Low-carbon Water Environment Technology Research Center, School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
Low-carbon Water Environment Technology Research Center, School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
Environ Res. 2024 Jan 1;240(Pt 1):117510. doi: 10.1016/j.envres.2023.117510. Epub 2023 Oct 27.
The ultrashort-sludge retention time activate sludge (USAS) process is considered promising for the recovery of energy and resource from wastewater. In this study, we developed five USAS systems (with sludge retention time (SRT) of 0.5, 1, 2, 3, and 4 d), and investigated the nitrogen and phosphorus removal, as well as the microbial community, in the USAS systems. The results revealed that the activated sludge in the USAS system with a shorter SRT can capture more organic matter from wastewater, with organic matter mineralization, capture, and loss rates of 12.9-45.9, 42.4-62.3, and 18.2-24.8%, respectively. In addition, ammonia oxidization only occurred in the USAS systems with SRTs of 3 and 4 d, and all the USAS systems with different SRTs exhibited phosphorus-removal ability. The microbial community analysis results revealed that the relative abundance of nitrifying and denitrifying bacteria (such as Thauera) increased with an increase in the SRT.
短污泥停留时间活性污泥（USAS）工艺被认为是从废水中回收能源和资源的有前途的方法。在本研究中，我们开发了五个 USAS 系统（污泥停留时间（SRT）分别为 0.5、1、2、3 和 4 d），并研究了 USAS 系统中的氮磷去除以及微生物群落。结果表明，SRT 较短的 USAS 系统中的活性污泥可以从废水中捕获更多的有机物，有机物矿化、捕获和损失率分别为 12.9-45.9%、42.4-62.3%和 18.2-24.8%。此外，氨氧化仅发生在 SRT 为 3 和 4 d 的 USAS 系统中，并且所有具有不同 SRT 的 USAS 系统均具有除磷能力。微生物群落分析结果表明，硝化和反硝化细菌（如 Thauera）的相对丰度随着 SRT 的增加而增加。
