相关实验视频

Updated: Jun 30, 2025

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Published on: October 7, 2020

从低强度废水中对各种碳源进行评估,评估氨和的同化和脱的的去除,在经过修改的无氧-无氧-氧化工艺中进行

Guanglin Zhang¹, Weiguang Li², Shuncai Wang¹

¹School of Environment, Harbin Institute of Technology, Harbin 150090, China.

The Science of the total environment

|March 23, 2024

概括

在废水处理中,添加乙酸盐有效地增强了氨同化和非化去除 (DPR). 这项研究强调了微生物在营养恢复中的作用,为优化和去除过程提供了洞察力.

科学领域:

环境科学与工程环境科学与工程
微生物学微生物学
水处理技术水处理技术

背景情况:

污水处理厂 (WWTP) 在有效去除 (N) 和 (P) 方面面临着挑战.
修改后的无氧-无氧-有氧 (MAAO) 工艺为同时去除和恢复营养提供了潜力.
外部碳来源对于优化生物营养去除过程至关重要.

研究的目的:

为了研究不同外部碳来源 (乙酸盐,葡萄糖,乙酸盐/酸盐) 对MAAO过程的影响.
评估对氨同化,非化去除 (DPR) 和微生物群落结构的影响.
确定从低强度废水中有效去除和回收N和P的最佳条件.

主要方法:

试点规模的连续流量MAAO反应堆运行.
添加不同的外部碳来源:乙酸,葡萄糖和乙酸/酸.
监测氨同化,DPR和微生物群落的分析.

主要成果:

乙酸盐显著增强了氨同化 (50.0%) 和DPR (60.0%).
蛋白质细菌和细菌杆菌是氨同化中的关键;非化积聚生物 (DPAO) 推动了N和P的去除.
乙/酸盐促进了DPR (77.7%) 和内源性脱 (37.9%),而葡萄糖则有利于异质性脱 (29.6%),对同化的影响最小.

结论:

乙酸盐是MAAO过程中联合氨和DPR的高效碳来源.
特定的微生物群体,包括DPAO和脱型糖原积聚生物 (DGAO),对于稳定的N和P去除和恢复至关重要.
碳来源的选择显著影响了WWTP中营养去除途径的效率.

关键词:

乙酸乙酸盐的使用方法氨的同化方式氨的同化方式脱化除除的方法外部碳来源外部碳来源低强度的废水处理器

更多相关视频

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Published on: January 22, 2015

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

Published on: December 6, 2018

相关概念视频

Overview of Nitrogen Metabolism

Overview of Nitrogen Metabolism

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...

Factors Affecting Solubility

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.