کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686660 889100 2007 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Removal of chlorophenols in sequential anaerobic–aerobic reactors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Removal of chlorophenols in sequential anaerobic–aerobic reactors
چکیده انگلیسی

Combination of upflow anaerobic sludge blanket (UASB) and aerobic rotating biological contactor (RBC) reactors having higher biomass concentration and higher sludge retention time (SRT) was applied for the sequential treatment of priority pollutant chlorophenol containing wastewater. Target compounds 2-chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP) present in two simulated wastewaters at a concentration of 30 mg/l each individually were sequentially treated in continuous mode by combined UASB-I, RBC-I and combined UASB-II, RBC-II reactors, respectively after the acclimation of their biomass with the corresponding chlorophenol. Reactor combinations took 190 and 215 days for acclimation with 30 mg/l of 2-CP and 2,4-DCP respectively. Hydraulic retention time (HRT) studies showed that 12 h HRT of UASB-I and 23 h HRT of RBC-I as well as 12 h HRT of UASB-II and 28.8 h HRT of RBC-II were the optimum combinations for the treatment of simulated wastewater containing 2-CP and 2,4-DCP respectively. Optimum HRT combinations produced 2-CP and 2,4-DCP effluent having corresponding chlorophenol concentration of below detectable limit (BDL) and 0.1 mg/l respectively. Half velocity coefficients (Ks) for 2-CP and 2,4-DCP biodegradation in UASB reactors were determined to be 5.07 mg 2-CP/l and 6.49 mg 2,4-DCP/l. Optimum ratio of substrate (chlorophenol): co-substrate (sodium acetate) was 1:100.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 98, Issue 1, January 2007, Pages 118–129
نویسندگان
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