کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
632915 1456010 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of pretreatment conditions and chemical ageing on ultrafiltration membrane performances. Diagnostic of a coagulation/adsorption/filtration process
ترجمه فارسی عنوان
تأثیر شرایط پیش درمان شده و پیرایش شیمیایی بر روی عملکرد غشاء اولترافیلتراسیون. تشخیص فرآیند انعقاد / جذب / فیلتراسیون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• 5-year-old membranes autopsy revealed the absence of PVP inside the polymer.
• 5-year-old membranes were found much more sensitive to fouling than virgin membrane.
• Fouling is strongly related to the degradation of PVP due to chlorine oxidation.

This study investigated the impact of water pretreatments (i.e. activated carbon, ferric chloride and polyelectrolyte organic polymer) and dynamic chemical ageing by chlorine on performances of PES/PVP hollow fiber membranes. For this, several filtration experiments were carried out on pristine membranes and on 5-year-old membranes sampled from a large drinking water treatment plant (DWTP membranes) exhibiting strong fouling event with no clear explanation. Autopsy performed on the DWTP membranes revealed the presence of a brown fouling layer consisting of organic matters, iron, flocculent polymer and activated carbon. Filtration tests showed the strong fouling sensitivity of the autopsied membranes compared to the pristine membranes. Further autopsy analyses and filtration experiments demonstrated the link between PVP degradation inside the membrane due to frequent chlorine backwashes and the increase in membrane fouling sensitivity.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 489, 1 September 2015, Pages 284–291
نویسندگان
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