Bio-hydrogen production from acid hydrolyzed wheat starch by photo-fermentation using different Rhodobacter sp


Kapdan İ., Kargi F., Oztekin R., Argun H.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.34, sa.5, ss.2201-2207, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 5
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.ijhydene.2009.01.017
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2201-2207
  • Anahtar Kelimeler: Bio-hydrogen, Hydrolyzed wheat starch, Photo-fermentation, Rhodobacter sp, TOFU WASTE-WATER, DARK FERMENTATION, BUTYRATE CONCENTRATION, SPHAEROIDES, COCULTURES, ACETATE
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Hydrogen gas production from sugar solution derived from acid hydrolysis of ground wheat starch by photo-fermentation was investigated. Three different pure strains of Rhodobacter sphaeroides (RV, NRLL and DSZM) were used in batch experiments to select the most suitable strain. The ground wheat was hydrolyzed in acid solution at pH = 3 and 90 degrees C in an autoclave for 15 min. The resulting sugar solution was used for hydrogen production by photo-fermentation after neutralization and nutrient addition. R. sphaeroides RV resulted in the highest cumulative hydrogen gas formation (178 ml), hydrogen yield (1.23 mol H-2 mol(-1) glucose) and specific hydrogen production rate (46 ml H-2 g(-1) biomass h(-1)) at 5 g l(-1) initial total sugar concentration among the other pure cultures. Effects of initial sugar concentration on photo-fermentation performance were investigated by varying sugar concentration between 2.2 and 13 g l(-1) using the pure culture of R. sphaeroides RV. Cumulative hydrogen volume increased from 30 to 232 ml when total sugar concentration was increased from 2.2 to 8.5 g l(-1). Further increases in initial sugar concentration resulted in decreases in cumulative hydrogen formation. The highest hydrogen formation rate (3.69 ml h(-1)) and yield (1.23 mol H-2 mol(-1) glucose) were obtained at a sugar concentration of 5 g l(-1). (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.