Process water supply unit for supplying a medical treatment unit, dental medical treatment unit and operating method

A process water supply unit for supplying a medical treatment unit with process water (BW), containing biocide, comprising:

• a pressurized water container for storing process water;
• a container receptacle for receiving the pressurized water container;
• and
• a cylindrical lid part accommodating the container receptacle;
• the container receptacle comprising:
• a compressed-air inlet for connecting the process water supply unit to a compressed-air source;
• a compressed-air connection for introducing compressed air originating from the compressed-air inlet into the pressurized water container;
• a process water connection for dispensing the process water (BW) out from the pressurized water container by the compressed air (DL) to the medical treatment unit;
• a sterile air filter which is integrated into a compressed-air path between the compressed-air inlet and the compressed-air connection;
• and
• a plate-shaped base plate, through which the process water connection and the compressed-air connection run, wherein the plate-shaped base plate is arranged in the lid part, wherein the plate-shaped base plate is arranged completely inside the cylindrical lid part.