Abstract
This study evaluates the potential of bioconversion of crude glycerol, discharged from biodiesel production plant, to hydrogen (H 2) by an enriched microbial community. Microbial community was enriched from activated sludge in a medium amended with 2.5 g/L of crude glycerol. Optimal cultivation parameters for H 2 production such as initial pH, cultivation temperature and substrate concentration were investigated. H 2 yields from raw glycerol at optimal conditions (pH 6.5; 40°C and 1 g/L raw glycerol) were 1.1 ± 0.1 mol-H 2/mol-glycerol consumed. H 2 production was associated with acetate-butyrate type fermentation, along with ethanol as one of the end products. Kinetic experiments on H 2 production from pure and crude glycerol indicated the absence of any inhibitory effects from the impurities present in crude glycerol. The community analysis revealed that the enriched microbial consortium was dominated mainly by Clostridium species.
| Original language | English |
|---|---|
| Pages (from-to) | 12198-12204 |
| Number of pages | 7 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 37 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - Sept 2012 |
| MoE publication type | A1 Journal article-refereed |
Funding
The research was funded by the Maj and Tor Nessling Foundation (Project no: 2012356 ) and The Academy of Finland (Project no's. 126974 and 139830 ).
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
-
SDG 6 Clean Water and Sanitation -
SDG 7 Affordable and Clean Energy
Keywords
- Activated sludge
- Biodiesel
- Biohydrogen
- Crude glycerol
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