کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9684875 1456216 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Wastewater treatment of a vegetable oil factory by a hybrid ultrafiltration-activated carbon process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Wastewater treatment of a vegetable oil factory by a hybrid ultrafiltration-activated carbon process
چکیده انگلیسی
In this paper, experimental investigation of wastewater treatment by ultrafiltration (UF) is introduced. In the experiments, a UF membrane (UFPHT20-6338) and samples of Behshahr Ind. Co. wastewater as feed were used. Effect of operating conditions such as pressure difference, cross flow velocity, shear stress, temperature, concentration of organic compounds and pH on permeation flux, flux decline and fouling resistance were studied. Results show that a pressure difference more than 3 × 105 Pa (3 bar), a high cross flow velocity (depending on economic considerations), a temperature of 30 °C and a pH of 9 are the best operating conditions. Fouling of the membrane completely follows Hermia's model (cake filtration mechanism). Analysis of the wastewater treated by UF represents 91, 87, 100, 85 and 40% reduction in COD, TOC, TSS, [PO43−] and [Cl−], respectively. Also, treatment of the wastewater by UF-powdered activated carbon (PAC) was studied. According to results, using PAC in feed circulation loop of UF system with a concentration of about 0.1% (W) not only improves water quality but also increases permeation flux. A shear stress induced by PAC on the membrane surface decreases cake layer thickness and as a result increases permeation flux. Analysis of the wastewater treated by UF-PAC represents 94, 93, 100, 99 and 43% reduction in COD, TOC, TSS, [PO4−3] and [Cl−], respectively. Reduction of the phosphate concentration by UF-PAC is very considerable. A comparison between the results shows that UF is better than conventional biological method and UF-PAC is better than UF.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 254, Issues 1–2, 1 June 2005, Pages 129-137
نویسندگان
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