Treatment of low strength sewage with high suspended organic matter content in an anaerobic sequencing batch reactor and modeling application

• Andrés Donoso-Bravo ^[1] ; Marta Carballa ^[1] ; Gonzalo Ruiz- Filippi ^[1] ; Rolando Chamy ^[1]
  1. [1] Pontificia Universidad Católica de Valparaíso

     Pontificia Universidad Católica de Valparaíso

     Valparaíso, Chile

     
• Localización: Electronic Journal of Biotechnology, ISSN-e 0717-3458, Vol. 12, Nº. 3, 2009, págs. 13-14
• Idioma: inglés
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• Resumen

  • In this work, an anaerobic sequencing batch reactor (ASBR) was operated for 8 months to treat low strength sewage with high suspended organic matter content. Three phases of operation with increasing organic loading rates (OLR) were performed: 0.4 kg COD/m³ x d (phase I), 0 .8 kg COD/m³ x d (phase II) and 1.2 kg COD/m³ x d (phase III). Adequate stability parameters (pH, total alkalinity) were obtained through all three experimental phases. During phases I and II, the removal efficiencies of organic matter (expressed as total chemical oxygen demand (COD) and total suspended solids ranged between 50-60%. However, these values decreased to 15-25% in phase III. In addition, a non-complex model, including hydrolysis, acidogenesis and methanogenesis, was applied to predict the reactor behavior.