mÉtodos de extraÇÃo de poli-hidroxialcanoatos a partir de biomassa bacteriana
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ID: 176185
2015
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Abstract
Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible polyesters intracellularly accumulated by many bacteria as an energy reserve material and carbon source. These biopolymers may be extracted from cells after their production phase, and the extraction process involves various individual operations to ensure adequate removal of the biopolymer from the cells. During this process, the following aspects should be considered: reduction of product losses during different stages of the process to obtain a highly pure product, preservation of physical and thermal characteristics, and use of low toxicity chemicals to achieve sustainable production and avoid harming the environment. The impact of the costs of PHA extraction on the total cost of the production process may account for over 50% of the end-value of the product. Within this context, several methods of PHA extraction have been reported in the literature. These methods include the use of solvents, chemical digestion, enzymatic digestion, mechanical extraction with high-pressure homogenization and ultrasound, extraction using supercritical fluids, or a combination of these methods. The present review of the literature shows strategies for extraction processes of PHAs produced by bacteria involving cell destabilization and/or breakage, recovery, and purification of the biopolymer.
| Reference Key |
quines2015qumicamtodos
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|---|---|
| Authors | ;Luci K. M. Quines;Mélodi Schmidt;Kellen Zanfonato;Willibaldo Schmidell;Gláucia M. F. Aragão |
| Journal | greece and rome |
| Year | 2015 |
| DOI |
10.5935/0100-4042.20150129
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| URL | |
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