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MOLSEP®
Tubular type membrane module
Tubular type membrane modules are pipe-shaped separation membrane modules with relatively wide flow paths. Its shape characteristics make them ideal for solid-liquid separation of highly concentrated feed water. In addition, they are widely used in various fields including human waste treatment and wastewater treatment. The tubular type membrane modules of DAICEN MEMBRANE-SYSTEMS offer a product lineup of 3 types: UF membrane (ultrafiltration membrane), NF membrane (nanofilter membrane), and RO membrane (reverse osmosis membrane) spectrums.
Mechanism
Tubular type membrane modules pack 18 separation membranes. There are 2 types of modules: one is the “series type” in which 18 membranes are connected inside the module, and the other is the “parallel type” in which 18 membranes form independent flow paths.
Each separation membrane module has a three-layer structure consisting of a membrane, a cylindrical support tube, and a pressure-resistant tube. The separation membrane is applied to the inside of the cylindrical support tube with a diameter of 10 to 15 mm and a length of about 3 m. The membrane is covered with the pressure-resistant tube to increase its strength.
The filtration method is internal pressure filtration with cross flow filtration. Water or liquid permeates the membrane, passes through the cylindrical support tube, and flows out through the holes of the pressure-resistant tube. Compared with hollow fiber membrane modules and spiral type membrane modules, the feed water flow path is larger and therefore less likely to be blocked by direct filtration. The membrane module structure is suitable for concentration and separation.
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Separation membrane structure
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Image of cross-flow filtration
Features
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01
Membrane module with wide feed water flow paths (up to 14.5 mm) less likely to be blocked
Liquid with high turbidity, high COD, high viscosity, SS, and suspended solids can be directly filtered.
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02
Structure for preventing accumulation of concentrated liquid
It is effective for recovering valuable substances and in the food production industry.
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03
Adhesive-free
Reduces the risk of leachates affecting taste and aroma
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04
Exclusively manufactured by our company in Japan
DAICEN MEMBRANE-SYSTEMS is the only manufacturer of tubular type membrane modules in Japan.
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05
Product lineup covering the UF, NF, and RO spectrum
Features of UF membranes
- Separation membrane in the UF spectrum (ultrafiltration spectrum)
It can selectively treat the target substances according to their Molecular weight cut-offs. It can also secure a higher treatment flow rate than RO and NF membranes. - Extensive product lineup
A selection of 11 types, each with different molecular weight cut-offs module types, and membrane materials.
Features of NF and RO membranes
- Separation membranes of the NF and RO spectrum
These membranes can recover amino acids and low-molecular valuable substances such as heavy metals that pass through UF membranes, and are capable of desalination as well. - Uses hydrophilic cellulose acetate membranes (CA membranes)
Made with naturally derived materials and possessing high hydrophilicity, membrane contamination is unlikely to occur and a high treatment flow rate can be maintained. - Product lineup of 3 module types with different rejection rates and permeate flow rates
Selection can be made based on the intended use or application
- Separation membrane in the UF spectrum (ultrafiltration spectrum)
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06
Physical cleaning is possible with sponge balls
Special sponge balls flowing through the feed water paths physically wash away contamination adhering to the membrane surfaces. Periodic cleaning prevents the formation of gel and cake layers and maintains a high filtration rate.
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Applications
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Fruit juice concentration
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Oil-water separation
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Human waste treatment
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Latex concentration
Specifications
- Module specifications
- Product specifications
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Item MH25 type module P18A type module P18LP type module Product photo 
Module dimensions 114mm×2640mm 109mm×2619mm 114mm×3870mm Module type Series type Series type Parallel type Membrane area 2㎡ 1.6㎡ 2.3㎡ Tube inner diameter 14.5mm 11.5mm 11.5mm Number of tubes 18 18 18 -
- UF membrane
product specifications - NF/RO membrane
product specifications
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Product number Molecular Weight Cut Off Membrane material Module type Initial permeate water
flow rate＊
(L/hr/mo)Max.
working pressure
(MPa)Max.
operating temperature
(°C)pH range MH25-NV-DUYM010 20,000 PAN Series type 160 1 45 2～12 MH25-NV-DUYL010 40,000 PAN Series type 270 1 45 2～12 MH25-NV-DUS0410 40,000 PES Series type 400 1 50 1～13 TU-2020P18A 20,000 Polyolefin type Series type 80 1 40 3～11 TU-2020P18LP 20,000 Polyolefin type Parallel type 115 1 40 3～11 TU-20100P18A 100,000 Polyolefin type Series type 133 1 40 3～11 TU-20100P18LP 100,000 Polyolefin type Parallel type 191 1 40 3～11 TU-3020P18A 20,000 Polysulfone Series type 32 1 40 3～11 TU-3020P18LP 20,000 Polysulfone Parallel type 80 1 40 3～11 TU-30100P18A 100,000 Polysulfone Series type 79 1 40 3～11 TU-30100P18LP 100,000 Polysulfone Parallel type 200 1 40 3～11 - ＊MH25 type evaluation criteria: pure water, temperature 25°C, pressure 0.2MPa
- ＊TU type evaluation criteria: 0.5% polyethylene glycol solution (MW 20k), temperature 25°C, pressure 0.2MPa, flow rate 14L/min
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Product number Membrane material Module type Reference Performance Value Max. working pressure
(MPa)Max. operating temperature
(°C)pH range Monovalent ion rejectio Divalent ion rejection Initial pure water
permeate flow rate
(L/hr・mo
at2.5MPa)Initial actual feed
water permeate flow rate＊
(L/hr・mo
at2.5MPa)TR-90C1-P18A CA Series type ≧90% ≧95% ≧30 20～30 4 40 4～8 TR-80C2-P18A CA Series type ≧80% ≧93% ≧55 30～50 4 40 4～8 TR-70C3-P18A CA Series type ≧70% ≧93% ≧70 40～65 4 40 4～8 - ＊Initial actual liquid permeate flow rate: Reference value assuming various types of wastewater
- UF membrane
