Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw
Aeration is an important factor to regulate composting efficiency and nitrogen loss. This study is aimed to compare the effects of different aeration modes (continuous and intermittent) and aeration rate on nitrogen conversion and bacterial community in composting from dehydrated sludge and corn str...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-03-01
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| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2024.1372568/full |
| _version_ | 1827320476479782912 |
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| author | Yuyun Wang PengXiang Xu PengXiang Xu PengXiang Xu Yue Wang Yue Wang Jing Su Zhi Xu Zhengbo Jiang Zhengbo Jiang Yuquan Wei Yuquan Wei Sheng Hang Sheng Hang Xiaoyan Ding Xiaoyan Ding Hao Zhang Longli Zhang Yongdi Liu Yongdi Liu Ji Li Ji Li |
| author_facet | Yuyun Wang PengXiang Xu PengXiang Xu PengXiang Xu Yue Wang Yue Wang Jing Su Zhi Xu Zhengbo Jiang Zhengbo Jiang Yuquan Wei Yuquan Wei Sheng Hang Sheng Hang Xiaoyan Ding Xiaoyan Ding Hao Zhang Longli Zhang Yongdi Liu Yongdi Liu Ji Li Ji Li |
| author_sort | Yuyun Wang |
| collection | DOAJ |
| description | Aeration is an important factor to regulate composting efficiency and nitrogen loss. This study is aimed to compare the effects of different aeration modes (continuous and intermittent) and aeration rate on nitrogen conversion and bacterial community in composting from dehydrated sludge and corn straw. Results showed that the intermittent aeration mode at same aeration volume was superior to the continuous aeration mode in terms of NH3 emission reduction, nitrogen conversion and germination index (GI) improvement. Intermittent aeration mode with 1200 L/h (aeration 5 min, stop 15 min) [K5T15 (V1200)] and 300 L/h of continuous aeration helped to the conservation of nitrogen fractions and accelerate the composting process. However, it was most advantageous to use 150 L/h of continuous aeration to reduce NH3 emission and ensure the effective composting process. The aeration mode K5T15 (V1200) showed the fastest temperature rise, the longer duration of thermophilic stage and the highest GI (95%) in composting. The cumulative NH3 emission of intermittent aeration mode was higher than continuous aeration mode. The cumulative NH3 emission of V300 was 23.1% lower than that of K5T15 (V1200). The dominant phyla in dehydrated sludge and corn straw composting were Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes. The dominant phylum in the thermophilic stage was Firmicutes (49.39%~63.13%), and the dominant genus was Thermobifida (18.62%~30.16%). The relative abundance of Firmicutes was greater in the intermittent aeration mode (63.13%) than that in the continuous aeration mode (57.62%), and Pseudomonas was dominant in composting with lower aeration rate and the lowest NH3 emission. This study suggested that adjustment to the aeration mode and rate could affect core bacteria to reduce the nitrogen loss and accelerate composting process. |
| first_indexed | 2024-04-25T00:46:58Z |
| format | Article |
| id | doaj.art-f4cbd4b9d0fe4ca2ac774220a52b1b91 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-25T00:46:58Z |
| publishDate | 2024-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-f4cbd4b9d0fe4ca2ac774220a52b1b912024-03-12T04:49:08ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2024-03-011510.3389/fmicb.2024.13725681372568Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn strawYuyun Wang0PengXiang Xu1PengXiang Xu2PengXiang Xu3Yue Wang4Yue Wang5Jing Su6Zhi Xu7Zhengbo Jiang8Zhengbo Jiang9Yuquan Wei10Yuquan Wei11Sheng Hang12Sheng Hang13Xiaoyan Ding14Xiaoyan Ding15Hao Zhang16Longli Zhang17Yongdi Liu18Yongdi Liu19Ji Li20Ji Li21College of Resources and Environmental Science, Yunnan Agricultural University, Kunming, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaAcademy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaNanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, ChinaCollege of Resources and Environmental Science, Yunnan Agricultural University, Kunming, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaTechnical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, ChinaBeijing VOTO Biotech Co., Ltd., Beijing, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaBeijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Science, China Agricultural University, Beijing, ChinaOrganic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, ChinaAeration is an important factor to regulate composting efficiency and nitrogen loss. This study is aimed to compare the effects of different aeration modes (continuous and intermittent) and aeration rate on nitrogen conversion and bacterial community in composting from dehydrated sludge and corn straw. Results showed that the intermittent aeration mode at same aeration volume was superior to the continuous aeration mode in terms of NH3 emission reduction, nitrogen conversion and germination index (GI) improvement. Intermittent aeration mode with 1200 L/h (aeration 5 min, stop 15 min) [K5T15 (V1200)] and 300 L/h of continuous aeration helped to the conservation of nitrogen fractions and accelerate the composting process. However, it was most advantageous to use 150 L/h of continuous aeration to reduce NH3 emission and ensure the effective composting process. The aeration mode K5T15 (V1200) showed the fastest temperature rise, the longer duration of thermophilic stage and the highest GI (95%) in composting. The cumulative NH3 emission of intermittent aeration mode was higher than continuous aeration mode. The cumulative NH3 emission of V300 was 23.1% lower than that of K5T15 (V1200). The dominant phyla in dehydrated sludge and corn straw composting were Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes. The dominant phylum in the thermophilic stage was Firmicutes (49.39%~63.13%), and the dominant genus was Thermobifida (18.62%~30.16%). The relative abundance of Firmicutes was greater in the intermittent aeration mode (63.13%) than that in the continuous aeration mode (57.62%), and Pseudomonas was dominant in composting with lower aeration rate and the lowest NH3 emission. This study suggested that adjustment to the aeration mode and rate could affect core bacteria to reduce the nitrogen loss and accelerate composting process.https://www.frontiersin.org/articles/10.3389/fmicb.2024.1372568/fullcompostingaeration modesaeration ratesnitrogen fractions conversionNH3 emission |
| spellingShingle | Yuyun Wang PengXiang Xu PengXiang Xu PengXiang Xu Yue Wang Yue Wang Jing Su Zhi Xu Zhengbo Jiang Zhengbo Jiang Yuquan Wei Yuquan Wei Sheng Hang Sheng Hang Xiaoyan Ding Xiaoyan Ding Hao Zhang Longli Zhang Yongdi Liu Yongdi Liu Ji Li Ji Li Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw Frontiers in Microbiology composting aeration modes aeration rates nitrogen fractions conversion NH3 emission |
| title | Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw |
| title_full | Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw |
| title_fullStr | Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw |
| title_full_unstemmed | Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw |
| title_short | Effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw |
| title_sort | effects of aeration modes and rates on nitrogen conversion and bacterial community in composting of dehydrated sludge and corn straw |
| topic | composting aeration modes aeration rates nitrogen fractions conversion NH3 emission |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2024.1372568/full |
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