Effects of Heavy Metals and pH on the Conversion of Biomass to Hydrogen via Syngas Fermentation
Artikel i vetenskaplig tidskrift, 2018

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.

Heavy metals

pH

Gasification

Fermentative hydrogen

Syngas

Författare

Konstantinos Chandolias

Högskolan i Borås

Steven Wainaina

Högskolan i Borås

Claes Niklasson

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparatteknik

Mohammad J. Taherzadeh

Högskolan i Borås

BioResources

1930-2126 (ISSN)

Vol. 13 2 4455-4469

Ämneskategorier

Kemiska processer

Annan kemiteknik

Bioenergi

DOI

10.15376/biores.13.2.4455-4469

Mer information

Senast uppdaterat

2018-09-11