What are the 3 stages of sewage treatment?

There are three main stages of the wastewater treatment process, aptly known as primary, secondary and tertiary water treatment.

What are the 2 types of wastewater?

In simple terms, wastewater can be described in two broad terms: sewage wastewater and non-sewage wastewater.

What is an example of sewage?

Sewage is defined as waste matter and excrement carried away in drains. Waste matter that you flush down your toilet that gets carried away in the sewer is an example of sewage.

What is STP water?

Sewage Treatment Plant (STP)

Sewage is the wastewater coming from household, domestic and commercial outputs. They contain excreta of humans, animals, rainwater, debris from sewers in them. It contains more solid waste due to the presence of such material in it and is more harmful to human use.

What is primary sewage treatment?

Primary treatment removes material that will either float or readily settle out by gravity. It includes the physical processes of screening, comminution, grit removal, and sedimentation.

What are the three types of sewage?

There are three types of wastewater, or sewage: domestic sewage, industrial sewage, and storm sewage. Domestic sewage carries used water from houses and apartments; it is also called sanitary sewage.

What is called sewage?

Sewage, also called wastewater, is the contaminated water from homes, schools, and businesses. It comes from toilets, showers, clothes washers, dishwashers, etc.

What are the main sources of sewage?

Wastewater comes from ordinary living processes: bathing, toilet flushing, laundry, dishwashing, etc. It comes from residential and domestic sources. Commercial wastewater comes from non-domestic sources, such as beauty salon, taxidermy, furniture refinishing, musical instrument cleaning, or auto body repair shops.

What are the stages in sewage treatment?

Treatment Steps
  • Step 1: Screening and Pumping. …
  • Step 2: Grit Removal. …
  • Step 3: Primary Settling. …
  • Step 4: Aeration / Activated Sludge. …
  • Step 5: Secondary Settling. …
  • Step 6: Filtration. …
  • Step 7: Disinfection. …
  • Step 8: Oxygen Uptake.

What is the first stage of sewage treatment process?

primary sedimentation stage
The first stage in the sewage treatment is the primary sedimentation stage. Sewage including all of the grey and black water from a home flows into a chamber called the primary sedimentation tank and holds waste until it has had enough time for heavy sediment to disperse to the bottom.

What are the stages of treating wastewater?

The sewage treatment process
  • Taking the wastewater away. …
  • Screening the wastewater. …
  • Carrying out primary treatment. …
  • Secondary treatment. …
  • Carrying out final treatment. …
  • Generating power. …
  • Returning water to the river and solids to land.

What bacteria is used in sewage treatment?

The qualitative analysis of sewage and sludge samples showed the presence of 12 bacterial species belonging to 5 genera: Actinomyces, Bifidobacterium, Clostridium, Propionibacterium and Staphylococcus.

Why is sewage treated?

The overall aim of treating sewage is to produce an effluent that can be discharged to the environment while causing as little water pollution as possible, or to produce an effluent that can be reused in a useful manner. This is achieved by removing contaminants from the sewage. It is a form of waste management.

What is the secondary treatment of sewage?

Secondary treatment is the removal of biodegradable organic matter (in solution or suspension) from sewage or similar kinds of wastewater. The aim is to achieve a certain degree of effluent quality in a sewage treatment plant suitable for the intended disposal or reuse option.

What is the difference between sewage and sludge?

The distinction between sludge and sewage as nouns is that sludge is a generic term for solids that have been separated from suspension in a liquid, whereas sewage is a suspension of water and solid waste that is transported by sewers to be disposed of or processed.

What bacteria is used to clean water?

BioVolt uses strains of Geobacter and another microbe called Shewanella oneidensis to process the sludge. Its proprietary mix of organisms has one key advantage – the bacteria liberate some electrons as they respire, effectively turning the whole set-up into a battery.