Nutrient recovery from wastewater through pilot scale electrodialysis

Ward, Andrew J., Arola, Kimmo, Thompson Brewster, Emma, Mehta, Chirag M. and Batstone, Damien J. (2018) Nutrient recovery from wastewater through pilot scale electrodialysis. Water Research, 135 57-65. doi:10.1016/j.watres.2018.02.021

Author Ward, Andrew J.
Arola, Kimmo
Thompson Brewster, Emma
Mehta, Chirag M.
Batstone, Damien J.
Title Nutrient recovery from wastewater through pilot scale electrodialysis
Journal name Water Research   Check publisher's open access policy
ISSN 1879-2448
Publication date 2018-02-08
Year available 2018
Sub-type Article (original research)
DOI 10.1016/j.watres.2018.02.021
Open Access Status Not yet assessed
Volume 135
Start page 57
End page 65
Total pages 9
Place of publication London, United Kingdom
Publisher IWA Publishing
Language eng
Subject 2302 Ecological Modelling
2312 Water Science and Technology
2311 Waste Management and Disposal
2310 Pollution
Abstract Nutrient recovery performance utilising an electrodialysis (ED) process was quantified in a 30-cell pair pilot reactor with a 7.2 meffective membrane area, utilising domestic anaerobic digester supernatant, which had been passed through a centrifuge as a feed source (centrate). A concentrated product (NH-N 7100 ± 300 mg/L and K 2490 ± 40 mg/L) could be achieved by concentrating nutrient ions from the centrate wastewater dilute feed stream to the product stream using the ED process. The average total current efficiency for all major cations over the experimental period was 76 ± 2% (NH-N transport 40%, K transport 14%). The electrode power consumption was 4.9 ± 1.5 kWh/kgN, averaged across the three replicate trials. This value is lower than competing technologies for NH-N removal and production, and far lower than previous ED lab trials, demonstrating the importance of pilot testing. No significant variation in starting flux densities and cell resistance voltage for subsequent replicate treatments indicated effective cleaning procedures and operational sustainability at treatment durations of several days. This study demonstrates that ED is an economically promising technology for the recovery of nutrients from wastewater.
Keyword Ammonia
Nutrient recovery
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID UQ00061
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
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Created: Wed, 21 Feb 2018, 11:01:53 EST