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Start-up and operation of a fluidized-bed reactor oxidizing butyrate by a defined syntrophic population


Start-up and operation of a fluidized-bed reactor were investigated with butyrate or butyrate plus acetate as sole substrates. Start-up could be enhanced by increasing the amount of inoculum and by providing balanced substrate concentrations in a wellbuffered synthetic wastewater. High-rate degradation of butyrate to methane and carbon dioxide was achieved with a maximum organic loading rate (OLR) of 34.5 kg chemical oxygen demand (COD)/m3·d at a hydraulic retention time (HRT) of 0.47 d and with a COD removal efficiency of 87%.

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Zellner, G., Geveke, M. & Diekmann, H. Start-up and operation of a fluidized-bed reactor oxidizing butyrate by a defined syntrophic population. Biotechnol Lett 13, 687–691 (1991).

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  • Oxygen
  • Acetate
  • Methane
  • Wastewater
  • Dioxide