Leandro Buchmann


Last Name

Buchmann

First Name

Leandro

ORCID

0000-0002-3601-4645

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2016 - 2019252020 - 20229
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Publications 1 - 10 of 34
  • Emerging pulsed electric field process development for bio-based applications
    Item type: Doctoral Thesis
    Buchmann, Leandro (2020)
  • Cultivation of Spirulina – Arthrospira platensis – in a photobioreactor and downstream processing for gentle protein recovery
    Item type: Other Conference Item
    Böcker, Lukas; Buchmann, Leandro; Caporgno, Martin; et al. (2018)
  • Development of a high voltage nanosecond pulsed electric field (nsPEF) reactor by use of multiphysics simulation
    Item type: Conference Poster
    Buchmann, Leandro; Böcker, Lukas; Mathys, Alexander (2017)
  • Concept of sustainable food processing demonstrated in a case study with pulsed electrical fields
    Item type: Other Conference Item
    Buchmann, Leandro; Mathys, Alexander (2019)
  • Comprehensive pulsed electric field (PEF) system analysis for microalgae processing
    Item type: Journal Article
    Buchmann, Leandro; Bloch, Robin; Mathys, Alexander (2018)
    Bioresource Technology
    Pulsed electric field (PEF) is an emerging nonthermal technique with promising applications in microalgae biorefinery concepts. In this work, the flow field in continuous PEF processing and its influencing factors were analyzed and energy input distributions in PEF treatment chambers were investigated. The results were obtained using an interdisciplinary approach that combined multiphysics simulations with ultrasonic Doppler velocity profiling (UVP) and rheological measurements of Arthrospira platensis suspensions as a case study for applications in the biobased industry. UVP enabled non-invasive validation of multiphysics simulations. A. platensis suspensions follow a non-Newtonian, shear-thinning behavior, and measurement data could be fitted with rheological functions, which were used as an input for fluid dynamics simulations. Within the present work, a comprehensive system characterization was achieved that will facilitate research in the field of PEF processing.
  • Stabilizing multiphase food systems with microalgae proteins
    Item type: Other Conference Item
    Böcker, Lukas; Bertsch, Pascal; Buchmann, Leandro; et al. (2021)
    Jahrestreffen der ProcessNet-Fachgruppen Lebensmittelverfahrenstechnik, Mischvorgänge, Grenzflächenbestimmte Systeme und Prozesse: Book of Abstract
  • Nanosecond Pulsed Electric Fields Applications Within the Bio-based Industry
    Item type: Other Conference Item
    Buchmann, Leandro; Bloch, Robin; Böcker, Lukas; et al. (2019)
  • Stabilizing multiphase food systems with microalgae proteins
    Item type: Other Conference Item
    Böcker, Lukas; Buchmann, Leandro; Bertsch, Pascal; et al. (2019)
    WFSC Research Symposium 2019 Proceedings
  • Perspective on Pulsed Electric Field Treatment in the Bio-based Industry
    Item type: Journal Article
    Buchmann, Leandro; Mathys, Alexander (2019)
    Frontiers in Bioengineering and Biotechnology
    The bio-based industry is urged to find solutions to meet the demands of a growing world population. In this context, increased resource efficiency is a major goal. Pulsed electric field (PEF) processing is a promising technological solution. Conventional PEF and the emerging area of nanosecond PEF (nsPEF) have been shown to induce various biological effects, with nsPEF inducing pronounced intracellular effects, which could provide solutions for currently faced challenges. Based on the flexibility and continuous operation of PEF and nsPEF processing, the technology can be integrated into many existing cultivation systems; its modularity provides an approach for inducing specific effects. Depending on the treatment conditions, selective inactivation, continuous extraction without impeding cell viability, as well as the stimulation of cell growth and/or cellular compound stimulation are potential applications in the bio-based industry. However, continuous treatment currently involves heterogeneous energy inputs. Increasing the homogeneity of PEF and nsPEF processing by considering the flow and electric field heterogeneity may allow for more targeted effects on biological cells, further increasing the potential of the technology for bio-based applications. We provide an overview of existing and potential applications of PEF and nsPEF and suggest that theoretical and practical analyses of flow and electric field heterogeneity may provide a basis for obtaining more targeted effects on biological cells and for further increasing the bio-based applications of the technology, which thereby could become a key technology for circular economy approaches in the future.
  • Adsorption kinetics and foaming properties of soluble microalgae fractions at the air/water interface
    Item type: Journal Article
    Buchmann, Leandro; Bertsch, Pascal; Böcker, Lukas; et al. (2019)
    Food Hydrocolloids
    Microalgae as a novel food ingredient are of increasing interest as they can be grown on non-arable land and fixate CO2 when grown photoautotrophically. Here, we employ proteins extracted from Arthrospira platensis biomass to be used for the stabilization of fluid interfaces, which is one of the most important techno-functional applications of proteins. Model foams were prepared from crude A. platensis powder and A. platensis isolate and whey protein isolate as a reference. The derived A. platensis isolate exceeded the overrun and the foam stability of whey protein isolate. The comparable low surface activity of crude A. platensis powder emphasizes the need for the extraction process. The neutral color of the A. platensis isolate indicates that the valuable natural pigments present in A. platensis were retained while achieving relevant techno-functional properties with the residual biomass. Physical treatment with nanosecond pulsed electric fields further increased the biomass yield without impeding the techno-functional properties of the derived isolates. Thus, protein extraction from microalgae biomass is an interesting approach to obtain techno-functional proteins and increase microalgae production efficiency.
Publications 1 - 10 of 34