| Texto completo | |
| Autor(es): |
de Carvalho, Jessica Xavier
;
do Couto, Pamela Talita
;
Zaiat, Marcelo
;
Ribeiro, Rogers
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ENVIRONMENTAL ENGINEERING; v. 151, n. 11, p. 10-pg., 2025-11-01. |
| Resumo | |
Modeling the anaerobic digestion of wastewater containing sulfate is important for understanding and optimizing the process, enabling the prediction of operational conditions in reactors to maximize sulfate removal. The goal of this work was to develop an extension of the Anaerobic Digestion Model No. 1 (ADM1) for the sulfate reduction process using ethanol as an electron donor and source of organic matter. A pilot-scale anaerobic sequencing batch biofilm reactor (ASBBR) was operated with a chemical oxygen demand (COD)/sulfate ratio (M/M) close to 2.0, using industrial wastewater with an initial sulfate concentration of 1.45 g L-1 for model calibration and 2.30 g L-1 for validation. The free parameters values, which are the initial biomass concentrations in the reactor, were determined using the Box-Draper minimization method and Markov-chain Monte Carlo (MCMC) simulation until convergence was obtained, assisted by the Geweke test. In both the calibration and simple validation, the model fitted properly the experimental data for ethanol and sulfate consumption, as well as the production and consumption of acetic acid by the microorganisms. Concerning COD, the simulated results differed slightly from real values, mainly during calibration. The sum of the average biomass concentrations (Xac0, XaSRB0, Xeth0, XethSRB0, Xh20, and XhSRB0) obtained by model closely matched the value measured. Statistical analysis supports the validity and robustness of the model in representing the experimental data. (AU) | |
| Processo FAPESP: | 21/01657-0 - Modelagem, simulação e otimização de reatores anaeróbios acidogênicos com regime de operação contínuo e escoamento pistonado |
| Beneficiário: | Pamela Talita do Couto |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 22/10615-1 - Consolidação do conceito de biorrefinaria aplicado ao tratamento biológico de águas residuárias e de resíduos sólidos |
| Beneficiário: | Marcelo Zaiat |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |