Goseeko blog

What is Activated Sludge process?

by Team Goseeko

Activated Sludge process:

  • It is the sewage treatment process in which the production of an activated mass of micro-organism is done which stabilizes the waste aerobically.
  • It was developed in the year 1914 in England, by Aedern and Lockett.
  • Activated Sludge indicates that the one obtains sludge by setting the sewage in presence of abundant oxygen.


The properties of activated sludge are as follows:

  1. They have the fertilizing constituents.
  2. One can indicate the degree of aeration by the colour of the activated sludge.
  3. Light brown colour indicates under-aerated sludge.
  4. Golden brown colour indicates well aerated sludge.
  5. Muddy Brown coloue indicates over-aerated sludge.

Advantages of Activated Sludge Process:

The advantages are as follows:

  • Firstly, it has low installation cost.
  • Secondly, the quality of effluent is good.
  • In addition, it has compact design so the land requirement is less.
  • The loss of head is comparatively very small.
  • Lastly, the effluent does not have the strong odour.

Disadvantages of Activated Sludge Process:

The disadvantages are as follows:

  • Firstly, Changes in the quality of the sewage makes an adverse effect on the process of treatment.
  • The operation cost is high.
  • If the quantity of wet sludge increases it needs different method for disposal.
  • In case of some industrial waste, this treatment is sensitive.
  • Lastly, it requires Skilled Supervision.

Interested in learning about similar topics? Here are a few hand-picked blogs for you!

You may also like