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Vol 12, No 3 (2009)
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Treatment of low strength sewage with high suspended organic matter content in an anaerobic sequencing batch reactor and modeling application | Donoso-Bravo | Electronic Journal of Biotechnology
doi: 10.2225/vol12-issue3-fulltext-15
Electronic Journal of Biotechnology, Vol 12, No 3 (2009)

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

Andrés Donoso-Bravo, Marta Carballa, Gonzalo Ruiz Filippi, Rolando Chamy



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.




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ISSN:  0717-3458

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