Side streams from the milling industry offer excellent nutritional properties for animal feed;yet their use is constrained by the elevated phosphorus(P)content,mainly in the form of phytate.Biotechnological P recovery...Side streams from the milling industry offer excellent nutritional properties for animal feed;yet their use is constrained by the elevated phosphorus(P)content,mainly in the form of phytate.Biotechnological P recovery fosters sustainable P management,transforming these streams into P-depleted animal feed through enzymatic hydrolysis.The enzymatic P mobilization not only enables P recovery from milling by-products but also supports the valorization of these streams into P-depleted animal feeds.Our study presents the scalability and applicability of the process and characterizes the resulting P-depleted rye bran as animal feed component.Batch mode investigations were conducted to mobilize P from 100 g to 37.1 kg of rye bran using bioreactors up to 400 L.P reductions of 89%to 92%(reducing from 12.7 gP/kg to 1.41-1.28 gP/kg)were achieved.In addition,High Performance Ion Chromatography(HPIC)analysis showed complete depletion of phytate.The successful recovery of the enzymatically mobilized P from the process wastewater by precipitation as struvite and calcium hydrogen phosphate is presented as well,achieving up to 99%removal efficiency.Our study demonstrates a versatile process that is easily adaptable,allowing for a seamless implementation on a larger scale.展开更多
基金funded by Deutsche Bundesstiftung Umwelt(PhANG,AZ 34976-01).
文摘Side streams from the milling industry offer excellent nutritional properties for animal feed;yet their use is constrained by the elevated phosphorus(P)content,mainly in the form of phytate.Biotechnological P recovery fosters sustainable P management,transforming these streams into P-depleted animal feed through enzymatic hydrolysis.The enzymatic P mobilization not only enables P recovery from milling by-products but also supports the valorization of these streams into P-depleted animal feeds.Our study presents the scalability and applicability of the process and characterizes the resulting P-depleted rye bran as animal feed component.Batch mode investigations were conducted to mobilize P from 100 g to 37.1 kg of rye bran using bioreactors up to 400 L.P reductions of 89%to 92%(reducing from 12.7 gP/kg to 1.41-1.28 gP/kg)were achieved.In addition,High Performance Ion Chromatography(HPIC)analysis showed complete depletion of phytate.The successful recovery of the enzymatically mobilized P from the process wastewater by precipitation as struvite and calcium hydrogen phosphate is presented as well,achieving up to 99%removal efficiency.Our study demonstrates a versatile process that is easily adaptable,allowing for a seamless implementation on a larger scale.
