ABSTRACT
Before the stabilization of sludge it is unstable, in the sense that the sludge solids contain a large fraction of organic or volatile solids and fixed mineral solids are less in quantity. This high organic or volatile fraction of sludge makes it easily decomposable, putrescible or unstable. Hence, unless we stabilize the sludge, it is full of nuisance value or a potential case for putrefaction. Thus, sludges are stabilized to:
reduce pathogens,
eliminate offensive odours, and
inhibit, reduce, or eliminate its potential for putrefaction.
