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Bioprocess and Biosystems Engineering

, Volume 41, Issue 8, pp 1115–1120 | Cite as

Effects of intermittent aeration periods on a structured-bed reactor continuously fed on the post-treatment of sewage anaerobic effluent

  • Bruno Garcia Silva
  • Márcia Helena Rissato Zamariolli Damianovic
  • Eugenio Foresti
Research Paper
  • 139 Downloads

Abstract

This study assessed the simultaneous nitrification and denitrification processes and remaining organic matter removal from anaerobic reactor effluent treating wastewater in a single reactor. A structured-bed reactor, with polyurethane foam as support media, was subjected to intermittent aeration and effluent recirculation. Aerated/non-aerated periods varied in the range of 2/1–1/3 h. The chemical oxygen demand (COD) in the effluent remained between 26 and 42 mg L−1 throughout all the aeration conditions. Aeration periods of 1/2 h removed 80 and 26% of Total Kjeldahl Nitrogen and Total Nitrogen, respectively. A low solid production was observed during the 300 days of operation, resulting in a solid retention time of 139 days. The results indicate that the non-aerated periods generated alkalinity that favored nitrification, maintaining low COD concentrations in the effluent. The structured bed reactor presented a low solid production and effluent loss below 20 mgSSV L−1, similar to concentrations obtained in secondary decanters.

Keywords

Sewage Anaerobic effluent Fixed bed reactor Intermittent aeration SND 

Notes

Acknowledgements

This study was supported by FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo, Brasil) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brasil).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Bruno Garcia Silva
    • 1
  • Márcia Helena Rissato Zamariolli Damianovic
    • 1
  • Eugenio Foresti
    • 1
  1. 1.Biological Processes Laboratory, São Carlos School of Engineering (EESC)University of São Paulo (USP)São CarlosBrazil

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