Supratec PERMOX OM120 User Manual
GESELLSCHAFT F Ü R U M W E LTUND V E R FA H R E N S T E C H N I K M B H
Supratec
AERATION TECHNOLOGY
®
P E R M O X O M 1 2 0
O v a l M e m b r a n e Tu b e D i f f u s e r
w i t h s t a i n l e s s s t e e l b o d y
for fine bubble or coarse bubble diffusion of liquids
von-Drais-Straße 7
D-55469 Simmern / Hunsrück
tel.: +49 6761 / 9 65 09-00
fax: +49 6761 / 9 65 09-01
e-mail: info@oxyflex.de
internet: www.oxyflex.de
Supratec
Gesellschaft für Umweltund Verfahrenstechnik mbH
von-Drais-Straße 7 • D-55469 Simmern • tel.: +49 6761 / 9 65 09-00 • fax: +49 6761 / 9 65 09-01 • info@oxyflex.de
Supratec
Gesellschaft für Umweltund Verfahrenstechnik mbH
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PERMOX OM120
Oval membrane tube diffuser
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The PERMOX OM120 oval membrane tube diffuser is an improvement of old PERMOX OM
with new width of 120 mm, instead of former width of only 90 mm.
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PERMOX OM120 oval membrane tube diffuser consists of a solid, strong stainless steel body
(AISI 316).
This special design of the oval membrane tube diffuser results in a flat membrane area, active
only to the top, similar to most efficient plate diffusers. Even for different specific air loads, the
entire flat active membrane surface works always evenly. A higher efficiency and significantly
longer operation time is resulting by this special shape compared to normal tube diffusers The .
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oval membrane tube diffuser OM provides the advantages similar to a modern PERMOX 120
plate diffuser with regard to limited pressure increase and increase efficiency.
The diffuser membrane is secured to the body by two stainless steel 1-ear clips. The high-quality
membranes are available in EPDM (ethylene propylene diene rubber).
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The PERMOX OM120 is available in two sizes:
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- PERMOX OM120 - 1.5 with an active flat membrane surface of 0.18 m²
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- PERMOX OM120 - 2.0 with an active flat membrane surface of 0.24 m²
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The PERMOX OM120 oval membrane tube diffuser is a fine bubble aeration element for
efficient aeration, which is mainly used for the oxygen supply of biological waste water treatment
plants.
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The PERMOX OM120 oval membrane tube diffuser is characterized by the following superior
features:
Ø higher efficiency compared to standard tube diffusers
Ø high operational reliability by limited pressure increase
Ø significantly extended operation time, also due to stainless-steel-body
Ø special diffuser design, optimized for liftable grids (no buoyancy)
Ø available in different lengths
Ø insusceptible to fouling
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The membranes are perforated individually. The PERMOX OM120 oval membrane tube diffuser
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is able to cover a very broad operating range of up to 20 m /h per meter.
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The PERMOX OM120 oval membrane tube diffuser can be operated in intermittent mode.
As an alternative to fine-bubble aeration diffuser, the membrane can also be manufactured for a
coarse-bubble version.
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The oval membrane tube diffuser type PERMOX OM has been used successfully in Germany
and worldwide in communal and industrial waste water treatment plants for many years. It is also
suitable for aerating liquids of all kinds were stainless steel bodies are suitable. We will be
pleased to send you our current list of references on request.
(as of date August 2018)
Supratec
Gesellschaft für Umweltund Verfahrenstechnik mbH
von-Drais-Straße 7 • D-55469 Simmern • tel.: +49 6761 / 9 65 09-00 • fax: +49 6761 / 9 65 09-01 • info@oxyflex.de
®
With the fine-bubble design of PERMOX OM120 oval membrane tube diffuser, specific oxygen
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transfer rates in pure water of more than 25 g O /(m x m ) can be achieved with an extensive
2 N ET
layout and correct water depth.
The following diagram shows the example of a result of an oxygen transfer test. The values were
measured in a rectangular tank with a water depth of 4.0 m, a diffuser blow-in depth of
3.8 m and coverage of 20%.
The values cannot be transferred to other plants. The results that are shown here depend on
several influencing factors, such as the tank shape, blow-in depth, coverage or a separate
recirculation due to additional mixers.
Supratec will be pleased to prepare a technical data sheet for each individual application for you
on request.
AIR-PULSING: mixing without a mixer
The option of the intermittent operating mode means that in a combined tank with alternating
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nitrification and denitrification phases and for a sufficient coverage by PERMOX OM120 oval
membrane tube diffusers, the use of a mixer will not be necessary ("Air-Pulsing" process).
Any sedimentation of the activated sludge during the denitrification phase is prevented by shortterm aeration intervals. The required aeration intervals are individually adapted to the respective
plant with regard to its specific conditions such as the sludge index of the waste water. The
aeration time is limited to some minutes and the process is repeated approximately every 10 to
20 minutes depending on the plant type.
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The diagram cannot be used in order to derive warranty claims of any kind.
specific standard oxygen transfer SSOTR
[gO / ( x m )]
2 ET
m
3
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pressure loss of diffuser
[hPa]
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specific airload of PERMOX OM120 oval-membrane-tube-diffuser
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[m /h per m diffuser length]
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specific standard oxygen transfer SSOTR and pressure loss of
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PERMOX OM120 oval-membrane-tube-diffuser
pressure loss
specific standard
oxygen transfer SSOTR
(as of date August 2018)
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