Microza is brand name of Asahi Kasei's hollow fiber membrane separation technology

Cutting-Edge Hollow Fiber Membranes for Water Treatment and Wide Variety of Industrial Processes

From our extensive lineup of over 200 products,
we propose the separation process optimum to the needs of each industry.


Asahi Kasei Microza products are available in two categories:
microfiltration (MF) and ultrafiltration (UF)

Hollow fiber membrane, Microza

Industrial process microfiltration (MF)

Industrial process microfiltration (MF)

Membrane materials

Polyvinylidene difluoride (PVDF), polyethylene (PE)

Pore size

0.1 – 0.65μm


  • Pharmaceuticals
  • Food industry
  • Chemical industry
Industrial process ultrafiltration (UF)

Industrial process ultrafiltration (UF)

Membrane materials

Polysulfone (PSU)

Molecular weight cutoff

3,000 – 80,000 Da


  • Pharmaceuticals
  • Food industry
  • Chemical industry
  • Electrodeposition
  • Pharmaceutical water
Water treatment process (UF/MF)

Membrane Material: Polysufone(PSU), Polyvinylidene difluoride (PVDF)


  • LSI,
  • Potable Water
  • Industrial Water
  • Wastewater & Recycling

Systems for Microza

Membrane filtration systems

Membrane filtration systems

We design and manufactre membrane filtration systems, including those for test phase and large-scale facilities, by our software technology based on our knowledge.

Pencil and Laboratory-scale modules

For small-scale testing before the introduction of actual systems

Pencil and Laboratory-scale modules

See here for the use and testing methods.


We are offering diverse support services, including small and laboratory-scale testing,
manufacturing of commercial-scale membrane filtration systems and technical support after installation,
and support customers who use Microza products with satisfaction.

Product lineup

We have over 100 products and you can choose one optimum membrane from very wide range of lineup

Service until System Installation

We are also providing designing and manufacturing services of membrane filtration systems as well as hollow fiber membranes. Sample testing at Asahi Kasei R&D center and lending of testing equipment is also possible depending on your purpose.

Customer Support after Installation

To realize the stable operation of Microza installations, technical support is provided by a Japanese or oversea engineer whenever necessary. Analysis of used hollow fiber membranes is also available, facilitating you to find out the appropriate replacement period based on your filtration targets and operation conditions.

Contribution to SGDs

Microza has been widely used in various countries of the world in the process of recycling wastewater into industrial water by further purifying treated wastewater from sewage plants and industrial wastewater, greatly contributing to solving the water resource issue, which is one of the SDGs.


If you are consulting us for the first time, please see here first.



Some of the questions asked by our customers are posted.

Steps To Installation

Steps To Installation

Please see here for a detailed description of the technical support services of Asahi Kasei.

Microza’s offices

Microza’s offices

Microza’s offices and an outline of
Asahi Kasei are presented.

Microza has a history that dates back to the 1970s. Today, there are offices around the world to respond to the needs of customers in all parts of the world on separation technology.


The Membrane System Division of Asahi Kasei, which is a specialist in separation technology including hollow fiber membrane filtration, explains the basics of separation technology.

Differences and characteristics of separation technologies

The characteristics of separation technologies used for solid-liquid separation, including membrane filtration, are summarized.

What is membrane separation?

Classification of membrane filtration and target components are explained.

Structure of membrane modules

Membrane filtration, one of the separation technologies, will be briefly explained.

Principles of membrane separation

Separation methods that use pressure difference are outlined.

What is cross-flow filtration?

See here for the differences between dead-end filtration and cross-flow filtration.

Membrane function

Brief examples of membrane separation technology applications for each membrane type.