Investigating the role of adsorption and biodegradation in the removal of organic micropollutants during biological activated carbon filtration of treated wastewater

Rattier, Maxime, Reungoat, Julien, Gernjak, Wolfgang, Joss, Adriano and Keller, Jurg (2012) Investigating the role of adsorption and biodegradation in the removal of organic micropollutants during biological activated carbon filtration of treated wastewater. Journal of Water Reuse and Desalination, 2 3: 127-139. doi:10.2166/wrd.2012.012

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Author Rattier, Maxime
Reungoat, Julien
Gernjak, Wolfgang
Joss, Adriano
Keller, Jurg
Title Investigating the role of adsorption and biodegradation in the removal of organic micropollutants during biological activated carbon filtration of treated wastewater
Journal name Journal of Water Reuse and Desalination   Check publisher's open access policy
ISSN 2220-1319
Publication date 2012-01-01
Sub-type Article (original research)
DOI 10.2166/wrd.2012.012
Volume 2
Issue 3
Start page 127
End page 139
Total pages 13
Place of publication London, United Kingdom
Publisher IWA Publishing
Collection year 2013
Language eng
Abstract Municipal water recycling may expose humans and the environment to trace organic contaminants. We assessed biological activated carbon (BAC) filtration for removal of organic micropollutants (MPs). Adsorption experiments were carried out in batch reactors containing secondary effluent and new granular activated carbon (GAC) and preloaded BAC media. Results show that BAC has good potential for removal of dissolved organic carbon (40%) and MPs (60–95%). The primary objective was to better understand removal mechanisms of representative MPs at environmentally relevant concentrations. Adsorption and biodegradation of 20 compounds of varying physico-chemical properties were investigated by inhibiting the biomass with azide. Average removal of compounds by adsorption on GAC was 88 ± 5% with no influence of azide. Average BAC removal was 72 ± 15%, reduced to 59 ± 20% after azide addition, showing that biological activity is important for MP removal. Comparison of MP removal by BAC and BAC + azide showed a more important impact of the inhibition on the removal of negatively charged compounds. Sustained removal of recalcitrant compounds showed that BAC maintained sorption capacity. These results highlight the advantage of a combination of adsorption and biodegradation as compared to other biofiltration techniques for the long-term attenuation of MPs.
Keyword Adsorption
Biodegradation
Microbial activity
Organic micropollutants
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
Advanced Water Management Centre Publications
 
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Created: Fri, 03 Aug 2012, 00:48:26 EST by Maxime Rattier on behalf of Advanced Water Management Centre