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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of temperature at different organic loading levels on the performance of a fluidized-bed anaerobic sequencing batch bioreactor

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Author(s):
Bergamo, Camila Miranda [1] ; Di Monaco, Rodrigo [1] ; Ratusznei, Suzana Maria [1] ; Domingues Rodrigues, Jose Alberto [1] ; Zaiat, Marcelo [2] ; Foresti, Eugenio [2]
Total Authors: 6
Affiliation:
[1] Escola Engn Maua, IMT, BR-09580900 Sao Caetano do Sul, SP - Brazil
[2] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Hidraul & Saneamento, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CHEMICAL ENGINEERING AND PROCESSING; v. 48, n. 3, p. 789-796, MAR 2009.
Web of Science Citations: 19
Abstract

An investigation was performed on the effect of temperature and organic load on the stability and efficiency of a 1.8-L fluidized-bed anaerobic sequencing batch reactor (ASBR), containing granulated biomass. Assays were carried out employing superficial up How velocity of 7 m/h, total cycle length of 6 h and synthetic wastewater volume of 1.3 L per cycle. The fluidized-bed ASH was operated at 15, 20, 25 and 30 degrees C with influent organic matter concentrations of 500 and 1000 mgCOD/L The system showed stability under all conditions and presented filtered samples removal efficiency ranging from 79 to 86%. A first-order kinetic model could be fitted to the experimental values of the organic matter concentration profiles. The specific kinetic parameter values of this model ranged from 0.0435 to 0.2360 L/(gTVS h) at the implemented operation conditions. in addition, from the slope of an Arrhenius plot, the activation energy values were calculated to be 16,729 and 12,673 cal/mol for operation with 500 and 1000 mgCOD/L, respectively. These results show that treatment of synthetic wastewater. with concentration of 500 mgCOD/L, was more sensitive to temperature variations than treatment of the same residue with concentration of 1000 mgCOD/L. Comparing the activation energy value for operation at 500 mgCOD/L with the value obtained by Agibert et al. (S.A. Agibert, M.B. Moreira, S.M. Ratusznei, J.A.D. Rodrigues, M. Zaiat, E. Foresti. Influence of temperature on performance of an ASBBR with circulation applied to treatment of low-strength wastewater. journal of Applied Biochemistry and Biotechnology, 136 (2007) 193-206) in an ASBBR treating the same wastewater at the same concentration, the value obtained in the fluidized-bed ASBR showed to be superior, indicating that treatment of synthetic wastewater in a reactor containing granulated biomass was more sensitive to temperature variations than the treatment using immobilized biomass. (c) 2008 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 05/51702-9 - Development of combined systems of treatment of residuary waters aimed at removal of pollutants and recovery of energy and of products from the carbon, nitrogen and sulphur cycles
Grantee:Eugenio Foresti
Support Opportunities: Research Projects - Thematic Grants