Sewage is wastewater that is discharged from residences, hospitals, industries, offices, and other locations. Rainwater that runs down the streets during a storm is also included. Many dangerous compounds are present in the water that runs off the roadways and rooftops. Sewage is a type of waste that is liquid in nature. Impurities are dissolved and suspended in the wastewater.
Sewage treatment process
Sewage contains a huge amount of organic matter which is toxic. Microorganisms are widely used in sewage treatment plants for removing this toxic organic matter. A sewage or wastewater treatment plant consists of two stages.
Primary Treatment
It involves the removal of large or small-sized components in the wastewater through physical processes.
Biological Treatment:
Aerobic microorganisms are inoculated into the sewage treatment plant. These microbes utilise the organic components of the sewage and reduce toxicity. This can be measured by BOD (Biological oxygen demand).
Why it is harmful to discharge untreated sewage into rivers or seas?
Untreated sewage should not be discharged into the sea because sewage consists of pollutants and harmful microorganisms which will contaminate water causing disease in people using contaminated water.
Sewage is wastewater that is discharged from residences, hospitals, industries, offices, and other locations. Rainwater that runs down the streets during a storm is also included. Many dangerous compounds are present in the water that runs off the roadways and rooftops. Sewage is a type of waste that is liquid in nature. Impurities are dissolved and suspended in the wastewater.
Sewage treatment process
Sewage contains a huge amount of organic matter which is toxic. Microorganisms are widely used in sewage treatment plants for removing this toxic organic matter. A sewage or wastewater treatment plant consists of two stages.
Primary Treatment
It involves the removal of large or small-sized components in the wastewater through physical processes.
Biological Treatment:
Aerobic microorganisms are inoculated into the sewage treatment plant. These microbes utilise the organic components of the sewage and reduce toxicity. This can be measured by BOD (Biological oxygen demand).
Why it is harmful to discharge untreated sewage into rivers or seas?
Untreated sewage should not be discharged into the sea because sewage consists of pollutants and harmful microorganisms which will contaminate water causing disease in people using contaminated water.
