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Fluorescence Spectra Characteristics of Dissolved Organic Matter in Mesophilic Anaerobic Digestion of Pig and Dairy Manure Slurries

文献类型： 外文期刊

作者： Lou Meng-han 1 ; Jin Hong-mei 2 ; Liang Dong 2 ; Zhu Yan-yun 2 ; Zhu Ning 2 ; Li Dan-yang 2 ;

作者机构： 1.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Crop & Livestock Integrated Farming, Nanjing 210014, Peoples R China

4.Jiangsu Collaborat Innovat Ctr Solid Organ Waste, Nanjing 210095, Peoples R China

关键词： Pig and dairy manure slurries; Mesophilic anaerobic digestion; Dissolved organic matter; Three-dimensional fluorescence; Parallel factor analysis

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.609； 五年影响因子：0.516 ）

ISSN： 1000-0593

年卷期： 2022 年 42 卷 1 期

页码：

收录情况： SCI

摘要： The potential environmental effects of fecal water are determined by the composition changes of substances. Dissolved organic matter (DOM) is an important component of fecal water. In this study, the content of DOM in pig and dairy manure slurries was analyzed by batch mesophilic anaerobic fermentation with a total solid concentration (TS) of 4% and 8%, respectively. DOM's fluorescence spectrum characteristics and component variation characteristics in raw and digested slurries were analyzed by three-dimensional fluorescence spectroscopy (3DEEM) and parallel factor analysis (PARAFAC). After mesophilic anaerobic fermentation, there sults showed that DOM content in slurries decreased significantly (p<0.001). DOM of manure slurries mainly contained four fluorescent components: tyrosine like, fulvic acid like, tryptophan like and humic acid like. The relative content of humic acid increased significantly (p<0.05), but the relative content of fulvic acid increased only in the treatment of TS=8% but decreased in TS=4%. The humification index of DOM in digested slurries increased significantly (p < 0.01), but the humification degree of DOM in pig manure slurries was significantly higher than that in dairy manure slurries. The results can provide theoretical support for evaluating potential environmental effects of livestock manure slurries utilization in farmland.

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