Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.4816
Publisher DOI: 10.1007/s11947-022-02981-3
Title: Comparison of phosphorus and phytase activity distribution in wheat, rye, barley and oats and their impact on a potential phytate separation
Language: English
Authors: Mayer, Natalie  
Widderich, Niklas 
Scherzinger, Marvin 
Bubenheim, Paul  
Kaltschmitt, Martin 
Keywords: Phytate separation; Grain processing; Phytase activation; Phosphorus recovery
Issue Date: 2023
Publisher: Springer Science + Business Media, LLC
Source: Food and Bioprocess Technology (): - (2023) (in press)
Abstract (english): 
When 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.
URI: http://hdl.handle.net/11420/14485
DOI: 10.15480/882.4816
ISSN: 1935-5149
Journal: Food and bioprocess technology 
Institute: Umwelttechnik und Energiewirtschaft V-9 
Technische Biokatalyse V-6 
Document Type: Article
Project: Projekt DEAL 
Peer Reviewed: Yes
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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