Mayer, NatalieNatalieMayerWidderich, NiklasNiklasWidderichScherzinger, MarvinMarvinScherzingerBubenheim, PaulPaulBubenheimKaltschmitt, MartinMartinKaltschmitt2023-01-042023-01-042023-01-03Food and Bioprocess Technology 16 (5): 1076-1088 (2023)http://hdl.handle.net/11420/14485When facing today’s scarcity of mineral phosphorus (P) resources and the environmental issues following enhanced P losses especially from agriculture, new solutions need to be implemented. In this framework, the potential for a mechanical separation of a P rich grain fraction from wheat, rye, barley and oats is investigated in order to provide animal feed with reduced organic P content. Thus, P accumulation in manure and soils should be prevented. Also, the subsequent utilization of the separated organic P, which occurs in the form of inositol P, for a sustainable P management via activation of intrinsic enzymes is evaluated. It was shown that in grain layers at 7.0, 5.5, 6.4 and 2.5% cross section of wheat, rye, barley and oats, respectively, maximum inositol P occurs with 1.6, 0.8, 1.4 and 1.2 g/100 g. Phytase activity is also highest in the outer layers of the grains with maxima of 9300, 12,000, 8400 and 2400 U/kg, respectively. A removal of the specific layers where inositol P is accumulated could possibly achieve a 24, 31, 60 and 27% organic P reduction for wheat, rye, barley and oats with 7, 14, 25 or 7% grain elimination. A debranning, eliminating all the outer grain layers to a certain extent, in contrast, leads to significantly higher mass losses. Within the P enriched layer determined from inositol P distribution, phytase activity is calculated to be around 285, 831, 777 and 42 U/kg for wheat, rye, barley and oats, respectively.en1935-5149Food and bioprocess technology2023510761088Springer Science + Business Media, LLChttps://creativecommons.org/licenses/by/4.0/Phytate separationGrain processingPhytase activationPhosphorus recoveryNaturwissenschaftenIngenieurwissenschaftenLandwirtschaft, VeterinärmedizinComparison of phosphorus and phytase activity distribution in wheat, rye, barley and oats and their impact on a potential phytate separationJournal Article10.15480/882.481610.1007/s11947-022-02981-310.15480/882.4816Journal Article