DEFINING TREATMENT PUNT CAPACITY

摘要

The rated capacity of a sewage treatment plant has traditionally been simplified to the Average Dry Weather Flow (ADWF). However, the limitation of this tradition is that ADWF is not a process-limiting factor for the design or operation of any significant unit processes. The mass loads of pollutants (eg, COD, BOD, TSS, TKN, and TP) and/or the Peak Wet Weather Flow (PWWF) are the governing factors for the sizing and operational performance of all treatment processes.The benefit of adopting Equivalent Population (EP) to define capacity is that it incorporates these components of hydraulic and mass loads into a single number. It is recommended that wastewater practitioners take up the challenge and adopt EP, rather than ADWF, for defining both the pollutant loads and plant capacity, and that the rated load and capacity should be based on the design and operational limiting parameter in each case.