Effects of Heavy Metals and pH on the Conversion of Biomass to Hydrogen via Syngas Fermentation

Chandolias, Konstantinos, 1985- (author): Högskolan i Borås,Akademin för textil, teknik och ekonomi,University of Borås,Biotechnology

Wainaina, Steven (author): Högskolan i Borås,University of Borås,Biotechnology

Niklasson, Claes, 1957 (author): Chalmers Technical University,Chalmers tekniska högskola,Chalmers University of Technology

Taherzadeh, Mohammad J, 1965- (author): Högskolan i Borås,Akademin för textil, teknik och ekonomi,University of Borås,Biotechnology

(creator_code:org_t)

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Abstract Subject headings

The effects of three heavy metals on hydrogen production via syngas fermentation were investigated within a metal concentration range of 0 to 1.5 mg Cu/L, 0 to 9 mg Zn/L, 0 to 42 mg Mn/L, in media with initial pH of 5, 6, and 7, at 55 degrees C. The results showed that at lower metal concentration, pH 6 was optimum while at higher metal concentrations, pH 5 stimulated the process. More specifically, the highest hydrogen production activity recorded was 155% +/- 12% at a metal concentration of 0.04 mg Cu/L, 0.25 mg Zn/L, and 1.06 mg Mn/L and an initial medium pH of 6. At higher metal concentration (0.625 mg Cu/L, 3.75 mg Zn/L, and 17.5 mg Mn/L), only pH 5 was stimulating for the cells. The results showed that the addition of heavy metals, contained in gasification-derived ash, can improve the production rate and yield of fermentative hydrogen. This could lead to lower costs in gasification process and fermentative hydrogen production and less demand for syngas cleaning before syngas fermentation.

TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Bioenergi (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bioenergy (hsv//eng)

By the author/editor: Chandolias, Kons ...; Wainaina, Steven; Niklasson, Claes ...; Taherzadeh, Moha ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Chemical Process ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Other Chemical E ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Industrial Biote ...; and Bioenergy

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