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| Effects of reflux of mature compost on sulfur odor emission during pig manure composting |
| Received:July 31, 2021 |
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| KeyWord:mature compost;reflux method;covering method;compost mixing;sulfur odor |
| Author Name | Affiliation | E-mail | | YANG Jia | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | | | LI Guoxue | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | | | MA Ruonan | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | | | WANG Guoying | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | | | YUAN Jing | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | jingyuan@cau.edu.cn |
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| Abstract: |
| To explore the effects of different mature compost reflux methods on the emission of sulfur odors during composting, the covering and mixing methods of mature compost were designed, and the control treatment had no mature compost. The results showed that inoculating with mature compost increased the maturity of the final compost, and the seed germination index(GI)increased by 12.50% and 18.09%, respectively. Dimethyl sulfide(Me2S)and methyl disulfide(Me2SS)were the primary(> 90%)sulfur compounds released during composting, which were mainly emitted in the early stages of composting and after compost turning. The covering method and the mixing of mature compost method reduced Me2S emissions by 75.42% and 78.64%, respectively, and decreased Me2SS emissions by 35.58% and 56.17%, respectively. Subsequently, the reflux of mature compost reduced total sulfur odor emission by 39.42%~58.31%, and increased total sulfur(TS)content by 13.46%~24.07%, respectively. Generally, the addition of mature compost promote the maturity of compost and reduced sulfur-containing odor emissions and the mixing method showes the best performance. |
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