کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
18209 42714 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cometabolic degradation of chlorophenols by a strain of Burkholderia in fed-batch culture
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Cometabolic degradation of chlorophenols by a strain of Burkholderia in fed-batch culture
چکیده انگلیسی

This work deals with the study of mono and dichlorophenols degradation by a strain of Burkholderia isolated from the Santa Alejandrina marsh, Minatitlán, Veracruz, México. This strain also degrades benzene, toluene and xylene and was identified as the N2-fixing bacteria Burkholderia tropicalis. In addition, the cometabolic degradation of 2-chlorophenol (2-CP), 4-chlorophenol (4-CP), 2,4-dichlorophenol (2,4-DCP) and 2,6-dichlorophenol (2,6-DCP) was evaluated in batch and fed-batch cultures, using phenol as the primary substrate. This bacterial strain was unable to degrade the highly substituted chlorophenols 2,4,5-TCP, 2,4,6-TCP and pentachlorophenol.Except for 4-CP, the cometabolic degradation of chlorophenols in batch culture was slow and inefficient, but when B. tropicalis was cultivated in fed-batch system, the removal efficiencies obtained were 93% for 2-CP, 95% for 2,6-DCP, 96% for 2,4-DCP and 100% for 4-CP. However, low cell growth yields were obtained in both batch and fed-batch cultures. This could be attributed to the uncoupling action of the aromatic compounds involved and, except for 2,6 DCP, to the accumulation of metabolic by-products.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Enzyme and Microbial Technology - Volume 40, Issue 1, 6 December 2006, Pages 57–60
نویسندگان
, , , , ,