AquaZoom - Model ST -Reverse Osmosis Membrane Modules

1. The module uses a tie rod through the permeate tube to assist in holding the element in place within the housing vessel at high operating pressure
2. The open and thick ladder-type feed spacer is designed to operate with highly contaminated feed streams.

CrossTek is the only company in the world with the original Rochem Spacer Tube Module® providing the performance that you desire. This module design allows for smaller, less expensive systems for landfill leachate treatment with less RO pre-treatment. We have many references in which our ST modules are used. If you are ready to move to the most advanced RO membrane module technology for demanding applications, please contact us to discuss how we can help you.

Like traditional spiral wound modules, the feed flows over the membrane parallel to the individual membrane leaves from which the spiral is constructed. Hence, ST modules are operated in series, up to 6 in a single pass. Multiple parallel passes will provide greater permeate flow in a single stage. Separate passes of membranes in a second stage will allow for additional concentration or permeate treatment as desired.

• The ST module has more surface area than a comparably sized DT module
• The ST+ module has 29.3 m2 (315 ft2) while the DTG module has 9.8 m2 (105 ft2).
• The more compact ST module will provide for smaller, less expensive membrane systems providing more value to the end user.
• The larger surface area allows the ST module to be used in larger flow applications.
• The ST module has significantly less inlet-to-outlet pressure drop as compared to the DT module
• The ST+ module operating pressure drop is about 17 psi (1.2 bar) while the DTG operating pressure drop is up to 87 psi (6 bar).
• Lower pressure drop results in lower operating costs for the operator.
• Lower axial pressure drop allows for more flexibility in system design.  
• The proprietary feed spacer allows the ST module to operate in very demanding applications.
• The operator gets the advantages of a spiral wound membrane module that can operate in many applications previously reserved for higher cost, open channel module designs.