کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7079241 1459991 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Floatation of granular sludge and its mechanism: A key approach for high-rate denitrifying reactor
ترجمه فارسی عنوان
شناور شدن لجن گرانول و مکانیزم آن: یکی از روش های کلیدی برای رآکتور دنتیتیوین با سرعت بالا
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
A high-rate denitrifying automatic circulate (DAC) reactor has been developed recently, and it is promising to become an alternative in nitrogen removal from wastewaters. However, the performance of DAC reactor was disturbed by the floatation of granular sludge at high-loads. The results showed that: the floatation of granular sludge led to a serious biomass washout and a sharp decrease of biomass concentration. The floatation of granular sludge was ascribed to a low sludge density originated from the holdup of gaseous products. The average density and average gas holdup ratio of floated granular sludge were 913 kg m−3 and 11.8% (by volume), respectively. The floatation of granular sludge could disappear by releasing gas when sludge was in the state of elastic expansion, but it would become worse by holding gas when it entered the plastic expansion state. The plastic expansion of granules was significantly correlated with the less content of extracellular polymeric substances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 152, January 2014, Pages 414-419
نویسندگان
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