Radial channel disc tube module

The so called RCDT module (Radial Channel Disc Tube module) is the most advanced product in DT module technology.

The module consists of a pressure tube and hydraulic discs which are held by a center tension rod. Octagonal membrane cushions lie between every two discs. Owing to this special construction, open flow channels are formed between the hydraulic discs and the membrane cushions where the raw solution concentrates. The individual channels are joined together by openings in the discs, which are arranged in annual pattern, so that the feed water flows radial across the membrane cushions, alternately from the inside towards the outside.

The permeat that has been seperated by the membrane, flows on the inside of the cushion into the spacer radial inwards to the central permeat sewer and is directed along the clamping pin to the connecting flange of the module. The seperation of concentrate and permeat happens between the hydraulic disc and the membrane cushion.



A major advance in Reverse Osmosis Technology

ROTREAT`s Disc-Module-Technology has created major advances in the field of REVERSE OSMOSIS and its use in the desalination and purification of landfill leachate and waste waters.


The patented RCDT-Membrane-Module is a modern design for desalination and purification of liquids. It operates effectively and economically also at increased turbidity and Silt Density Index levels for reverse osmosis.


The successful development of the RCDT modules was only made possible by a precise technical approach in developing the total RO system. ROTREAT possesses the rare capability of being both the module manufacturer and the systems manufacturer. This dual capability, plus direct contact with the end user, is of great advantage to the customer.


Why is the ROTREAT RCDT-Module-System the best choice in RO?

The patented fluid dynamics and construction of the disc membrane stack result in an open channel, unrestricted and fully turbulent feedwater flow system. This means that suspended solids carried in the feedwater can not be trapped or easily settle out inside the membrane module. Most important, it also means that the infrequent and highly successful maintenance cleaning of the membranes can be achieved using a standard inbuilt cleaning system.


ROTREAT is committed to the use of only the highest quality of components, materials and methods of design and construction to ensure for the end user 24 hours per day reliability and product water quality.