Technical Assessment of Low-Pressure Pipe Wastewater Injection Systems

摘要

The 'Low Pressure Pipe Wastewater Injection System', or LPP system, combines several innovative subsurface wastewater absorption system concepts into a unique onsite design package. Most important among the features of LPP systems are very shallow placement, very narrow trenches, pressure-dosed distribution, loading on a system area basis, and rather flexible site criteria. The system was developed in North Carolina in response to intense growth and development in unsewered areas with soils unsuitable for conventional systems. Since about 1977 approximately 1600 LPP systems have been installed in North Carolina, and continued rapid proliferation is anticipated.