Optimization of photo-hydrogen production based on cheese whey spent medium

Cheese whey wastewater diluted to 10 g lactose/L was initially subjected to dark-fermentation by Enterobacter aerogenes MTCC 2822, and the VFAs-rich spent medium (acetic acid 1900 mg/L, butyric acid 537 mg/L, and traces of propionic acid) was subjected to photo-fermentation through enrichment by Ni...

Full description

Saved in:
Bibliographic Details
Published inInternational journal of hydrogen energy Vol. 39; no. 14; pp. 7597 - 7603
Main Authors RAI, Pankaj K, ASTHANA, R. K, SINGH, S. P
Format Conference Proceeding Journal Article
LanguageEnglish
Published Kidlington Elsevier 05.05.2014
Subjects
Alternative fuels. Production and utilization
Applied sciences
Butyric acid
Cheese
Control
Energy
Exact sciences and technology
Fuels
Hydrogen
Hydrogen-based energy
Optimization
Propionic acid
Waste water
Whey
Rhodopseudomonas
Hydrogen
Rhodospirillaceae
Fermentation
Whey
Optimization
VFA
Rhodospirillales
Enterobacter
Bacteria
Rhodospirillineae
Hydrogen production
Enterobacteriaceae
Online AccessGet full text

Cover

More Information
Summary:Cheese whey wastewater diluted to 10 g lactose/L was initially subjected to dark-fermentation by Enterobacter aerogenes MTCC 2822, and the VFAs-rich spent medium (acetic acid 1900 mg/L, butyric acid 537 mg/L, and traces of propionic acid) was subjected to photo-fermentation through enrichment by Ni super(2+) (0-8 mu mol/L), Fe super(2+) (0-100 mu mol/L) or Mg super(2+) (0-15 mmol/L) in batch mode by Rhodopseudomonas BHU 01 strain. The maximum cumulative H sub(2) production (144 ml) and yield (58 mmol) was obtained at 4 mu mol Ni super(2+)/L. Likewise, Fe super(2+) (60 mu mol/L) resulted in maximum cumulative H sub(2) production (139 ml) and yield (56 mmol). Nevertheless, 6 mmol of Mg super(2+) did not significantly affect H sub(2) production (110 ml) or yield (44 mmol); the latter value in close proximity with the control (37 mmol). The concomitant reduction in COD was maximum (15.61%) for 4 mu mol Ni super(2+)/L, followed by 15.33% for 60 mu mol Fe super(2+)/L, and the least for 6 mmol Mg super(2+)/L (14.5%). The observations suggest the role of Fe super(2+) and Ni super(2+) in regulation of nitrogenase and hydrogenase, while that of Mg super(2+) mainly in the biosynthesis of photopigment bacteriochlorophyll (Bchl).
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2013.09.011