Journal
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
Volume 33, Issue 1, Pages 21-31Publisher
BRAZILIAN SOC CHEMICAL ENG
DOI: 10.1590/0104-6632.20160331s00003520
Keywords
Aspergillus oryzae; Cellulase; Solid-state fermentation; Bioreactor; Respirometric analysis; Instrumentation; Amazon Forest
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Funding
- Embrapa
- CNPq
- Capes
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Bioprocess development studies concerning the production of cellulases are of crucial importance due to the significant impact of these enzymes on the economics of biomass conversion into fuels and chemicals. This work evaluates the effects of solid-state fermentation (SSF) operational conditions on cellulase production by a novel strain of Aspergillus oryzae using an instrumented lab-scale bioreactor equipped with an on-line automated monitoring and control system. The use of SSF cultivation under controlled conditions substantially improved cellulase production. Highest production of FPase (0.40 IU g(-1)), endoglucanase (123.64 IU g(-1)), and beta-glucosidase (18.32 IU g(-1)) was achieved at 28 degrees C, using an initial substrate moisture content of 70%, with an inlet air humidity of 80% and an airflow rate of 20 mL min(-1). Further studies of kinetic profiles and respirometric analyses were performed. The results showed that these data could be very useful for bioprocess development of cellulase production and scale-up.
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