Li Xiang, Yuan Yan, Dang Pengze, Li Bo-Lin, Huang Yong, Li Wei, Zhang Mao, Shi Miao, Shen Ziqi, Xie Linyan
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China.
Sci Total Environ. 2023 Jun 20;878:162982. doi: 10.1016/j.scitotenv.2023.162982. Epub 2023 Mar 22.
The effects of salinity on anaerobic nitrogen and sulfide removal were investigated in a coupled anammox and short-cut sulfur autotrophic denitrification (SSADN) system. The results revealed that salinity had significant nonlinear effects on the nitrogen and sulfur transformations in the coupled system. When the salinity was <2 %, the anammox and SSADN activities increased with increasing salinity, and the total nitrogen removal rate, S production rate, and nitrite production rate were 0.41 kg/(m·d), 0.37 kg/(m·d), and 0.28 kg/(m·d), respectively. With continuous increase of salinity, the performances of the anammox and SSADN gradually decreased, and the three indicators decreased to 0.14 kg/(m·d), 0.22 kg/(m·d), and 0.14 kg/(m·d) at 5 % salinity, respectively. When the salinity reached 5 %, the nitrogen removal contribution of anammox decreased to 68.4 %, while the contribution of the sulfur autotrophic denitrification increased to 31.6 %. The coupled system recovered in a short time after alleviation of the salinity stress, and the SSADN activity recovery was faster than anammox. The microbial community structure and functional microbial abundance in the coupled system changed significantly with increasing salinity, and the functional microbial abundance after recovery was considerably different from the initial state.
在厌氧氨氧化与短程硫自养反硝化（SSADN）耦合系统中研究了盐度对厌氧氮和硫化物去除的影响。结果表明，盐度对耦合系统中的氮和硫转化具有显著的非线性影响。当盐度<2%时，厌氧氨氧化和SSADN活性随盐度增加而升高，总氮去除率、硫生成率和亚硝酸盐生成率分别为0.41 kg/(m³·d)、0.37 kg/(m³·d)和0.28 kg/(m³·d)。随着盐度持续升高，厌氧氨氧化和SSADN的性能逐渐下降，在盐度为5%时，这三个指标分别降至0.14 kg/(m³·d)、0.22 kg/(m³·d)和0.14 kg/(m³·d)。当盐度达到5%时，厌氧氨氧化的氮去除贡献降至68.4%，而硫自养反硝化的贡献增至31.6%。盐度胁迫缓解后，耦合系统在短时间内恢复，且SSADN活性恢复比厌氧氨氧化更快。耦合系统中的微生物群落结构和功能微生物丰度随盐度增加而显著变化，恢复后的功能微生物丰度与初始状态有很大差异。
