RO system and method for disinfecting lines of the RO system

A reverse osmosis (RO) system comprising an RO filter module which is subdivided by a membrane into a primary chamber and a secondary chamber, comprising a raw-water supply line leading to a ventilated supply tank, a line with an integrated pump leading from the ventilated supply tank to the primary chamber,

• a concentrate line leading away from the primary chamber, and a permeate supply line leading from the secondary chamber, with at least one dialysis device being connectable to the permeate supply line by way of a branch line or secondary ring line, and
• an adjacent permeate return line downstream of the at least one dialysis device leading back to the ventilated supply tank,
• wherein a circulation pump and an electrochemical ozone generator are integrated into the permeate return line,
• wherein a recirculation line connects the permeate return line downstream of the circulation pump and the ozone generator to the permeate supply line, with a recirculation valve integrated into the recirculation line and a return shutoff valve integrated into the permeate return line at a location downstream of the recirculation line, and
• wherein a permeate return-line section, terminating at one end in the permeate return line downstream of the valve arranged therein, and at an opposite end in the permeate supply line, the opposite end of the permeate return-line section branching off from the permeate supply line upstream of the termination of the recirculation line into the permeate supply line, and
• wherein a pressure holding valve is arranged in the permeate return-line section, so that the RO system can continue to operate even during a disinfecting mode and produces permeate without interruption and either an entire permeate volume or a proportion of the permeate flows back to the ventilated supply tank.