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| Comparative study of in situ and ectopic fermentation systems in piggery waste control |
| Received:March 12, 2021 |
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| KeyWord:in situ fermentation system;ectopic fermentation system;pig;waste;microbial community |
| Author Name | Affiliation | E-mail | | LI Luyao | Institute of Environment and Sustainable Development in Agriculture, Beijing 100081, China | | | WANG Hanqing | Feixi Old Hen Farming and Animal Husbandry Technology Co., Ltd., Hefei 230000, China | | | LI Yanling | Institute of Environment and Sustainable Development in Agriculture, Beijing 100081, China | | | LIU Xue | Institute of Environment and Sustainable Development in Agriculture, Beijing 100081, China | | | GENG Bing | Institute of Environment and Sustainable Development in Agriculture, Beijing 100081, China | gengbing2000@126.com |
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| Abstract: |
| This study aimed to compare the application method and pollution reduction capacity-related differences of the in situ and ectopic microbial fermentation systems. Therefore, we analyzed the treatment effects on pig breeding waste in the two systems under the same conditions. The results showed lower-level changes in the temperature and pH using the ectopic fermentation system, providing a more suitable environment for the thermophilic bacteria. The pigs weighed approximately 33 kg more in the ectopic fermentation system than those in the in situ fermentation system, the former system was thus more conducive to the growth of the animals. At the end of the fermentation process, the dominant bacteria in the in situ fermentation system at the different layers were Firmicutes, Proteobacteria, Chloroflexi, and Bacteroidetes, while those in the ectopic fermentation system were Firmicutes, Proteobacteria, and Actinobacteria. At the end of the experiment, the pig breeding wastewater absorption capacity of the litter was 1.96 in the ectopic fermentation system, representing better results than that of the padding in situ fermentation system(1.46). Compared with the in situ fermentation system, the ectopic fermentation system exhibited more stable temperature and pH values and the relative abundance of Bacillus mainly degrading bacteria was higher, improving the microbial fermentation process and promoting pig waste and rural straw degradation. |
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