期刊
BIORESOURCE TECHNOLOGY
卷 99, 期 7, 页码 2694-2698出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2007.05.042
关键词
Mycobacterium frederiksbergense; pyrene degradation; two-phase partitioning bioreactor; kinetics; three-half-order kinetic model
Biodegradation of pyrene by Mycobacterium frederiksbergense was studied in a two-phase partitioning bioreactor (TPPB) using silicone oil as non-aqueous phase liquid (NAPL). The TPPB achieved complete biodegradation of pyrene; and during the active degradation phase, utilization rates of 270, 230, 139, 82 mg l(-1) d(-1) for initial pyrene loading concentrations (in NAPL) of 1000, 600, 400 and 200 mg l(-1), respectively, were obtained. The degradation rates achieved using M. frederiksbergense in TPPB were much higher than the literature reported values for an ex situ PAH biodegradation system operated using single and pure microbial species. The degradation data was fitted to simple Monod, logistic, logarithmic, three-half-order kinetic models. Among these models, only exponential growth form of the three-half-order kinetic model provided the best fit to the entire degradation profiles with coefficient of determination (R-2) value >0.99. From the experimental findings, uptake of pyrene by the microorganism in TPPB was proposed to be a non-interfacial based mechanism. (c) 2007 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据