生化法处理城市污水一氧化二氮排放进展
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东北大学资源与土木工程学院

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中图法分类号 X52;

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基金项目:中央高校基本科研业务专项资金资助(N2023031);河北省教育厅科学技术研究项目资助(ZC2021209)


Progress on Biochemical Treatment of N2O Emissions from Urban Wastewater
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College of Resources and Civil Engineering,Northeastern University

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    摘要:

    “双碳”背景下,污水处理不仅要实现资源化,还要减少碳排放。N2O由于其增温趋势远高于CO2和CH4而被格外重视,也被评为21世纪对臭氧层威胁最大的温室气体之一。污水处理中硝化过程和反硝化过程都会产生N2O,反应过程中产生N2O机理与方式也存在差异,N2O的产生量也会由于工艺不同而改变。由于实际污水厂具有较高的处理能力,对于水质水量波动的耐冲击性强,同时其水质成分与水质参数变化极其复杂,需要通过分析影响城镇污水厂N2O产生的条件,进一步分析N2O排放机制。结果表明:CANON工艺是目前生化法脱氮效率最高的工艺;碳源、溶解氧浓度、温度、磁场强度均会影响污水厂N2O产生,而温度改变无法确定是改变了酶活性还是硝化反硝化反应平衡 ,碳源对N2O排放需要在工程实践中进一步研究。

    Abstract:

    Under the background of "dual carbon",sewage treatment not only needs to achieve resource utilization,but also needs to reduce carbon emissions. N2O has been given special attention due to its warming trend far exceeding that of CO2 and CH4,and has also been rated as one of the greenhouse gases that pose the greatest threat to the ozone layer in the 21st century. Both nitrification and denitrification processes in sewage treatment produce N2O,and there are differences in the mechanism and method of producing N2O during the reaction process. The amount of N2O produced will also change due to different processes. Due to the high processing capacity of actual sewage plants and their strong resistance to fluctuations in water quality and quantity,as well as the extremely complex changes in water quality components and parameters,it is necessary to analyze the conditions that affect N2O production in urban sewage plants and further analyze the N2O emission mechanism.The results showed that the CANON process is the most efficient process of biochemical denitrification at present, and the N2O generation in the sewage plant was affected by the carbon source, dissolved oxygen concentration, temperature and carbon intensity of the magnetic field, and the temperature change caould not determine whether the enzyme activity or nitrification denitrification reaction equilibrium was changed, and the N2O emission of carbon source needed to be further studied in engineering practice.

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程启原,李清伟,郑家星,等. 生化法处理城市污水一氧化二氮排放进展 [J]. 科学技术与工程, , ():

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  • 收稿日期:2024-04-08
  • 最后修改日期:2024-06-19
  • 录用日期:2024-06-24
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