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Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
A kinetic approach to anaerobic hydrogen-producing process
Yang Mu1, Han-Qing Yu, Gang Wang
1Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
Water Research
|February 3, 2007
Summary
This study optimized hydrogen production from sucrose using a modified Gompertz model. Key factors like pH and temperature significantly influence microbial growth rates for efficient bioprocesses.
Area of Science:
- Biotechnology
- Microbiology
- Chemical Engineering
Background:
- Hydrogen is a key renewable energy source.
- Anaerobic fermentation offers a sustainable route for hydrogen production.
- Optimizing microbial kinetics is crucial for efficient bioprocesses.
Purpose of the Study:
- To investigate the kinetics of hydrogen production from sucrose using mixed anaerobic cultures.
- To modify the Gompertz model for describing microbial growth, substrate consumption, and product formation.
- To evaluate the effects of pH, temperature, and substrate-to-biomass ratio on microbial growth rate.
Main Methods:
- Utilized a modified Gompertz model to fit experimental data.
- Employed response-surface methodology to assess the impact of operational parameters.
- Determined optimal conditions for maximum specific microbial growth rate (μm).
Main Results:
- The modified Gompertz model accurately described the hydrogen production process.
- pH, temperature, and initial substrate-to-biomass ratio (S(0)/X(0)) significantly affected μm.
- Significant effects were observed for pH and the second-order interaction between pH and temperature.
Conclusions:
- Optimized conditions (pH 5.5, 34.6°C, S(0)/X(0) = 4.3g/g-VSS) yielded a maximum μm of 0.078 h⁻¹.
- Modeling microbial kinetics is essential for optimizing anaerobic hydrogen production.
- This research provides insights for enhancing biotechnical hydrogen generation efficiency.
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