What is activated sludge in microbiology?

Activated Sludge. ∎ Activated sludge is a type of secondary. treatment whose primary role is to. remove most of the dissolved solids remaining in the waste stream after primary treatment.

What is activated sludge used for?

The activated sludge process is a means of treating both municipal and industrial wastewater. The activated sludge process is a multi-chamber reactor unit that uses highly concentrated microorganisms to degrade organics and remove nutrients from wastewater, producing quality effluent.

What types of microorganisms are in the activated sludge?

Activated sludge (AS) is composed of aerobic and anaerobic microorganisms such as bacteria, archaea, fungi, and protists. It is capable of degrading organic compounds, including petroleum products, toluene, and benzopyrene (Seviour and Nielsen, 2010).

What is microbiology of wastewater treatment?

A wastewater treatment plant is a microbiological zoo that houses bacteria, protozoa, metazoa and other microlife. The microorganisms do the actual breakdown and removal of nutrients and organic material in the wastewater. Like you and I, they perform best when all their needs are met (food, pleasant environment etc.).

What is the role of microorganisms in wastewater treatment?

Microorganisms are the workhorses of wastewater treatment systems and anaerobic digesters, where they are responsible for removal of pollutants and pathogens, recovery of nutrients and energy, and producing clean water.

Which microorganisms are used in industrial waste treatment?

Protozoa. They are unicellular eukaryotic organisms bigger than bacteria. Protozoa prey on pathogenic bacteria and play a significant task in wastewater treatment process. They remove free-swimming bacteria and other suspended particles by digesting them and which make it to have an advantage in wastewater.

How is activated sludge used to clean sewage?

The activated sludge process in the treatment of wastewater involves blowing oxygen or air into raw, unsettled sewage. This process smashes the solids. The sewage is bubbled, and sewage liquor is discharged into an activated sludge chamber.

What is the role of bacteria in wastewater treatment?

Anaerobic bacteria are used in wastewater treatment on a normal basis. The main role of these bacteria in sewage treatment is to reduce the volume of sludge and produce methane gas from it.

Which bacteria is used in ETP?

In treated effluent, there may be faecal bacteria of the genera Bifidobacterium and Bacteroides (Wery et al.