Response surface methodology approach for simultaneous carbon, nitrogen, and phosphorus removal from industrial wastewater in a sequencing batch reactor
- سال انتشار: 1400
- محل انتشار: فصلنامه پیشرفت ها در فناوری محیط زیست، دوره: 7، شماره: 2
- کد COI اختصاصی: JR_AET-7-2_006
- زبان مقاله: انگلیسی
- تعداد مشاهده: 473
نویسندگان
Department of Biology, Islamic Azad University, Tonekabon Branch, Tonekabon, Mazandaran, Iran
Department of Environmental Science, University of Jiroft, Jiroft, Iran
Department of Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
Discipline of Chemical Engineering, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, ۴۷۵۰۰ Subang Jaya, Selangor Malaysia
School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, ۴۷۵۰۰ Subang Jaya, Selangor Malaysia
Discipline of Chemical Engineering, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, ۴۷۵۰۰ Subang Jaya, Selangor Malaysia
Department of Environmental Science, Tarbiat Modarres University, Noor, Iran
Water and Wastewater Research Center (WWRC), Razi University, Kermanshah, Iran
چکیده
Wastewater reclamation involving a sequencing batch reactor (SBR) has received more attention recently due to its high nutrient removal efficiency, cost-effectiveness, and low footprint. This study attempts to develop a stable and applicable activated sludge SBR for simultaneous carbon and nutrient removal from industrial wastewater. The derived-filed data were explored by response surface methodology (RSM) to identify the impact of operational variables on the SBR performance. Optimum conditions were obtained at ۴۰۰۰ mg/L MLSS, ۱۰۰: ۸: ۲ COD: N: P ratio, ۴۰ min/h aeration time, and ۴۰ h cycling time, which resulted in the removal of ۸۲.۵۳% chemical oxygen demand (COD), ۸۹.۸۳% TKN, ۸۷.۲۳% PO۴۳--P, and ۷۳.۴۶% NO۳--N. Moreover, the sludge volume index (SVI) and mixed liquor volatile suspended solids (MLVSS)/mixed liquor suspended solids (MLSS) ratio were ۶۴.۸ mL/g and ۰.۸, respectively. The maximum nitrification rate was calculated as ۱۱۳.۹ mg/L.d, which increased with the rise of the initial ammonium concentration. The specific denitrification rate (SDNR) was estimated in the range of ۰.۰۰۳-۰.۰۷ mgNO۳--N/mg MLVSS.d, depicting the high potential of the SBR reactor to eliminate nitrate by granular sludge. Accordingly, the removal efficiency of the optimized system revealed a notable capability towards meeting environmental regulations.کلیدواژه ها
Wastewater treatment, Response surface methodology, Granular sludge, SDNRاطلاعات بیشتر در مورد COI
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