| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308660 |
| ISSN: | 0104-6632 |
| Autores: | Silva, R.G1 Cruz, A.J.G Hokka, C.O Giordano, R.L.C Giordano, R.C |
| Instituciones: | 1Universidade Federal de Sao Carlos, Departamento de Engenharia Quimica, Sao Carlos, Sao Paulo. Brasil |
| Año: | 2000 |
| Periodo: | Dic |
| Volumen: | 17 |
| Número: | 4-7 |
| Paginación: | 587-598 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | At present, direct on-line measurements of key bioprocess variables as biomass, substrate and product concentrations is a difficult task. Many of the available hardware sensors are either expensive or lack reliability and robustness. To overcome this problem, indirect estimation techniques have been studied during the last decade. Inference algorithms rely either on phenomenological or on empirical models. Recently, hybrid models that combine these two approaches have received great attention. In this work, a hybrid neural network algorithm was applied to a fermentative process. Mass balance equations were coupled to a feedforward neural network (FNN). The FNN was used to estimate cellular growth and product formation rates, which are inserted into the mass balance equations. On-line data of cephalosporin C fed-batch fermentation were used. The measured variables employed by the inference algorithm were the contents of CO2 and O2 in the effluent gas. The fairly good results obtained encourage further studies to use this approach in the development of process control algorithms |
| Disciplinas: | Química |
| Palabras clave: | Fermentaciones, Química farmacéutica, Redes neuronales, Modelos híbridos, Cefalosporina C, Bioproducción, Inferencia de estado |
| Keyword: | Chemistry, Fermentation, Medicinal chemistry, Neural networks, Hybrid models, Cephalosporin C, Bioproduction, Inference of state |
| Texto completo: | Texto completo (Ver HTML) |
