在污水处理的高速无氧/微空气系统中获得了卓越的非化去除
Xiaojie Luo1, Mengya Guo1, Xiangnan Zheng1
1School of Environment, MOE Key Laboratory of Water and Sediment Sciences/State Key Lab of Water Environment Simulation, Beijing Normal University, Beijing, 100875, China.
Chemosphere
|August 3, 2023
概括
在微空气活性污泥系统中引入无氧区显著增加了和的去除. 这种修改提高了污泥的含量,改变了聚酸盐积聚生物群落,同时减少了废污泥的产生.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 废水处理 废水处理
背景情况:
- 加强生物去除 (EBPR) 对于废水处理至关重要.
- 微空气活性污泥 (MAS) 系统具有高处理能力,但需要优化营养去除.
- 无氧区与微空气条件对营养物质去除的作用需要进一步研究.
研究的目的:
- 评估将无氧区引入高速微空气活性污泥 (MAS) 系统的影响.
- 调查对和去除效率,污泥特性和微生物群落的影响.
- 为了比较高速无氧/微空气 (A/M) 系统与传统的生物营养去除过程的性能.
主要方法:
- 实施高速无氧/微空气 (A/M) 系统用于污水处理.
- 对废水中营养物质度 (NOx-N,总,总) 和污泥含量的性能监测.
- 高通量热测序用于分析聚酸盐积聚生物 (PAO) 和氨氧化细菌群体.
主要成果:
- 该A/M系统显著降低了废水NOx-N (7.2至1.5毫克/升),并增强了总 (75%至89%) 和总 (18%至60%) 的去除.
- 污泥中的含量由1.48%增加到1.77% (干重) 由于无氧化去除.
- 无毒区的引入使PAO总丰度降低了42%,但没有影响去化PAO;它使氨氧化细菌增加了39%.
结论:
- 将无氧区引入高速的MAS系统有效地增强了生物营养物质的去除.
- A/M工艺表现出优越的性能,降低了通风,容量更高,COD需求更低,废物污泥明显减少.
- 微生物社区分析揭示了PAO和氨氧化细菌在A/M条件下的利基区分和适应.
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