Lenntech Water treatment & purification Lenntech Water treatment & purification

Trisep RO Membrane Elements

X-20 TM thin film composite membrane

X-20 TM is a proven low flow membrane, which features the unique poliamide-ures chemistry possessing a uniform composition throughout the membrane. The surface charge of the X-20 membrane minimizes fouling of organic elements and maximizes silica rejection, resulting in dramatically lower operating costs.

Advance chemistry
The Trisep X-20 TM is provided with amino surface functional group, neutral surface charge, fully aromatic polyamide-urea backbone, and a surface chemistry integral to polymer.


  • Decreased regeneration costs (up to 500%)
  • Decreased cleaning costs (up to 600%)
  • Increased membrane life (up to 3 times)
  • Decreased system downtime (up to 3 times)
  • Lower system maintenance costs (up to 3 times)
  • Increased flux rates (up to 20%)
  • Stable flux performance
  • Superior rejection of pesticides
  • Better cleaning results

Trisep X-20 TM offers a silica reduction up to 99.8%, a continuous chloramines tolerance up to 5 ppm, a high scaling and biological fouling resistance and stable performance over a broader pH range.

Field experience
Trisep has over 7 years of proven field experience with over 10.000 units sold worldwide.
Trisep membranes were successfully applied at:

  • Shell Oil Corp.
  • Lone Star power
  • Jones Station
  • Sony Corp.
  • Copesul (Brazil)
  • Envig (South Africa)
  • Nevada CoGen Association
  • Esmil (Europe)
  • WaterSolve
  • Duke power, Alan Station
  • Allied Signal
  • National Semiconductor
  • Purac, ND
  • Madras Refineries Ltd.

In all these application it proved an high biofouling reduction, an increase in silica rejection, slowing the membrane degeneration and increasing their life-time. This allowed to highly reduce operating costs.

Cost-Benefit analysis
A competitive comparison based on actual field experience in various applications shows that using X-20 membranes in an RO systems of 100 GPM with 2.000 TDS and 10 ppm of silica decreases the annual operating costs by 33%.
A cost-benefit analysis carried out for Hyundai Corp. in Korea shows that:

  • X-20 decreases cleaning time by over 7 times
  • X-20 saves annual cleaning chemical costs by 3.7 times
  • X-20 allows 66% savings on element replacement costs

NOTE: this analysis used data deriving from field RO experiences with MRL Madras Refinery India, Aramco Riyadh Refinery Saudi Arabia, Hyperion West Basin USA, and various other applications

For more information or quotation, please contact us: Feedback Form or call us on +31 152 610 900

Lenntech can also help you with similar brackish or seawater filters or filtration systems for optimum water purification.

For RO design questions and engineering calculations and manuals or handbooks please contact us at info@lenntech.com. Lenntech also supplies the reverse osmosis membranes from Knappe Composites, Dow Filmtec, Koch, Toray, Phoenix, Ropur, Codeline, GE-Osmonics & Hydranautics. Lenntech the water purification manufacturer

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