کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580585 | 1453152 | 2010 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Treatment of fatliquoring effluent from a tannery using membrane separation process: Experimental and modeling
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Treatment of fatliquoring effluent generated from a tannery, using a hybrid separation process involving gravity settling, two step coagulation, nanofiltration and reverse osmosis is presented in this study. The optimum dose of coagulation, i.e., 0.5% (w/v) of ferrous sulfate followed by 0.15% (w/v) calcium oxide resulted in reduction of chemical oxygen demand from 13688 to 4921Â mg/l. Low pressure nanofiltration of the supernatant was carried out in the range of 828-1242Â kPa. Chemical oxygen demand of the nanofiltration permeate varied from about 1300-2700Â mg/l depending upon the operating conditions. To bring the chemical oxygen demand value less than the allowable permissible limit in India (250Â mg/l), nanofiltration permeate was subjected to reverse osmosis (operating pressure range from 1313 to 1724Â kPa). The final treated effluent, i.e., reverse osmosis permeate had chemical oxygen demand values in the range of 117-174Â mg/l. The membrane filtration experiments included flow in laminar, laminar with turbulent promoter and turbulent flow regimes. Using a combination of osmotic pressure and solution diffusion model for both nanofiltration and reverse osmosis, three transport coefficients, namely, the effective osmotic coefficient, solute diffusivity and solute permeability through the membrane were obtained by comparing the permeate flux and permeate concentrations using the model calculated values and the experimental data. The calculated data agreed closely with the experimental values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 176, Issues 1â3, 15 April 2010, Pages 434-443
Journal: Journal of Hazardous Materials - Volume 176, Issues 1â3, 15 April 2010, Pages 434-443
نویسندگان
C. Prabhavathy, Sirshendu De,