Noggerath^® Compact Unit Combi

Helgoland, Germany

Noggerath^® Compact Unit Combi 1400FF - Wastewater Treatment on the Island of Helgoland, Germany

Situation

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.

Commissioning

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.

Technical Data

2 x Passavant^® Fine Screens
Type: Step Screens in redundant installation
Max. Flowrate: 50 l/s at 40% blinding per screen
Gap width: 3 mm

Noggerath^® Screenings Wash Press
Type: NWP 250
Dry substance of the treated screenings 35-45%.

Grit Trap walkable
Length: 5,200 mm
Width: 1,400 mm
Grit removal capacity: 50 l/s: 90% for particle size >0.2 mm

Grease Trap walkable
Length: 5,200 mm
Width: 400 mm with separate grease trap

Noggerath^® Grit Washer, dry fed
Type: GW 400
Throughput capacity: 400 l/h washed grit
Loss on ignition < 3%, Dry matter content > 90%

Overall dimensions of the Compact Unit
Length approx.: 7,900 mm
Width approx.: 2,450 mm
Height approx.: 4,350 mm
Total weight approx.: 4,660 kg
Operating weight approx.: 19,260 kg