The efficiency of biogas production during anaerobic digestion depends heavily on optimal dosing ratios and stable operations which can not be achieved without accurate and reliable monitoring and control of the dry matter (DM) and organic dry matter (oDM) content. The materials in biogas processes to be measured are either stored in a vessel flowing in a pipe, either as a liquid or as solid particles in pneumatic or liquid assisted transportation with a wide area of the content of DM (1% < DM > 90). In such cases microwave sensors provide an attractive solution, because microwaves penetrate most materials allowing the non destructive measurement to be representative for a special volume or the cross section of the pipe. The setup of the measuring system for materials with high water content and first results are presented.
Den vorgestellten Arbeiten liegt die Idee zugrunde, mit Hilfe einer Acetyltransferase, die kürzlich aus Taxus baccata isoliert werden konnte, Baccatin III kontinuierlich in einem Enzymreaktor herzustellen. Substrat der enzymatischen Umsatzreaktion ist das aus Eibenverschnitt gewonnene 10-Deacetylbaccatin III. Ziel der Arbeiten ist die Ausbeutesteigerung und Kostenreduktion bei der Semisynthese von Paclitaxel, einem sehr wirksamen Cytostatika.
There is a widespread need for highly-sensitive robust sensors for process measurements in microfluidics that have no direct contact to the fluid. This contribution describes how the measurement of the variation of the dielectric properties (conductivity and permittivity) offers an innovative approach to investigating biological and chemical matter and processes in microsystems, for example, cell growth, cell metabolite changes, and the concentration of large aqueous-based molecules. This presentation describes an innovative high frequency sensor that integrates RF/microwave detection in a microfluidic network for quick and precise biological and chemical analysis. It consists of a microstripline waveguide with resonant properties placed adjacent to a microfluidic channel. Contactless conductivity detection is of high interest for many applications in microfluidics and it is particularly attractive for measuring the concentration of inorganic and organic ions and matter that are not directly accessible by optical means.
E-Mail: christian.faenger@umsicht.fhg.de P r o f. D r. r e r. n a t . M . U. U l b r i c h t 2 ) D r. -I n g . G. D. D e e r b e r g 1 ) P r o f. D r. -I n g . J. B. B ü c h s 3 )
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