WHO & WHAT WE ARE TO YOU
What is I & I -Inflow and Infiltration?
Groundwater and stormwater that enters a sewer system is known as inflow and infiltration. Collection systems can be damaged when they are forced to transport more flow than they are designed to handle. Increased effluent also raises operating costs for wastewater treatment facilities, because benign stormwater and groundwater mixes with sewage. In many cases,
inflow and infiltration (I&I) accounts for up to 45% of the annual flow to treatment plants.
- Inflow is immediate, as soon as it starts to rain there will be some Inflow thru manhole frame and covers
- Infiltration is a delayed reaction of rain entering sewer thru defects in the asset,generally broken pipes,worn gaskets and manhole cracks
Exceeding the capacity of the collection system can result in discharge of untreated wastewater into the environment either from the collection system components or through a treatment that doesn’t have the capacity to treat the water. Infiltration can also cause pipe structure failures due to erosion of soil support, and ground subsidence due to erosion of underground soil.