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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Study on the enhancement of anaerobic digestion of cattle manure by hydrothermal pretreatment and its mechanism

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水热预处理强化牛粪厌氧消化及机制研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jun.2025, Vol.48 No.6: 764-769

DOI: 10.3969/j.issn.1003-5060.2025.06.008

Authors

LI Keyu, WU Wentao, MA Ding, LIU Changhao, YUE Zhengbo, WANG Jin

(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: The hydrothermal pretreatment(HTP) for the cattle manure is beneficial to the stability of anaerobic digestion(AD). In this study, HTP was used to enhance the AD of cattle manure, and the effects of temperature and time on the characteristics of hydrothermal products and subsequent AD were investigated. The results show that with the increase of temperature, the carbon yield decreases and the chemical oxygen demand(COD) concentration in liquid products increases. The methane production of hydrothermal products at 180 ℃ is higher than that at 240 ℃, and the maximum methane production can be increased by 20.75% when hydrochar is added to liquid products at 180 ℃. The results of microbial analysis show that the relative abundance of Methanobacterium in the hydrothermal product group at 240 ℃ is significantly lower than that in the experimental group at 180 ℃, and the addition of hydrochar in the liquid product at 180 ℃ increases the relative abundance of Methanobacterium by 12.19%. The results have reference values for the optimization of anaerobic process of cattle manure enhanced by hydrothermal treatment.

Keywords: cattle manure; hydrothermal treatment; anaerobic digestion(AD); methane; hydrochar

作者信息

李科宇，吴文涛，马丁，刘昌昊，岳正波，王进

（合肥工业大学资源与环境工程学院，安徽合肥230009）

摘要和关键词

摘要: 对牛粪进行水热预处理(hydrothermal pretreatment, HTP)有助于提升厌氧消化的稳定性。文章通过水热预处理强化牛粪厌氧消化，探究温度和时间对水热产物特性及后续厌氧消化的影响。结果表明，随温度上升，产炭率降低，液体产物中化学需氧量(chemical oxygen demand, COD)质量浓度上升。180℃产物甲烷量高于240℃产物的产甲烷量，且180℃液体产物添加水热炭最高能提升20.75%的产甲烷量。微生物分析结果表明，240℃产物实验组中Methanobacterium相对丰度相比180℃实验组明显下降，180℃液体产物添加水热炭提升Methanobacterium相对丰度达12.19%。该研究结果对牛粪水热处理强化厌氧工艺优化有一定的参考价值。

关键词: 牛粪；水热处理；厌氧消化；甲烷；水热炭

Funding

国家自然科学基金区域创新发展联合基金资助项目（U19A20108）

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