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应用生态学报 ›› 2022, Vol. 33 ›› Issue (6): 1451-1458.doi: 10.13287/j.1001-9332.202206.009

• 稳定同位素生态学专栏 • 上一篇    下一篇

工厂化堆肥温室气体排放和氨气同位素特征

刘东1,2, 孙剑平1, 王莹莹2,3, 宋琳琳2,3, 李靳2,3, 赵星涵2,3, 刘畅2, 全智2,4*, 方运霆2,4   

  1. 1沈阳建筑大学市政与环境工程学院, 沈阳 110168;
    2中国科学院沈阳应用生态研究所, 沈阳 110016;
    3中国科学院大学, 北京 100049;
    4辽宁省稳定同位素技术重点实验室, 沈阳 110016
  • 收稿日期:2021-09-17 接受日期:2022-03-31 出版日期:2022-06-15 发布日期:2022-12-15
  • 通讯作者: *E-mail: quanzhi@iae.ac.cn
  • 作者简介:刘 东, 男, 1996年生, 硕士研究生。主要从事堆肥含氮气体释放研究。E-mail: liudong6613@163.com
  • 基金资助:
    中国科学院黑土地保护与利用科技创新工程专项(XDA28020302)、国家自然科学基金项目(42177214,41701309)和中国科学院沈阳应用生态研究所寿光设施农业中心开放性课题(2018SG-B-03)资助。

Characterization of greenhouse gas emissions and stable isotopic composition of ammonia during industrial composting process

LIU Dong1,2, SUN Jian-ping1, WANG Ying-ying2,3, SONG Lin-lin2,3, LI Jin2,3, ZHAO Xing-han2,3, LIU Chang2, QUAN Zhi2,4*, FANG Yun-ting2,4   

  1. 1School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
    2Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    3University of Chinese Academy of Sciences, Beijing 100049, China;
    4Key Laboratory of Stable Isotope Techniques and Applications, Shenyang 110016, China
  • Received:2021-09-17 Accepted:2022-03-31 Online:2022-06-15 Published:2022-12-15

摘要: 畜禽废弃物堆肥处理过程中产生的二氧化碳(CO2)、氧化亚氮(N2O)、甲烷(CH4)和氨气(NH3)等是重要的温室气体和大气污染物。但目前有关该过程气体排放的研究多基于室内小型模拟的反应器式堆肥,在工厂化堆肥条件下的原位气体排放监测较少。为探究工厂化堆肥产生气体对区域环境的影响,本研究对沈阳某堆肥厂畜禽废弃物堆体的气体排放进行了19 d的监测,并量化了排放氨气的自然丰度15N(δ15N)特征。结果表明: 堆置周期内,CO2、CH4、N2O和NH3的平均排放速率分别为86.8 g CO2-C·d-1·m-2、9.8 g CH4-C·d-1·m-2、3.7 mg N2O-N·d-1·m-2和736.6 mg NH3-N·d-1·m-2。温室气体日增温潜势(GWP)的贡献大小为CH4>CO2>NH3(间接)>N2O,其中CH4贡献了65%。堆肥排放NH3的δ15N在-21.8‰~-7.2‰,平均-11.6‰±1.2‰。本研究结果可为区域畜禽废弃物堆肥过程中温室气体排放的核算及大气氨溯源提供数据支持。

关键词: 工厂化堆肥, 温室气体, 增温潜势, 15N-氨气自然丰度

Abstract: Carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4) and ammonia (NH3) emitted during the composting of livestock and poultry waste are important gaseous atmospheric pollutants. However, most previous studies on compost-related anthropogenic emissions of these gases were based on small reactor composting. Our understanding of their in situ emissions during industrial composting remains extremely limited. In order to explore the influence of gas produced by industrial composting on regional environment, we monitored CO2, CH4, N2O and NH3 emissions during industrial composting for 19 days and characterized the isotopic composition of emitted NH3. On average, the emission rates of CO2, CH4, N2O, and NH3 during the composting cycle were 86.8 g CO2-C·d-1·m-2, 9.8 g CH4-C·d-1·m-2, 3.7 mg N2O-N·d-1·m-2 and 736.6 mg NH3-N·d-1·m-2, respectively. The contribution of CH4 to daily global warming potential (GWP) was the highest (65%), followed by CO2, NH3(indirect), and N2O. Moreover, ammonia emitted from industrial compost had a mean δ15N value of -11.6‰±1.2‰ (range: -21.8‰--7.2‰). Overall, this study provided useful information for understanding greenhouse gas emission dynamics and characterizing atmospheric NH3 sources during composting process in livestock and poultry breeding areas.

Key words: industrial composting, greenhouse gases, global warming potential, ammonia isotopic composition