Hydrogen production with immobilized sewage sludge in three-phase fluidized-bed bioreactors

Shu Yii Wu, Chi Num Lin, Jo-Shu Chang

研究成果: Article

112 引文 斯高帕斯(Scopus)

摘要

Municipal sewage sludge was immobilized with a modified alginate gel entrapment method, and the immobilized cells were used to produce hydrogen gas in a three-phase fluidized bed. The hydrogen-producing fluidized beds were operated at different liquid velocity (U0) and hydraulic retention time (HRT). The results show that in response to operating liquid velocities, the fluidized-bed system had three flow regimes, namely, plug flow, slug flow, and free bubbling. Pressure fluctuation analysis was used to analyze the hydrodynamic properties in this three-phase fluidized bed when it was under a steady-state production of biogas. With a steady-state biogas production rate (Ug) of 0.196 mL/s/L, a transition state occurred at a liquid velocity (U0) of 0.85 cm/s. As U0 < 0.85 cm/s, the system was basically a nonhomogeneous fluidized bed, whereas the bed became homogeneous when U0 was higher than 0.85 cm/s. The fluidized bed can be stably carried out at high loading rates (HRT as low as 2 h). Hydrogen fermentation results show that the maximal hydrogen production rate was 0.93 L/h/L and the best yield (YH2/sucrose) was 2.67 mol H2/mol sucrose.

原文English
頁(從 - 到)828-832
頁數5
期刊Biotechnology Progress
19
發行號3
DOIs
出版狀態Published - 2003 五月 1

    指紋

All Science Journal Classification (ASJC) codes

  • Biotechnology

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