FREMGANGSMAADE TIL NEDBRYDNING AF SAAKALDTE HAARDE SVOEMMELAG OG LIGNENDE I GYLLE- OG ANDRE AFFALDSLOEBSKANALER OG/ELLER TIL SEPARATION AF TOERSTOFINDHOLDET FRA GYLLE, HUSHOLDNINGS- OG INDUSTRISLAM SAMT AFFALDSPRODUKTER FRA AFGROEDER, PLANTE- OG/ELLER TRAEEKSTRAKT TIL ANVENDELSE VED FREMGANGSMAADEN SAMT ANLAEG TIL UDOEVELSE DERAF

摘要

Hard swimming layers in drainage conduits for animal sludge manure are decomposed and/or subjected to separation by treatment with a cellulose containing material, preferably straw, which is at least partly decomposed with an aqueous plant and/or wood extract, or are treated with such an extract alone, whereafter the heavy metals or heavy metal compounds, coarser and lighter nutrient-containing particles are separated. The extract is prepared by extraction of preferably finely divided plant and/or wood material in water at a pH of about the neutral point and at a temperature of up to about 30 DEG C. There is obtained an effective separation of solids, including nutrient-containing residual materials which can be reused, as well as heavy metals. Furthermore, the solids can be utilized for the production of biogas.