| Title: | "Effect of nitrite on hydrolysis-acidification, biogas production and microbial community in semi-continuous two-phase anaerobic digestion of sewage sludge" |
| Author(s): | Sheng Q; Lu Y; Yuan S; Li X; Dai X; Guo Y; Dong B; |
| Address: | "State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. School of Environmental and Chemical Engineering, Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai University, Shanghai 200444, China. Electronic address: lixiaowei419@shu.edu.cn. Shanghai Investigation Design & Research Institute Co. Ltd., Shanghai 200335, China. State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Investigation Design & Research Institute Co. Ltd., Shanghai 200335, China; YANGTZE Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China. Electronic address: dongbin@tongji.edu.cn" |
| DOI: | 10.1016/j.jes.2022.05.020 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "Previous study found that the pre-treatment of sewage sludge with nitrite improves the biogas production during the mono/two-phase anaerobic digestion (AD) using batch biochemical methane potential tests. In this study, the effects of nitrite on hydrolysis-acidification, biogas production, volatile solids destruction and microbial composition in semi-continuous two-phase AD of sewage sludge were investigated. The addition of nitrite promotes sludge organic matter solubilization (+484%) and VFAs production (+98.9%), and causes an increase in the VS degradation rate during the AD process (+8.7%). The comparison of biogas production from the acidogenic and methanogenic reactors with or without the addition of nitrite implies that the nitrite has no significant effect on the overall biogas production of two-phase sludge AD process. High-throughput sequencing analysis shows that the microbial communities of bacteria and archaea in two-phase AD reactors significantly changes after the addition of nitrite. Vulcanibacillus (bacteria) and Candidatus Methanofastidiosum (archaea) become the dominant genera in the acidogenic and methanogenic reactors with the nitrite respectively. These findings provide new insights about using nitrite to promote the organic matter degradation of sewage sludge in a semi-continuous two-phase AD system" |
| Keywords: | Nitrites Sewage Biofuels Hydrolysis *Microbiota *Euryarchaeota Archaea Bioenergy Methane production Nitrite Semi-continuous two-phase anaerobic digestion Sewage sludge; |
| Notes: | "MedlineSheng, Qian Lu, Yiqing Yuan, Shijie Li, Xiaowei Dai, Xiaohu Guo, Yali Dong, Bin eng Netherlands 2022/12/13 J Environ Sci (China). 2023 Apr; 126:434-444. doi: 10.1016/j.jes.2022.05.020. Epub 2022 May 22" |
