year:		2013
Volume:		20130802
Issue:
Page Number:		530 - 536
DOI:		10.1016/j.biortech.2013.07.130
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"In this study, a bioelectrochemical reactor was investigated for simultaneous hydrogen production and ammonium recovery from reject water, which is an ammonium-rich side-stream produced from sludge treatment processes at wastewater treatment plants. In the anode chamber of the reactor, microorganisms converted organic material into electrical current. The electrical current was used to generate hydrogen gas at the cathode with 96+/-6% efficiency. Real or synthetic reject water was fed to the cathode chamber where proton reduction into hydrogen gas resulted in a pH increase which led to ammonium being converted into volatile ammonia. The ammonia could be stripped from the solution and recovered in acid. Overall, ammonium recovery efficiencies reached 94% with synthetic reject water and 79% with real reject water. This process could potentially be used to make wastewater treatment plants more resource-efficient and further research is warranted"
Keywords:		"Ammonia/chemistry Ammonium Compounds/*chemistry Bioelectric Energy Sources Bioreactors Electrochemistry/*methods Electrodes Electrolysis Gases Hydrogen/*chemistry Hydrogen-Ion Concentration Nitrogen/chemistry Sewage Waste Disposal, Fluid/methods Wastewate;"
Notes:		"MedlineWu, Xue Modin, Oskar eng Research Support, Non-U.S. Gov't England 2013/08/27 Bioresour Technol. 2013 Oct; 146:530-536. doi: 10.1016/j.biortech.2013.07.130. Epub 2013 Aug 2"