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| Effects of ectopic microbial fermentation on the treatment of rural toilet black water |
| Received:April 02, 2021 |
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| KeyWord:ectopic fermentation system;rural toilet black water;microorganism;resourceful treatment |
| Author Name | Affiliation | E-mail | | LI Jiabin | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | | LI Luyao | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | | LIU Xue | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | | CHEN Zhuobo | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | | SONG Tingting | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | | ZHU Changxiong | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | | | GENG Bing | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China | gengbing2000@126.com |
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| Abstract: |
| In this study, microbial ectopic fermentation technology was used to treat black water from rural toilets, and changes in basic parameters, microbial abundance, and nutrient composition were explored. The results indicated that temperature first increased and then decreased, maintained at 40~57℃, the water content was 50%~65%, the pH value increased from 7.80 to 8.46, and the conductivity did not change significantly during the fermentation of black water. Bacteria were the most abundant microbes, with a magnitude of 107~108 CFU ·g-1, and the abundance of fungi and actinomycetes was 2~3 orders of magnitude lower than that of bacteria during ectopic fermentation. The seed germination index of the litter was 118.05%, indicating that waste litter was not toxic to crops. TN, TP, and TK increased significantly, whereas organic matter and C/N decreased significantly(P<0.05). The absorption coefficient of the litter in the black water was 2.51. At the end of the experiment, the total nutrient and organic matter content reached The Organic Fertilizer(NY 525-2012) standard, at 5.85% and 76.82%, respectively. |
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