VACUUM SEWERAGE SYSTEM WITH INCREASED LIFT CAPABILITIES HAVING ELECTRIC AIR ADMISSION CONTROLLERS

摘要

An improved vacuum sewerage system for transmitting sewage through an intermittently opened sewage control valve (40) of a transport conduit (20) by differential pressure. The vacuum conduit (20) is laid out in a saw-toothed fashion, having a riser, a low point, and a downslope. When no sewage is being transported through the conduit (20), any residual sewage in the conduit collects in the low point, with minimal intermittent closure of the conduit (20) over time to permit minimal drop in vacuum or subatmospheric pressure throughout the conduit (20) such that there is more than adequate vacuum or subatmospheric pressure available to operate the control valve (40). When the control valve (40) is opened, the sewage transported through the vacuum conduit (20) forms a generally hollow cylindrical mass, which is propelled toward a vacuum collection tank (12).