The GRAF SBR wastewater treatment system Klaro Easy works according to the principle of SBR lifting technology. No live parts need to be installed in the tank. All movement processes are performed by three air lift pumps, which are operated using a compressor. The compressor also provides the plate ventilator on the bottom of the SBR reservoir with air. The compressor and all other technical components are low maintenance and stored in a switch cabinet, which can be installed in the plant room of the house.

No live technology in the reservoir
The GRAF SBR wastewater treatment system Klaro Easy does not need consistent integration of live technology in the tank. All movement processes are performed by an air compressor, which is built into the Klaro system control. The distribution of air in the individual pump processes is realised via the control. The air compressor is very durable and whisper-quiet.
Low maintenance
The compact switch cabinet for system control with air compressor and valve unit is installed in the plant room of the house and requires little maintenance. The LCD display shows the operating hours of the individual devices. Any power failure is indicated with a visual and audio alarm. All components installed in the switch cabinet are arranged in such a way that they can be exchanged very easily. This modular design saves a lot of time and, therefore, money on any maintenance or repair work.
Simple installation
The air pressure hoses of the reservoir and the corresponding connections to the system control are colour-coded. This avoids installation errors. Already fitted to the carrier system at the factory, so the whole system just needs to be fitted to the baffle of the reservoir. Thanks to the Klaro Easy carrier system, the purifying technology is extremely fast to install (one-reservoir system).
Flexible, as expandable
The SBR wastewater treatment system Klaro Easy can be flexibly adjusted to changing conditions by altering the cycle times. The system can also be switched to holiday mode. The aeration automatically adjusts to the load with the convenience package.
Klaro Easy one-reservoir system
| Inhabitants (max.) | Total volume (ltrs) | Capacity (ltrs) | Length (mm) | Width (mm) | Height (mm) | Weight (kg) |
| 2-4 | 3750 | 3750 | 2280 | 1755 | 2200 | 175 |
| 4-6 | 4800 | 4800 | 2280 | 1985 | 2430 | 220 |
| 6-8 | 6500 | 6500 | 2390 | 2190 | 2710 | 265 |
Klaro Easy two-reservoir system
| Inhabitants (max.) | Total volume (ltrs) | Capacity (ltrs) | Length (mm) | Width (mm) | Height (mm) | Weight (kg) |
| 2-4 | 5400 | 2x2700 | 2080 2080 |
1565 1565 |
2010 2010 |
120 120 |
| 4-8 | 5400 | 2X2700 | 2080 2080 |
1565 1565 |
2010 2010 |
120 120 |
| 8-10 | 7500 | 2X3750 | 2080 2080 |
1755 1755 |
2200 2200 |
150 150 |
| 10-12 | 9600 | 2X4800 | 2080 2080 |
1985 1985 |
2430 2430 |
185 185 |
| 12-18 | 13000 | 2X6500 | 2390 2390 |
2190 2190 |
2710 2710 |
220 220 |
How does it work?
With the SBR technology (sequencing batch reactor) there is separate primary treatment to retain the coarse material and a combined sludge activation and final treatment reservoir, the so-called SBR reservoir. This system comprises 2 chambers.
1. Charging phase
The wastewater goes first into primary treatment (1st chamber), where the solid substances are retained. From there, the wastewater is fed into the SBR reservoir (2nd chamber).
2. Aeration phase
The actual biological cleaning by microorganisms now occurs in the SBR reservoir. Short aeration and rest phases interchange in a controlled cleaning process. The so-called ctivated sludge can now develop with millions of microorganisms and clean the water thoroughly.
3. Rest phase
A rest phase now follows, during which the live sludge sinks to the bottom of the system. This allows a clarified water zone to form at the top of the SBR reservoir.
4. Sewage water draw-off
The purified wastewater is now be fed into a discharge system (stream, river, sea) or into a infiltration system. Afterwards, the sludge is fed back from the SBR reservoir into the first chamber.
