Go With the Flow Gordon Varney and Lydia Gaunt explain how to select pumps in the water,wastewater and sewage industry

摘要

THE THREE main pump applications discussed in this article are water,wastewater and sludge.The differences between these fluids can lead to diverse pumping requirements and specific pump selection.Water and wastewater treatment typically run as continuous processes and where possible there is a preference to convey the main process stream through the works by gravity.This is particularly important when dealing with large volumetric flow rates,in order to minimise the use of pumping stations and the inherent energy and maintenance costs.However,due to specific site constraints,higher construction costs or topography,the requirement to raise water levels is sometimes unavoidable and pumping is therefore necessary.This article will discuss some of the considerations when selecting suitable pump types for transporting water,wastewater and sludge.It is not definitive and is by no means a complete review of handling water and sludge by pumping,but provides some useful information and a good basis of key considerations.