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Factor optimization for phenol removal using activated carbon immobilized with Pseudomonas putida
Gurusamy Annadurai1, Ruey-Shin Juang, Duu-Jong Lee
1Department of Chemical Engineering, National Taiwan University, Taipei.
Summary
Pseudomonas putida efficiently removes phenol from water. Optimal removal occurred at pH 7, 30°C, with 0.6 g/l glucose and ammonium sulfate, showing inhibition at higher concentrations.
Area of Science:
- Environmental microbiology
- Bioremediation of pollutants
Background:
- Phenol is a common industrial pollutant in aqueous solutions.
- Effective bioremediation strategies are crucial for environmental protection.
Purpose of the Study:
- To optimize phenol removal efficiency using Pseudomonas putida.
- To investigate the impact of pH, temperature, glucose, and ammonium sulfate on phenol biodegradation.
Main Methods:
- Utilized suspended and immobilized Pseudomonas putida (ATCC 3180) cultures.
- Employed Box-Behnken design and polynomial regression for factor analysis.
- Assessed phenol removal efficiency under varying experimental conditions.
Main Results:
- Identified optimal conditions for phenol removal: pH 7, 30°C, 0.6 g/l glucose, and 0.6 g/l ammonium sulfate.
- Demonstrated significant interactions between operational parameters.
- Observed inhibition of phenol removal at carbon and nitrogen source concentrations exceeding 0.6 g/l.
Conclusions:
- Pseudomonas putida is effective for phenol bioremediation.
- Optimized conditions enhance removal efficiency.
- Careful control of nutrient concentrations is necessary to prevent inhibition.