Hydrogen gas production from waste paper by dark fermentation: Effects of initial substrate and biomass concentrations


EKER S., Sarp M.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.42, sa.4, ss.2562-2568, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 4
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.ijhydene.2016.04.020
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2562-2568
  • Anahtar Kelimeler: Bio-hydrogen, Dark fermentation, Waste paper, BIOHYDROGEN PRODUCTION PROCESSES, HYDROLYZED WHEAT-STARCH, PHOTO-FERMENTATION, GROUND WHEAT, PICHIA-STIPITIS, PRETREATMENT, ACID, ETHANOL, SUGARS, PULP
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In this study, waste paper was used as the raw material for hydrogen gas production by dark fermentation at different initial substrate and cell concentrations. Glucose obtained from acid hydrolyzed waste paper was used at six different concentrations between 3.84 and 45.5 gl.(-1) to determine the effects of sugar concentration on bio-hydrogen production. The highest cumulative hydrogen gas was obtained at 18.9 gL(-1) initial sugar concentration. Sugar concentrations above 18.9 gL(-1) resulted in product inhibition. Similarly, the initial biomass concentration was varied between 0.25 and 2 gL(-1) while sugar concentration was kept constant at 18.58 +/- 2.45 gL(-1) to determine the effects of initial biomass concentration. The highest cumulative hydrogen gas production was obtained with the initial biomass concentration of 0.5 gL(-1). The highest hydrogen yield (140 ml H-2 ri total sugar) was observed at 3.84 gL(-1) total sugar concentration. Hydrogen yield decreased with increasing initial sugar concentration due to inhibition by volatile fatty acids (VFAs) produced by dark fermentation and furan derivatives produced from acid hydrolysis of waste paper. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.