title: New type of dry substances content meter using microwaves for application in biogas plants.
abstract: Dry substances (DS) are an important index for monitoring and controlling anaerobic co-digestion in biogas plants. We have developed and tested an online meter that measures suspended solids by means of the reflection coefficient of an exiting microwave signal, which is dependent on the dielectric properties of the suspensions. Intelligent models based on partial least squares regression (PLSR) and artificial neural network (ANN) for calibration allow exact and reproducible measurements under different circumstances. This measuring method is appropriate for contactless and online measurements of dry substance contents in biogas plants in a large range from 2-14%.
authors.affiliation: Institute of Bioprocessing and Analytical Measurement Techniques, Rosenhof, 37308 Heilbad Heiligenstadt, Germany. thomas.nacke@iba-heiligenstadt.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Nacke
authors.forename: Kathleen
authors.initials: K
authors.lastname: Brückner
authors.forename: Arndt
authors.initials: A
authors.lastname: Göller
authors.forename: Sebastian
authors.initials: S
authors.lastname: Kaufhold
authors.forename: Xenia
authors.initials: X
authors.lastname: Nakos
authors.forename: Stephan
authors.initials: S
authors.lastname: Noack
authors.forename: Heinrich
authors.initials: H
authors.lastname: Stöber
authors.forename: Dieter
authors.initials: D
authors.lastname: Beckmann
mesh_terms: D000383:Agriculture / Q000379:methods; D000465:Algorithms; D001185:Artificial Intelligence; D001704:Biopolymers / Q000032:analysis* / Q000737:chemistry*; D003890:Desiccation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis*; D008872:Microwaves; D009862:Online Systems; D011208:Powders / Q000032:analysis / Q000737:chemistry; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods
chemical_list: D001704:Biopolymers; D005740:Gases; D007220:Industrial Waste; D011208:Powders