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| Analysis of microbial community structure in the sediment of multi-stage purification ponds for swine wastewater treatment systems |
| Received:April 14, 2024 |
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| KeyWord:swine wastewater;purification pond;high-throughput sequencing;microbial community;environmental factor |
| Author Name | Affiliation | E-mail | | CHEN Zhongdian | Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Research Center of Circular Agriculture in Hilly, Fuzhou 350013, China | | | LUO Lijin | Fujian Institute of Microbiology, Fuzhou 350007, China | luolijin@sina.com | | ZHOU Liuting | Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Research Center of Circular Agriculture in Hilly, Fuzhou 350013, China | | | HUANG Xiaoyun | Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Research Center of Circular Agriculture in Hilly, Fuzhou 350013, China | | | NIE Yilei | Fujian Institute of Microbiology, Fuzhou 350007, China | | | HUANG Xiusheng | Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Research Center of Circular Agriculture in Hilly, Fuzhou 350013, China | | | WENG Boqi | Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China | | | FENG Deqing | Institute of Resources, Environment and Soil Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Research Center of Circular Agriculture in Hilly, Fuzhou 350013, China | koala-1011@163.com |
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| Abstract: |
| To explore the structure of microbial communities in the sediment of multi-stage purification pools within pig farm wastewater treatment systems and their interactions with environmental factors in the sediment, a multi-stage biological treatment and purification system was constructed, including Myriophyllum verticillatum L（T1）, Pistia stratiotes L （T2）, Azolla pinnata （T3）, Misgurnus anguillicaudatus （T4）, Pampus argenteus （T5）, and Nelumbo nucifera Gaertn （T6）. After six months of operation, the results of determining the physicochemical indicators of the sediment and the structure of the microbial community showed that throughout all purification stages, the Proteobacteria phylum consistently dominated the sediment; the Actinobacteriota and Firmicutes were more abundant in the initial treatment stage （T1） and significantly reduced in subsequent treatment pools. The relative abundance of Cyanobacteria, Acidobacteriota, and Desulfobacterota fluctuated greatly. In-depth analysis revealed that organic matter and total phosphorus were key environmental factors affecting the structure of microbial communities, with the content of organic matter showing a significant positive correlation with the abundance of unclassified genera of Syntrophales, Gaiellales, and Spirochaeta. Additionally, the denitrifying bacterium Candidatus Competibacter played a central role in the nitrogen cycle of the system. Therefore, the purification efficiency of the sewage treatment system can be improved by screening and using these specific functional bacteria for bioenhancement. |
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