1. Fraunhofer Research Institution for Materials Recycling and Resource Strategies IKWS, Brentanostraße 2a, 63755 Alzenau, Germany
2. Herbstreith & Fox GmbH & Co. KG Pektin-Fabriken, Turnstraße 37, 75305 Neuenbürg, Germany
3. University of Applied Sciences Giessen Friedberg, Wiesenstraße 14, 35390 Gießen, Germany