【摘要】 猪场沼液碳氮比（C/N）低，利用短程硝化反硝化工艺直接处理时，导致反硝化过程释放大量温室气体氧化亚氮（N₂O）。为解决该问题，以序批式活性污泥法（SBR）和缺氧/好氧（A/O）反应器为基础构建了添加猪场原废水和厌氧氨氧化菌2种策略，并评估2种策略对N2O的减排潜力。结果表明：添加猪场原废水策略下，相较C/N为2/1，添加原水至C/N为4.5/1时，SBR和A/O分别能减少55%和60%的N2O排放量。厌氧氨氧化生物强化策略下，SBR和A/O分别能减少89%和7%的N₂O排放量。添加猪场原废水策略下，A/O的反硝化活性和电子传递系统活性高于SBR，其具有更高反硝化能力，因此适合采用添加原水来减排N₂O；厌氧氨氧化生物强化策略下，SBR污泥的厌氧氨氧化活性和电子系统活性高于A/O，厌氧氨氧化菌在SBR反应器中能够快速适应，因此适合改造为短程硝化厌氧氨氧化工艺来减排N₂O。研究结果对缓解沼液生物脱氮过程温室气体N₂O减排具有重要现实意义。更多还原

【Abstract】 Due to the low C/N ratio of liquid digestate of swine wastewater,a large amount of greenhouse gas nitrous oxide （N₂O） is released in the denitrification process when liquid digestate is treated by partial nitrification and denitrification process.In order to solve this problem,we constructed two strategies,i.e.adding raw swine wastewater and anammox bacteria,based on sequencing batch reactor （SBR） and aerobic/anoxic （A/O） reactors The N₂O emission reduction potential of the two strategies was evaluated.The results indicated that under the strategy of adding raw swine wastewater,compared with the C/N ratio of 2/1,when the raw swine wastewater was added to the C/N ratio of 4.5/1,the N₂O emission of SBR and A/O could be reduced by 55%and 60%,respectively After the bioaugmentation of anammox bacteria,the SBR and A/O could reduce N₂O emission by 89%and 7%respectively.Under the strategy of adding raw swine wastewater,the denitrification activity and electron transpor system activity of the sludge from A/O were higher than those from SBR,and A/O had higher denitrification ability than SBR.Therefore,A/O was suitable for adding raw water to reduce N₂O emission.Under the strategy of adding anammox bacteria,the anammox activity and the electronic system activity of the sludge from SBR were higher than those from A/O,and the anammox bacteria could quickly adapt to SBR reactor,so SBR was suitable for transforming into a short-range nitrification anammox process to reduce N₂O.The research results have importan practical significance for mitigating the emission reduction of nitrous oxide during the biological denitrification treatment of liquid digestate.更多还原