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Item type:Publication, Access status: with files , Influence of fluidized bed process parameters and material properties on plant powder characteristics and reconstitution behaviorPlant-based milk alternatives (PBMAs) are increasingly used in food applications owing to their nutritional value and lower environmental impact compared with conventional dairy products. However, their successful reconstitution remains challenging because plant proteins and dietary fibers promote lump formation, thereby impairing wetting and dissolution. Although fluidized bed agglomeration is widely applied to improve the instant properties of food powders, the combined influence of formulation composition and process parameters on the reconstitution behavior of PBMAs has not yet been systematically investigated. In this study, three representative PBMA formulations with different dominant compositional characteristics were agglomerated in a fluidized bed. A statistical Design of Experiments (DoE) approach was applied to investigate the interaction between formulation composition and fluidized bed process parameters on powder structure, wettability and lump formation during reconstitution. The results identified liquid spray rate and spray air pressure as the dominant process parameters governing agglomerate growth, while formulation composition strongly affected powder wettability. The protein- and fiber-enriched formulations exhibited larger contact angles and reduced wettability than the carbohydrate-rich reference formulation. Furthermore, contact angle correlated with lump diameter, indicating that wetting represents a rate-limiting step during powder reconstitution. The generated DoE models provide a framework for formulation-specific adjustment of fluidized bed process parameters to tailor powder structure and minimize lump formation.Publicationtype: Journal Article10 2 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Structuration of plant-based milk powder for improved reconstitutionPublicationtype: Doctoral Thesis21 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Integration of oleaginous yeast-produced lipids into plant-based milk alternatives(Elsevier, 2024-12-01); ; ; ; In this study, the production of a novel oleaginous yeast-based milk powder alternative is presented. Three formulations, comprising yeast oil, oleaginous yeast cell lysate, and whole cells, were analyzed and compared to a reference formulation, covering the entire process from fermentation to powder analysis. The whole cell formulation exhibited highest encapsulating efficiency and low surface lipid content, indicating improved stability. Moreover, the formulation with cell lysate and whole cells showed larger oil droplet sizes in emulsions and spray-dried particles, and higher viscosity in rheological studies compared to the reference formulation. Electron microscopic images revealed morphological differences in spray-dried particles, emphasizing the impact of yeast oil integration. Concluding, formulations using oleaginous yeast present a complex system with diverse components. While this research pioneers oleaginous yeast integration into milk alternatives, further experiments are essential for a comprehensive understanding of observed effects and unlocking the full potential of these innovative and novel formulations.Publicationtype: Journal Article22 159 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Influence of material characteristics on plant-based milk alternative properties(Elsevier, 2024-07); ; 34 14 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Influence of nozzle parameters on spray pattern and droplet characteristics for a two-fluid nozzleIn this study, a two-fluid nozzle, as, e.g., used in fluidized-bed or spray drying applications, is comprehensively characterized regarding the spray pattern and droplet size. To analyze the spray cone, the spray cone angle and the radial mass distribution of the nozzle were measured at varied liquid flow rate, spray air pressure, liquid insert bore diameter, and air cap position. Additionally, droplet size distributions were recorded at different spray settings. In general, the overall spray cone and single droplets are significantly influenced by the spray parameters, especially the spray air pressure, as well as the nozzle geometry.Publicationtype: Journal ArticleScopus© Citations 3 169 207