The largest wastewater land treatment facility in operation in the Federal Republic of Germany is located in Braunschweig (Lower Saxony) and serves a population of about 290,000. The treatment process consists of three main components: a pre-treatment plant as an activated sludge process, a sprinkler irrigation area of 3,000 ha of farmland and an old sewage farm of 180 ha with surface flooding. This paper briefly summarizes the experiences with management and operation of the system, the treatment results with reference to environmental impact, development of agriculture and some financial aspects.

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