Journal
CHEMICAL ENGINEERING JOURNAL
Volume 279, Issue -, Pages 681-688Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.05.071
Keywords
Inhibition; Anammox; Phenols; Quinoline
Categories
Funding
- Ministerio de Educacion y Ciencia (Spanish Government) through the ONLYBIO project [CTQ2011-24745/PPQ]
- Universitat Autonoma de Barcelona
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The short-term effect of several aromatic compounds (o-cresol, p-nitrophenol, o-chlorophenol and quinoline) was evaluated over granular anammox sludge cultivated over 2 years in a Sequencing Batch Reactor (SBR). The anammox granular sludge had an average size of 1.0 +/- 0.2 mm and was enriched in Brocadia sp. Specific Anammox Activity (SAA) batch tests with this granular biomass were carried out in the presence of o-cresol, p-nitrophenol, o-chlorophenol, quinoline and their mixtures. The anammox biomass was never exposed to the tested aromatic compounds, prior to the SAA tests. The concentration and the mixture of aromatic compounds had a strong effect over the loss of the anammox activity. The higher the concentrations of the aromatic compounds, the higher the reduction of the SAA. Quinoline and p-nitrophenol have a lower negative effect compared to o-cresol and o-chlorophenol. The Luong inhibition model seems to adjust better the inhibition of anammox biomass by the tested aromatic compounds. Depending on the aromatic compound, toxic or inhibitory effect was measured. o-Cresol and o-chlorophenol caused a toxic effect whereas p-nitrophenol and quinoline produced an inhibitory effect. In general, synergistic effects were observed when mixtures of aromatic compounds were studied. (C) 2015 Elsevier B.V. All rights reserved.
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