What is Sewage Water Treatment?

Sewage water treatment is the process of removing contaminants from wastewater before it's released into the environment.
It helps protect public health, aquatic ecosystems, and prevents pollution of rivers, lakes, and oceans.
The process involves physical, biological, and chemical steps to clean the sewage effectively and safely.
Treated water can be reused for irrigation, industrial use, or safely discharged into natural water bodies.
Sewage treatment reduces harmful pathogens, organic waste, toxic substances, and excess nutrients in wastewater.

Stages of Sewage Water Treatment

1. Preliminary Treatment

• Removes large solids like rags, sticks, plastics, and grit from incoming sewage water.

• Screens and grit chambers are used to separate materials that can clog or damage downstream equipment.

• Prevents damage to pumps and other mechanical parts in the treatment plant.

• This step also protects biological and chemical processes that follow in later treatment stages.

• Efficient screening helps reduce treatment costs and extend equipment life.

2. Primary Treatment

• Allows solids to settle at the bottom of a sedimentation tank for removal.

• Lighter materials like oils and grease float and are skimmed off the surface.

• Removes about 60% of suspended solids and some organic waste from sewage.

• This step does not remove dissolved pollutants, only physical particles.

• Essential to reduce the load on secondary treatment processes that follow.

3. Secondary Treatment

• Uses biological processes to break down organic matter with bacteria and microorganisms.

• Activated sludge systems or trickling filters are commonly used in this stage.

• Removes dissolved and suspended organic materials effectively and efficiently.

• This is the most critical stage for reducing waterborne disease risks.

• It can remove up to 90% of organic pollutants from wastewater.

4. Tertiary Treatment

• Advanced treatment that removes remaining nutrients, chemicals, and pathogens.

• Includes filtration, disinfection, and sometimes membrane processes or chemical treatment.

• Chlorine, UV light, or ozone is used to disinfect and kill harmful microorganisms.

• Makes the water safe for discharge or reuse in irrigation and industrial purposes.

• Final polishing step to meet environmental discharge standards and regulations.

Do’s of Sewage Water Treatment

• Do monitor and maintain treatment systems regularly for efficient operation.

• Do train staff properly to manage equipment and handle waste safely.

• Do follow environmental regulations and wastewater discharge standards strictly.

• Do recycle treated water wherever possible to reduce water consumption.

• Do test the water quality regularly to ensure compliance and safety.

Don’ts of Sewage Water Treatment

• Don’t discharge untreated sewage into natural water bodies—it causes serious pollution.

• Don’t ignore small leaks, blockages, or foul odors in the treatment system.

• Don’t overload the treatment plant with industrial waste beyond design capacity.

• Don’t use untrained personnel to handle hazardous chemicals or biological waste.

• Don’t dispose of harmful chemicals like oils or medicines in drains or toilets.

Why is Sewage Water Treatment Important?

• Prevents the spread of diseases caused by bacteria, viruses, and parasites in sewage.

• Reduces environmental pollution and protects aquatic life and ecosystems.

• Conserves freshwater by enabling safe reuse of treated water.

• Supports sustainable development and responsible urban growth.

• Helps meet legal, environmental, and public health standards for communities.

Contact us: info@svsaqua.com

Phone no: +91 8087005141