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  4. Sustainable phosphorus from cereal-based animal feed
 
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Sustainable phosphorus from cereal-based animal feed

Publikationstyp
Conference Presentation
Date Issued
2023-06
Sprache
English
Author(s)
Mayer, Natalie  orcid-logo
Umwelttechnik und Energiewirtschaft V-9  
Kaltschmitt, Martin  
Umwelttechnik und Energiewirtschaft V-9  
TORE-URI
https://hdl.handle.net/11420/44568
Citation
31st European Biomass Conference and Exhibition, EUBCE (2023)
Contribution to Conference
31st European Biomass Conference and Exhibition, EUBCE 2023  
Publisher Link
https://www.eubce.com/previous-events-2023/
Publisher
EUBCE
Phosphorus (P) is one of the most important elements on earth as no kind of life is possible without P and, at the same time, P is a very limited mineral resource (Lott et al., 2011). Both are strong reasons why to maintain P within an accessible terrestrial cycle for further use. Largest losses currently occur in agriculture from excess fertilizing by mineral and organic fertilizers. Especially manure from monogastric animals contain high amounts of organic P as monogastric animals can’t digest P in cereal-based feed, which is in phytate form (Mayer and Kaltschmitt, 2022). Excess P on cropland leads to wash-out and finally to eutrophication especially in standing water bodies (Conley et al., 2009).
We aim to make P in cereal-based animal feed available and thus close the terrestrial P cycle before wash-out. Therefore, a process for the extraction and conversion of phytate-P in rye bran as a natural substrate has been developed. The residual phosphate is recovered in salt form by precipitation as magnesium or calcium phosphate and is, thus, available for feed or fertilizer industry. So far, we achieved maximum phytate conversion of 98.5% by acidic treatment of rye bran extract at 200 °C. Recovery was successful with phosphate reduction of over 99%. Thus, we present a solution to the nutritional problem of little P availability in cereal-based animal feed and to the environmental problem of increasing eutrophication of waterbodies.
DDC Class
333.7: Natural Resources, Energy and Environment
540: Chemistry
620: Engineering
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