Vacuum sewage system

An improved method of transporting air and sewage through a vacuum sewage system comprising:

• laying a vacuum conduit in a sawtooth fashion having a bore and having at least one riser, low point, and downslope so that when no flow is occurring the low point contains sewage and the downslope and riser are air filled with the conduit not being sealed and air flow being allowed above the sewage in the low point to permit full vacuum to be distributed throughout the pipe;
• providing a valve at one end of the conduit and opening the valve to admit sewage from a source of sewage into the conduit, the sewage forming a hollow cylindrical mass which sweeps through the conduit from the valve end thereof towards the collection means;
• and
• holding the valve open a predetermined time after the sewage has been admitted to permit a quantity of air to enter.

An improved vacuum sewage system for transporting an intermittently injected sewage mass comprising:

• at least one gravity-fed sewage pipe;
• a collection tank fed by the gravity-fed sewage pipe for holding sewage, said sewage exposed to atmospheric pressure;
• an intermittently operated sewage injection valve having an inlet and an outlet, said inlet coupled to the collection tank;
• a source of vacuum pressure;
• a vacuum collection tank having an inlet and having vacuum pressure applied thereto from the source of vacuum pressure;
• a conduit section coupled between the sewage injection valve outlet and the collection tank for transporting sewage in the form of a hollow cylinder, said conduit means being laid out in a sawtooth fashion, having at least one riser, low point, and downslope so that when no injected sewage mass is being transported therein the low point collects sewage and permits vacuum pressure to be communicated throughout the conduit section.