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Sewage Water Treatment Plant

Sewage Water Treatment Plant

Product Details:

  • Application Industrial
  • Membrane Size Standard
  • Product Type Sewage Treatment Plants
  • Power Source Electric
  • Operation Type Automatic
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Sewage Water Treatment Plant Price And Quantity

  • 1 Unit

Sewage Water Treatment Plant Product Specifications

  • Sewage Treatment Plants
  • Automatic
  • Industrial
  • Electric
  • Standard

Sewage Water Treatment Plant Trade Information

  • 30 Days

Product Description

A sewage water treatment plant, also known as a wastewater treatment plant (WWTP) or sewage treatment plant (STP), is a facility designed to treat and purify wastewater from domestic, industrial, and commercial sources. The primary goal of these plants is to remove contaminants from the sewage, making the water safe for discharge into the environment or for reuse.

Stages of Sewage Treatment

1. Preliminary Treatment

This stage involves the removal of large debris and grit that can damage or clog equipment. Key processes include:

  • Screening: Removing large objects like rags, sticks, and plastics.
  • Grit Removal: Settling out sand, gravel, and other heavy particles.

2. Primary Treatment

This stage focuses on removing suspended solids from the sewage. Key processes include:

  • Sedimentation: Allowing solids to settle out by gravity in primary clarifiers, forming sludge.
  • Skimming: Removing floating materials like oil and grease.

3. Secondary Treatment

This stage involves biological processes to degrade dissolved organic matter. Key methods include:

  • Activated Sludge Process: Using aeration tanks to mix sewage with a biological floc composed of bacteria and protozoa.
  • Trickling Filters: Spraying sewage over a bed of stones or other media where microbes degrade the organic matter.
  • Lagoons: Large, shallow ponds where sewage is naturally treated through microbial activity and sunlight.

4. Tertiary Treatment

This advanced treatment stage further purifies the water. Methods can include:

  • Filtration: Removing residual suspended solids.
  • Nutrient Removal: Eliminating nitrogen and phosphorus to prevent eutrophication.
  • Disinfection: Killing pathogens using chlorine, ultraviolet (UV) light, or ozone.

5. Sludge Treatment and Disposal

The sludge collected during primary and secondary treatment undergoes further processing to reduce its volume and potential health hazards:

  • Thickening: Concentrating the sludge to reduce its volume.
  • Digestion: Breaking down organic matter in the sludge anaerobically or aerobically.
  • Dewatering: Removing excess water to produce a semi-solid material.
  • Disposal or Reuse: Options include incineration, landfill, or use as fertilizer after further treatment.

6. Reuse and Discharge

  • Effluent Reuse: Treated water can be reused for irrigation, industrial processes, or as potable water after advanced purification.
  • Discharge: Treated effluent is released into rivers, lakes, or oceans, adhering to environmental regulations to protect water quality.
  • Environmental and Health Considerations
  • Pollution Control: Effective sewage treatment prevents water pollution and protects aquatic ecosystems.
  • Public Health: Proper treatment eliminates pathogens and reduces the risk of waterborne diseases.

7. Innovations in Sewage Treatment

  • Membrane Bioreactors (MBRs): Combining biological treatment with membrane filtration for high-quality effluent.
  • Constructed Wetlands: Using natural processes involving wetland vegetation, soil, and microbial activity.
  • Energy Recovery: Capturing biogas from sludge digestion for use as a renewable energy source.


Sewage water treatment plants play a crucial role in maintaining environmental health and public safety. By systematically treating wastewater through various stages, these facilities ensure that the water released back into the environment is clean and safe, contributing to sustainable water management practices.
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