Traditional treatment plant


conplast Household sewage treatment plant CONPLAST with traditional stone leach bed.

Wherever there are favourable soil conditions and lack of sewerage system, the most preferred solution is to build a household sewage treatment plant with leach drainage.

CONPLAST sewage treatment plant

The shown treatment plant:

  • is easy to transport
  • is easy to install
  • requires minimal maintenance
  • has very low running costs

The treatment plant has received the technical approval No. AT/2006-08-0279.


conplast Installation diagram

Diagram of Conplast household sewage treatment plant


conplast Principle of operation

Household sewage is fed to septic tank (1), where they are pre-treated in the process of anaerobic digestion. Partially treated sewage flows through the post-treatment filter (2) and are directed to distribution chamber(3), which by it design provides its equal distribution to drainage pipes (6) and to the leach bed made of stone with a granulation of 15-40 mm (8), where the final biological treatment process takes place with participation of aerobic bacteria. Post-treated water soaks through the soil layers, is filtered and leached. Next comes the process of biological decomposition for mineral substances that finally leak into the groundwater. To ensure effective cycle function, an aeration and ventilation system should provide permanent air flow between aeration chimneys (10) and sewage system deaeration outlet in building (11).


conplast Septic tank - dimensions

Conplast septic tank


conplast Traditional drainage system based on leach bed made of breakstone or gravel with a granulation of 15-40 mm