Treatment of saline wastewater in SBR aerobic granular reactors

M. Figueroa, A. Mosquera-Corral, J. L. Campos, R. Méndez

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97 Scopus citations

Abstract

Fish canning effluents characterized by their salt content, up to 30 g NaCI/L, were treated, previously diluted to desired concentration, in a SBR where aerobic granular sludge was produced. The formation of mature aerobic granules occurred after 75 days of operation with 3.4mm of diameter, SVI of 30 mL/g VSS and density around 60 g VSS/L-granule. Treated organic loading rates were up to 1.72 kg COD/(m3·d) with fully organic matter depletion. Ammonia nitrogen was removed via nitrification-denitrification up to 40% when nitrogen loading rates were of 0.18 kg N/(m2·d). The presence of salt in the treated effluent did not cause a detrimental effect on the operation of the reactor once the aerobic granules were formed.

Original languageEnglish
Pages (from-to)479-485
Number of pages7
JournalWater Science and Technology
Volume58
Issue number2
DOIs
StatePublished - 2008
Externally publishedYes

Keywords

  • Aerobic granulation
  • Fisheries
  • Nitrification
  • SBR
  • Salt

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