Disc-Tube Reverse Osmosis (DTRO) is a form of reverse osmosis technology where the disc-tube membrane modules feature a special open channel design. The feed fluid enters the DTRO membrane column through the inlet, flows through the channel between the guide discs and the column housing to the other end, where at the flange, the leachate can enter the guide discs through passages. The treated leachate rapidly flows through the filter membrane over the shortest distance, makes a 180° turn to the next membrane surface. The center of the guide disc is slotted, allowing the feed fluid to flow to another guide disc. Thus, a double "S" shaped trajectory from the circumference to the center and from the center to the circumference is formed on the membrane surface. The concentrate that did not pass through the membranes exits from the feed end.

The surface of the guide discs is designed with protrusions arranged in a specific pattern. This special hydraulic design creates turbulent flow as the fluid under pressure hits the protrusions while flowing along the membrane surface. This increases the fluid permeation rate through the membrane and the module's self-cleaning capability, effectively preventing membrane fouling and concentration polarization, extending the system's service life. During cleaning, deposits on the membranes can be easily flushed away, ensuring the system can adapt to more severe inlet conditions with high turbidity and sand content.

Two concentric reverse osmosis membrane rings form one membrane sheet. A filamentous support layer between the two membrane layers allows the clean water that has passed through the membranes to flow quickly to the clean water tube. These three annular materials are ultrasonically welded at the outer ring, with the inner ring open as the permeate outlet. The leachate flows in the middle of the membrane sheet along the filamentous support layer to the clean water channel around the central pull rod. The process fluid is sealed by O-rings on the guide discs to prevent entry into the clean water channel. The distance from the membrane sheet to the central clean water channel is short and equal for all membrane sheets in the module.