Describe the steps involved in getting clarified water from wastewater.
Wastewater treatment involves the following steps like:
Screening: Wastewater is passed through bar screens to remove large objects like rags, sticks, cans, etc.
Grit Removal: After screening, it goes to a grit and sand removal tank. Here, the speed of the incoming wastewater is decreased to allow sand, grit and pebbles to settle down.
Primary Sedimentation: Done using a sedimentation tank which is sloped towards the middle. Solids like faeces settle at the bottom of sedimentation tank is called sludge and is removed using a scraper.This sludge is transferred to separate tank where it is decomposed by the anaerobic bacteria. This produces biogas.
Aeration: Air is pumped into the clarified water to help aerobic bacteria to grow. The bacteria thus produced consume human waste, food waste, soaps and other unwanted matter remaining in clarified water.
Secondary Sedimentation: Sludge containing air settles at its bottom of aeration tank as activated sludge.
Chlorination: To disinfect water, it is treated with the chemicals like chlorine and ozone before releasing it into the distribution system
Wastewater treatment involves the following steps like:
Screening: Wastewater is passed through bar screens to remove large objects like rags, sticks, cans, etc.
Grit Removal: After screening, it goes to a grit and sand removal tank. Here, the speed of the incoming wastewater is decreased to allow sand, grit and pebbles to settle down.
Primary Sedimentation: Done using a sedimentation tank which is sloped towards the middle. Solids like faeces settle at the bottom of sedimentation tank is called sludge and is removed using a scraper.This sludge is transferred to separate tank where it is decomposed by the anaerobic bacteria. This produces biogas.
Aeration: Air is pumped into the clarified water to help aerobic bacteria to grow. The bacteria thus produced consume human waste, food waste, soaps and other unwanted matter remaining in clarified water.
Secondary Sedimentation: Sludge containing air settles at its bottom of aeration tank as activated sludge.
Chlorination: To disinfect water, it is treated with the chemicals like chlorine and ozone before releasing it into the distribution system
