Tubular membranes are particularly suited to liquid with high viscosity or suspended solids, because their wide flow paths make them highly resistant to clogging. Tubular membranes system is an external and separated filtration system. For high solid content and viscosity liquid, we use adjustable cross-flow velocity to make the membrane run under optimal conditions and extend membrane service life. At the same time, it has more convenient cleaning, maintenance, and operation under closed pipeline.
SUN® Tubular membranes use a cross-flow filtration technology. The cross-flow filtration can reduce cleaning times and downtime, so as to maintain a high flow rate. Some membranes are available for back washing, if necessary, you can also use permeate or chemical cleaner for back washing, effectively extend the membranes working life.
Decoding of SUN® Tubular Membranes Model
What Membrane Sheet We Have?
Hydrophilic membrane sheet specifications:
| Parameter |
Unit |
Membrane Material |
| PVDF |
PAN |
PES |
| Pore size/MWCO |
nm/Dalton |
100,000 |
30nm |
50,000 |
0.1μm |
100,000 |
50,000 |
10,000 |
5,000 |
| Clean Water Flux |
LMH,
100kpa |
>800 |
>800 |
>150 |
>600 |
>350 |
>200 |
>25 |
>15 |
|
| Operation Pressure |
Kpa |
-20~800 |
-20~800 |
|
| Max.Operation Temperature |
ºC |
60 |
60 |
|
| pH Range |
|
2~12 |
2~12 |
| Chloringe Exposure |
ppm.h |
250,000 |
250,000 |
|
Note: Membrane inner tube diameter is 5-12.7mm; Superior fouling resistance; Higher sustainable flux; Easier cleaning;
Strong negative pressure resistance.
Maximum operating pressure up to 10bar, Working life up to more than 5 years.
SUN® Tubular Membranes / an external MBR for Landfill Leachate
The external tubular membrane system is a kind of process mainly for high concentration wastewater treatment,
especially for landfill leachate. It is composed of biochemical process and external tubular UF membrane system.
Pollutants such as organic matter will be removed through biochemical process and the sludge and water will be
separated through the external tubular UF membranes, so as to get high quality ultrafiltration water, and the
concentrated water will return to the biochemical tank. The designed flux is up to 70~120LMH, and the filtration
accuracy can reach 0.03um. The 8mm diameter channel can effectively retain the sludge without causing membrane
fouling. The maximum sludge concentration can up to 40mg/l.
The combination of the tubular UF membrane system with RO or NF can make the landfill leachate effluent
meet China government level 1 & level 2 discharge standards.
| Membrane Module: TG-30nm-8830, Operation Parameters (an example) |
| Working principle |
cross filtration |
Flux per module |
1.9t/h |
| Operation pressure |
5 bar/5 modules |
Chemical cleaning frequency |
1-2 month |
| Flux rate |
70 LMH |
Pressure drop. |
0.8 bar |
| Reference of selection tubular membranes in the field of landfill leachate |
| Daily Capacity Q (m³/d) |
Q≤50 |
50≤Q≤120 |
120≤Q≤250 |
250≤Q≤400 |
300≤Q≤450 |
| Module size |
4inch diameter,
3 meter length |
6inch diameter,
3 meter length |
8inch diameter,
3 or 4 meter length |
10inch diameter,
3 meter length |
10inch diameter,
4 meter length |
| Module qty. |
3-6 pcs |
3-6 pcs |
4-6 pcs |
4-6 pcs |
4-6 pcs |
SUN® On Site Application Pictures
Difficult waste water fields:
Landfill leachate pretreatment
Pretreatment for alkali liquor recycle
Special chemical waste water (Coking, Tannery, textile, wood pulp bleach) treatment
Return injection of produced water from oil field
Emulsified oil treatment
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