DTRO Disc Tube Reverse Osmosis Membrane For Sewage Treatment,
Leachate From Garbage, DT Disc Guide Plate Assembly Membra
DT membrane technology, also known as Disc Tube Module technology,
is divided into two categories: DTRO (Disc Tube Reverse Osmosis)
and DTNF (Disc Tube Nanofiltration). It is a patented membrane
separation module. This technology is specifically developed for
the filtration and separation of high concentration feed solutions
and has been successfully applied for nearly 30 years.
1. Structure of DTRO disc tube reverse osmosis membrane module
The disc tube membrane module is mainly composed of RO membrane,
guide plate, center pull rod, shell, various sealing components and
connecting bolts at both ends of the flange. Stacking the filter
membrane and guide plate together, fixing them with a central rod
and end cap flange, and then placing them into a pressure resistant
shell, forms a disc tube membrane component.
2. Working principle of DTRO disc tube reverse osmosis membrane
After passing through the gap between the membrane stack and the
shell, the liquid enters the bottom guide plate through the guide
channel (as shown in Figure 2). The processed liquid flows rapidly
through the filter membrane at a short distance, then reverses 180
degrees to the other membrane surface, and then flows into the next
filter membrane, forming a tangential flow filtration from the
circumference of the guide plate to the center of the circle, then
to the circumference, and finally to the center of the circle on
the membrane surface. The concentrated liquid flows out from the
inlet flange. As the liquid flows through the filter membrane, the
permeate is continuously discharged through the central collection
tube. The concentrated liquid and permeate are isolated by an
O-ring seal installed on the guide plate.
3. Characteristics of DTRO disc tube reverse osmosis membrane
technology:
• Avoid physical blockages
The DT component adopts an open flow channel design, with a wide
effective flow channel for the material and liquid, avoiding
physical blockage.
• Low degree scaling and pollution phenomena
By using a guide disc with convex support points, the material
liquid forms a turbulent state during the filtration process,
greatly reducing the occurrence of membrane surface scaling,
pollution, and concentration polarization phenomena. This allows
highly polluted water sources with SDI values up to 20 to remain
uncontaminated.
• Long membrane service life
The DT membrane module effectively reduces membrane fouling,
reduces membrane fouling, and has a long cleaning cycle. At the
same time, the special structure and hydraulic design of DT make
the membrane assembly easy to clean, and the flux recovery after
cleaning is very good, thereby extending the membrane life.
Practical engineering has shown that even in the direct treatment
of leachate, the lifespan of DT membrane can be as long as 3 years
or more, which is not achievable for general membrane treatment
systems.
• Components are easy to maintain
The DT membrane module adopts standardized design and is easy to
disassemble and maintain. Opening the DT module allows for easy
inspection and maintenance of any filter membrane and other
components. Maintenance is simple, and when the number of
components is insufficient, the module allows for fewer membranes
and guide plates to be installed without affecting the use of the
DT membrane module. All maintenance work can be completed on site.
Application fields of DTRO disc tube reverse osmosis membrane:
● High difficulty industrial wastewater treatment
● Treatment of leachate and leachate concentrate from garbage
Reverse osmosis concentrated water re concentration and reduction
treatment
● Preparation of drinking water supply by desalination of seawater
in the entire sea area
● Mobile drinking water supply for military camps and field
operations
Emergency drinking water supply for natural disasters, water source
pollution, etc
Application of process separation, purification, and concentration
in the biopharmaceutical industry
DT (Disk Tube) membrane column utilizes the principle of reverse
osmosis to separate, purify, and desalinate molecules in liquids.
It can remove various organic or inorganic impurities, including
heavy metals, ammonia, various organic and inorganic substances,
and other harmful substances. DT membrane columns have high
performance and low operating costs. Compared with traditional roll
type reverse osmosis membrane mechanisms, DT membrane columns have
higher recovery rates, open fluid channels, and are less prone to
clogging and scaling.
When installed in a reverse osmosis system, the DT membrane column
can operate under high SDI inlet water. The quality of the produced
water is good and can be directly reused on the production site.
The DTRO disc tube reverse osmosis membrane does not require
frequent replacement and has a service life of over 5 years.
The DT system DTRO disc tube reverse osmosis membrane is widely
used in the harmless treatment of garbage leachate, seawater
desalination systems, and the reuse and harmless treatment of other
highly polluting industrial wastewater.
The DTRO disc tube reverse osmosis membrane is a treatment system
for industrial wastewater, characterized by:
Can accept highly difficult to degrade wastewater, such as
CODCr1000-20000mg/L and salt content 1000-20000mg/L
High recovery rate: 75% -90%
High performance and low cost: Operating cost per ton of water is
less than 2 yuan
The inlet SDI can reach up to 6.5, and there is no possibility of
pollution blockage in the system. The conductivity of the produced
water can be as low as 100 μ s/cm
● Easy maintenance and upkeep
● Long membrane lifespan: 5-10 years
The DT membrane column DTRO disc tube reverse osmosis membrane is
widely used in the treatment of leachate from garbage, zero
discharge of industrial wastewater, and seawater desalination
treatment in ships, warships, and other equipment. It has been
successfully applied for more than 30 years, and the technology is
very mature and reliable, with thousands of engineering cases
worldwide. During the application process, PALL has accumulated
rich engineering experience, continuously improved some defects of
DT membrane columns, and perfected the design of optimized system
devices, which has led to remarkable performance of PALL's DT
membrane columns worldwide and is recognized as a leader in this
field.
Common models include:
DTRO disc tube reverse osmosis membrane column at 75 bar
DTRO disc tube reverse osmosis membrane column 90bar
DTRO disc tube reverse osmosis membrane column 120bar
