Technical aspects of biological treatment plants

If the construction of a sewage system is technically or economically impossible, a drainless liquid waste tank or a household sewage treatment plant should be installed on the property (biological or drainage). Biological wastewater treatment plants are becoming more and more popular. Their purpose is to neutralize sewage at the production place, and then to discharge the treated sewage into the ground or a ditch by using an appropriate infiltration system, e.g. infiltration boxes. Before choosing a suitable sewage treatment plant, you should first check the water and soil conditions on the plot. This will allow you to select an appropriate treatment plant.

Technical data of biological wastewater treatment plants

The table below shows the basic technical parameters of biological wastewater treatment plants

Biological treatment plant	ZBS	ZBB	SOLIDO SMART	SOLIDO
Warranty [years]	3	3	25-year warranty on the tank and 3-year warranty on the treatment system	25-year warranty on the tank and 3-year warranty on the treatment system
Type of wastewater treatment	Sequential biological reactor SBR	Hybrid - activated sludge + biological deposit	Sequential biological reactor SBR	Sequential biological reactor SBR
Purification system	Retention chamber -> Aeration chamber	Initial settling tank - > Biological chamber -> Secondary settling tank	Aeration chamber	Retention chamber -> Aeration chamber
P.E. (population equivalent)	4,6,10	6,7,8,10,12	5,6,7	6,8,10,12,16,20
Max. ground cover [m]	0,5	1,3	1,5	2
Foundation in groundwater	YES*	YES*	YES * up to 1/3 of the tank height	YES*
Foundation in heavy soils	YES*	YES*	NO	YES*
* The tank should be properly covered with soil in accordance with the guidelines contained in the instructions for the tank.

You can read more about the types of household sewage treatment plants and building conditions here. Also check the guidelines for the location of the sewage treatment plant.