| Full text | |
| Author(s): |
Casciatori, Fernanda Perpetua
[1]
;
Laurentino, Carmem Lucia
[1]
;
Leal da Costa, Karen Kristhine
[1]
;
Casciatori, Priscila Aparecida
[1]
;
Thomeo, Joao Claudio
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Estadual Paulista UNESP, Dept Engn & Tecnol Alimentos, Inst Biociencias Letras & Ciencias Exatas, BR-15054000 Sao Jose Do Rio Preto - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | JOURNAL OF FOOD PROCESS ENGINEERING; v. 36, n. 6, p. 803-810, DEC 2013. |
| Web of Science Citations: | 6 |
| Abstract | |
This contribution addresses the hygroscopic properties of orange pulp and peel (OPP), an agro-industrial by-product used for pectinase and phytase production by solid-state fermentation (SSF). Experiments were carried out using the static gravimetric method and the modified Halsey model best fitted to the experimental data. Bates and Watts curvature measurements, Box parameter bias estimation and residual analysis were performed in order to validate the model and the estimated parameters. Desorption experiments were also carried out and the results showed that drying took place even at high air relative humidity. The results presented are fundamental for water transfer modeling in SSF in fixed bed bioreactors. Practical ApplicationsThe current work addresses the hygroscopic properties of OPP, a solid waste rich in pectin, which can be used as substrate in SSF for the synthesis of pectinases and phytases. Thermal sorption isotherms (TSI) and water desorption kinetics (WDK) were investigated, both of the key information required for the fermentation process, either on simulation or in the laboratory. Usually, the moisture content of the solid phase in SSF is far above its moisture equilibrium content, and since the microbial metabolism is strongly affected by the moisture content, knowledge of TSI and WDK are mandatory. Experimental information was gathered and TSI nonlinear models were applied and special care was taken for the parameter estimation, applying specific tools to assess nonlinearity problems. The work therefore possesses significant new information, particularly interesting for engineers dealing with design and scaling-up of SSF bioreactors and with nonlinear regression estimation. (AU) | |
| FAPESP's process: | 12/13939-0 - Modeling of heat transfer and moisture migration in packed bed solid state fermentation bioreactors for fungal cellulase production using agro-industrial solid by-products |
| Grantee: | Fernanda Perpétua Casciatori |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| FAPESP's process: | 11/07453-5 - Fixed bed bioreactors to solid state fermentation: scale-up to cellullase fungal production |
| Grantee: | Fernanda Perpétua Casciatori |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 10/12624-0 - Application of physical-chemical and enzymatic methods in the saccharification of sugar cane bagasse: studies on microorganisms, fermentative processes and hydrolyses methods |
| Grantee: | Eleni Gomes |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 11/21239-6 - Production of cellulolytic enzymes associated and growth kinetics of fungi Trichoderma reesei and Thermoascus aurantiacus in solid state fermentation |
| Grantee: | Priscila Aparecida Casciatori |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |