High current generation coupled to caustic production using a lamellar bioelectrochemical system

Rabaey, Korneel, Butzer, Simone, Brown, Shelley, Keller, Jurg and Rozendal, Rene A. (2010) High current generation coupled to caustic production using a lamellar bioelectrochemical system. Environmental Science & Technology, 44 11: 4315-4321. doi:10.1021/es9037963


Author Rabaey, Korneel
Butzer, Simone
Brown, Shelley
Keller, Jurg
Rozendal, Rene A.
Title High current generation coupled to caustic production using a lamellar bioelectrochemical system
Journal name Environmental Science & Technology   Check publisher's open access policy
ISSN 0013-936X
Publication date 2010-05-06
Sub-type Article (original research)
DOI 10.1021/es9037963
Volume 44
Issue 11
Start page 4315
End page 4321
Total pages 7
Editor Jerald Schnoor
Place of publication United States
Publisher American Chemical Society
Collection year 2011
Language eng
Abstract Recently, bioelectrochemical systems (BESs) have emerged as a promising technology for energy and product recovery from wastewaters. To become economically viable, BESs need to (i) reach sufficient turnover rates at scale and (ii) generate a product that offsets the investment costs within a reasonable time frame. Here we used a liter scale, lamellar BES to produce a caustic solution at the cathode. The reactor was operated as a three-electrode system, in which the anode potential was fixed and power was supplied over the reactor to allow spontaneous anodic current generation. In laboratory conditions, with acetate as electron donor in the anode, the system generated up to 1.05 A (at 1.77 V applied cell voltage, 1015 A m−3 anode volume), and allowed for the production of caustic to 3.4 wt %, at an acetate to caustic efficiency of 61%. The reactor was subsequently operated on a brewery site, directly using effluent from the brewing process. Currents of up to 0.38 A were achieved within a six-week time frame. Considerable fluctuations over weekly periods were observed, due to operational parameter changes. This study is the first to demonstrate effective production of caustic at liter scale, using BESs both in laboratory and field conditions. It also shows that input of power can easily be justified by product value.
Keyword Microbial fuel-cells
Electricity-generation
Oxygen Reduction
Waste-water
Cathode
Anode
Membrane
Power
PH
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Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online 5 June, 2010.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
Advanced Water Management Centre Publications
 
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Created: Sun, 13 Jun 2010, 00:05:55 EST