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Thermal Treatment Improves a Process of Crude Glycerol Valorization for the Production of a Heterologous Enzyme by

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Specialty Biotechnology
Date 2021 Jul 5
PMID 34221911
Citations 6
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Abstract

Valorization of crude glycerol requires a potent bifunctional biocatalyst, such as , capable of high-density growth on this substrate, and having high propensity for heterologous protein synthesis. Increasing evidence suggests that controlled administration of stress, thermal treatment, has a positive impact on bioprocess performance. In this study, we systematically adjusted thermal treatment conditions (20 to 42 °C) in order to maximize heterologous protein production by growing in crude glycerol-based medium. Our results showed nearly 30% enhancement in the enzyme production triggered by temporary exposure to decreased temperature. Here developed mathematical model indicated optimal treatment conditions (20 °C, 153') that were later applied to a process with biodiesel-derived glycerol and technical substrates. Techno-economic analysis of a pilot-scale-waste-free process was conducted. Quantitative description of the associated costs and economic gain due to exploitation of industrial substrates, as well as indication of current bottlenecks of the process, are also provided.

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