Redistribution of wastewater alkalinity with a microbial fuel cell to support nitrification of reject water

Modin, Oskar, Fukushi, Kensuke, Rabaey, Korneel, Rozendal, Rene A. and Yamamoto, Kazuo (2011) Redistribution of wastewater alkalinity with a microbial fuel cell to support nitrification of reject water. Water Research, 45 8: 2691-2699. doi:10.1016/j.watres.2011.02.031


Author Modin, Oskar
Fukushi, Kensuke
Rabaey, Korneel
Rozendal, Rene A.
Yamamoto, Kazuo
Title Redistribution of wastewater alkalinity with a microbial fuel cell to support nitrification of reject water
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
1879-2448
Publication date 2011-04-01
Sub-type Article (original research)
DOI 10.1016/j.watres.2011.02.031
Volume 45
Issue 8
Start page 2691
End page 2699
Total pages 9
Place of publication London, United Kingdom
Publisher IWA
Language eng
Formatted abstract
In wastewater treatment plants, the reject water from the sludge treatment processes typically contains high ammonium concentrations, which constitute a significant internal nitrogen load in the plant. Often, a separate nitrification reactor is used to treat the reject water before it is fed back into the plant. The nitrification reaction consumes alkalinity, which has to be replenished by dosing e.g. NaOH or Ca(OH)2. In this study, we investigated the use of a two-compartment microbial fuel cell (MFC) to redistribute alkalinity from influent wastewater to support nitrification of reject water. In an MFC, alkalinity is consumed in the anode compartment and produced in the cathode compartment. We use this phenomenon and the fact that the influent wastewater flow is many times larger than the reject water flow to transfer alkalinity from the influent wastewater to the reject water. In a laboratory-scale system, ammonium oxidation of synthetic reject water passed through the cathode chamber of an MFC, increased from 73.8 ± 8.9 mgN/L under open-circuit conditions to 160.1 ± 4.8 mgN/L when a current of 1.96 ± 0.37 mA (15.1 mA/L total MFC liquid volume) was flowing through the MFC. These results demonstrated the positive effect of an MFC on ammonium oxidation of alkalinity-limited reject water.
Keyword Microbial fuel cell
Nitrification
Reject water
Wastewater
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Advanced Water Management Centre Publications
 
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