Carboxylic acids: formation and removal in full-scale plants

This article presents data on the formation and removal of carboxylic acids in a full-scale treatment plant employing ozonation and biological filtration. Carboxylic acid concentrations increased after ozonation and decreased through subsequent filtration. Simple linear relationships between major w...

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Bibliographic Details
Published in:Journal - American Water Works Association 1997-08, Vol.89 (8), p.88-97
Main Authors: Gagnon, Graham A., Booth, Stephen D.J., Peldszus, Sigrid, Mutti, Dennis, Smith, Franklyn, Huck, Peter M.
Format: Article
Language:English
Subjects:
Acetates
Aldehydes
Applied sciences
Biofiltration
Biological Filters
Carbon
Carboxylic acids
Caustic soda
Disinfection Byproducts
Drinking water
Drinking water and swimming-pool water. Desalination
Effluents
Exact sciences and technology
Experiments
Filtration
Formates
Glycolates
Modeling
Ozonation
Ozone
Pollution
Sedimentation & deposition
Treatment Plants
Waste byproducts
Water quality
Water treatment
Water treatment and pollution
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Summary:This article presents data on the formation and removal of carboxylic acids in a full-scale treatment plant employing ozonation and biological filtration. Carboxylic acid concentrations increased after ozonation and decreased through subsequent filtration. Simple linear relationships between major water quality parameters (e. g., temperature, pH) and acid formation did not exist. Yields of carboxylic acids on ozonation were an order of magnitude greater than for the corresponding aldehyde. An empirical linear model could describe the removal of carboxylic acids through biological filtration from a practical point of view. However, the data suggest the removal mechanism may be complex. Although contact times in the filters were quite long (on the order of 30 min), removal of several carboxylic acids was incomplete (e.g., average effluent concentration of formate was 44 pg/L).
ISSN:0003-150X
1551-8833
DOI:10.1002/j.1551-8833.1997.tb08279.x