کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
623550 1455352 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Toward improvement of methods for predicting fouling of desalination membranes — The effect of permeate flux on specific fouling resistance
ترجمه فارسی عنوان
به سوی بهبود روش های پیش بینی ضعیف شدن غشاهای آب شیرین کن اثر شار پرایمت بر مقاومت خاصی در برابر زلزله
کلمات کلیدی
دفع غشاء نمک زدایی، فاکتورهای آلی، شار ثابت و فیلتراسیون فشار ثابت، همبستگی مقاومت فشاری، اثر شار بر مقاومت خاص
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• The specific resistance is recommended as most representative fouling layer property.
• The specific cake resistance α depends on permeate flux to a power greater than one.
• An impact assessment of main process variables on membrane fouling is performed.
• Narrow ranges of α and index I are identified as criteria of fluid fouling propensity.

Progress is reported toward development of a realistic and theoretically sound approach, enabling reliable predictions of membrane fouling in desalination processes. A significant amount of recent data obtained with typical organic foulants, in constant-flux and constant-pressure desalination, is revisited focusing on the dependence of specific fouling resistance α on permeate-flux J. Although clarifying quantitatively this dependence requires more work, these data suggest that, for the initial phase of fouling, α depends on J to a power greater than one. Furthermore, it is argued that α is the most appropriate fouling layer (intrinsic) property to both develop constitutive-type expressions relating fouling resistances to system variables (for predicting fouling evolution throughout membrane modules), and serve as a reliable indicator of feed-fluid fouling propensity. The advantages of resistance α for both applications are discussed; for the latter case, a simple parametric analysis of main process variables (flux, foulant concentration, membrane resistance Rm) shows that there is no single-value indicator (α or other) that can represent the fouling propensity of feed-fluids under all conditions (e.g. for both high-pressure and low-pressure desalination). Moreover, specific narrow ranges of resistance α values can be identified as criteria to assess membrane fouling for various desalination conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 343, 16 June 2014, Pages 97–105
نویسندگان
, ,