ASP Aeration Methods and Processes

This article discusses the different methods and processes used for aeration in ASP (activated sludge process).

The three main methods are diffused air aeration, mechanical aeration, and combined diffused air and mechanical aeration.

The different patterns of mechanical aeration are also discussed, as well as the important aeration processes in ASP.

Finally, the advantages of stabilization ponds or lagoons are outlined.

Questions

• What are the methods employed for the purpose of aeration in ASP?
• What are the patterns of mechanical aeration?
• List out the important aeration processes in the ASP?
• What are the advantages of stabilization ponds or lagoons?

Answers

• The methods employed for the purpose of aeration in ASP are diffused air aeration, mechanical aeration, and combined diffused air and mechanical aeration.
• The patterns of mechanical aeration are Haworth paddle or Sheffield aeration system, Hartley paddle or Bir Mangham Bioflocculation system, Simplex aeration system, Link belt aeration system, and Kessner Brush aeration system.
• The important aeration processes in the ASP are conventional process, tapered aeration process, step aeration process, contact stabilization process, completely mixed process, modified aeration, and extended aeration.
• The advantages of stabilization ponds or lagoons are lower initial cost than required for a mechanical plant, lower operation costs, and regulation of efficient discharge possible thereby providing control of pollution during critical times of the year.