KLARO - SBR treatment & quality

The KLARO principle
The SBR method
Effluent classes
Modular design



The KLARO principle for small wastewater treatment plants


No mechanical parts, no pumps and no electrical parts in the wastewater - for a safe operation and security!

KLARO small wastewater treatment plant:

  • Received the general building inspectorate certification by the German Institute for Building Engineering
  • Safe operation, since there are no mechanic, live or electrical parts in the container and wastewater. All pumping processes are performed by blown-in air
  • This smart use of physical processes makes it possible to avoid the installation of electrical aggregates into the wastewater treatment plant
  • In the rare case of damaged components, only a technical component has to be exchanged in the control cabinet. It is not necessary to climb into the pit.
  • It is not necessary for an electrician to climb into the pit and conduct an excessive moulding procedure to the damaged components , to prevent explosion hazard. There is a more intelligent way!
  • Only plug connections are used that comply with the legal guidelines according to VDO/VDE, since no electrical parts are in the water
  • Due to power outage detection, only two maintenance jobs a year needed!

The SBR method


Back to nature - the natural cycle.


Every single person in Germany uses an average of 130 litres of water per day – water which then needs to be treated after use. KLARO small wastewater systems bring domestic wastewater back into nature without posing any kind of risk and therefore harmonising the natural cycle.

We achieve this aim by means of the SBR method. SBR stands for: Sequencing Batch Reactor

Loading phase
Aeration phase
Rest phase
Clearwater extraction

1. Loading phase

The wastewater is initially fed into the sludge tank (1st chamber) where solid constituents are removed. From here, the wastewater is then gradually led into the SBR tank (2nd chamber).

2. Aeration phase

The SBR tank is where the actual biological treatment process takes place. Here, short aeration and rest phases alternate with one another within the scope of a controlled cleaning process. This means that the so-called activated sludge with its millions of micro-organisms can develop and treat the water thoroughly.

3. Rest phase

During the 90-minute rest phase, the activated sludge then settles on the bottom of the tank. A clear water zone forms in the upper part of the SBR tank.

4. Clearwater extraction

The separated clear water is then led from the SBR tank to the receiving water (stream, river or lake) or into a percolation system. Afterwards, the sludge is returned to the first chamber from the SBR tank and the process starts again from the beginning.

Effluent classes / Purification performance


Future-oriented, state-of-the-art technology.


KLARO technology achieves what others can´t. Today, the values reached by KLARO are 70 % lower than required by law. This implies safety for the future – even if the legal requirements for wastewater become stricter in the future.

Effluent values KLARO Easy

Fit for the future- thanks to a modular design


The small wastewater treatment plant by KLARO can be flexibly adjusted to the requirements of tomorrow. Our cube shows how this is implemented.

The modular design by KLARO ensures extraordinary security for the future and your investment. Thus, the small wastewater treatment plant by KLARO can be adjusted to changed requirements.
If necessary, software updates can be used to ensure flexible adjustments.