Time dosing is used to control pump “off” and “on” times so wastewater is sent to the next downstream component evenly throughout the day, When activated during high-flow events, a peak enable sensor shortens the rest period between doses to allow the system liquid level to gradually return to normal levels.  Flow equalization is a management concept that can help reduce stress on system performance due to high variation in flows. In flow equalization, the peak flows are stored for a period of time to be delivered to the next downstream component over a longer period of time.  By sizing downstream components based on equalized flow and not peak flow, system cost and reliability can both be improved.

Learning Objectives:

1. State the objective of time dosing 

2. Compare the function of demand dosing to time dosing 

3. Name at least two facility types where incorporating flow equalization could substantially improve system performance 

4. Discuss whether these two ways of controlling flows can be used in the same system or not

Speaker:  Kevin Sherman, Director of Engineering and Regulatory Affairs at SeptiTech Inc.