Sludge stabilisation at small works

Authored by: Bhola R. Gurjar , Vinay Kumar Tyagi

Sludge Management

Print publication date:  March  2017
Online publication date:  March  2017

Print ISBN: 9781138029545
eBook ISBN: 9781315375137
Adobe ISBN:


 Download Chapter



The main processes used to stabilise the sludge at small water treatment plants are tabulated in Table 9.1. Table 9.1 Effective sludge stabilisation processes.

S. No.


Process Description


Sludge Pasteurization

Minimum mean retention (MMR) of 30min at 70°C or 4h at 55°C followed by mesophilic anaerobic digestion.


Mesophilic anaerobic digestion

Minimum mean retention (MMR) of 12 d at temperature of 35 ± 3°C followed by MMR of 14 d secondary storage.


Thermophilic aerobic digestion

Minimum mean retention of 7 d with a minimum of 4h at 55°Cor higher.



Minimum mean retention (MMR) of 40°C for 5 d including 4 h at minimum of 55°C followed by minimum of 2 months maturation.


Lime stabilisation

pH not less than 12 for minimum of 2 h.


Lime conditioning dewatering and storage

Minimum storage period of 3 months


Dewatering storage

Minimum storage period of 6 months


Liquid storage

Minimum storage period of 3 months

Search for more...
Back to top

Use of cookies on this website

We are using cookies to provide statistics that help us give you the best experience of our site. You can find out more in our Privacy Policy. By continuing to use the site you are agreeing to our use of cookies.