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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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OPQS – optical process and quality sensing : exemplary applications in the beerbrewing and polyurethane foaming processes

Engelhard, Sonja, Kumke, Michael U., Löhmannsröben, Hans-Gerd January 2006 (has links)
Optical methods play an important role in process analytical technologies (PAT). Four examples of optical process and quality sensing (OPQS) are presented, which are based on three important experimental techniques: near-infrared absorption, luminescence quenching, and a novel method, photon density wave (PDW) spectroscopy. These are used to evaluate four process and quality parameters related to beer brewing and polyurethane (PU) foaming processes: the ethanol content and the oxygen (O2) content in beer, the biomass in a bioreactor, and the cellular structures of PU foam produced in a pilot production plant.
process analytical technology
beer
biomass
foam analysis
NIR spectroscopy
fluorescence quenching
photon density wave spectroscopy
Chemistry and allied sciences

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