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Biodegradation of phenol using the self-cycling fermentation (SCF) process.
1Department of Chemical Engineering, McGill University, 3480 University Street, Montreal, Quebec H3A 2A7, Canada.
Biotechnology and Bioengineering
|July 5, 1996
Summary
Self-cycling fermentation (SCF) effectively degrades phenol using Pseudomonas putida, achieving high substrate utilization rates. This stable and repeatable technique surpasses traditional methods in efficiency.
Area of Science:
- Environmental microbiology
- Biochemical engineering
- Bioremediation
Background:
- Phenol biodegradation is crucial for environmental protection.
- Traditional fermentation methods face limitations in efficiency and stability.
- Pseudomonas putida is a key microorganism for phenol degradation.
Purpose of the Study:
- To investigate the efficacy of self-cycling fermentation (SCF) for phenol biodegradation.
- To compare SCF performance against conventional bioreactor configurations.
- To develop and validate a mathematical model for the SCF process.
Main Methods:
- Utilized a stirred tank reactor for self-cycling fermentation.
- Employed Pseudomonas putida for phenol biodegradation.
- Expanded a mathematical model to incorporate substrate inhibition.
Main Results:
- Achieved stable and repeatable phenol biodegradation performance.
- Demonstrated complete substrate consumption under all tested conditions.
- Reported substrate utilization rates up to 14.5 kg/m³/day, exceeding batch, CSTR, and packed column fermentors.
- Validated the mathematical model against experimental data.
Conclusions:
- Self-cycling fermentation is a highly efficient and robust method for phenol biodegradation.
- SCF offers significant advantages over traditional bioreactor systems for phenol removal.
- The developed mathematical model accurately predicts SCF performance, including inhibitory effects.
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