Waste Water Engineering
In the activated sludge process

Water is removed by centrifugal action
Aeration is done with an admixture of previously aerated sludge
Aeration is continued till stability
Sludge is activated by constant stirring

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
In septic tanks,

The baffles or tees are extended up to top level of scum
Free board of 0.3 m may be provided
All listed here
The clear space between the baffle top and covering slab is about 7.5 cm

ANSWER DOWNLOAD EXAMIANS APP