PHA Recovery from Biomass
Citations Over TimeTop 10% of 2013 papers
Abstract
The recovery of polyhydroxyalkanoates (PHAs) from biomass, that is, from bacterial cells, is one of the major obstacles in the industrial production of these polyesters. Since PHAs are naturally synthesized as intracellular storage compounds for carbon and energy and are for this deposited in the cytoplasm of the bacterial cell, PHAs are more or less tightly linked with the entire biomass, and the polyesters must be released from the cells before their isolation and purification can be conducted. This additional step, that is, the release from the cells, is a major difference from most other biotechnological processes where the product occurs outside of the cells because it is secreted into the medium in a bioreactor or because it is synthesized in vitro in an enzyme reactor in a cell free system. This additional step contributes significantly to the overall costs of production. In this review we provide an overview about the different processes that result in the release of PHA from the cells, and we evaluate these processes with regard to the suitability at large scale in the industry.
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