微量过滤Ult的区别是什么rafiltration and Nanofiltration

这微滤到超滤和纳米过滤之间的关键差异is the size of pores in their membranes. Microfiltration uses membranes with microscale size pores, while ultrafiltration uses membranes with microscale pore size, but the pore size is designed in such a way that a pore is about one-tenth of the particle size. Nanofiltration, on the other hand, uses membranes with nanoscale pores.

All microfiltration, ultrafiltration and nanofiltration are types of膜过滤有用的分析技术分离过程。这些方法主要用作过程中的净化步骤。

内容

1.概述和关键差异
2.什么是微滤
3。What is Ultrafiltration
4。What is Nanofiltration
5。微滤与超滤与表格形式的纳米过滤
6。Summary – Microfiltration vs Ultrafiltration vs Nanofiltration

什么是微滤？

Microfiltration is an analytical technique that is useful for filtration. A contaminated fluid can be passed through a membrane having microscale pores in order to separate the microorganisms and suspended particles from this liquid. This analytical technique is commonly used in conjunction with various other separation processes, including ultrafiltration and反渗透。这提供了不包含任何不希望污染物的产品流。

Usually, microfiltration serves as a pre-treatment method that is important in separation techniques such as ultrafiltration. Moreover, we can use it as a post-treatment step for granular media filtration processes. Typically, the pore size for microfiltration ranges from 0.1 to 10 micrometers. The membranes used for this filtration are specifically designed to prevent the passing of sediments, algae, protozoa, and large bacteria. Furthermore, these filters tend to allow the passing of ionic materials such as water molecules, monovalent species such as sodium and chloride ions, natural organic matter that are dissolved in the fluid, small colloids, and viruses.

In this method of the microfiltration process, we need to pass the fluid through the membrane with a high velocity (about 1-3m/s). Here, we can use a low to moderate pressure that is parallel or tangential to the semi-permeable membrane. The membrane is typically in a sheet form or a tabular form. We can use a pump to allow the fluid to pass through the membrane filter. This pump can be either pressure-driven or vacuum.

有几种微滤物的应用，包括去除原生动物，去除浊度等病原体的水处理。灭菌，石油炼油，乳制品加工，细胞汤的澄清和纯化，葡萄糖的澄清等。

什么是超滤？

Ultrafiltration is an analytical technique in which a force such as pressure or concentration gradient is used for the separation through a semi-permeable membrane. In this method, the suspended solids having a high molecular weight cannot pass through the membrane while water and low molecular solutes can pass through. The residue that cannot pass through the membrane is known as the retentate, whereas the portion that can pass through the filter is known as the permeate or filtrate. This method is useful in purifying and concentrating steps.

Fundamentally, ultrafiltration is similar to microfiltration because both these techniques perform separation according to the size exclusion or particle capture method. However, it is fundamentally different from membrane gas separation because the latter involves separation using absorption techniques and diffusion.

通常，超滤中使用的膜的孔径必须是要分开的粒径的十分之一。因此，它限制了通过膜进入大颗粒。但是，它还限制了小颗粒通过毛孔进入，并将其吸附到孔表面。它们可以阻止入口，因此我们需要对跨流速度进行简单调整以驱动颗粒。

What is Nanofiltration?

Nanofiltration is an analytical technique that uses membrane filtration mainly to soften and disinfect water. It is a type of membrane filtration method using pore size in nanoscale. The pore size ranges from 1-10nm. This pore size is smaller than pore sizes in microfiltration and ultrafiltration. But the pore size is comparatively larger than the pore size in reverse osmosis.

Typically, the membranes that we can use for the preparation of the membranes used in nanofiltration are polymer thin films. We can use materials such as polyethylene terephthalate or metals such as aluminum to prepare this kind of membrane film. We can also control the pore dimensions of these membranes by controlling the pH, temperature and time needed for pore development.

纳米过滤技术有许多不同的用途，包括精细的化学和药物，石油和石油化学，散装化学，医学，天然精油和类似产品的生产等。

微量过滤Ult的区别是什么rafiltration and Nanofiltration?

这微滤到超滤和纳米过滤之间的关键差异is the size of pores in their membranes. Microfiltration uses membranes with microscale size pores, while ultrafiltration uses membranes with microscale pore size, but the pore size is designed in such a way that a pore is about one-tenth of the particle size. Nanofiltration, on the other hand, uses membranes with nanoscale pores.

以下信息图列出了与表格形式的微滤到超滤和纳米滤过之间的差异，以与并排比较。

Summary – Microfiltration vs Ultrafiltration vs Nanofiltration

微滤，超滤和纳米过滤是对分离过程有用的膜过滤分析技术的类型。微滤使用具有微观尺寸孔的膜，而超滤则使用具有微观孔径的膜，但是孔径的设计方式使孔的十分之一约为粒径的十分之一。另一方面，纳米过滤使用纳米级孔的膜。因此，这是微滤到超滤和纳米过滤之间的关键差异。

Reference:

1.“”Microfiltration“。概述|ScienceDirect主题。

Image Courtesy:

1.“”Overall setup for the Microfiltration system” Jeraz Cooper/Enrico Martini - 在Microsoft Visio上绘制（CC BY-SA 3.0）通过Commons Wikimedia
2. “横流” CEIC3004 24 - 自己的工作（CC BY-SA 3.0）通过Commons Wikimedia
3.“”工艺图纳米滤清” Natttyc - 自己的工作（CC BY-SA 3.0）通过Commons Wikimedia