کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8104392 | 1522150 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The reuse of water treatment sludge as a coagulant for post-treatment of UASB reactor treating urban wastewater
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
The feasibility of reusing polyaluminium chloride-based water treatment sludge as a coagulant for the post-treatment of upflow anaerobic sludge blanket (UASB) reactor treating urban wastewater was assessed. Response surface methodology with Box-Behnken design was employed to optimise three variables affecting coagulation/flocculation process namely sludge dose, initial pH and fresh coagulant dose. Results of the modelling study gave the following optimum conditions: sludge dose 15Â g/L, initial pH 9 and fresh coagulant dose 4.2Â mg Al/L; and predicted 72% COD removal and 88% turbidity removal. Confirmative experiments at the optimum conditions gave COD and turbidity removals of 74% and 89%, respectively, which were in close agreement with the predicted values. Further, at optimum conditions high removals of phosphate (79%), suspended solids (84%), BOD (78%) and total coliforms (99.7%) were obtained. The experiments also showed that a combination of water treatment sludge with fresh coagulant would give a substantially higher contaminant removal compared to the removals obtained by fresh coagulant alone. The study presents a novel reuse alternative for water treatment sludge and the results suggest that reuse of water treatment sludge as a coagulant for the post-treatment of UASB reactor effluent would be an attractive option.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 96, 1 June 2015, Pages 272-281
Journal: Journal of Cleaner Production - Volume 96, 1 June 2015, Pages 272-281
نویسندگان
Abhilash T. Nair, M. Mansoor Ahammed,