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  • 1.
    Hansen, Martin
    et al.
    Faculty of Health and Medical Sciences, University of Copenhagen.
    Björklund, Erland
    Kristianstad University, Plattformen för molekylär analys. Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment MoLab. Faculty of Health and Medical Sciences, University of Copenhagen.
    Popovic, Olga
    Faculty of Science, University of Copenhagen.
    Jensen, Lars S.
    Faculty of Science, University of Copenhagen.
    Jacobsen, Carsten S.
    Geological Survey of Denmark and Greenland (GEUS).
    Sedlak, David L.
    Department of Civil and Environmental Engineering, University of California, Berkeley.
    Halling-Sørensen, Bent
    Faculty of Health and Medical Sciences, University of Copenhagen.
    Animal manure separation technologies diminish the environmental burden of steroid hormones2015In: Environmental Science and Technology Letters, E-ISSN 2328-8930, Vol. 2, no 4, p. 133-137Article in journal (Refereed)
    Abstract [en]

    Newly developed treatment technologies are capable of separating livestock manure into a liquid fraction and a solid fraction using sedimentation, mechanical, and/or chemical methods. These technologies offer a potential means of distributing nutrients to agricultural lands without the unwanted environmental risks associated with the release of steroid hormones to adjacent waterways. To assess the potential benefit of these technologies in reducing the level of release of steroid hormones to adjacent waterways, distribution profiles of nine steroid hormones (pregnenolone, progesterone, dehydroepiandrosterone, androstenedione, testosterone, dihydrotestosterone, estrone, 17α-estradiol, and 17β-estradiol) were determined in raw swine manure, and in solid and liquid fractions separated from ten full-scale manure separation systems. Steroid hormone concentrations, normalized for nitrogen content, were significantly higher in separated solids than in liquids. If separated liquids are applied instead of raw manure, steroid hormone loading can be reduced by a factor of 2 at a constant nitrogen fertilization level.

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