کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9607689 | 45147 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of soluble organic, particulate organic, and hydraulic shock loads on anaerobic sequencing batch reactors treating slaughterhouse wastewater at 20 °C
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
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چکیده انگلیسی
Anaerobic sequencing batch reactors (ASBRs) treating slaughterhouse wastewater at 20 °C were subjected to soluble organic, particulate organic and hydraulic shock loads. The normal organic loading rate (OLR) was increased by a factor ranging from 1.5 to 3.6. During the soluble organic shock load, effluent soluble chemical oxygen demand (SCOD), volatile fatty acid (VFA), and suspended solids (SS) concentrations increased from averages of 200, 58 and 249 mg/l, respectively, in control reactors to maxima of 5626, 1642 and 10 723 mg/l, respectively, in overloaded reactors. However, concentrations were rapidly reduced to pre-shock load levels shortly after normal operating conditions were resumed. The particulate and hydraulic shock loads had small and temporary effects on effluent SCOD and VFA concentrations, but high SS concentrations were observed in the effluent of most overloaded reactors. However, solids loss during effluent discharge did not significantly affect long-term performance of the ASBRs, probably because the sludge bed contained high initial volatile SS (VSS) concentration (21.9 ± 3.2 g/l), and also a fraction of the VSS removed from the reactors during effluent discharge was composed of undegraded colloidal solids fed with the substrate, as opposed to bacterial flocs. Nevertheless, maintaining high VSS concentrations in the sludge bed will probably prevent long-term negative effect of biomass loss during sudden shock loads.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Biochemistry - Volume 40, Issues 3â4, March 2005, Pages 1225-1232
Journal: Process Biochemistry - Volume 40, Issues 3â4, March 2005, Pages 1225-1232
نویسندگان
L. Masse, D.I. Massé,