School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road, No. 13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Yulin Ecological Environment Monitoring Station, High-tech Zone Xingda Road, Yulin 719000, China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road, No. 13, Xi'an 710055, China.
Sci Total Environ. 2023 Feb 25;861:160558. doi: 10.1016/j.scitotenv.2022.160558. Epub 2022 Nov 28.
The study investigated the response characteristics of algal-bacterial granular sludge (ABGS) under salinity stress (0 % → 2 %). At 1 % salinity, the sludge performance was inhibited, while recovered rapidly, indicating the ABGS exhibited resistance. However, at 2 % salinity, the suppressed performances did not recover until the stress was eliminated. Under salinity stress, the nutrient removal capacity of the system and the composition and chemical characteristics of extracellular polymers substances also changed. Meanwhile, the ABGS formed adaptation to salinity stress in the early coping process. As a result, the effect of the second 2 % salinity on ABGS was significantly weakened. High-throughput sequencing results showed that the microbial community in ABGS shifted under salinity stress, and the halophilic bacteria genera Arcobacter, Denitromonas, Azoarcus, etc. were enriched, which might be the genetic basis of the adaptation.
该研究调查了盐度胁迫下（0%→2%）藻-菌颗粒污泥（ABGS）的响应特性。在 1%盐度下，污泥性能受到抑制，但恢复迅速，表明 ABGS 表现出抗性。然而，在 2%盐度下，抑制作用并未恢复，直到压力消除。在盐度胁迫下，系统的养分去除能力以及胞外聚合物物质的组成和化学特性也发生了变化。同时，ABGS 在早期应对过程中形成了对盐度胁迫的适应。因此，第二次 2%盐度对 ABGS 的影响显著减弱。高通量测序结果表明，ABGS 中的微生物群落在盐度胁迫下发生了变化，嗜盐菌属 Arcobacter、Denitromonas、Azoarcus 等得到了富集，这可能是适应的遗传基础。
