Small
Scale
Sewage
Treatment
Cesspools -In many homes, human waste is dumped into cesspools. A cesspools is an underground construction, consisting of concrete cylindrical rings with pores in the walls of ring. Water passes out the bottom and through the pores into the surrounding sand, whereas the solid waste accumulates at the bottom.
Anaerobic bacteria in the compacted sludge layer at the bottom of cesspool digest the organic matter. The breakdown products diffuse into the ground. After few years it may become necessary
to pump out the sludge layer (if it becomes thicker) and to clean with strong acid.
