Chapter 17 - System Design for Wastewater Pumping

Abstract

Efficient designs for wastewater pumping stations requires careful planning and a formalized approach. Project events usually fall into three stages during the design process, including preliminary engineering, detailed layout, and detailed design. The purpose of preliminary engineering is to gather the information necessary to perform the design, to develop the basic concepts, and to obtain acceptance from all project participants. Even small pumping stations represent a substantial investment over the life of the facility, particularly true with wastewater pumping stations where structure size, excavation depths, and environmental considerations generally result in comparatively greater costs than those of water pumping stations of an equivalent capacity. The typical wastewater pumping station project requires the production of piping and instrument diagrams (P&IDs). Extreme caution should be exercised in the sump design, particularly as it relates to inlet conditions. The pump room layout should be developed with due consideration for other portions of the station. All spaces must work in harmony and must properly accommodate the function of all systems. Once detailed design is authorized, the production of final construction documents could begin. Once final performance requirements are known, the draft specifications describing the operating conditions, the performance requirements, and the required construction features (such as materials) should be produced for the major pieces of equipment.