کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686696 889110 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Degradation of 4-aminobenzenesulfonate by alginate encapsulated cells of Agrobacterium sp. PNS-1
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Degradation of 4-aminobenzenesulfonate by alginate encapsulated cells of Agrobacterium sp. PNS-1
چکیده انگلیسی

Studies were carried out on 4-aminobenzenesulfonate (4-ABS) degradation by free and alginate entrapped cells of Agrobacterium sp. PNS-1. Degradation rate in batch reactors with free cells was marginally higher than Ca-encapsulated cells. Comparison of Ca2+ and Ba2+ as gelling agents showed that 4-ABS removal rate was significantly less with Ba-alginate entrapped cells. Specific degradation rates, using linear regression analysis and based on the initial biomass in the beads, varied from 49.7 mg/mg biomass/h to 92.0 mg/mg biomass/h for Ca-alginate encapsulated cells for different initial 4-ABS concentrations ranging from 200 to 800 mg/L. UV spectra of the aliquots drawn at different time intervals from batch reactors did not show accumulation of any intermediate during degradation. Ca-alginate immobilized cells could be repeatedly reused upto five cycles without any loss of activity. Studies with packed bed reactors, operated in a semi-continuous mode, showed that this could be used for 4-ABS degradation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 97, Issue 14, September 2006, Pages 1655–1659
نویسندگان
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