Sludge bulking

In this article we discussed :-

What is sludge bulking

Why is is formed

Effects of sludge bulking

How to avoid sludge bulking

Answers

Sludge having poor settling characteristic is term as bulking of sludge

It is formed due to the growth of filamentous microorganism in the system

these microorganism are found due to low nutrient content, High sludge age and low f/ m ratio (<.3/d )

Sludge bulking result in excessive loss of MLSS from the system there by reduces its efficiency

in order to avoid sludge bulking either secondary sedimentation tank is chlorinated or nutrient content is increased in the system

such that BOD5 :N:P = 100 : 5 : 1