کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
685268 889037 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decolorization and biosorption for Congo red by system rice hull- Schizophyllum sp. F17 under solid-state condition in a continuous flow packed-bed bioreactor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Decolorization and biosorption for Congo red by system rice hull- Schizophyllum sp. F17 under solid-state condition in a continuous flow packed-bed bioreactor
چکیده انگلیسی

Synthetic dyes are important chemical pollutants from various industries. This work developed an efficient and relatively simple continuous decolorization system rice hull-Schizophyllum sp. F17 under solid-state condition in a packed-bed bioreactor, for decolorizing Congo red. In the decolorization system, two decolorization mechanisms exist, one is decolorization by Schizophyllum sp. F17, the other is biosorption by rice hull. The decolorization efficiency was greatly affected by dye concentration and hydraulic retention time (HRT), which were quantificationally analyzed and optimized through response surface methodology (RSM). A 22 full factorial central composite design (CCD) was performed, and three second order polynomial models were generated to describe the effects of dye concentration and HRT on total decolorization (R2 = 0.902), decolorization by Schizophyllum sp. F17 (R2 = 0.866) and biosorption by rice hull (R2 = 0.890). Response surface contour plots were constructed to show the individual and cumulative effects of dye concentration and HRT, and the optimum values. A maximum total decolorization 89.71% and maximum decolorization by Schizophyllum sp. F17 60.44% was achieved at dye concentration 142.63 mg/L, HRT 41 h, and dye concentration 110.7 mg/L, HRT 29.4 h, respectively. Meanwhile, the role of manganese peroxidase (MnP) in the decolorizaion process was investigated. This study proved the feasibility of continuous mode for decolorizing synthetic dyes by white-rot fungi in solid-state fermentation bioreactors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 99, Issue 15, October 2008, Pages 6885–6892
نویسندگان
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