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Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions
Published on: August 15, 2019
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Catechol biodegradation by a novel hybrid anoxic biofilter
Hassan Khorsandi1, Mehri Gholizadeh1, Ali Ahmad Aghapour1
1Department of Environmental Health Engineering, Urmia University of Medical Sciences, Urmia, Iran.
Environmental Technology
|August 11, 2018
Summary
This study demonstrates effective simultaneous catechol biodegradation and nitrate removal using a hybrid anoxic biofilter (HAB). The process achieves high pollutant removal efficiency, offering a sustainable wastewater treatment solution.
Area of Science:
- Environmental Science
- Biotechnology
- Water Treatment
Background:
- Aromatic compounds like catechol are common industrial pollutants.
- Nitrate contamination in water bodies poses significant environmental risks.
- Simultaneous removal of organic pollutants and nitrate is crucial for effective wastewater treatment.
Purpose of the Study:
- To investigate the efficacy of a hybrid anoxic biofilter (HAB) for simultaneous catechol biodegradation and nitrate removal.
- To determine the optimal operating conditions for the HAB process.
- To evaluate the effluent quality, particularly turbidity, produced by the HAB.
Main Methods:
- Utilized a hybrid anoxic biofilter (HAB) for treating synthetic wastewater containing catechol and nitrate.
- Varied catechol and nitrate concentrations, and hydraulic retention time to find optimal conditions.
- Monitored catechol biodegradation, nitrate removal, organic loading rate, COD/N ratio, and effluent turbidity.
Main Results:
- Achieved simultaneous catechol biodegradation and nitrate removal in the HAB.
- Determined optimal conditions at 750 mg/L catechol, 140 mg/L-N nitrate, and 18-hour hydraulic retention time.
- Maximum catechol biodegradation concentration reached 1,000 mg/L.
- Produced effluent with low turbidity (0.8 ± 0.5 NTU) without secondary sedimentation.
Conclusions:
- The HAB process is highly efficient for treating wastewater with high concentrations of aromatic compounds and nitrate under anoxic conditions.
- The HAB technology offers a cost-effective and environmentally compliant solution for wastewater discharge.
- The process minimizes the need for additional treatment steps like secondary sedimentation, reducing operational complexity.
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