Septic System Health

Jump to:

Septic Secrets

There are 2 secrets to septic health and minimizing lake pollution: Bacteria & Time

Home Waste Percentages

How Septic Tanks Work

Your septic system is actually a small, on-site sewage treatment and disposal system buried in the ground. The system comprises two parts: The septic tank and the soil absorption area.

The modern septic tank is a watertight box divided into two compartments and usually made of pre-cast concrete, concrete blocks or plastic. When household waste drains into the box, several things take place.

  • Organic solid material floats to the surface and forms a layer called the "crust". Bacteria in the septic tank biologically convert this material to liquid.

  • Inorganic or inert solid materials and the by-products of the bacterial digestion sink to the bottom of the tank and form a layer called "sludge".

  • Only fairly clear water should exist between the crust and sludge layers. This clear water -and only this clear water should overflow into the second compartment and then out to the soil absorption area.

Bacteria

Working septic tank bacteria must be present in the septic tank to digest the organic solids. Normal household waste provides enough bacteria to keep the digestive process working properly. A faulty system is the result of solid material overflowing into the second compartment. It is the solids overflow that clogs soil pores and causes septic systems to fail.

Two main factors cause solid material to build up to the point of overflow:

  • Bacterial Deficiency

  • Lack of Pumping

Septic System Soil Absorption

Area septic field beds generally consist of a network of perforated pipes running through layers of sand and crushed stone. They may be constructed above or below ground. If solids are allowed to clog the pipe perforations or the sand, drainage will begin to slow and eventually stop.