English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This thesis is an exploration into the technical and economic issues related to a syngas fermenting biorefinery producing 50 metric tons per day of hydrogen gas and 12 metric tons per day of PHA, a biodegradable plastic. In addition, an optimization study on the bioreactor is performed by varying reactor diameter and stirring speed. The analysis assumed switchgrass costing $55/Mg as feedstock, and the bacterium Rhodospirillum rubrum to ferment the syngas. With a hydrogen market value of $1.90/kg assumed, 95% pure PHA was determined producible for approximately $2.05/kg. Grassroots capital for the biorefinery was estimated to be $55 million, with annual operating costs at $8.3 million. For a constant volumetric mass transfer coefficient of 0.05 s the optimum reactor size was a 14.8 m diameter being stirred at 0.6 rev/s. Producing PHA by this method was found to be less expensive than processes using sugar fermentation.

A techno-economic analysis of syngas fermentation for the production of hydrogen and polyhydroxyalkanoate