Fan Wenjie, Huang Xuejiao, Xiong Jianhua, Wang Shuangfei
Guangxi University, Nanning, China.
Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, College of Agriculture, Guangxi University, Nanning, China.
Front Microbiol. 2024 Feb 14;15:1353965. doi: 10.3389/fmicb.2024.1353965. eCollection 2024.
In this study, we investigated the effects of salinity on elemental sulfur-driven autotrophic denitrification (SAD) efficiency, and microbial communities. The results revealed that when the salinity was ≤6 g/L, the nitrate removal efficiency in SAD increased with the increasing salinity reaching 95.53% at 6 g/L salinity. Above this salt concentration, the performance of SAD gradually decreased, and the nitrate removal efficiency decreased to 33.63% at 25 g/L salinity. Approximately 5 mg/L of the hazardous nitrite was detectable at 15 g/L salinity, but decreased at 25 g/L salinity, accompanied by the generation of ammonium. When the salinity was ≥15 g/L, the abundance of the salt-tolerant microorganisms, and , increased, while that of other microbial species decreased. This study provides support for the practical application of elemental sulfur-driven autotrophic denitrification in saline nitrate wastewater.
在本研究中，我们调查了盐度对元素硫驱动的自养反硝化（SAD）效率及微生物群落的影响。结果表明，当盐度≤6 g/L时，SAD中的硝酸盐去除效率随盐度增加而提高，在盐度为6 g/L时达到95.53%。高于此盐浓度时，SAD的性能逐渐下降，在盐度为25 g/L时硝酸盐去除效率降至33.63%。在盐度为15 g/L时可检测到约5 mg/L的有害亚硝酸盐，但在盐度为25 g/L时减少，同时伴有铵的生成。当盐度≥15 g/L时，耐盐微生物 和 的丰度增加，而其他微生物种类的丰度下降。本研究为元素硫驱动的自养反硝化在含盐硝酸盐废水处理中的实际应用提供了支持。
