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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 12, No. 3, 2009
Bioline Code: ej09035
Full paper language: English
Document type: Short Communication
Document available free of charge

Electronic Journal of Biotechnology, Vol. 12, No. 3, 2009

 en Treatment of low strength sewage with high suspended organic matter content in an anaerobic sequencing batch reactor and modeling application
Donoso-Bravo, A.; Carballa, M.; Ruiz-Filippi, G. & Chamy, R.

Abstract

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.

Keywords
acidogenesis, anaerobic treatment, hydrolysis, low strength wastewater, modeling.

 
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