Patent ID: 8381324

Claim:
Vacuum sewage system, which comprises a sanitary unit, such as a toilet unit, vacuum sewer piping connected to the sanitary unit, a discharge valve between the sanitary unit and the vacuum sewer piping, which discharge valve is arranged to be opened when the sanitary unit is used, a first pump for generating vacuum in the vacuum sewer piping, a second pump for pumping mainly sewage, and an on-line separator device in the vacuum sewer piping, wherein the on-line separator device separates air from sewage without collecting or storing sewage therein and has a vacuum level between a given high level and a predetermined low level, wherein the on-line separator device is connected in parallel between the first pump and the second pump such that the first pump is directly connected in parallel to the on-line separator device via a first conduit and the second pump is directly connected in parallel to the on-line separator device via a second conduit, wherein the first pump is arranged to evacuate air in order to generate a vacuum in the sewer piping and the second pump is arranged to pump mainly sewage from a sewage flow flowing into the on-line separator device with the vacuum level between the given high level and the predetermined low level and direct the sewage to a separate sewage collection area so that sewage is not collected or stored in the on-line separator.