Anaerobic treatment of intensive fish culture effluents: volatile fatty acid mediated denitrification

Yossi Aboutboul, Roy Arviv, Jaap van Rijn*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Denitrifying activity was examined in a laboratory-scale fluidized bed reactor coupled to a digestion basin in which fish feed was anaerobically degraded. Under these conditions volatile fatty acids (VFA; acetate, propionate and butyrate), released during anaerobic feed degradation, were found to fuel the denitrifying activity in the fluidized bed reactor. VFA fatty acid-dependent denitrification was confirmed by laboratory incubation of bacterial consortia, derived from the laboratory-scale fluidized bed reactor and a pilot-plant fluidized bed reactor. Kinetic parameters of denitrification were determined as well as the stoichiometry of VFA uptake and nitrate reduction by these denitrifying consortia. It was concluded that in closed fish culture systems, where nitrate accumulates as a result of nitrification, complete nitrate removal is possible by a combination of denitrification and anaerobic degradation of endogenous organic matter.

Original languageAmerican English
Pages (from-to)21-32
Number of pages12
JournalAquaculture
Volume133
Issue number1
DOIs
StatePublished - 15 May 1995

Bibliographical note

Funding Information:
This work was supported by the German Ministry for Research and Development (BMFT) in the framework of the joint German-Israeli program on aquaculture( NCRD project AQ 1/ V/ 1060).

Keywords

  • Denitrification
  • Effluents, fish culture
  • Fats compounds
  • Nitrate removal
  • Techniques-anaerobic digestion, effluents
  • fatty compounds

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