period centered around 4 00 am with reference to fig1 and fig2 as the wastewater 20 flow in the upstream section 11 increases any flow in excess of a predetermined value will be limited by the flow control device 30 from reaching the downstream section 12 the wastewater 20 will then begin to backup into the upstream section of the sewer segment displacing the gaseous portion with stored wastewater thereby increasing the liquid portion 13 during this time the wastewater flow reaching the downstream section is limited to what can pass through the flow control device a number of flow control device 39 s could be used with this invention fig4 a and 4 b show the planar view of a number of possible flow control devices fig7 and 8 show two of the prior art devices in greater detail fig7 shows a moveable gate valve with a mechanical valve operator fig8 shows an inflatable membrane valve with a pneumatic valve operator either valve can be regulated manually or can be provided with a control system for automated flow regulation fig9 and 10 show a detailed view of an overflow weir and orifice flow control device for regulating wastewater flow with reference to fig9 and 10 use of the overflow weir and orifice flow control device is described further below although any number of flow control devices may be suitably used for flow control furthermore the flow control.