کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10160859 270 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decolorization of bromoamine acid by a newly isolated strain of Sphingomonas xenophaga QYY and its resting cells
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Decolorization of bromoamine acid by a newly isolated strain of Sphingomonas xenophaga QYY and its resting cells
چکیده انگلیسی
A novel strain (designated as QYY) which could grow with bromoamine acid (BAA) as the sole source of carbon, nitrogen and energy was isolated from sludge samples. The strain was identified by 16S rRNA sequencing and physiological-biochemical characteristics. It belonged to proteobacteria alpha subdivision: Sphingomonas xenophaga. For decolorization, the optimal temperature and shaking speed for both growing and resting cells were 30 °C and 150 rpm, respectively. While the most suitable pH was different, 6.5 for growing cells and 8.5 for resting cells. Under the optimal conditions, the removal percent of BAA was over 80-90%. And a conventional substrate-inhibited model-Haldane equation could be applied to describe the decolorization process by resting cells with the concentration range from 10.56 to 114 mg l−1, and the kinetic parameters were as follows: Vmax = 2.53 mg l−1 min−1, Ks = 19.90 mg l−1, Ksi = 91.91 mg l−1. The products were observed by the UV-vis absorbance spectra and the maximum absorption peak in visible area disappeared completely after a short period of incubation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Engineering Journal - Volume 27, Issue 2, 15 December 2005, Pages 104-109
نویسندگان
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