上游毛毯过器anammox (UBFA) 系统处理低废水:高效的去除,颗粒形成,N2O排放和微生物继承
Chongyang Wang1,2, Feng Gao3,4, Sheng Gao1
1Power China Kunming Survey, Design and Research Institute Company Limited, Kunming, 650051, China.
Bioprocess and biosystems engineering
|December 9, 2024
概括
这项研究培养了Anammox颗粒污泥 (AnGS) 在一个上游布毯过器Anammox (UBFA) 系统中,用于低废水处理. 优化的系统显示Anammox活性增加,污泥流量减少.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 废水处理工程 废水处理工程
背景情况:
- 低废水带来了环境挑战.
- 无氧氨氧化 (Anammox) 是去除的关键过程.
- 优化Anammox颗粒污泥 (AnGS) 对于有效的废水处理至关重要.
研究的目的:
- 在上游膜过器Anammox (UBFA) 系统中培养Anammox颗粒污泥 (AnGS).
- 在最佳条件下研究AnGS的特性和性能.
- 探索AnGS结构,微生物群落和Anammox活动之间的关系.
主要方法:
- 通过缩短液压保留时间,在上游膜过器Anammox (UBFA) 系统中培养Anammox颗粒污泥 (AnGS).
- 分析AnGS特征,包括尺寸分布,污泥体积指数 (SVI) 和蛋白质/多糖含量 (PN/PS).
- 微电极追踪以确定Anammox的空间分布和颗粒中的脱活动.
主要成果:
- 在UBFA系统中成功种植AnGS,中等颗粒 (1.0-2.0毫米) 从0%增加到28.5%.
- 污泥流体 (0-200微米) 的减少,从84.5%降至17.6%,表明污泥沉降能力有所改善.
- 识别Candidatus Brocadia和Candidatus Kuenenia作为主导的Anammox物种,在中等颗粒中存在较高的Anammox细菌 (AnAOB).
结论:
- 缩短液压保留时间有效地促进了UBFA系统中Anammox颗粒污泥 (AnGS) 的形成和成熟.
- 开发的AnGS表现出增强的Anammox活性和改善的污泥特性,适用于低废水处理.
- 了解AnGS内的微生物活动的空间分布对于优化去除效率至关重要.
相关概念视频
Overview of Nitrogen Metabolism
7.8K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.8K
Metabolism of Chemolithotrophs
2
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
2
Filtration
789
Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
789
The Nitrogen Cycle
51.6K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
51.6K
Laminar Flow
623
Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
623


