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Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions
Published on: August 15, 2019
Anaerobic phenol biodegradation: kinetic study and microbial community shifts under high-concentration dynamic
Domenica Mosca Angelucci1, Elisa Clagnan2, Lorenzo Brusetti2
1Water Research Institute, C.N.R, Via Salaria km 29.300, CP 10, 00015, Monterotondo Stazione (Rome), Italy.
Anaerobic biodegradation of phenol in a sequencing batch reactor (SBR) achieved over 70% removal efficiency, even at high concentrations. Co-substrates like glucose showed negligible impact on performance, indicating robust phenol-degrading microbial communities.
Area of Science:
- Environmental microbiology
- Biotechnology
- Wastewater treatment
Background:
- Phenol is a common industrial pollutant.
- Anaerobic biodegradation offers a sustainable treatment method.
- Sequencing batch reactors (SBRs) are effective for wastewater treatment.
Purpose of the Study:
- To investigate anaerobic phenol biodegradation in an SBR.
- To acclimate a microbial consortium to high phenol loads.
- To evaluate the effect of co-substrates on biodegradation.
Main Methods:
- Utilized a sequencing batch reactor (SBR) under anaerobic conditions.
- Applied step-change increases in phenol loading for acclimation.
- Employed molecular tools for microbial community analysis.
Main Results:
- Achieved >70% phenol and COD removal efficiency at 2000 mg/L phenol.
- Co-substrate (glucose) showed no significant improvement in performance.
- No inhibition observed at phenol concentrations up to 1000 mg/L.
- Observed increased microbial richness, diversity, and selection of phenol-degrading genera.
Conclusions:
- SBRs are effective for high-strength anaerobic phenol removal.
- Acclimation strategies enhance specialized microbial consortia.
- Phenol-degrading bacteria can be enriched under high phenol loads.
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