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Influence of critical factors on nitrogen removal contribution by anammox and denitrification in an anammox-inoculated wastewater treatment system
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2020-12-17 , DOI: 10.1016/j.jwpe.2020.101868
Limei Wang , Yiguo Hong , Ji-Dong Gu , Jiapeng Wu , Jia Yan , Jih-Gaw Lin

Suitable environmental conditions facilitate the nitrogen removal in the wastewater treatment system. However, it remains unknown about how critical environmental factors regulating the activity of denitrification and anammox in the anammox-inoculated wastewater treatment system. In this study, the effect of temperature, pH, dissolved oxygen, organic matter, and substrates on denitrification and anammox activity was investigated with the nitrogen isotope pairing method. Results showed that the increase of temperature promoted the activities of both denitrification and anammox, and the activity of anammox was higher than that of denitrification at 25°C–30°C. Denitrification was more sensitive to acidic and alkaline pH values with the highest activity observed at neutral pH, but anammox has a more robust adaptability and the reaction rate remained relatively higher over a wider pH range. Moreover, anammox showed a stronger tolerance than denitrification to higher dissolved oxygen (DO) concentration. In addition, organic matter promoted the activity of denitrification significantly, while the anammox activity was inhibited by glucose, but enhanced by acetate, sodium formate and pyruvate. The denitrification and anammox reaction rates responding to nitrate were fitted well to Michaelis-Menten kinetics, but showing a linear relationship with nitrite. The results presented here offered useful information on how to regulate the environmental factors to improve the nitrogen removal efficiency from wastewater by facilitating the collaboration between denitrification and anammox.



中文翻译:

关键因素对接种厌氧菌的废水处理系统中厌氧菌脱氮和反硝化作用的影响

合适的环境条件有利于废水处理系统中的氮去除。但是,对于在接种过厌氧氨纶的废水处理系统中如何调节反硝化和厌氧氨氧化活性的关键环境因素,仍是未知的。在这项研究中,使用氮同位素配对方法研究了温度,pH,溶解氧,有机物和基质对反硝化和厌氧氨氧化活性的影响。结果表明,温度升高同时促进了反硝化和厌氧氨氧化的活性,在25°C–30°C时,厌氧氨氧化的活性高于反硝化的活性。反硝化对酸性和碱性pH值更敏感,在中性pH下观察到的活性最高,但是anammox具有更强的适应性,并且在较宽的pH范围内反应速率仍然相对较高。此外,对于较高的溶解氧(DO)浓度,厌氧氨水显示出比反硝化更高的耐受性。此外,有机物显着提高了反硝化活性,而葡萄糖则抑制了厌氧氨氧化活性,但乙酸盐,甲酸钠和丙酮酸则增强了反硝化活性。响应硝酸盐的反硝化和厌氧氨氧化反应速率非常符合Michaelis-Menten动力学,但与亚硝酸盐呈线性关系。此处提出的结果提供了有关如何通过促进反硝化与厌氧氨氮之间的协作来调节环境因素以提高废水脱氮效率的有用信息。此外,对于较高的溶解氧(DO)浓度,厌氧氨水显示出比反硝化更高的耐受性。此外,有机物显着提高了反硝化活性,而葡萄糖则抑制了厌氧氨氧化活性,但乙酸盐,甲酸钠和丙酮酸则增强了反硝化活性。响应硝酸盐的反硝化和厌氧氨氧化反应速率非常符合Michaelis-Menten动力学,但与亚硝酸盐呈线性关系。此处提出的结果提供了有关如何通过促进反硝化与厌氧氨氮之间的协作来调节环境因素以提高废水脱氮效率的有用信息。此外,对于较高的溶解氧(DO)浓度,厌氧氨水显示出比反硝化更高的耐受性。此外,有机物显着提高了反硝化活性,而葡萄糖则抑制了厌氧氨氧化活性,但乙酸盐,甲酸钠和丙酮酸则增强了反硝化活性。响应硝酸盐的反硝化和厌氧氨氧化反应速率非常符合Michaelis-Menten动力学,但与亚硝酸盐呈线性关系。此处提出的结果提供了有关如何通过促进反硝化与厌氧氨氮之间的协作来调节环境因素以提高废水脱氮效率的有用信息。有机物显着提高了反硝化活性,而葡萄糖则抑制了厌氧氨氧化活性,但醋酸盐,甲酸钠和丙酮酸则增强了反硝化活性。响应硝酸盐的反硝化和厌氧氨氧化反应速率非常符合Michaelis-Menten动力学,但与亚硝酸盐呈线性关系。此处提出的结果提供了有关如何通过促进反硝化与厌氧氨氮之间的协作来调节环境因素以提高废水脱氮效率的有用信息。有机物显着提高了反硝化活性,而葡萄糖则抑制了厌氧氨氧化活性,但醋酸盐,甲酸钠和丙酮酸则增强了反硝化活性。响应硝酸盐的反硝化和厌氧氨氧化反应速率非常符合Michaelis-Menten动力学,但与亚硝酸盐呈线性关系。此处提出的结果提供了有关如何通过促进反硝化与厌氧氨氮之间的协作来调节环境因素以提高废水脱氮效率的有用信息。但与亚硝酸盐呈线性关系。此处提出的结果提供了有关如何通过促进反硝化与厌氧氨氮之间的协作来调节环境因素以提高废水脱氮效率的有用信息。但与亚硝酸盐呈线性关系。此处提出的结果提供了有关如何通过促进反硝化与厌氧氨氮之间的协作来调节环境因素以提高废水脱氮效率的有用信息。

更新日期:2020-12-17
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