Traditionally in Spain, Septic tanks were nothing more than a brick built chamber in a hole in the ground. The bricks were laid such that the water could seep out into the ground and soak away.
These days new builds need to have a proper septic tank fitted. In this project we fitted a three stage biological septic tank with a Fat separation tank. The fat separator channels all the detergents and fats from washing machines, kitchen and hand basins so that they do get into the septic tank and destroy the biological action. Set up correctly the need to empty a biological tank is far less than normal as the solids almost completely breakdown over time. The tanks are fitted with a concrete coronation that allows foot and car traffic over the top.