Stability of aerobic granular biomass treating the effluent from a seafood industry

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

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The aerobic granular systems represent a good alternative to substitute the conventional activated sludge process in the treatment of industrial effluents due to the lower surface requirements. In this work the effluent from a seafood industry, characterized by a high variability and the presence of residual amounts of coagulant and flocculant reagents, was used to study the development of aerobic granular biomass and its stability. In a first stage with OLRs between 2 and 5 kg CODS/m3·d the development of aerobic granular biomass was promoted with good physical properties: SVI of 35 mL/g TSS, density of 60 g VSS/Lgranule and average diameter of 2.8 mm. In a second stage the continuous change in the OLR applied from 3 to 13 kg CODS/m3·d, to simulate the real conditions of the industry, showed that the removal of organic matter was not affected (90%) but the aerobic granules disintegrated. The maximum OLR treated in the system without granules disintegration was around 4.4 kg CODS/m3·d. The nitrogen removal was 30% (for biomass assimilation) and the maximum ammonia removal was around 65% and depending on the solids retention time, the free ammonia concentration and the average granule diameter.

Original languageEnglish
Pages (from-to)265-276
Number of pages12
JournalInternational Journal of Environmental Research
Volume7
Issue number2
StatePublished - 2013
Externally publishedYes

Keywords

  • Aerobic granule
  • Bioreactor
  • Industrial wastewater
  • Nitrogen
  • Organic matter

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