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Biofiltration of ketone compounds by a composite bead biofilter
Wu-Chung Chan1, Kang-Hong Peng
1Civil Engineering Department, Chung-Hua University, Hsinchu 30067, Taiwan, ROC. wcchan@chu.edu.tw <wcchan@chu.edu.tw>
Bioresource Technology
|August 3, 2007
Summary
This study investigated ketone biodegradation in biofilters, finding that higher concentrations inhibit microbial growth and reaction rates. Acetone showed the least inhibition in growth at lower concentrations, while MEK was most inhibited in reactions.
Area of Science:
- Biochemical Engineering
- Environmental Biotechnology
- Environmental Science
Background:
- Ketone compounds are common industrial pollutants.
- Biofilters offer a sustainable method for treating volatile organic compounds (VOCs).
- Understanding kinetic behaviors is crucial for optimizing biofilter performance.
Purpose of the Study:
- To investigate the biochemical kinetic behaviors of ketone compounds (acetone, MEK, MIPK) in a composite bead biofilter.
- To determine the effects of varying inlet concentrations on microbial growth and reaction rates.
- To identify the most suitable kinetic model for ketone biodegradation.
Main Methods:
- Experimental investigation of biochemical kinetic behaviors.
- Analysis of microbial growth rate (kg) and biochemical reaction rate (kd).
- Application of kinetic models, including zero-order kinetics with diffusion limitation.
Main Results:
- Higher inlet concentrations inhibited both microbial growth and reaction rates.
- Acetone exhibited the least growth inhibition at 100-150 ppm, while MEK showed the most reaction inhibition.
- Kinetic parameters (Ks, Vm) and maximum elimination capacities were determined for each ketone.
Conclusions:
- Zero-order kinetics with diffusion rate limitation best describes the biochemical reaction process.
- Biofilter performance is concentration-dependent, with varying sensitivities among ketone compounds.
- The study provides critical data for designing and operating biofilters for ketone removal.
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