Sewage pumping
Encyclopedia
Sewage pumping is normally done by a submersible pump
.
This became popular in the early 1960s, when a guide-rail system was developed to lift the submersible pump out of the pump station for repair, and ended the dirty and sometimes dangerous task of sending people into the sewage or wet pit. Growth of the submersible pump for sewage pumping since has been dramatic, as an increasing number of specifiers and developers learned of their advantages.
Three classes of submersible pumps exist:
Submersible pumps are normally used in a packaged pump station where drainage by gravity is not possible.
Vertical type sewage pumps have also been used for many years. They have the motor above the floor so work on the motor can be done without entering the sewage pit.
Submersible pump
A submersible pump is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped. The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between...
.
This became popular in the early 1960s, when a guide-rail system was developed to lift the submersible pump out of the pump station for repair, and ended the dirty and sometimes dangerous task of sending people into the sewage or wet pit. Growth of the submersible pump for sewage pumping since has been dramatic, as an increasing number of specifiers and developers learned of their advantages.
Three classes of submersible pumps exist:
- Smaller submersible pumps, used in domestic and light commercial applications, normally handle up to 55mm spherical solids and range from 0.75kW to 2.2kW.
- Larger submersible pumps, handle 65mm and larger solids and normally have a minimum of 80mm discharge. They are generally used in municipal and industrial applications for pumping sewage and all types of industrial wastewater.
- Submersible chopper pumpsChopper pumpsA chopper pump is a centrifugal pump, which is equipped with a cutting system to facilitate chopping/maceration of solids that are present in the pumped liquid. The main advantage of this type of pump is that it prevents clogging of the pump itself and of the adjacent piping, as all the solids and...
, which are used to handle larger concentrations of solids and/or tougher solids that conventional sewage pumps cannot handle. Chopper pumps are generally used in municipal and industrial wastewater applications and provide clog-free operation by maceratingMaceration (sewage)Maceration, in sewage treatment, the use of a machine that reduces solids to small pieces in order to deal with rags and other solid waste. Also, macerating toilets, which use a grinding or blending mechanism to reduce human waste to a slurry, which can then be moved by pumping...
those solids that might clog other types of submersible pumps.
Submersible pumps are normally used in a packaged pump station where drainage by gravity is not possible.
Vertical type sewage pumps have also been used for many years. They have the motor above the floor so work on the motor can be done without entering the sewage pit.
See also
- Sewage treatmentSewage treatmentSewage treatment, or domestic wastewater treatment, is the process of removing contaminants from wastewater and household sewage, both runoff and domestic. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants...
- Pumping stationPumping stationPumping stations are facilities including pumps and equipment for pumping fluids from one place to another. They are used for a variety of infrastructure systems, such as the supply of water to canals, the drainage of low-lying land, and the removal of sewage to processing sites.A pumping station...
- Packaged pump station
- Submersible pumpSubmersible pumpA submersible pump is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped. The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between...
- Chopper pumpsChopper pumpsA chopper pump is a centrifugal pump, which is equipped with a cutting system to facilitate chopping/maceration of solids that are present in the pumped liquid. The main advantage of this type of pump is that it prevents clogging of the pump itself and of the adjacent piping, as all the solids and...
Literature
- D. Weismann, T. Gutzeit: Kommunale Abwasserpumpwerke. 2nd edition, VULKAN-Verlag, Germany 2006, ISBN 978-3-8027-2843-3
- D. Weismann, M. Lohse: Sulfid-Praxishandbuch der Abwassertechnik; Geruch, Gefahr, Korrosion verhindern und Kosten beherrschen! 1st edition, VULKAN-Verlag, Germany 2007, ISBN 978-3-8027-2845-7