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Environmentally sound treatment and use of livestock manure Summary of the results and comparative assessment / Umweltvertraegliche Guelleaufbereitung und -verwertung Zusammenfassung der Ergebnisse und vergleichende Bewertung

  • Huettner, A.
  • Kuhn, E.
  • Schiessl, K.
  • Schwab, M.
  • Kuratorium fuer Technik und Bauwesen in ...
Publication Date
Jan 01, 1999
OpenGrey Repository


In the Federal Republic of Germany approx. 220 mill. tonnes of organic manure are produced annually in cattle and pig management, of which 140 mill. tonnes are in the form of liquid manure. Errors in the use of organic manure (too much, at the wrong time, with inadequate technology) result in environmental stress in the form of emissions into the atmosphere and the hydrosphere. The primary objective of the BMBF (Federal Ministry of Education and Research) key field of promotion 'Environmentally Sound Treatment and Use of Livestock Manure' was to improve the possibilities of technical action to reduce such environmental harm, and in particular to protect the ground water against infiltration by nitrates and other slurry ingredients. To this end the state of the art of slurry treatment was to be advanced in order to provide farmers with efficient and economically acceptable alternatives to the current slurry treatment and spreading practice. The KTBL multisectoral project acted as a scientific parallel scheme. The subject of this multisectoral project was a comparative assessment of the newly developed methods under technological, ecological and economic aspects, characterisation of the new kinds of slurry products and their environmentally sound on-farm use, as well as an examination of the epidemiological aspects of the methods and the products. The assessment of the results revealed that due to the high costs and lack of operational reliability of the methods, chances of introducing more advanced slurry conditioning methods do not exist at the present time. In slurry surplus situations, partial conditioning methods enter into question for nutrient separation from liquid manure, especially solids separation. Slurry conditioning has to complete with simple methods such as transport and adapted feeding, which lead to similar relief of environmental stresses, but can be implemented more cheaply. Anaerobic treatment proved to be a method with promising prospects for the future, and this should be promoted by further activities in the fields of science and practical application. Positive effects relieving the burden on the environment can be achieved by combining existing techniques in feeding, storage, treatment and spreading of slurry. The precondition for this is consistent implementation of the relevant state of the art. The spreading of liquid manure has great potential. In this respect there is a further need to develop emission-reducing methods. (orig.) / SIGLE / Available from TIB Hannover: RN 7920(272) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische Informationsbibliothek / Bundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany); Bundesministerium fuer Ernaehrung, Landwirtschaft und Forsten, Bonn (Germany) / DE / Germany

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