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首页> 外文期刊>Journal of industrial and engineering chemistry >Treatment performance and N2O emission in the UASB-A/O shortcut biological nitrogen removal system for landfill leachate at different salinity
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Treatment performance and N2O emission in the UASB-A/O shortcut biological nitrogen removal system for landfill leachate at different salinity

机译：UASB-A / O短程生物除氮系统在不同盐度下的处理性能和N2O排放

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Landfill leachate was treated using the upflow anaerobic sludge blanket (UASB) combined with anoxic/aerobic reactor (A/O) for shortcut biological nitrogen removal. The treatment performance and nitrous oxide (N2O) emission were studied under different salinity. When salinity increased from 10 to 35 g/L, the removal efficiency of ammonium nitrogen and total nitrogen decreased from 99.3 to 83.9% and from 85.4 to 68.4%, respectively while the nitrite accumulation rate always remained high at more than 94.3%. The N2O conversion ratio increased by 14.7 times, from 0.3 to 4.7%. The concentration of biodegradable COD in influent of the A/O reactor increased with the increase of salinity, which lead to the decrease of dissolved oxygen and thus stimulated N2O emission remarkably during the aerobic zone. Meanwhile, the N2O emissions were likely to occur by a combination of pathways since the simultaneous nitritation and denitritation was occurred in aerobic zone. The increase of NH4+-N concentration, NO2--N concentration and pH caused by high salinity also promoted the N2O emission. The population of Nitrosomonas europaea increased with salinity, which was important for N2O emission. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：使用上流式厌氧污泥层（UASB）结合缺氧/好氧反应器（A / O）处理垃圾渗滤液，以快速去除生物氮。研究了不同盐度下的处理性能和一氧化二氮（N2O）排放。当盐度从10 g / L增加到35 g / L时，铵态氮和总氮的去除率分别从99.3％下降到83.9％和85.4％下降到68.4％，而亚硝酸盐累积率始终保持在94.3％以上。 N2O转化率从0.3提高到4.7％，提高了14.7倍。随着盐度的增加，A / O反应器进水口中可生物降解的COD浓度增加，这导致溶解氧的减少，从而在好氧区显着刺激了N2O的排放。同时，由于在好氧区同时发生硝化和反硝化作用，N2O排放可能通过多种途径组合发生。高盐度引起的NH4 + -N浓度，NO2--N浓度和pH值的增加也促进了N2O的排放。盐碱沼的种群随着盐度的增加而增加，这对于N2O排放很重要。 （C）2015韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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