کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
682624 888988 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Colour removal of dyes from synthetic and real textile wastewaters in one- and two-stage anaerobic systems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Colour removal of dyes from synthetic and real textile wastewaters in one- and two-stage anaerobic systems
چکیده انگلیسی

Decolourisation of the azo dye model compound, Congo Red (CR), and real textile wastewater, was assessed in one- and two-stage anaerobic treatment systems (R1 and R2, respectively). High colour removals were achieved in both treatment systems even when a very high CR concentration (1.2 mM) was applied. However, R2 presented a slightly better stability, in which the acidogenic reactor (R2,A) played a major role on dye reduction, as compared to the methanogenic reactor (R2,M), evidencing the role of fermentative microorganisms. The minimum electron donor concentration required to sustain dye reduction was much higher than the stoichiometric amount. Additionally, a decrease on the hydraulic retention time (from 24 to 12 h) did not significantly affect decolourisation, indicating that electron transfer was not a concern. Finally, experiments with real textile wastewater showed low decolourisation efficiencies in both systems, most likely due to the presence of dyes not susceptible to reductive decolourisation under these experimental conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 101, Issue 20, October 2010, Pages 7773–7779
نویسندگان
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