ASBR Applied to the Treatment of Biodiesel Production Effluent: Effect of Organic Load and Fill Time on Performance and Methane Production |
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| Authors: | Vivian C. Selma Luís H. B. Cotrim José A. D. Rodrigues Suzana M. Ratusznei Marcelo Zaiat Eugenio Foresti |
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| Affiliation: | (1) Escola de Engenharia Mau?–Instituto Mau? de Tecnologia (EEM/IMT), Pra?a Mau? 1; CEP 09.580-900, S?o Caetano do Sul, S?o Paulo, Brazil;(2) Departamento de Hidr?ulica e Saneamento, Escola de Engenharia de S?o Carlos–Universidade de S?o Paulo (SHS/EESC/USP), Av. Trabalhador S?o-Carlense 400; CEP 13.566-590, S?o Carlos, S?o Paulo, Brazil; |
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| Abstract: | The effect of organic matter and fill time on anaerobic sequencing batch reactor (5 L, 30°C, 8-h cycles, 50 rpm) efficiency has been analyzed. Organic matter was increased by the influent concentration. Fill times investigated were in the batch mode and fed-batch followed by batch. In the batch mode organic matter removal were 93%, 81%, and 66% for influent concentration of 500, 1,000, and 2,000 mgCOD/L (0.6, 1.29, and 2.44 gCOD/L.d), respectively. At 3,000 mgCOD/L (3.82 gCOD/L.d) operational stability could not be achieved. Removal efficiency was improved by increasing the fill time, and was 85% for the 1,000 mgCOD/L condition and fill times of 2 and 4 h, and 80 and 77% for the 2,000 mgCOD/L condition and fill times of 2 and 4 h, respectively. Hence, gradual feeding seemed to improve and to smooth the profiles of organic matter and volatile acids along the cycle with 78 to 96 NmLCH4/gCOD. |
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