کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
627926 1455478 2007 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sludge rheological and physiological characteristics in a pilot-scale submerged membrane bioreactor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Sludge rheological and physiological characteristics in a pilot-scale submerged membrane bioreactor
چکیده انگلیسی

Rheological and physiological characteristics of sludge in a submerged membrane bioreactor (MBR) were studied in order to classify their effects on filtration properties and membrane fouling. Viscosity, mixed liquor suspended solids (MLSS), extracellular polymer substances (EPS), soluble chemical oxygen demand (SCOD), dewaterability in terms of capillary suction time (CST), proteins and carbohydrates in the mixed liquor and their correlations with membrane fouling were investigated during a long-term performance. Statistical analysis was employed to specify the influence of temperature, viscosity, MLSS, EPS, CST, SCOD, proteins and carbohydrates in the mixed liquor on membrane fouling. It was found that high MLSS concentration with a high apparent viscosity not only changed rheological characteristics of the mixed liquor, but also affected oxygen transfer coefficient in the submerged MBR. Among all these variables, viscosity, MLSS, EPS, CST, SCOD, carbohydrates and proteins in the mixed liquor were found to have positive correlations with membrane fouling. CST had the greatest impact on membrane fouling, followed by SCOD, carbohydrates, EPS, proteins, apparent viscosity and MLSS, respectively. Test results demonstrated that temperature had negative correlations with membrane fouling rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 212, Issues 1–3, 25 June 2007, Pages 152-164