HOME About Microza Field of Use Application FAQ Contact Product Lists Membrane Separation Technology Primer
Potable Water
Wastewater / Sewage
Chemical Industry
Power Plants
Automotive / Industrial
Pharmaceutical and Food (2)

Water Applications (Q4)
Wastewater & Sewage Applications (Q2)
Pharmaceutical, Fermentation, Food and General Industry Applications (Q4)
Q1 : Are the modules approved by appropriate regulatory authorities ?
Are the module materials verified for safety ?
  Membrane modules applied in water applications are approved by Japan's Association of Membrane Technology by complying with the AMST standards.
Q2 : What is the status for equipment approval by the Japan Water Research Center (JWRC) ?
  Many suppliers of municipal water installations, including Asahi Kasei, have received approvals from JWRC for deploying these modules in water plants.
Q3 : Do membrane modules conform to JWRC standardization specifications?
  The UNA-620AS Microfiltration module meets JWRC standardization specifications.
Q4 : Which technology is preferred in municipal water applications - Microfiltration (MF) or Ultrafiltration (UF) ?
  There is no significant difference in UF or MF permeate (filtrate) quality and in Cryptosporidium removal efficiency. Hence, it is recommended to make the selection on the basis of cost and taking capacity (water flux rate) into account.
Q1 : What are the main differences between Plate & Frame type Membrane Bio Reactors (MBRs) and Hollow Fiber Membrane (HF) MBRs?
  Plate & Frame MBRs facilitate removal for cleaning when fouled from extended use in activated sludge filtration.
A promising advantage of HF MBRs, when compared with Plate & Frame MBRs, is the HF's inherent higher membrane packaging density which facilitates a reduction in membrane aeration tank size.
Q2 : Are hollow fiber type membranes fragile?
  The hollow fibers employed in the Microza MBRs are designed to have enhanced physical strength compared with more general purpose hollow fibers.
Specific Hollow Fibers (HF) Features for Microza® MBR
Large diameter fiber comparable in shape and diameter with 'spaghetti', and with a significantly thicker wall structure than conventional HF.
Highly crystalline PVDF HF polymer has demonstrated greater mechanical strength and chemical resistance compared with ordinary PVDF HF.
The HF membrane wall is comprised of a homogeneous three-dimensional network structure which eliminates the peeling of the skin layer often experienced with laminated membranes.
Q1 : Who should be contact to purchase membrane modules?
  For the Pencil type and Lab modules for experimental use, please contact the following sales agents:
Sales Agent Phone Number
Funakoshi Co. Ltd. Tokyo: +81-3-5684-1616
Advantec Toyo Co. Ltd. Tokyo: +81-3-5981-0617

For commercial modules for in-plant use, please contact Asahi Kasei sales staff directly
Q2 : How should effective filtration testing be performed?
  Please refer to the instruction manuals supplied with the Pencil type and Lab modules.
Q3 : How to select module size to meet requirements?
  Please use the below table as reference or guide.
Module Size Filtrate Volume Purpose
Pencil type ~100 to 200 ml Separation feasibility check
Lab module ~10 to 20 liters Obtain basic engineering and sizing data
Commercial size > hundred liters -
Q4 : How to proceed when feasibility testing is required?
  Our staff consultants will provide targeted technical and economic recommendations after the questionnaire has been completed and submitted.