Design of septic tank and soakpit
asked 17 February 2019 asked by Anjana (340 points)
The drained vertical sand filter is designed for soils with too low permeability. The washed sand is used as a purification medium. Wastewater is treated by infiltration into the filter.
To fully answer the question, a design study must be carried out.
The dimensioning of the installations must be adapted to the pollution flows to be treated and allow the treatment of all waste water (waste water, grey water).
In France, the installation is prohibited by regulation within 35 m of a declared water catchment area intended for the human consumption (wells, drilling).
In other words, the parameters necessary for the design study cannot be processed on the forum. The analysis must be done in the field.