Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, India.
Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, India.
Bioresour Technol. 2016 Oct;218:723-30. doi: 10.1016/j.biortech.2016.07.002. Epub 2016 Jul 5.
Effluent of an upflow anaerobic sludge blanket reactor was treated in a downflow rope-bed-biofilm-reactor (RBBR) to remove residual organic matter and nitrogen. Nitrogen removal was observed in phase 1 and phase 2 with and without aeration, respectively for 320days each. Organic matter, ammonia and total nitrogen removal efficiencies of 78±2%, 95±1% and 79±11% were obtained in phase 1 and 78±2%, 93±9% and 87±6% in phase 2, respectively. In phase 2, anammox bacteria had a specific anammox activity of 3.35gNm(-2)day(-1). Heme c concentration, sludge characteristics and reaction ratios of dissolved oxygen, alkalinity and pH corroborated contribution of anammox process. Using experimental results kinetic coefficients required for design of RBBR were estimated. Anammox gave more stable performance under varying nitrogen loading and this option is more sustainable for solving problem of nitrogen removal from sewage.
上流式厌氧污泥床反应器的出水在下行绳状生物膜反应器（RBBR）中进行处理，以去除残留的有机物和氮。分别在有和没有曝气的情况下进行了两个阶段的实验，每个阶段持续 320 天。在第一阶段和第二阶段，分别获得了 78±2%、95±1%和 79±11%的有机物、氨和总氮去除效率，以及 78±2%、93±9%和 87±6%的去除效率。在第二阶段，厌氧氨氧化菌的厌氧氨氧化活性为 3.35gNm(-2)day(-1)。亚铁血红素 c 浓度、污泥特性以及溶解氧、碱度和 pH 的反应比证实了厌氧氨氧化过程的贡献。利用实验结果，估算了设计 RBBR 所需的动力学系数。在不同的氮负荷下，厌氧氨氧化表现出更稳定的性能，这种选择更有利于解决污水中氮去除的问题。
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