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Author  |
Giustinianovich, E.A.; Campos, J.L.; Roeckel, M.D.; Estrada, A.J.; Mosquera-Corral, A.; del Rio, A.V. |
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Title |
Influence of biomass acclimation on the performance of a partial nitritation-anammox reactor treating industrial saline effluents |
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Year |
2018 |
Publication |
Chemosphere |
Abbreviated Journal |
Chemosphere |
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Volume |
194 |
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Pages |
131-138 |
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Keywords |
Anammox; Canning industry effluents; Nitrogen removal; Partial nitritation; Saline effluents |
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Abstract |
The performance of the partial nitritation/anammox processes was evaluated for the treatment of fish canning effluents. A sequencing batch reactor (SBR) was fed with industrial wastewater, with variable salt and total ammonium nitrogen (TAN) concentrations in the range of 1.75-18.00 g-NaCl L-1 and 112 – 267 mg-TAN L-1. The SBR operation was divided into two experiments: (A) progressive increase of salt concentrations from 1.75 to 1833 g-NaCl L-1; (B) direct application of high salt concentration (18 g-NaCl L-1). The progressive increase of NaCl concentration provoked the inhibition of the anammox biomass by up to 94% when 18 g-NaCl L-1 were added. The stable operation of the processes was achieved after 154 days when the nitrogen removal rate was 0.021 +/- 0.007 g N/L.d (corresponding to 30% of removal efficiency). To avoid the development of NOB activity at low salt concentrations and to stabilize the performance of the processes dissolved oxygen was supplied by intermittent aeration. A greater removal rate of 0.029 +/- 0.017 g-N L-1 d(-1) was obtained with direct exposure of the inoculum to 18 g-NaCl L-1 in less than 40 days. Also, higher specific activities than those from the inoculum were achieved for salt concentrations of 15 and 20 g-NaCl L-1 after 39 days of operation. This first study of the performance of the partial nitritation/anammox processes, to treat saline wastewaters, indicates that the acclimation period can be avoided to shorten the start-up period for industrial application purposes. Nevertheless, further experiments are needed in order to improve the efficiency of the processes. (C) 2017 Elsevier Ltd. All rights reserved. |
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Address |
[Giustinianovich, Elisa A.; Roeckel, Marlene D.] Univ Concepcion, Dept Chem Engn, Concepcion, Chile, Email: mangeles.val@usc.es |
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Publisher |
Pergamon-Elsevier Science Ltd |
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Language |
English |
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ISSN |
0045-6535 |
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Notes |
WOS:000423890700017 |
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Call Number |
UAI @ eduardo.moreno @ |
Serial |
817 |
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