2004•Journal of Jiangsu Polytechnic UniversityRequires access
Research on Four Phthalic Acid Esters' Biodegradation and the Strains' Growth Characteristics
YE Zhang-rong
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Abstract
Research of four Phthalic Acid Esters′ (PAEs) biodegradation was carried out with two strains separated from the acclimated sludge.The constant of biodegradation velocity (k_b),K_m of Michaelis-Menten equation,and the maximum velocity of biodegradation (v_(max)) were obtained.The results showed that four PAEs' biodegradation could be described by first-order kinetics equations.Dimethyl Phthalate (DMP) was biodegraded more rapidly than Dibutyl Phthalate (DnBP) by strain 1.Their k_b,K_m and v_(max) were 0.154h~(-1),484.1mg·L~(-1) and 95.2mg·L~(-1)·h~(-1);0.007 9h~(-1),5 752.7mg·L~(-1) and 48.8mg·L~(-1)·h~(-1).Diheptyl Phthalate (DiHP) and Dioctyl Phthalate (DnOP) have the similar biodegradation efficiency by Strain 2.Their k_b,K_m and v_(max) were 0.022 4h~(-1),715.4mg·L~(-1) and 23.0mg·L~(-1)·h~(-1);0.022 7h~(-1),517.2mg·L~(-1) and 16.9mg·L~(-1)·h~(-1).