Performance and microbial features of the partial nitritation-anammox process treating fish canning wastewater with variable salt concentrations

Angeles Val del Rio, Andres Pichel, Nuria Fernandez-Gonzalez, Alba Pedrouso, Andrea Fra-Vázquez, Nicolas Morales, Ramon Mendez, Jose Luis Campos, Anuska Mosquera-Corral

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

The partial nitritation-anammox (PN-AMX) process applied to wastewaters with high NaCl concentration was studied until now using simulated media, without considering the effect of organic matter concentration and the shift in microbial populations. This research work presents results on the application of this process to the treatment of saline industrial wastewater. Obtained results indicated that the PN-AMX process has the capability to recover its initial activity after a sudden/acute salt inhibition event (up to 16 g NaCl/L). With a progressive salt concentration increase for 150 days, the PN-AMX process was able to remove the 80% of the nitrogen at 7–9 g NaCl/L. The microbiological data indicated that NaCl and ammonia concentrations and temperature are important factors shaping PN-AMX communities. Thus, the NOB abundance (Nitrospira) decreases with the increase of the salt concentration, while heterotrophic denitrifiers are able to outcompete anammox after a peak of organic matter in the feeding.

Original languageEnglish
Pages (from-to)112-121
Number of pages10
JournalJournal of Environmental Management
Volume208
DOIs
StatePublished - 15 Feb 2018
Externally publishedYes

Keywords

  • Autotrophic
  • Denitrification
  • Fish canning
  • Granule
  • Nitrogen

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