When the septic tank no longer has room to store these captured particles, the particles begin to escape from the tank with the exiting wastewater and will begin to clog the soil absorption area.
The filter will help protect the absorption area, but it will increase the volume of solids captured and stored in the septic tank.
Thus it is important that every septic tank be pumped periodically to remove these captured, partially decomposed organic particles.
The average adult eats about a quart of food each day.
The body extracts a very small portion of this food and uses it to sustain the body. This means each adult discharges about 90 gallons of solid waste into the septic tank each year.
Finally the anaerobically treated wastewater leaves the septic tank and is piped to additional treatment units or distributed to the soil absorption area.
Retaining the heavy (settleable) and lighter (floatable) solids slowly fills the septic tank with solids from the bottom up and top down.
Septic tanks receive the raw wastewater from the home and are designed to facilitate the removal of particles heavier than water by encouraging these heavy particles to settle to the tank floor.
This is why septic tanks fill up with solids, but how often should septic tanks be pumped to keep them operating properly?
As the tank volume filled with sludge and scum increases, wastewater is retained in the tank for less time and the solids removal process becomes less effective.
If too much sludge accumulates, large amounts of the wastewater’s solids will flow to the soil absorption field causing system failure (especially from older tanks that do not have exit filters.
Until recently, septic tanks were most often single chamber tanks.