A vacuum station is used for storing sewage from a vacuum sewage pipe and
then delivering the sewage to a sewage treatment plant or the like. The
vacuum station includes a collection tank for collecting sewage, a
plurality of vacuum pumps for depressurizing and pressurizing an interior
of the collection tank, and a controller for controlling the plurality of
vacuum pumps. The controller controls at least one of the vacuum pumps so
as to rotate in normal direction so that the interior of the collection
tank is depressurized to collect sewage into the collection tank, and at
least one of the vacuum pumps so as to rotate in reverse direction when
the sewage in the collection tank reaches a predetermined sewage level so
that the interior of the collection tank is pressurized to discharge the
sewage from the collection tank.