کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6672041 1427551 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study and modeling of forward osmosis process for activated sludge concentration by using residual brine from a stuffed olive factory as draw solution
ترجمه فارسی عنوان
بررسی تجربی و مدل سازی فرایند اسمز معکوس برای غلظت لجن فعال با استفاده از نمک های باقی مانده از یک کارخانه زیتون پر شده به عنوان راه حل رسم
کلمات کلیدی
اسمز معکوس قطبش تمرکز، مدل سازی، غلظت لجن، نمک های باقی مانده،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
In the present study, effect of external and internal concentration polarization (ECP and ICP), and reversible fouling on water flux behavior was evaluated for an activated sludge concentration process. A solution of activated sludge from the biological treatment unit of a wastewater treatment plant was used as a feed solution (FS), with an initial total suspended solids (TSS) concentration of 6198 mg/L. Residual brine from a stuffed olive factory was used as a draw solution (DS) because of its osmotic potential (equivalent to 1.2 M NaCl). This resulted in an increase in the initial FS concentration to around 16,850 mg/L. The experimental tests were carried out in a pilot plant with a flat FO membrane cell of 34 cm2, and FS and DS flow rates of 2 L min−1 and 0.5 L min−1, respectively, at 20 ±0.3 °C. An active layer facing the FS orientation was selected because of the high TSS concentration of the feed. Permeate flux showed initial values around 13.5 ± 0.5 L m−2/h for the first two hours of operation, but this gradually decreased to 5.3 ± 0.5 L m−2/h after 24 h. By modeling permeate flux performance, the role that the feed and draw concentrations, membrane orientation, and membrane properties play in water flux were elucidated and linked to the prevalence of external and internal concentration polarization. Internal concentration polarization and fouling on the active layer were found to play a significant role in the reduction in the driving force for the chosen system conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Water Process Engineering - Volume 21, February 2018, Pages 143-153
نویسندگان
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