天津农学院学报 ›› 2023, Vol. 30 ›› Issue (2): 23-26.doi: 10.19640/j.cnki.jtau.2023.02.005

• 研究与简报 • 上一篇    下一篇

不同季节自然存放条件下牛场沼液成分变化

袁佳艺, 介彦文, 边贺颖, 郑珊珊, 蒋韵, 石利军通信作者   

  1. 天津农学院 农学与资源环境学院,天津 300392
  • 收稿日期:2021-09-17 出版日期:2023-04-30 发布日期:2023-06-28
  • 通讯作者: 石利军(1970—),男,教授,博士,主要从事农业环境保护方面的研究。E-mail:shilj898@126.com。
  • 作者简介:袁佳艺(1999—),女,本科在读,研究方向:环境科学。E-mail:1350064164@qq.com。
  • 基金资助:
    天津市大学生创新创业训练计划项目(202010061006); 天津市科技局项目(21ZYCGSN00090)

Changes of cattle farm biogas slurry composition under natural storage conditions in different seasons

Yuan Jiayi, Jie Yanwen, Bian Heying, Zheng Shanshan, Jiang Yun, Shi LijunCorresponding Author   

  1. College of Agronomy and Resource Environment, Tianjin Agricultural University, Tianjin 300392, China
  • Received:2021-09-17 Online:2023-04-30 Published:2023-06-28

摘要: 以牛场沼液为研究对象,考察不同季节自然存放条件下沼液成分的变化。结果表明:自然存放条件下温度对沼液成分变化有重要影响,相比于秋冬季(10月至次年1月),夏季(6—9月)COD降解较快,在初始COD质量浓度为6 975 mg/L的条件下,60 d时COD质量浓度降至3 158 mg/L并趋于稳定,降解率达到54.7%,而秋冬季60 d后COD降解率只有27.0%;不同季节沼液中速效养分NH4+-N、PO43--P质量浓度都逐渐降低且降低率大体相同,夏季自然存放60 d时,NH4+-N、PO43--P的降低率分别为27.5%和55.4%,而秋冬季降低率分别为26.5%和49.1%。本研究结果可为牛粪沼液还田的实际应用提供了参考。

关键词: 沼液, 自然存放, 温度, 成分变化

Abstract: In this article cattle farm biogas slurry was used as the research object to investigate the changes of biogas slurry composition under natural storage conditions in different seasons. The results showed that the temperature has an important effect on the composition of biogas slurry under natural storage conditions. Compared with autumn and winter(from October to January of the following year), COD degradation was faster in summer(from June to September). When the initial COD concentration was 6 975 mg/L, the COD concentration decreased to 3 158 mg/L and tended to be stable at the end of 60 days, and the degradation rate reached 54.7%, while the COD decomposition rate was only 27.0% in autumn and winter after 60 days. The available nutrients NH4+-N and PO43--P in biogas slurry decreased in different seasons, and the decrease rates were roughly the same. The decrease rates of NH4+-N and PO43--P were 27.5% and 55.4% respectively at the end of 60 days in summer, and that of NH4+-N and PO43--P were 26.5% and 49.1% respectively 60 days later in autumn and winter. The results of this article could provide a reference for the practical application of returning the cattle farm biogas slurry to the field.

Key words: biogas slurry, natural storage, temperature, composition change

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