Septic Tanks

Septic tanks are designed for the treatment of raw household sewage down to a purity level which permits the discharge of the treated wastewater directly into the ground by leaching. The sewage sediments are separated from the water, and fermented by anaerobic bacteria inside the septic tank. The sewage fouling is separated into solids which precipitate to the bottom, a fraction of light substances which form a floating skin on the surface, and a fraction of water-soluble substances. A special filter is used to improve the treatment.