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.