Bio-carrier and operating temperature effect on ammonia removal from secondary wastewater effluents using moving bed biofilm reactor (MBBR)

被引:82
作者
Ashkanani, Amal [1 ]
Almomani, Fares [1 ]
Khraisheh, Majeda [1 ]
Bhosale, Rahul [1 ]
Tawalbeh, Muhammad [2 ]
Aljaml, Khaled [1 ]
机构
[1] Qatar Univ, Coll Engn, Dept Chem Engn, POB 2713, Doha, Qatar
[2] Univ Sharjah, Coll Engn, Sustainable & Renewable Energy Engn Dept, POB 27272, Sharjah, U Arab Emirates
关键词
Secondary effluents; Performance; Organic loading; Total nitrogen; Biofilm growth; Clogging; Nitrification; NITROGEN REMOVAL; TERTIARY NITRIFICATION; DIFFUSION LIMITATION; NITRIFYING BACTERIA; OXIDIZING BACTERIA; DRINKING-WATER; TECHNOLOGY; SCALE; PERFORMANCE; EXPOSURE;
D O I
10.1016/j.scitotenv.2019.07.231
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study investigates the impact of bio-carriers' surface area and shape, wastewater chemistry and operating temperature on ammonia removal from real wastewater effluents using Moving bed biofilm reactors (MBBRs) operated with three different AnoxKaldness bio-carriers (K-3, K-5, and M). The study concludes the surface area loading rate, specific surface area, and shape of bio-carrier affect ammonia removal under real conditions. MBBR kinetics and sensitivity for temperature changes were affected by bio-carrier type. High surface area bio-carriers resulted in low ammonia removal and bio-carrier clogging. Significant ammonia removals of 1.420 +/- 0.06 and 1.103 +/- 0.06 g - N/m(2). d were achieved by K-3 (A(s) = 500 m(2)/m(3)) at 35 and 20 degrees C, respectively. Lower removals were obtained by high surface area bio-carrier K-5 (1.123 +/- 0.06 and 0.920 +/- 0.06 g - N/m(2). d) and M (0.456 +/- 0.05 and 0.295 +/- 0.05 g - N/m(2). d) at 35 and 20 degrees C, respectively. Theta model successfully represents ammonia removal kinetics with theta values of 1.12, 1.06 and 1.13 for bio-carrier K-3, K-5 and M respectively. MBBR technology is a feasible choice for treatment of real wastewater effluents containing high ammonia concentrations. (C) 2019 Elsevier B.V. All rights reserved.
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页数:10
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