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I. Introduction
Toray PVDF Hollow Fiber Membrane Module “HFU-2020HN” is the pressurized
hollow fiber UF (ultra filtration) membrane module developed with the polymer
science and the membrane fabrication technologies accumulated for a long time
in Toray Industries, Inc.
The membrane material is Polyvinylidene fluoride (PVDF). The nominal
molecular weight cut off of the membrane is 150,000 daltons. It has been
confirmed that more than 90% of 150,000 daltons model polymers is
consistently removed.
The module, with PVC and/or equivalent casing, is pressure-driven which
products much purified water than siphon-driven. The maximum operating
pressure is 600 kPa (87.0 PSI). The flow direction is outside to inside which is
suitable for high turbidity water treatment because the air-scrubbing can be
adopted to remove suspended solid effectively.
1. Characteristics of Toray "HFU series" Membrane Modules
(1) High Filtration Flux
HFU series provides high filtration flux and stable operation for the filtration
of various raw water sources. The membrane is made with a special
spinning method, which enables high permeability and high fouling
resistance.
(2) Excellent Water Quality
HFU series provides very good water quality for the filtrate, extremely low
turbidity since the membrane has 150,000 dalton nominal molecular weight
cut off. HFU series is recommended to be applied to the tertiary treatment
of sewage water and RO pretreatment in seawater desalination.
(3) High Mechanical Strength
The membrane of HFU series has very high mechanical strength because it
is made of PVDF with the special spinning method developed by Toray.
