کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
635888 1456119 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of bubble flow properties between flat sheet membranes in membrane bioreactor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Evaluation of bubble flow properties between flat sheet membranes in membrane bioreactor
چکیده انگلیسی

To optimize membrane bioreactor (MBR) equipment specifications and operating conditions in order to reduce the aeration rate, we investigated effects of the flat sheet membrane clearance and the bubble diameter on the shear stress on the membrane surface. The results were obtained using an apparatus consisting of a visible-channel, simulated-flat sheet MBR, in which the membrane clearance and bubble diameter could be varied. The shear stress on the simulated membrane surface was measured directly. We found that large bubbles with two-dimensional amorphous shapes between the membranes could make the shear stress large in comparison to the case of bubbles smaller than the membrane clearance. Moreover, we determined how to get the local maximum shear stress in the case of large bubbles. We developed a dimensionless index, consisting essentially of the membrane clearance and the bubble diameter that can be applied to describe the condition for maximizing the shear stress. Because the parameters of this index are easily obtainable, it is of significant benefit for effectively designing the operating conditions and equipment specifications of MBRs to promote scouring.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 360, Issues 1–2, 15 September 2010, Pages 102–108
نویسندگان
, ,