1mW Sewerage Design to MSIG 001
Population Equivalent for Sewerage System
Population equivalent (PE) denotes the amount of population to be served by a sewerage network, where each of them is assumed contributing 225 litres of sewage per day.
PE for a development is determined based on the premise type, which are categorized in design guideline.
The catchment of a stretch of sewer pipe is determined based on the connectivity. Total PE for the pipe is the sum of PE for buildings within the catchment.
Knowing the total PE catered by the pipe, we calculate peak flow factor. Then, we multiply it with the flow rate associated with the PE, and obtain peak flow through the pipe.
The capacity of pipe is then evaluated using this value.
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