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ePaper created 2017-03-14, 10:25:37 | version 1.49.03
simulation-based process development high-quality, sustainable products with regard to product selectivity as well as on energy- and material eficiency. In the future, a central issue will be further development of the separation and puriication steps, in order to optimize the process with regard to technical feasibility, overall eficiency and proitability. Contact Dipl.-Chem. (FH) Gerd Unkelbach Phone +49 3461 43-9101 gerd.unkelbach@cbp.fraunhofer.de Fermentative production of malic acid and xylonic acid In addition to the hydrothermal reaction, biocatalytic process- es are also suitable for the conversion of pentoses and hex- oses. There is a growing market for malic acid as it is used as a lavoring agent or for preservation of foodstuff. It also displays a potential as a polymer building block or in printing inks. The use of xylonic acid is also versatile, e.g. as a precursor for polyesters or hydrogels. The Industrial Biotechnology group at Fraunhofer IGB is developing fermentation processes for both products. In the second project phase, fermentation is carried out up to the 1-m³-scale in Leuna. Signiicant improvements have already been made in the laboratory development for the fermentative production of malic acid, achieving higher yields than with the state of the art. Outlook Literature [1] Peter, W.; Höglinger, O. (1986) Lenzinger Berichte, Heft 61: 12 – 16 [2] Bouvier, J. M.; Gelus, M.; Maugendre, S. (1988) Wood Lique- faction – An Overview. Appl Energy 30(2): 85 – 98. [3] Garrote, G.; Dominguez, H.; Parajo, J. C. (1999) Hydrothermal processing of lignocellulosic materials. Holz als Roh- und Werkst- off 57: 191 – 202 [4] Carvalheiro, F.; Duarte, L. C.; Girio, F.M. (2008) Hemicellulose bioreineries: a review on biomass pretreatments. J Sci Ind Res 67: 849 – 864 Funding In addition to the economic assessment of the experiments We would like to thank the German Federal Ministry of Educa- carried out at Fraunhofer CBP, DBFZ will work out an ecologi- tion and Research (BMBF) and the Project Management Jülich cal assessment of the advantages and disadvantages of this bioreinery concept in order to overcome the latter. Further pilot-scale tests also enable the production of sample quanti- ties for application characterization and determination of product speciications. (PTJ) for funding the project “KomBiChemPro”, promotional reference 031B0083A. Project partners Deutsches Biomasseforschungszentrum gemeinnützige GmbH, Leipzig | Thünen Institute of Wood Research, Hamburg* | Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg* | Universität Leipzig* * These partners are subcontractors of Fraunhofer CBP 1 Schematic concept of the joint project KomBiChemPro. 8 7