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| Effect of sulfur-containing additives on methane and odor emissions during pig manure composting |
| Received:August 29, 2021 |
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| KeyWord:compost;pig manure;sulfur additive;methane emission;gas emission |
| Author Name | Affiliation | E-mail | | YAN Zhaowei | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | YANG Feiyu | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | GAO Xingzu | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | CHEN Jie | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | LI Shiyu | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | LI Guoxue | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | LUO Wenhai | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environment, China Agricultural University, Beijing 100193, China | luowenhai@cau.edu.cn |
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| Abstract: |
| This study aimed to identify suitable sulfur-containing additives for the effective control of methane and odor emissions from composting processes. In this study, we used phosphogypsum(PG), calcium superphosphate(SP), and sodium sulfate(NS)as additives in a 60 L barrel fermenter with forced ventilation and aeration to investigate the effects of different sulfur-containing additives on gas emissions during the composting of pig manure. The results showed that the addition of 2% PG, 2% SP, and 1.2% NS to the compost raw material reduced methane emissions by 50.8%, 43.3%, and 46.6%, respectively. PG and SP treatments reduced ammonia volatilization by 40.6% and 37.2%, respectively, and NS treatment reduced ammonia volatilization by 20.0%. PG and SP treatments did not have a substantial inhibitory effect on hydrogen sulfide gas emissions; hydrogen sulfide emission from NS treatment was 3.8 times higher than that of the control treatment, and the seed germination rate at the end of composting in the NS treatment was only 41.3%. In summary, the addition of 1.2% NS treatment is not suitable as an odor reduction strategy, but the addition of 2% PG and 2% SP and other low-sulfur additives is more appropriate. |
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