Taken
From Webster's New World Dictionary
Septic
Tank
an underground tank for receiving waste matter to be
putrefied and decomposed through bacterial action.
The
septic tank is the first step of the wastewater treatment
process.
The septic tank is the first stop for all wastewater
coming from the drains and toilets in your home. bacteria,
which are naturally present in all septic systems, begin
to digest the solids that settle to the bottom of the
tank, transforming up to 50 percent of these solids
into liquids and gases. When liquids within the tank
rise to the level of the outflow pipe, they enter the
drainage system. The effluent then travels through a
series of pipes into the drain field where it is further
clarified.
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