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Effect of heavy metals on syngas fermentation
University of Borås, Faculty of Textiles, Engineering and Business.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The goal of this work was to establish the suitable and limiting concentrations of Zn, Cu and Mn compounds during syngas fermentation. The results showed that cells encased in polyvinylidene difluoride (PVDF) membranes had a faster accumulation of methane in reactors containing fermentation medium dosed with 5 mg/L of each heavy metal compared to free cells. It was also revealed that total inhibition of biohydrogen production occurred in medium containing 5 mg/L Cu, 30 mg/L Zn and 140 mg/L Mn while the most suitable metal concentration level was 0.1 mg/L Cu, 0.6 mg/L and 2.8 mg/L Mn. In addition, a comparison test showed that for the most suitable metal concentration in the medium, rate of performance at pH 6 and 7 was higher than at pH 5.

Place, publisher, year, edition, pages
Keyword [en]
Syngas biomethanation, biological water-gas-shift, heavy metals
National Category
Engineering and Technology
URN: urn:nbn:se:hb:diva-10203OAI: diva2:943073
Subject / course
Resource Recovery
Available from: 2016-08-04 Created: 2016-06-27 Last updated: 2016-08-04Bibliographically approved

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