کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
682207 888978 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of low dissolved oxygen on simultaneous nitrification and denitrification in a membrane bioreactor treating black water
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Effect of low dissolved oxygen on simultaneous nitrification and denitrification in a membrane bioreactor treating black water
چکیده انگلیسی

Effect of low dissolved oxygen on simultaneous nitrification and denitrification was evaluated in a membrane bioreactor treating black water. A fully aerobic membrane bioreactor was operated at a sludge age of 60 days under three low dissolved oxygen (DO) levels below 0.5 mg/L. It sustained effective simultaneous nitrification/denitrification for the entire observation period. Nitrification was incomplete due to adverse effects of a number of factors such as low DO level, SMPs inhibition, alkalinity limitation, etc. DO impact was more significant on denitrification: Nitrate was fully removed at low DO level but the removal was gradually reduced as DO was increased to 0.5 mg/L. Nitrogen removal remained optimal within the DO range of 0.15–0.35 mg/L. Experimental results were calibrated and simulated by model evaluation with the same model coefficients. The model defined improved mass transfer with lower affinity coefficients for oxygen and nitrate as compared to conventional activated sludge.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 102, Issue 6, March 2011, Pages 4333–4340
نویسندگان
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