کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7081981 | 1460003 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The potential of oxygen to improve the stability of anaerobic reactors during unbalanced conditions: Results from a pilot-scale digester treating sewage sludge
ترجمه فارسی عنوان
پتانسیل اکسیژن برای بهبود پایداری راکتورهای بی هوازی در شرایط نامتعادل: نتایج حاصل از آزمایشگاه لجن فاضلاب تصفیه فاضلاب
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
A well-functioning pilot reactor treating sewage sludge at approximately 4.4Â NL/m3/d of oxygen supply and 18Â d of hydraulic retention time (HRT) was subjected to a hydraulic overload to investigate whether oxygen benefits successful operation in stressful circumstances. Only a mild imbalance was caused, which was overcome without deterioration in the digestion performance. Volatile solids (VS) removal was 45% and 43% at 18 and 14Â d of HRT, respectively. Biogas productivity remained around 546Â NmL/gVS, but it was slightly higher during the period of imbalance. Thereafter, similar performances were achieved. Under anaerobic conditions, VS removal and biogas productivity were respectively 41% and 525Â NmL/gVS, hydrogen partial pressure rose, and acetic acid formation became less favourable. Oxygen seemed to form a more stable digestion system, which meant increased ability to deal successfully with overloads. Additionally, it improved the biogas quality; methane concentration was negligibly lower, while hydrogen sulphide and oxygen remained around 0.02 and 0.03%Â v/v, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 140, July 2013, Pages 80-85
Journal: Bioresource Technology - Volume 140, July 2013, Pages 80-85
نویسندگان
I. Ramos, M. Fdz-Polanco,