Activated Sludge Process
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Activated Sludge Process (ASP)
The activated sludge process is a process for treating sewage and industrial wastewaters using air and a biological floc composed of bacteria and protozoa.
This Process Involves :
- Aeration taking in the presence of microbes
- Solid liquid separation followed by aeration
- Discharge of clarified effluent
- Wasting of excess biomass
- Return of remaining biomass to the aeration tank
In aeration sludge process waste water containing organic matter is aerated in an aeration tank which micro organisms degrade the soluble organic matter.
Advantages & Disadvantages Of ASP
Advantages :
- Biological nitrification without adding chemicals.
- Oxidation and nitration achieved.
- Biological phosphorous removal.
- Solids and liquids separation.
- Removes organics.
- Cost effective.
- Easily maintained mechanical work.
- Self sustaining system.
Disadvantages :
- Cleaning is a hassle.
- Most plants need at least three tanks.
- Temperature changes affect the tank greatly.
- Large area and huge civil works required.
Flow Diagram Of ASP
