Sewage fertilizer
Sewage fertilizer is an organic fertilizer made from sewage sludge for agricultural land. Its use is controversial because of the heavy metals and pollutants that can get into the groundwater and the food chain. The utilization of sewage sludge as fertilizer is subject to the Sewage Sludge Ordinance (AbfKlärV) and the Fertilizer Ordinance (DüMV).
About 20% of the dry matter consists of valuable plant nutrients such as nitrogen , phosphorus and lime as well as magnesium and potassium . Sewage sludge of the highest quality that is precisely declared in accordance with the requirements of manure and which has the advantages of plant cultivation in terms of the direct nutrient effect , the humus supply and the lime effect are called sewage fertilizers.
Sewage fertilizer is a substitute for mineral fertilizers from the chemical mineral fertilizer industry.
The use of sewage fertilizer, sewage sludge or sewage sludge compost is prohibited in Austria in integrated viticulture , organic-biological viticulture and biodynamic viticulture .
See also
Individual evidence
- ↑ Bert-Andree Zucker, Wolfgang Müller, Gerd Schlenker (ed.): Compendium of animal hygiene . 5th edition. Lehmanns Media, Berlin 2016, ISBN 978-3-86541-909-5 , pp. 67 ( limited preview in Google Book search).