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Denitrifying sulfide removal by enriched microbial consortium: kinetic diagram
Duu-Jong Lee1, Biing-Teo Wong2
1Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Bioresource Technology
|May 31, 2014
Summary
This study developed a new kinetic diagram to understand the Denitrifying Sulfide Removal (DSR) process. The diagram helps assess DSR system performance by analyzing mass and electron balances for efficient nitrate and sulfide removal.
Area of Science:
- Environmental microbiology
- Biogeochemical cycles
- Wastewater treatment
Background:
- The Denitrifying Sulfide Removal (DSR) process offers simultaneous removal of nitrate, sulfide, and organic matter in a single reactor.
- Understanding the stoichiometry and kinetics of DSR under various metabolic modes (autotrophic, heterotrophic, mixotrophic) is crucial for process optimization.
- Existing kinetic models may not fully capture the complex interactions within DSR systems.
Purpose of the Study:
- To isolate and characterize Denitrifying Sulfide Removal (DSR) bacteria.
- To elucidate the stoichiometry and kinetics of autotrophic, heterotrophic, and mixotrophic DSR.
- To develop a novel graphical method for interpreting DSR system kinetics and performance.
Main Methods:
- Isolation of eight DSR bacterial strains.
- Construction of a microbial consortium for DSR experiments.
- Application of mass and electron balance principles.
- Development of a novel kinetic diagram.
Main Results:
- Successful isolation of eight DSR strains and formation of a functional consortium.
- Characterization of DSR stoichiometry and kinetics under different denitrification modes.
- Proposal of a new kinetic diagram based on mass and electron balances.
- Demonstration of the diagram's utility in assessing DSR system performance.
Conclusions:
- The proposed kinetic diagram provides a powerful graphical tool for interpreting DSR system kinetics.
- The diagram facilitates the identification of operational regimes where DSR reactions are feasible.
- This approach simplifies the assessment of DSR system performance, aiding in process design and management.
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