Aeration is the process in which wastewater is exposed to circulating air. This adds oxygen to the wastewater and allows gases trapped in it to escape. This method is used in the water treatment plant.

This is a process in which dirt and other floating particles get stuck together to form scum which floats over the water surface. This method is used in wastewater treatment to remove the suspended light impurities.

Give reason for the following; Human excreta should be disposed of properly. Enable Ginger Cannot connect to Ginger Check your internet connection or reload the browser Disable in this text field Rephrase Rephrase current sentence Edit in Ginger ×

Untreated human excreta is a health hazard. It may cause water pollution and soil pollution. Both the surface water and groundwater, which is a source of water for wells, tubewells, springs and many rivers get polluted. Thus, it becomes the most common route for waterborne diseases such as cholera, dysentery, and typhoid.

This is a process in which dirt and other floating particles get stuck together to form scum which floats over the water surface. This method is used in wastewater treatment to remove the suspended light impurities.