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Pretreatment in Vortex Layer Apparatus Boosts Dark Fermentative Hydrogen Production from Cheese Whey.
- Source :
- Fermentation (Basel); Dec2022, Vol. 8 Issue 12, p674, 17p
- Publication Year :
- 2022
-
Abstract
- Dark fermentation (DF) is a promising process for mitigating environmental pollution and producing "green" H<subscript>2</subscript>. However, wider implementation and scaling of this technology is hampered by insufficient process efficiency. In this work, for the first time, the effect of innovative pretreatment of cheese whey (CW) in a vortex layer apparatus (VLA) on characteristics and DF of CW was studied. Pretreatment in VLA resulted in a heating of the CW, slight increase in pH, volatile fatty acids, iron, and reduction in fat, sugar, and chemical oxygen demand (COD). The biochemical hydrogen potential test and analysis of H<subscript>2</subscript> production kinetics confirmed the significant potential of using VLA in enhancement of dark fermentative H<subscript>2</subscript> production. The maximum potential H<subscript>2</subscript> yield (202.4 mL H<subscript>2</subscript>/g COD or 3.4 mol H<subscript>2</subscript>/mol hexose) was obtained after pretreatment in VLA for 45 s and was 45.8% higher than the control. The maximum H<subscript>2</subscript> production rate after 5 and 45 s of pretreatment was 256.5 and 237.2 mL H<subscript>2</subscript>/g COD/d, respectively, which is 8.06 and 7.46 times higher than in the control. The lag phase was more than halved as a function of the pretreatment time. The pretreatment time positively correlated with the total final concentration of Fe<superscript>2+</superscript> and Fe<superscript>3+</superscript> and negatively with the lag phase, indicating a positive effect of pretreatment in VLA on the start of H<subscript>2</subscript> production. [ABSTRACT FROM AUTHOR]
- Subjects :
- WHEY
CHEESE
IRON
CHEMICAL oxygen demand
POLLUTION
FATTY acids
HYDROGEN production
Subjects
Details
- Language :
- English
- ISSN :
- 23115637
- Volume :
- 8
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Fermentation (Basel)
- Publication Type :
- Academic Journal
- Accession number :
- 160988580
- Full Text :
- https://doi.org/10.3390/fermentation8120674