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Willert-Porada M.A.,University of Bayreuth | Gerdes T.,University of Bayreuth | Schmidt A.,Invertec
IEEE MTT-S International Microwave Symposium Digest

Purification of recycled platinum is a multi-step process of repeated dissolving of the scrap metal, precipitation of Platinum salts and thermal treatment of the salts to obtain a pure metal. As a new process, microwave heating is applied for dissolving platinum as well as for decomposition of the Pt-salts into sponge Platinum metal. The goal of microwave heating is reduction of process time, reduced utilization of chemicals like chlorine and savings on energy consumption. By use of microwave radiation at 2.45 GHz frequency all goals could be achieved. In addition, application of pulsed microwave heating enables tailoring of the Pt-metal morphology. © 2011 IEEE. Source

Leiber F.,Research Institute of Organic Agriculture FiBL | Gelencser T.,ETH Zurich | Stamer A.,Invertec | Amsler Z.,Research Institute of Organic Agriculture FiBL | And 3 more authors.
Renewable Agriculture and Food Systems

Protein sources other than soybean for the diets of poultry are needed for agricultural systems in temperate regions to help avoid some negative social and ecological impacts of large-scale soybean imports from overseas. The aim of the present study was to test the suitability of alternative protein sources in diets for slow-growing organic broiler chicken. Four experimental broiler diets were tested against a commercial feed for organic broiler chicken fattening (control), containing 255 g kg−1 soybean cake. Each experimental diet was based on the control diet, but 130 g kg−1 of soybean cake was replaced with alternative feeds. The diet ‘HermAlf’ contained 78 g kg−1 Hermetia meal (dried larvae of the black soldier fly, Hermetia illucens) and 52 g kg−1 alfalfa (Medicago sativa) meal. Diet ‘HermPea’ contained 78 g kg−1 Hermetia meal and 52 g kg−1 pea (Pisum sativum) groats. Diet ‘AlfPea’ contained 78 g kg−1 alfalfa meal and 52 g kg−1 pea groats. Diet ‘PeaAlf’ contained 78 g kg−1 pea groats and 52 g kg−1 alfalfa meal. Both diets containing Hermetia meal had the same amount of crude protein (CP) concentration as the control, while CP concentration was lower in diet AlfPea (by 2.7%) and in diet PeaAlf (by 3.5%) compared with the control. Over the course of the experiment, 15 broilers each (slow-growing Hubbard S757) were fattened with one of the five diets ad libitum from days 7 to 82. Additionally, all broilers received water and wheat grains (Triticum aestivum) ad libitum. Feed intake was measured by group. Daily gains, live weights, carcass weights and meat quality were analyzed individually. Compared with the control, feed intake, daily weight gain, carcass weights and feed efficiency were equivalent for all experimental diets. Regarding quality parameters, only cooking loss was increased with the HermPea diet compared with the control. The results indicate that the alternative feeds tested could replace part of the soybean products in broiler diets while achieving equivalent feed efficiency and product quality. Copyright © Cambridge University Press 2015 Source

Pajkic Z.,University of Bayreuth | Schmidt A.,Invertec | Gerdes T.,University of Bayreuth | Willert-Porada M.,University of Bayreuth
International Journal of Chemical Reactor Engineering

Convective heat transfer from solid to gas was investigated in a microwave heated fluidized bed and compared to an identical conventionally heated bed. Fluidizing gas was fed at room temperature and heated in contact with the bed solid phase. Solid phase temperature was varied in range of 300-600°C. Temperature difference of the two phases and heat loss by gas stream were measured in both heating types and discussed regarding chemical reaction engineering and energy efficiency. Advantages of microwave heating in such systems were elaborated with an outlook to perspective applications of the process in field of materials science and engineering. Copyright © 2011 The Berkeley Electronic Press. All rights reserved. Source

Willert-Porada M.,University of Bayreuth | Rosin A.,University of Bayreuth | Schmidt A.,Invertec | Gerdes T.,University of Bayreuth | Adam M.,University of Bayreuth
IEEE MTT-S International Microwave Symposium Digest

Analysis of microwave heating in a fluidized bed reactor, FBR, is presented. Simulation yields a detailed picture of selective heating by energy conversion from electromagnetic to thermal. However, particle movement and gas convection which distribute thermal radiation generated locally by microwave absorption into the volume of the FBR are not included. In order to analyze the superposition of microwave heating with convection and conduction in the FBR a unique 3D-temperature recording device has been applied. The simulated and the dynamic heating profiles are compared for an FBR filled with a microwave-absorbing material, like e.g., SiC. © 2014 IEEE. Source

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Visit us at our stand Number R08 at Busworld Kortrijk Belgium 2015 (16th-21st October) The Invertec Group is a leading UK/Malaysian manufacturer of lighting and interior components for the public transportation industry worldwide.Come and meet the team to discuss our new development on display including ceiling systems with integrated LED lighting, colour changing LED lighting systems and internal lightweight composite panels

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