相关实验视频

Updated: Jun 13, 2025

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Published on: September 26, 2016

阳离子对有氧颗粒的作用,用于侧流处理

Eunyoung Lee¹, Kyung Jin Min², Ah Hyun Lee¹

¹Department of Civil, Environmental and Plant Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea.

|September 17, 2024

概括

像 (Mg2+) 这样的酸盐增强了有氧颗粒污泥 (AGS) 的形成和稳定性,用于废水处理. 这改善了细胞外聚合物和污泥的粘附性,促进了可持续的碳排放减少.

科学领域:

环境科学环境科学
微生物学微生物学
化学工程是化学工程的重要组成部分.

背景情况:

有氧颗粒污泥 (AGS) 是一种可持续的技术,用于减少碳排放.
AGS的形成和结构稳定性是其实际应用的关键.
处理高强度废水需要强大的污泥颗粒.

研究的目的:

为了研究五个离子 (K +,Ca2 +,Mg2 +,Al3 +,Fe3 +) 对AGS形成和结构稳定的影响.
评估阴离子对细胞外聚合物物质 (EPS) 和污泥粘附的影响.
确定最佳的子,以加快AGS在高强度废水处理中的发展.

主要方法:

在污泥培养中引入五种不同的酸盐.
分析松结合的细胞外聚合物物质 (LB-EPS) 和总EPS含量.
测量蛋白质 (PN) /多糖 (PS) 比例和相对的疏水性.
评估污泥的粘附性和附着细胞的活力.

主要成果:

添加阳离子显著增加了LB-EPS和总EPS含量.
在所有阴离子治疗中,PN/PS比率增加,Mg2+显示最高值 (1.7).
相对的疏水性和PN/PS比率强烈影响了污泥的附着性,特别是Mg2+,Al3+和Fe3+.
2+导致附着细胞生存率最高 (96.8%).

结论:

在高强度废水处理中,Mg2+是增强AGS形成和结构稳定的最佳阴离子.
在EPS含量和结构中受到阴离子诱导的改善促进了更好的污泥粘附和微生物活性.
本研究提供了关于优化AGS技术以实现可持续废水管理的见解.

关键词:

有氧颗粒是有氧的颗粒.生物质附着性生物质附着性它们的分类.细胞外聚合物质是一种细胞外聚合物质.相对的疏水性是相对的疏水性.

更多相关视频

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Published on: October 15, 2015

Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency

Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency

Published on: September 11, 2016

相关概念视频

Coagulation

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...

Colloidal precipitates

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

Qualitative Analysis

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...