落水曝气-内循环方式对低 C/N 比污水脱氮效果及在新型上流式微氧污泥反应器中应用。
Effect of the method of falling water aeration-reflux on nitrogen removal and applicability in a novel upflow microaerobic sludge reactor treating low carbon-to-nitrogen ratio wastewater.
机构信息
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China; River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China.
出版信息
Bioresour Technol. 2019 Aug;285:121304. doi: 10.1016/j.biortech.2019.03.143. Epub 2019 Mar 30.
A novel falling water aeration-external reflux upflow microaerobic sludge reactor (UMSR) was designed to treat wastewater with the low chemical oxygen demand (COD) to total nitrogen (TN) ratio. The result showed the concentration of dissolved oxygen (DO) in the reactor could be accurately controlled by adjusting the reflux ratio of oxygenated water. The higher aeration efficiency in pollutant removal could be obtained by the reoxygenation mode of the small height falling water. At the reflux ratio of 5:1, the ammonium, nitrite and nitrate nitrogen concentrations in the effluent of UMSR were 6.0, 0.4 and 6.1 mg/L on average, respectively. The removal efficiency of ammonium nitrogen and total nitrogen reached 90.53% and 80.77%, respectively with the influent COD/TN as being 1.0. The structure of the microbial community confirmed the existence of partial-denitrification/anaerobic ammonium oxidation (anammox) bacteria, autotrophic and heterotrophic denitrifiers contributed to nitrogen and carbon removal in UMSR.
一种新型落水曝气外回流升流式微氧污泥反应器（UMSR）被设计用来处理低化学需氧量（COD）与总氮（TN）比的废水。结果表明，通过调节充氧水的回流比，可以精确控制反应器中的溶解氧（DO）浓度。通过小高度落水的再充氧方式，可以获得更高的污染物去除曝气效率。在回流比为 5:1 时，UMSR 出水中的氨氮、亚硝酸盐氮和硝酸盐氮的浓度平均值分别为 6.0、0.4 和 6.1mg/L。当进水 COD/TN 为 1.0 时，氨氮和总氮的去除效率分别达到 90.53%和 80.77%。微生物群落的结构证实了部分反硝化/厌氧氨氧化（anammox）细菌的存在，自养和异养反硝化菌有助于 UMSR 中的氮和碳去除。
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