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Item type:Publication, Access status: with files , Environmental assessment of phosphorus reduction in rye bran fodder from processing to feeding(Springer, 2026-03-24); ; ; ; An innovative process enables the reduction of phosphorus (P) content in rye bran used as animal fodder. The goal of P extraction is to produce P-reduced feed that lowers P in animal excretion, thereby decreasing eutrophication risks from runoff or leaching into water ecosystems. This article assesses the environmental impacts of both the P extraction process and the use of P-reduced fodder in animal husbandry through a life cycle approach. The analysis includes two stages: (1) environmental assessment of P-reduced bran production via different extraction routes, and (2) assessment of its use as a fodder for pigs. Two extraction routes—thermo-chemical and enzymatic—are evaluated for the “Global Warming” and “Terrestrial Acidification” impacts. The results show that the enzymatic route is characterized by lower values in both impact categories, generating 150 kg CO₂ eq. and 0.2 kg SO₂ eq. compared to 1 863 kg CO₂ eq. and 7.5 kg SO₂ eq. from the thermo-chemical route. In the use stage, the effects of co-feeding pigs with P-reduced bran are analysed for “Global Warming” and “Eutrophication” impacts. P eq. emissions (“Eutrophication”) are reduced by 4%. Yet, the energy-intense processing of P-reduced bran increases the overall greenhouse gas emissions. Feeding untreated bran results in 3 352 kg CO₂ eq. per 1 000 kg carcass weight, while the co-feeding with the P-reduced bran from the thermo-chemical and enzymatic routes leads to 5 672 kg CO₂ eq. and 3 911 kg CO₂ eq., respectively.Publicationtype: Journal Article7 7 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , An up-scaled biotechnological approach for phosphorus-depleted rye bran as animal feed(Springer, 2024-05-13); ; ; ; 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. Graphical Abstract: (Figure presented.).Publicationtype: Journal Article17 15 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Rye bran as a component in the diets of lactating sows : effects on sow and piglet performance(Multidisciplinary Digital Publishing Institute (MDPI), 2024-01-24); ; ; ; From a cost and sustainability perspective, the use of by-products such as rye bran in sow diets is of particular interest. Rye bran has valuable ingredients that have potential benefits for the gut health of sows. The aim of this study was to investigate the effects of including 15% rye bran in the sows’ feed on the performance of sows and piglets. The feeding started one week before the farrowing date and ended at weaning. Performance was evaluated by measuring sow (n = 175) and piglet body weight (n = 1372) and sows’ backfat thickness (n = 80). These data were additionally used to calculate the colostrum intake of the suckling piglets and the sows’ milk production. It was found that there were no differences in the performance parameters between the experimental and control groups. However, this study showed that the piglets with light birth weight (LBW (<1000 g)) and medium birth weight (MBW (1000-1500 g) consumed more colostrum when the sows were fed rye bran (LBW: C/R 203.0 +/- 39.2 g/214.3 +/- 35.9 g; MBW: 291.3 +/- 39.0 g/298.5 +/- 36.4 g). It can be concluded that including 15% rye bran in the feed of lactating sows has no obvious negative effects on the performance of sows and piglets. Further studies are needed to evaluate the possible positive effects of rye bran.Publicationtype: Journal Article31 58 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Rye and rye bran as components of diets in piglet production : effects on Salmonella Prevalence(Multidisciplinary Digital Publishing Institute (MDPI), 2023-07-10); ; ; ; The nutritional benefits of rye (and therefore rye bran) are mainly due to its high content of fermentable dietary fiber, the non-starch polysaccharides (NSP). Microorganisms in the large intestine are able to convert these into short-chain fatty acids (SCFA), including butyrate. Butyrate strengthens the epithelial barrier function in the colon by nourishing the enterocytes and inhibiting the spread of Salmonella in the intestinal tract. Therefore, the aim of this study was to test under field conditions whether a diet with rye or rye bran as the main ingredient for gilts, sows, and weaned piglets is associated with a lower Salmonella prevalence. Depending on the age groups, between 20-30% rye or between 15-20% rye bran was used in the experimental group. A total of n = 1983 boot swabs, n = 356 fecal samples, and n = 1909 serum samples were examined. The results of this study show that rye or rye bran at the levels used had no apparent effect on the number of positive Salmonella samples. However, the Salmonella OD values in the experimental groups were significantly lower than in the control group. This suggests that the use of rye leads to a lower incidence of infection, but this effect could not be proven from swabs.Publicationtype: Journal ArticleScopus© Citations 1 54 88 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Plant-based fructans for increased animal welfare: provision processes and remaining challengesFructans are carbohydrates consisting of fructose monomers linked by β-2,1- and/or β-2,6-glycosidic bonds with linear or branched structure. These carbohydrates belong to the group of prebiotic dietary fibre with health-promoting potential for humans and mammals due to their indigestibility and selective stimulation of microorganisms in the gastrointestinal tract. This makes fructans interesting mainly for healthy food as well as animal feed applications. As a consequence of a growing public awareness for animal welfare, dietary fibre and thus fructans move into the focus as a fibre-rich feeding improving not only animals’ health but also their well-being. Against this background, this paper summarises the known effects of fructans focusing on pigs and highlights the state of the art in fructan production processes from plant material as well as selected current research lines. Additionally, an attempt is made to assess the potential of European fructan production for an application as animal feed. Based on this, challenges in the field of fructan production are addressed and alternative substrates for fructans are discussed and pointed out.Publicationtype: Review ArticleScopus© Citations 7 123 142 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Conditioning of Feed Material Prior to Feeding: Approaches for a Sustainable Phosphorus Utilization(Multidisciplinary Digital Publishing Institute (MDPI), 2022-03-28); ; ; ; A circular phosphorus (P) bioeconomy is not only worthwhile for conserving limited mineral P reservoirs, but also for minimizing negative environmental impacts caused by human-made alterations. Although P is an essential nutrient, most of the P in concentrates based on cereals, legumes and oilseed byproducts is organically bound to phytate. The latter cannot be efficiently utilized by monogastric animals and is therefore diluted into the environment through the manure pathway. This review examines various strategies for improved P utilization in animals and reflects the respective limitations. The strategies considered include feeding of debranned feedstuffs, pre-germinated feed, co-feeding of phytase and feeding material with high native phytase activity. All these approaches contribute to an improved P bioavailability. However, about half of the organic P content continues to be excreted and therefore remains unused by the animals. Nevertheless, technologies for an efficient utilization of P from cereal-based feed already exist; however, these are not industrially established. Conditioning feed material prior to feeding fosters P-reduced feed; meanwhile, P bound to phytate can be recovered. Based on known techniques for P separation and solubilisation from cereal products and phytate conversion, potential designs for feed material conditioning processes are proposed and evaluated.Publicationtype: Journal ArticleScopus© Citations 6 89 192