MF Membrane FILPLATE for Water Treatment

Membrane Technologies
Proprietary technology for sustained
high performance

has high porosity and a uniform
distribution of consistent pore size. This feature
reduces the load on ﬁne pores in the membrane
during water treatment, ensuring stable separation.

features proprietary hydrophilicity technology.
Hydrophilic treatment is required to develop the performanceof water treatment membrane. With conventional technology,
however, the hydrophilizing agent tends to shed, and theresultant decrease in hydrophilicity allows sludge to adhere andaccumulate, thus reducing the water treatment performance.
uses a special durable hydrophilic treatment
technology (patented) to increase the persistence of membrane
performance.

Membrane surface structure

Conventional
methodFlow rateadjusting tanks

Aeration tanks

Distribution of pore size/A.U.

Conventional waste water treatment required large aeration and sedimentation tanks. Furthermore,
the supernatant in the sedimentation tank—which is susceptible to suspended substances—is sent
to the treated water tank. These problems are solved with, MF membrane for water
treatment developed by Toyobo* based on its wide variety of membrane separation technologies.
provides clean treated water and helps to reduce the size of facilities.
provides sustained ﬁltration performance and stable operation, plus high maintainability.

Advanced membrane forming
technology

Membraneseparation tank

Distribution ofpore size

Conventional productHydrophilizing
agent

Pore size/μm

SludgeTreatedwater tank

MBR

SupernatantHydrophilic
layer

Sedimentation
tank
Treatedwater tankElement

Membraneunit* Toyobo's membrane technologies include seawater desalination (RO) membranes, dialysis
membranes, virus removal membranes, and ultraﬁltration (UF) membranes for drinking water,
with high market share for seawater desalination in the Middle East and other regions.

Element structure that contributes
to operating stability

Image of membrane separation in
activated sludge

Elements are designed to reduce the unevenness ofinternal ﬂow, enabling stable operation for extendedperiods. (Use of simulation technology)

The membrane element separates treated water from
activated sludge, while the upward ﬂow and bubbles during
aeration pull away the sludge that tends to attach to themembrane.

Image ofelement

Cross-sectional image of element
TreatedwaterFlow dispersion plate

A stable hydrophilic layer formed
with the aid of a hydrophilizinga g e n t ﬁ xe d t o t h e m e m b ra n e
reduces the adherence of sludge
onto the membrane.

Features & Beneﬁts
Membrane that facilitates removalof adhering sludge

As ﬁltration is continued over extended periods, sludge
adhered to the membrane surface and reduced treatmentperformance.
With, sludge adhering to the surface tends
to come oﬀ easily. This feature minimizes membrane
performance degradation due to fouling and allows forstable membrane ﬁltration over extended periods.

Sludge remaining after physical cleaning,
on a membrane used for a year

(Used for general sewage treatment, including physical cleaning with sponge)

Unevenﬂow
Beforeconsideration

Fast ﬂow

Afterconsideration

Slow ﬂow

Bubblees aof bubbl nd activatedslud
FlowgeMaterials forﬂow dispersion

Even
ﬂow

Activated sludge

Membrane pore
Filtration membrane

The hydrophilizing agent comesout with the water ﬂow, whichfacilitates sludge adherence andthus reduces ﬁltration performance.

Conventional membrane

Reduced maintenance workload
Membrane performance compared inToyoboʼs laboratory test using A4-size elements(MLSS in 10000 mg/L・glucose source water・water temperature 30℃)

Days to reach 30 kPa of trans-membrane pressure
RUNCondition

Flux

0.6 m/D(continuous) 0.8 m/D (intermittent)

Aerationﬂow rate 2 L/min/element 4 L/min/element 6 L/min/element
23 days

12 days

24 daysConventional product A

9 days4 days4 daysConventional product B

8 days3 days2 daysCompared with conventional products, the trans-membranepressure due to sludge accumulation increases more slowly,
which leads to reduced maintenance work such as membranecleaning.
(Note: The results vary depending on various conditions and factors.)