Maapuhdistamoilla tarkoitetaan jätevesijärjestelmiä, joissa jätevedet puhdistetaan maaperässä.

Soil treatment/­septic tank

An efficient and simple solution for large sites

Infiltration fields are simple and natural ways of handling domestic wastewater wherever it is created. All that is required is space for a purification field and a professional design to implement it. Infiltration plants are wastewater treatment systems in which wastewater is purified in the soil. Infiltration package include a septic tank and a purification field. The purification field can be an infiltration plant or sand filter plant, depending on the type of soil on the site.

Infiltration is an excellent solution when

  • an efficient and simple solution is required for treating the domestic wastewater created by a single family
  • the plot is large and is not located near a body of water or in a groundwater area

Infiltration solutions are divided into two groups according to wastewater type. Infiltration plants intended for grey water can only process domestic wastewater from showers, washing up and personal washing. Infiltration plant intended for all types of water can accept all domestic wastewater – grey water and sewage.

Solutions for grey water

Domestic wastewater from showers, washing up and personal washing is purified by the soil using a sand filter or infiltration system. The 1 m³ infiltratioin package is intended for cleaning the grey water produced by one family. The infiltration plant can complement a sand filter using a 2 x 15 m collection pipe pack.

If space is limited, an infiltration module solution can be selected instead of a traditional field. Such a solution only requires around 10 m².  Infiltration modules made from mesh pipes replace the infiltration field's distribution layer while purifying wastewater more effectively than a traditional layer of macadam.

When the purification field is higher than the septic tank or if the height difference is not sufficient for gravity sewerage, an Uponor pump chamber can be added to the system if required. The pump chamber is located after the septic tank. Grey water septic tanks generally need to be emptied once every two years at holiday homes and once every year at permanent residences.

Solutions for all types of water

A single-family leaching field for all wastewater consists of a 2 m³ septic tank, a divider drain and an absorption or filtration field. Larger septic tanks and fields can be used to build Infiltration systems for two or three families.

On small plots, the purification field can be built using absorption modules, which require less space. Infiltration modules made from mesh pipes replace the infiltration field's distribution layer while purifying wastewater more effectively than a traditional layer of macadam.

Additional phosphor removal can be obtained using a separate phosphor removal chamber, which is installed between the septic tank and the leaching field. The septic tank is ordinarily emptied twice annually.