The effect of the filling stage on the behavior of a mechanically stirred anaerobic sequencing batch reactor containing biomass immobilized on 1 cm polyurethane foam cubes was investigated. The reactor was made of acrylic with a capacity of 6.3 L, treating per cycle 2.5 L synthetic low-strength wastewater with a concentration of 500 mgCOD/L, at 30 ± 1°C. Eight-hour cycles (tC) and agitation of 500 rpm were utilized. At the beginning of each cycle 60% of the wastewater volume was treated, sufficient to completely cover the bed. The remaining volume was added at different fill times (tF) of 10, 120, 240, 260 and 480 min. The results obtained showed that ratios of tF/tC ≤ 0.5 enabled organic matter removal higher than 75% and 70% for filtered and non-filtered samples, respectively. Ratios of tF/tC > 0.5, despite operation stability, resulted in loss of efficiency and formation of viscous material, similar to extra-cellular polymeric substances.
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Research Article|
June 01 2004
Stirred anaerobic sequencing batch reactor containing immobilized biomass: a behavior study when submitted to different fill times
A.C. Borges;
A.C. Borges
*Departamento de Hidráulica e Saneamento, Escola de Engenharia de São Carlos, Universidade de São Paulo (USP), Av. Trabalhador São-Carlense 400, CEP 13.566-590, São Carlos-SP, Brasil
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R.R. Siman;
R.R. Siman
*Departamento de Hidráulica e Saneamento, Escola de Engenharia de São Carlos, Universidade de São Paulo (USP), Av. Trabalhador São-Carlense 400, CEP 13.566-590, São Carlos-SP, Brasil
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J.A.D. Rodrigues;
**Departamento de Engenharia Química e de Alimentos, Escola de Engenharia Mauá, Instituto Mauá de Tecnologia (IMT), Praça Mauá 1, CEP 09.580-900, São Caetano do Sul-SP, Brasil
E-mail: rodrigues@maua.br
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S.M. Ratusznei;
S.M. Ratusznei
**Departamento de Engenharia Química e de Alimentos, Escola de Engenharia Mauá, Instituto Mauá de Tecnologia (IMT), Praça Mauá 1, CEP 09.580-900, São Caetano do Sul-SP, Brasil
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M. Zaiat;
M. Zaiat
*Departamento de Hidráulica e Saneamento, Escola de Engenharia de São Carlos, Universidade de São Paulo (USP), Av. Trabalhador São-Carlense 400, CEP 13.566-590, São Carlos-SP, Brasil
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E. Foresti;
E. Foresti
*Departamento de Hidráulica e Saneamento, Escola de Engenharia de São Carlos, Universidade de São Paulo (USP), Av. Trabalhador São-Carlense 400, CEP 13.566-590, São Carlos-SP, Brasil
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W. Borzani
W. Borzani
**Departamento de Engenharia Química e de Alimentos, Escola de Engenharia Mauá, Instituto Mauá de Tecnologia (IMT), Praça Mauá 1, CEP 09.580-900, São Caetano do Sul-SP, Brasil
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Water Sci Technol (2004) 49 (11-12): 311–318.
Citation
A.C. Borges, R.R. Siman, J.A.D. Rodrigues, S.M. Ratusznei, M. Zaiat, E. Foresti, W. Borzani; Stirred anaerobic sequencing batch reactor containing immobilized biomass: a behavior study when submitted to different fill times. Water Sci Technol 1 June 2004; 49 (11-12): 311–318. doi: https://doi.org/10.2166/wst.2004.0869
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