在颗粒化过程中,盐的逐渐增加对性能和微生物群体的影响
Mengfei Wang1, Junguo He2, Xiangke Dong3
1School of Environment, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, China.
Journal of environmental sciences (China)
|July 13, 2024
概括
盐度影响有氧颗粒污泥的特性. 这项研究表明,虽然较高的盐度会影响稳定性,但有氧颗粒污泥对化学氧气需求 (COD) 和总 (TN) 等污染物保持了很好的去除效率.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
- 生物技术是生物技术.
背景情况:
- 盐度是影响有氧颗粒污泥 (AGS) 性能和微生物社区结构的关键因素.
- 了解不同盐度下的AGS颗粒化对于优化废水处理过程至关重要.
研究的目的:
- 在不同的盐度梯度下研究AGS的颗粒化过程和微生物群体动态.
- 评估逐步增加NaCl度对AGS特性和去除效率的影响.
主要方法:
- 两个相同的测序批量反应堆 (SBR) 经过分阶段的NaCl增量 (Ra为0-4g/L,Rb为0-10g/L) 运行.
- 监测污染物去除效率 (COD,TN,TP),颗粒特征和微生物群落组成.
- 对细胞外聚合物质 (EPS) 和参与化和脱的关键微生物群体的分析.
主要成果:
- 两台反应堆都实现了COD,TN和TP的优异清除效率,尽管在较高盐度反应堆 (Rb) 中化物积累较少.
- 度刺激了EPS分泌,丰富了产生EPS的细菌,增强了AGS的完整性和稳定性.
- 异质化细菌和非化细菌被确定为在盐水条件下去除营养的关键参与者.
结论:
- 有氧颗粒污泥具有弹性,即使在中度至高盐度条件下,也保持高处理效率.
- 在盐水环境中,EPS生产在稳定AGS结构和功能方面发挥着至关重要的作用.
- 微生物群体,特别是化和非化细菌,适应盐度,确保有效地去除营养.
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