Sewage Treatment Ensuring the Cleanliness of Water

Sewage Treatment and its Importance

Sewage treatment is an essential process that removes harmful contaminants from wastewater, making it safe for the environment and human use.

The process involves several stages of filtration, chemical treatment, and disinfection to remove solids, organic matter, and pathogens.

How Clean is Water after Sewage Treatment?

The cleanliness of water after sewage treatment depends on the efficiency of the treatment process and the level of contamination in the wastewater.

Treated wastewater undergoes rigorous testing to ensure it meets regulatory standards for discharge into water bodies or reuse for purposes such as irrigation or industrial processes.

Parameters for Water Quality Assessment

  • Biological Oxygen Demand (BOD): Measures the amount of organic matter present that consumes oxygen during decomposition.
  • Chemical Oxygen Demand (COD): Measures the total amount of organic and inorganic matter that can be oxidized by chemical means.
  • Total Suspended Solids (TSS): Measures the amount of suspended particles in the water.
  • Pathogens: Includes bacteria, viruses, and parasites that can cause waterborne diseases.

Effectiveness of Sewage Treatment

Modern sewage treatment plants are highly effective in removing contaminants from wastewater, typically achieving the following reductions:

  • BOD: 95-99%
  • COD: 80-90%
  • TSS: 95-99%
  • Pathogens: 99.9%

Importance of Proper Sewage Treatment

Proper sewage treatment is crucial for protecting human health, the environment, and water resources:

  • Removes pathogens, preventing waterborne diseases.
  • Reduces pollution of water bodies, safeguarding aquatic ecosystems.
  • Provides reclaimed water for non-potable uses, conserving freshwater resources.