Mathematical modeling of bio-hydrogen production from starch wastewater via up-flow anaerobic staged reactor

Mahmoud Nasr, Ahmed Tawfik, Masaaki Suzuki, Shinichi Ookawara

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7 Citations (Scopus)


Hydrogen production from starch wastewater industry via up-flow anaerobic staged reactor was investigated. The reactor was operated at an average organic loading rate of 13.17 ± 8.35 g COD/L d and hydraulic retention time of 8 h. The reactor achieved chemical oxygen demand (COD) and carbohydrate removal efficiencies of 84 and 92%, respectively. The total volatile fatty acids increased from 58.5 ± 30.0 (influent) to 235.6 ± 190.8 mg/L in the treated effluent, indicating that acidogenesis bacteria were dominant in the reactor. The system achieved maximum hydrogen production rate (HPR) and hydrogen yield of 2.48 L H2/d and 8.8 mL H2/g CODremoved, respectively. Simulated model tracks the experimental data with a correlation coefficient (R2 = 0.893). Maximum substrate utilization rate (μmax,s) and maximum volumetric HPR (μmax,h) were calculated at different food to micro-organisms (F/M) ratios of 0.15, 0.31, 0.46, 0.62, and 0.93 g COD/g VSS. Results showed that μmax,s increased to −0.76 g COD/L h at F/M ratio of 0.46, and then remained relatively constant at a value of −0.68 g COD/L h. Similar trends were observed for HPR, where it peaked (μmax,h of 93.89 mL H2/h) at F/M ratio of 0.46.

Original languageEnglish
Pages (from-to)50-58
Number of pages9
JournalDesalination and Water Treatment
Issue number1
Publication statusPublished - 3 Apr 2015
Externally publishedYes



  • Carbohydrate
  • COD
  • Hydrogen yield
  • Starch wastewater
  • Up-flow anaerobic staged reactor

ASJC Scopus subject areas

  • Pollution
  • Water Science and Technology
  • Ocean Engineering

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