Odor emissions and humification during composting of pig manure and cornstalks: Role of mixing proportions

文献类型： 外文期刊

第一作者： Shi, Yixun

作者： Shi, Yixun;Gu, Xuhan;Song, Jingchen;Li, Hui;Sun, Cun;Wang, Jiahui;Li, Shuyan;Li, Jijin;Liu, Wen;Bu, Guoxiang;Wang, Hongbin

作者机构：

关键词： Composting; Material mixing proportion; Odor; Compost humification; Two-dimensional correlation spectroscopy of; infrared spectrum (FTIR-2DCOS)

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 5 期

页码：

收录情况： SCI

摘要： This study investigated odor (i.e. ammonia and hydrogen sulfide) emissions and humification in co-composting of pig manure and cornstalks. Effects of feedstock mixing proportions on composting performance were evaluated. Pig manure and cornstalks were thoroughly blended with the ratio of 3:1, 6:1 and 9:1 (wet weight), respectively. Results showed that the thermophilic stage was long enough in all treatments to satisfy maturity, non-phytotoxicity and sanitation requirements. Odor emissions especially ammonia emission aggravated with the decrease of cornstalks addition. In addition, matrix oxygen content was the main factor affecting odor emissions. The multiple nonlinear regression models could better simulate odor emissions than the linear ones. Pig manure and cornstalks mixed with 6:1 improved the humic acid/fulvic acid to 12.22 and strengthened the earlier lignin humification and later Maillard reaction to promote the composting humification and stability by the two-dimensional correlation spectroscopy of infrared spectrum. Additionally, mixing pig manure and cornstalks at a ratio of 3:1 improved the compost quality index and also mitigated NH3 and H2S emissions by 64 % - 71 % and 30 % - 32 %, respectively. Thus, comprehensive evolution of odor emissions, compost humification and stability, pig manure and cornstalks co-composted with the ratios of (3-6):1 were recommended to be applied in practice.

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