title: Kinetic characteristics of n-butyl alcohol and iso-butyl alcohol in a composite bead air biofilter.
abstract: Kinetic characteristics of n-butyl alcohol and iso-butyl alcohol in a composite bead biofilter were investigated. The microbial growth rate of n-butyl alcohol was greater than that of iso-butyl alcohol in the average inlet concentration range of 50-300 ppm. The microbial growth rate was inhibited at higher inlet concentration, and the inhibitive effect in the concentration range of 50-150 ppm was more pronounced than that in the concentration range of 150-300 ppm. The degree of inhibitive effect for n-butyl alcohol was more sensitive than that for iso-butyl alcohol in the concentration range of 50-150 ppm. The zero-order kinetic with the diffusion rate limitation could be regarded as the most adequate biochemical reaction model. The biodegradation rate of n-butyl alcohol was greater than that of iso-butyl alcohol in the average inlet concentration range of 50-300 ppm. The biochemical reaction rate was also inhibited at higher inlet concentration, and the inhibitive effect for iso-butyl alcohol was more pronounced than that for n-butyl alcohol. The factor of the chemical structure of compound was more predominant in the microbial growth and biochemical reaction processes. The maximum elimination capacity of n-butyl alcohol and iso-butyl alcohol were 55.7 and 34.8 g C h(-1)m(-3) bed volume, respectively. The compound with no side group in the main chain would be easier biodegraded by the microbial.
authors.affiliation: Civil Engineering Department, Chung-Hua University, Hsinchu 30067, Taiwan, ROC. wcchan@chu.edu.tw
authors.forename: Wu-Chung
authors.initials: WC
authors.lastname: Chan
authors.forename: Yu-Zhang
authors.initials: YZ
authors.lastname: Lai
mesh_terms: D020001:1-Butanol / Q000737:chemistry*; D000397:Air Pollution; D000438:Alcohols / Q000737:chemistry; D001671:Biochemistry / Q000379:methods*; D001673:Biodegradation, Environmental; D001709:Biotechnology / Q000379:methods*; D000440:Butanols / Q000737:chemistry*; D004058:Diffusion; D004305:Dose-Response Relationship, Drug; D005374:Filtration; D007700:Kinetics; D015203:Reproducibility of Results; D012987:Soil; D013997:Time Factors
chemical_list: D000438:Alcohols; D000440:Butanols; D012987:Soil; C040507:isobutyl alcohol; D020001:1-Butanol