hiekkasuodatinkenttä

Hiekkasuodatinkenttä, often translated as sand filter field or sand infiltration field, is a wastewater treatment system used primarily in rural or low-density areas. It is a biological treatment process that relies on a bed of sand to remove contaminants from pre-treated wastewater, typically from septic tanks. The wastewater is distributed evenly over the surface of the sand bed, where it slowly percolates downwards.

As the wastewater filters through the sand, a biofilm of microorganisms develops on the sand grains. This biofilm plays a crucial role in breaking down organic matter and pathogens present in the wastewater. The sand itself acts as a physical filter, trapping suspended solids. The treated effluent that reaches the bottom of the sand bed is then collected by a network of perforated pipes and can be discharged into the surrounding soil or a nearby water body, provided it meets local environmental standards.

Hiekkasuodatinkenttä systems are relatively simple to construct and operate, making them a cost-effective solution for wastewater management. They are particularly effective in areas where the soil has good drainage capabilities. Regular maintenance, such as periodic removal of accumulated solids from the inlet and ensuring even distribution of wastewater, is necessary for optimal performance and longevity. These systems are a common and environmentally sound method for decentralized wastewater treatment.