Operation of an aerobic granular pilot scale SBR plant to treat swine slurry

N. Morales, M. Figueroa, A. Fra-Vázquez, A. Val Del Río, J. L. Campos, A. Mosquera-Corral, R. Méndez

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

A pilot-scale Sequencing Batch Reactor was operated during 307 days in order to treat swine slurry characterized by its high variable composition: organic and nitrogen applied loading rates and C/N ratio were 1.4-6.3 kg CODs/(m3 d), 0.5-2.5 kg N/(m3 d) and 1.9-9.4 g CODs/(g N), respectively. Aerobic granules successfully developed in the reactor and their physical properties remained rather stable despite the feeding composition variability. Organic and ammonia removal efficiency reached 61-73% and 56-77%, respectively, however ammonia was mainly oxidized to nitrite. The reactor had a good biomass retention capacity to select for granular biomass. However, its efficiency to retain the solids present in the feeding was low. Aerobic granulation in SBR systems appears as an interesting alternative to treat slurry in small livestock facilities where the implementation of anaerobic digestion systems is not a feasible option or the removal of nitrogenous compounds is required.

Original languageEnglish
Pages (from-to)1216-1221
Number of pages6
JournalProcess Biochemistry
Volume48
Issue number8
DOIs
StatePublished - Aug 2013
Externally publishedYes

Keywords

  • Aerobic granular sludge
  • COD
  • Nitrogen
  • Pilot plant reactor
  • Swine slurry

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