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UID:20251014T092915EDT-0246fUaPzu@132.216.98.100
DTSTAMP:20251014T132915Z
DESCRIPTION:PhD Oral Defence of Karolin Dietrich\, Bioresource Engineering
 \n\nBiopolymers can provide environmentally friendly alternatives to the u
 se of fossil fuel derived polymers. Among the most promising\, yet expensi
 ve biopolymers are the microbiologically produced polyhydroxyalkanoates (P
 HAs)\, since they are compostable and also biodegrade in the marine enviro
 nment. To produce PHAs sustainably\, this work explores the feasibility of
  integrating the most well-known PHA\, polyhydroxybutyrate (PHB)\, into fo
 rest biorefineries using the bacterium Paraburkholderia sacchari. The firs
 t forest biorefinery scheme was based on the hydrolysis of softwood hemice
 llulose as a feedstock for PHB production. The softwood hemicellulose suga
 rs mannose and galactose were tested as carbon sources for P. sacchari for
  the first time and showed maximum specific growth rates of 97% and 60% re
 lative to glucose\, respectively. However\, the presence of inhibitory com
 pounds (acetate\, 5‑hydroxymethylfurfural\, furfural and phenols) inhibite
 d all bacterial growth. The second biorefinery scheme studied was based on
  a pilot plant process developed by FPInnovations using hardwood biomass. 
 In high-cell density bioreactor fermentations\, the wood hydrolysate affor
 ded one of the highest PHB concentrations to date from lignocellulosic bio
 mass. Similar to literature values of PHB\, the number average molecular m
 ass was 246.4 kDa with a PDI of 3.29. These results make PHB from hardwood
  hydrolysate\, as co‑product with H‑lignin\, a sustainable production sche
 me for industrial PHB production.\n\nEveryone in the 9IÖÆ×÷³§Ãâ·Ñ community is w
 elcome to attend a PhD Oral Defence. Please join us in celebrating the acc
 omplishments of our PhD candidates.\n
DTSTART:20200211T181500Z
DTEND:20200211T181500Z
LOCATION:MS2-022\, Macdonald-Stewart Building\, CA\, QC\, St Anne de Bellev
 ue\, H9X 3V9\, 21111 Lakeshore Road
SUMMARY:PhD Oral Defence: Sustainable polyhydroxybutyrate production in int
 egrated forest biorefineries
URL:/macdonald/channels/event/phd-oral-defence-sustain
 able-polyhydroxybutyrate-production-integrated-forest-biorefineries-320158
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