Production of methyl oleate by direct addition of fermented solid Penicillium sumatrense and Aspergillus fumigatus
| Autor: | Gustavo Frensch, André Bellin Mariano, Anne Caroline Defranceschi Oliveira, José Viriato Coelho Vargas, Maria Luiza Fernandes Rodrigues, Francisco A. Marques |
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| Rok vydání: | 2020 |
| Předmět: |
060102 archaeology
biology Immobilized enzyme Renewable Energy Sustainability and the Environment Chemistry 020209 energy Extraction (chemistry) Substrate (chemistry) 06 humanities and the arts 02 engineering and technology biology.organism_classification Aspergillus fumigatus Oleic acid chemistry.chemical_compound Hydrolysis 0202 electrical engineering electronic engineering information engineering 0601 history and archaeology Fermentation Food science Penicillium sumatrense |
| Zdroj: | Renewable Energy. 162:1132-1139 |
| ISSN: | 0960-1481 |
| Popis: | This work objective was to use different lipases in the methyl oleate synthesis. Endophytic fungi strains of Penicillium sumatrense and Aspergillus fumigatus were isolated from castor leaves (Ricinus communis L.) in order to acquire lipases through solid-state fermentation, using sunflower seeds as substrate. Following this, the fermented solid went through the process of obtaining the crude extract, drying or immobilization. From the enzymatic preparations, esterification reactions were performed, using oleic acid as a substrate. The enzyme immobilization and extraction resulted in loss of hydrolytic activity and reduction of esterification efficiency, showing about 70–80% of maximum conversion in 12 h of reaction. The fermented solid showed 90% conversion after 8 h reaction and after conditions optimization, it resulted in 100% conversion. The produced enzymes presented themselves to be suitable for reutilization, the A. fumigatus enzyme showed a half-life of 14 reuse cycles. The fermented solid addition have some advantages when compared to others enzymatic preparations such as lower activity loss, reduced obtainment costs and possibility for reutilization. |
| Databáze: | OpenAIRE |
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