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Analysis of the characteristics of short-cut nitrifying granular sludge and pollutant removal processes in a sequencing batch reactor

机译:序批式反应器中短程硝化颗粒污泥特性及污染物去除过程分析

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Aerobic granular sludge is a new type of microbe auto-immobilization technology; in this paper, short-cut nitrification and denitrification were effectively combined with the granular sludge technology. Simultaneous nitrification and denitrification granules were developed in a sequencing batch reactor (SBR) using synthetic wastewater with a high concentration of ammonia nitrogen at 25 ℃ with a dissolved oxygen concentration above 2.0 mg/L and a 15 days sludge retention time. The characteristics of the sludge and the removal efficiency were studied, and the removal mechanisms of the pollutants and the process of short-cut nitrification were analyzed. The average granule diameter of the granular sludge was 704.0 μm. The removal rates of pollutants and the accumulation rate of nitrite in the SBR were studied. During treatment of wastewater with a high concentration of ammonia nitrogen, simultaneous nitrification, and denitrification and the stripping process could contribute to the removal of total nitrogen. The high pH value, the high concentration of free ammonia, and the delamination of granular sludge were the main factors contributing to the short-cut nitrification property of granular sludge in the reaction process.
机译:好氧颗粒污泥是一种新型的微生物自动固定技术。本文将短程硝化和反硝化与颗粒污泥技术有效地结合在一起。在顺序分批反应器(SBR)中开发了同时硝化和反硝化颗粒,使用合成废水,该废水在25℃时具有高浓度的氨氮,溶解氧浓度高于2.0 mg / L,污泥保留时间为15天。研究了污泥的特性和去除效率,分析了污染物的去除机理和短程硝化过程。颗粒污泥的平均颗粒直径为704.0μm。研究了丁苯橡胶中污染物的去除率和亚硝酸盐的积累率。在处理高浓度氨氮废水的过程中,同时进行硝化,反硝化和汽提过程可能有助于去除总氮。高pH值,高浓度的游离氨和颗粒污泥的分层是影响反应过程中颗粒污泥短时硝化性能的主要因素。

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