溶解氧度对集成固膜活性污泥测序批量反应堆同时化和脱的性能和机制的影响
Yaruo Jin1, Jie Ding1, Wei Zhan1
1State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
Bioresource technology
|August 6, 2023
概括
这项研究发现,低水平的溶氧 (DO) 在集成固膜活性污泥 (IFAS) 系统中增强了同时的化和脱化 (SND). 在0.5 mg/L DO下获得最佳性能,提高了去除效率.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 水处理工程水处理工程
背景情况:
- 集成的固膜活性污泥 (IFAS) 系统对同时化和脱化 (SND) 有效.
- 溶解氧 (DO) 度对SNDIFAS表现的确切影响仍然不完全理解.
研究的目的:
- 调查DO集中对IFAS系统中SND的业绩和潜在机制的影响.
- 确定最佳的DO水平,以最大限度地提高IFAS中除效率.
主要方法:
- 在不同的DO度下对IFAS系统进行实验研究.
- 对SND和总去除效率的分析.
- 使用高通量测序进行微生物社区分析.
- 同时发生的网络分析以阐明微生物相互作用.
主要成果:
- 与控制系统相比,IFAS系统表现出更高的性能.
- 在0.5 mg/L的DO度下,可以达到最佳的SND效率 (88.51%) 和总去除 (82.78%).
- 有限的DO促进了SND,生物膜显示高生物质和脱活性,随着DO的减少.
- 低DO有利于SND和非传统的去除途径的丰富功能基因.
结论:
- 溶解氧度显著影响IFAS系统的同时化和脱的性能.
- 在IFAS中,约0.5mg/L的低DO度是最大限度地提高SND和去除的最佳条件.
- 微生物群落的结构和功能,包括特定去除途径的普遍性,受到DO水平的强烈影响.
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