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Hybrid reactor for priority pollutant-trichloroethylene removal
1Centre for Environmental Science and Engineering, Indian Institute of Technology, Powai, Mumbai, 400076, India.
Water Research
|March 22, 2001
Summary
This study demonstrates a hybrid biological reactor effectively removes trichloroethylene (TCE) from wastewater. Optimized conditions achieved 99.99% TCE removal, highlighting its potential for environmental remediation.
Area of Science:
- Environmental Engineering
- Biotechnology
- Wastewater Treatment
Background:
- Trichloroethylene (TCE) is a persistent environmental pollutant.
- Effective biological treatment methods for TCE are crucial for remediation.
Purpose of the Study:
- To evaluate a hybrid biological reactor (trickling filter and activated sludge process) for TCE removal.
- To determine optimal operating conditions for maximum TCE degradation.
Main Methods:
- Biofilm acclimation to TCE over 55-60 days.
- Investigation of hydraulic retention time (HRT), C:N:P ratio, substrate:cosubstrate ratio, and pH.
- Monitoring of Chemical Oxygen Demand (COD) and TCE concentrations.
Main Results:
- Maximum TCE removal of 99.99% achieved at an HRT of 28 hours.
- Optimal C:N:P ratio of 100:20:1 and substrate:cosubstrate ratio of 100:1 identified.
- Optimum pH for degradation determined as 7.4 +/- 0.2.
- Biological removal efficiency calculated at 81.51% with 18.5% volatilization losses.
Conclusions:
- The hybrid TF-ASP reactor is highly effective for treating TCE-contaminated wastewater.
- Optimized operational parameters significantly enhance TCE removal efficiency.
- This approach offers a promising biological solution for recalcitrant organic pollutant removal.