کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9681120 1455511 2005 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Studies on the minimisation of NOM fouling of MF/UF membranes with the help of a submerged “single” capillary membrane apparatus
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Studies on the minimisation of NOM fouling of MF/UF membranes with the help of a submerged “single” capillary membrane apparatus
چکیده انگلیسی
This paper looks into the problem of fouling of UF/MF membranes due to NOM present in surface waters. NOM can be divided into particulate, colloidal and dissolved fractions. The idea here is to fractionate the surface water into the above-mentioned fractions, and to test the fouling characteristics of each fraction on a MF membrane, with and without pre-treatment by coagulation. Coagulation was performed at a pH of 7.5, using poly aluminium chloride (PAC) (2.5 mg/L Al3+), and the flocculated solution was slowly transferred into the feed tank of the filtration unit. A lab-scale single membrane capillary (SMC) test unit was used for the filtration test runs. The bulk surface water was fractionated using 0.45 μm (MF), 5kD (UF) and/or 3.5 kD dialysis bags. Membrane performance was measured using permeability decline and its recovery after each backwash. Feed and permeate samples were analysed using UVA254 (m−1) to estimate the organics removal through filtration. It could be shown that (1) particulates (organic/inorganic) helped minimise irreversible fouling, (2) the colloidal organics are the most irreversible fouling causing fraction, and (3) coagulation pre-treatment plays a significant role in improving and stabilising membrane performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 179, Issues 1–3, 10 July 2005, Pages 355-367
نویسندگان
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