Hydrodynamic characteristics and model of fluidized bed reactor with immobilised cells on activated carbon for biohydrogen production

Nur Syakina Jamali, Jamaliah Md Jahim, Sompong O-Thong, Aminee Jehlee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A mathematical model of minimum fluidization velocity (U mf ) was developed based on the hydrodynamic characteristics of the fluidized bed reactors (FBR) with immobilised cells attached to activated carbon at thermophilic biohydrogen fermentation. The maximum hydrogen productivity rate of 7.8 mmolH 2 /L.h and hydrogen yield of 2.2 molH 2 /mol of sugar consumed was obtained when the HRT was shortened from 48 h to 6 h. The presence of the immobilised cells enriched the biomass composition in the FBR from 4.9 to 7.1 g VSS/L and maximum energy generated was 58.7 KJ H 2 /L.d. The FBR had to be operated at a high U mf of 0.05–0.44 cm/s and a low terminal velocity of 2.11 cm/s to prevent the immobilised cells from washed out from the FBR, hence achieved an adequate fluidization system. A screening of the microbial population by DGGE revealed that the T. thermosaccharolyticum sp. was dominant for all the HRTs, thereby indicating that this bacterium is resilient towards environmental disturbances.

Original languageEnglish
Pages (from-to)9256-9271
Number of pages16
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number18
DOIs
Publication statusPublished - 5 Apr 2019

Fingerprint

activated carbon
Activated carbon
Fluidized beds
beds
Hydrodynamics
hydrodynamics
reactors
Cells
Fluidization
cells
terminal velocity
Hydrogen
fermentation
hydrogen
biomass
sugars
productivity
Sugars
Fermentation
bacteria

Keywords

  • Biohydrogen production
  • Fluidized bed reactor
  • Hydrodynamic characteristics
  • Immobilised cells
  • Minimum fluidization velocity
  • Terminal velocity

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Hydrodynamic characteristics and model of fluidized bed reactor with immobilised cells on activated carbon for biohydrogen production. / Jamali, Nur Syakina; Md Jahim, Jamaliah; O-Thong, Sompong; Jehlee, Aminee.

In: International Journal of Hydrogen Energy, Vol. 44, No. 18, 05.04.2019, p. 9256-9271.

Research output: Contribution to journalArticle

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