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Polyhydroxyalkanoates (PHAs): sustainable biopolyester production

机译:聚羟基链烷酸酯(PHA):可持续的生物聚酯生产

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Microbial polyhydroxyalkanoate (PHA) reserve polymers are interesting polyesters that can be sustainably produced by biotechnological means from a variety of renewable substrates. By feeding cosubstrates to selected cultures of prokaryotic microorganisms composition, structure and therefore physical properties of the PHAs can be influenced during their biotechnological production. Cheap substrates stemming from agricultural waste and surplus streams have to be used in order reduce product costs to a level similar to that of conventional plastics. Continuous production in combinations of a stirred tank reactor for microbial growth and a tubular plug flow reactor for PHA accumulation in the microbial biomass form the ideal production system. PHA is accumulated within the producing cells and has to be extracted. A system of chloroform, ethanol and water allows reusing the extracting solvent chloroform without prior redistillation.
机译:微生物聚羟基链烷酸酯(PHA)储备聚合物是有趣的聚酯,可以通过生物技术手段从各种可再生基材上可持续生产。通过将共底物喂入原核微生物的选定培养物中,可以在其生物技术生产过程中影响PHA的组成,结构以及因此的物理性质。为了将产品成本降低到与传统塑料相似的水平,必须使用源自农业废料和剩余物流的廉价基材。用于微生物生长的搅拌釜反应器和用于微生物生物质中PHA积累的管状活塞流反应器的连续生产形成了理想的生产系统。 PHA积累在生产细胞内,必须提取。氯仿,乙醇和水组成的系统无需重新蒸馏即可重新使用萃取溶剂氯仿。

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