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Nitrate reduction using an electrode as direct electron donor in a biofilm-electrode reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
36675 45139 2005 6 PDF Available
Title
Nitrate reduction using an electrode as direct electron donor in a biofilm-electrode reactor
Abstract

Nitrate reduction using an electrode as a direct electron donor in a biofilm-electrode reactor was investigated to treat an aqueous solution containing high concentrations of nitrate. In the absence of organic substances, nitrate was reduced by micro-organisms consuming electrons from the electrode. The maximum nitrate reduction rate was 98% at an applied current of 200 mA. As nitrate concentrations decreased, the oxidation–reduction potential (ORP) gradually decreased from −80 to −260 mA. The maximum volumetric nitrate removal rate obtained from the biofilm-electrode reactor was 0.17 mg NO3−-N/(cm2 (biofilm surface area) day).

Keywords
Nitrate reduction; Electrode; Electron donor; Biofilm-electrode reactor; Biofilm
First Page Preview
Nitrate reduction using an electrode as direct electron donor in a biofilm-electrode reactor
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 10, October 2005, Pages 3383–3388
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering