Situation
Noggerath® Compact Unit Combi
Helgoland, Germany
Noggerath® Compact Unit Combi 1400FF - Wastewater Treatment on the Island of Helgoland, Germany
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The high seas island of Helgoland has had its own sewage treatment plant since the late 1980s, which was operated as a continuous flow reactor. The plant was no longer able to meet all requirements of a modern wastewater treatment plant and also had severe structural defects.
In addition, large seasonal fluctuations have to be covered, as the island receives approx. 350,000 visitors per annum - mainly during the summer season. In 2019, after the clearance of explosive ordnance, the construction of the new wastewater treatment plant on the island of Helgoland began with a capacity of 6,150 PE. The mechanical pre-treatment has been realized by the Noggerath® Compact Unit. The pre-treatment was put into operation in December 2020.
Solution
The solution is the Noggerath® Compact Unit made of stainless steel, which has been installed above ground in modular design and covers all cleaning steps of a mechanical pre-treatment within one machine.
2 Passavant® Fine Screens with subsequent screenings treatment including dewatering and transport are installed on the grit trap. Due to a grit trap aeration, the grease enters the integrated grease trap and is collected separately. The sedimented grit is conveyed to a Noggerath® Grit Washer, which separates the organic matter from the grit, dewaters the grit and discharges it.
Commissioning
December 2020
Technical Data
| Lenght | Width | Height | Total weight | Operating weight |
|---|---|---|---|---|
| 7,900 mm | 2,450 mm | 4,350 mm | 4,660 kg | 19,260 kg |
| Products | Type | Performance | Dimensions | other Data |
|---|---|---|---|---|
| 2x Passavant® Fine Screens | Step Screens in redundant installation | max. Flowrate: 50 l/s at 40% blinding per screen | Gap width: 3 mm | - |
| Noggerath® Screenings Wash Press | NWP 250 | - | - | Dry substance of the treated screenings 35-45% |
| Grit Trap walkable | - | Grit removal capacity: 50 l/s: 90% for particle size >0.2 mm | (LxW) 5,200 x 1,400 mm | - |
| Grease Trap walkable | - | - | (LxW) 5,200 x 400 mm | - |
| Noggerath® Grit Washer, dry fed | GW 400 | Throughput capacity: 400 l/h washed grit | - | Loss on ignition < 3%, Dry matter content > 90% |
