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General Information Concerning Pressure Sewer Systems
Published in David Thrasher, DESIGN and USE of PRESSURE SEWER SYSTEMS, 2020
The two major types of pressure sewer systems are the grinder pump system and the septic tank effluent pumping (STEP) system. These different types of systems are depicted in Figures 3-1 and 3-2. From these figures it is obvious that the major differences between these systems are in the on-site equipment, but some differences may also exist in the pressure mains and appurtenances, mainly due to the solids and grease that must be transported in a grinder pump system. As one can see after examining Figures 3-1 and 3-2, the grinder pump pressure sewer system is based upon the premise that the grinder pump macerates and pumps all liquids and solids, including grease. The STEP system, on the other hand, retains much of the solids and grease within the individual septic or interceptor tanks. It is also significant that neither type of pressure sewer system requires any modification of the plumbing within individual households. This allows use of pressure sewer systems without changing the general routine and habits of the users.
State of art review on Life Cycle Assessment of polymers
Published in International Journal of Sustainable Engineering, 2020
Vahidi et al. (2016) done comparative LCA for six types of wastewater pipe materials. Two sewer systems were compared. Gravity sewer system & Pressure sewer system. Both systems were compared with six types of materials. Among six pipe materials, ductile iron had higher impact and reinforced concrete had lesser impact and can be a good alternative pipe. HDPE and PVC had lesser impact than FRP. PVC had lesser impact in all impact categories. From LCA results, Gravity sewer system was better than the Pressure sewer system.