Abstract Polyhydroxyalkanoates (PHAs) are biopolymers produced by many microorganisms under stressful conditions. In current years, PHAs are catching great industrial interest because of their physical and chemical properties similar to fossil plastics moreover they are biodegradable and biocompatible. In this research, two microorganisms, Cupriavidus necator DSM 545 and Hydrogenophaga pseudoflava DSM 1034 were cultivated on wine lees, deriving from Prosecco wine manufacturing. In specific conditions, bacteria were able to use wine lees as a carbon source and accumulate PHAs in their cytoplasm. Different growth conditions were provided to increase the PHAs production and valorize wine lees to the best possible extent.
Riassunto I poliidrossialcanoati (PHAs) sono biopolimeri prodotti da molti microrganismi in condizioni di stress. Negli ultimi anni, I PHAs stanno riscuotendo un notevole interesse industriale perchè hanno caratteristiche chimico-fisiche simili a quelle delle plastiche fossile ma sono biodegradabili e biocompatibili. In questo lavoro di tesi, Cupriavidus necator DSM 545 and Hydrogenophaga pseudoflava DSM 1034 sono stati coltivati su fecce che derivano dalla produzione del vino Prosecco. In condizioni specifiche, i batteri sono stati in grado di utilizzare le fecce come fonte di carbonio e accumulare PHAs nel loro citoplasma. Sono state utilizzate diverse condizioni di crescita per aumentare la produzione di PHAs e valorizzare al meglio questi residui.
Microbial production of Polyhydroxyalkanoates (PHAs) from wine lees as a carbon source
QAYAM, SHAMS ULLAH
2022/2023
Abstract
Abstract Polyhydroxyalkanoates (PHAs) are biopolymers produced by many microorganisms under stressful conditions. In current years, PHAs are catching great industrial interest because of their physical and chemical properties similar to fossil plastics moreover they are biodegradable and biocompatible. In this research, two microorganisms, Cupriavidus necator DSM 545 and Hydrogenophaga pseudoflava DSM 1034 were cultivated on wine lees, deriving from Prosecco wine manufacturing. In specific conditions, bacteria were able to use wine lees as a carbon source and accumulate PHAs in their cytoplasm. Different growth conditions were provided to increase the PHAs production and valorize wine lees to the best possible extent.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/49907