An up-scaled biotechnological approach for phosphorus-depleted rye bran as animal feed  

作　　者：Niklas Widderich Johanna Stotz Florian Lohkamp Christian Visscher Ulrich Schwaneberg Andreas Liese Paul Bubenheim Anna Joëlle Ruff 

机构地区：[1]Institute of Technical Biocatalysis,Hamburg University of Technology,Hamburg,Germany [2]Institute of Biotechnology,RWTH Aachen University,Aachen,Germany [3]Institute for Animal Nutrition,University of Veterinary Medicine Hanover,Foundation,Hanover,Germany.

出　　处：《Bioresources and Bioprocessing》2024年第1期662-674,共13页生物资源与生物加工(英文)

基　　金：funded by Deutsche Bundesstiftung Umwelt(PhANG,AZ 34976-01).

摘　　要：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.

关 键 词：Valorization of plant byproducts Phosphorus reduced animal feed Phosphorus mobilization Up-scaling 

分 类 号：X70[环境科学与工程—环境工程]