生物载体和操作温度对移动床生物膜反应器（MBBR）去除二级废水氨氮的影响。
Bio-carrier and operating temperature effect on ammonia removal from secondary wastewater effluents using moving bed biofilm reactor (MBBR).
机构信息
Department of Chemical Engineering, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar.
Department of Chemical Engineering, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar.
出版信息
Sci Total Environ. 2019 Nov 25;693:133425. doi: 10.1016/j.scitotenv.2019.07.231. Epub 2019 Jul 16.
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 K 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. d were achieved by K(A = 500 m/m) at 35 and 20 °C, respectively. Lower removals were obtained by high surface area bio-carrier K (1.123 ± 0.06 and 0.920 ± 0.06 g - N/m. d) and M (0.456 ± 0.05 and 0.295 ± 0.05 g - N/m. d) at 35 and 20 °C, respectively. Theta model successfully represents ammonia removal kinetics with θ values of 1.12, 1.06 and 1.13 for bio-carrier K, K and M respectively. MBBR technology is a feasible choice for treatment of real wastewater effluents containing high ammonia concentrations.
本研究采用三种不同的 AnoxKaldness 生物载体（K、K 和 M）运行移动床生物膜反应器（MBBR），考察了生物载体表面积和形状、废水化学性质和操作温度对实际废水处理中氨氮去除的影响。研究表明，在实际条件下，生物载体的表面积负荷率、比表面积和形状会影响氨氮的去除效果。MBBR 动力学和对温度变化的敏感性受生物载体类型的影响。高比表面积的生物载体会导致氨氮去除率低和生物载体堵塞。K（A=500 m/m）在 35°C 和 20°C 下的氨氮去除率分别为 1.420±0.06 和 1.103±0.06 g-N/m·d。高比表面积的生物载体 K（1.123±0.06 和 0.920±0.06 g-N/m·d）和 M（0.456±0.05 和 0.295±0.05 g-N/m·d）在 35°C 和 20°C 下的去除率较低。θ 模型成功地代表了生物载体 K、K 和 M 的氨氮去除动力学，θ 值分别为 1.12、1.06 和 1.13。MBBR 技术是处理高氨氮浓度实际废水的可行选择。
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