Part 1 General issues 1. Circular, closed-loop agricultural systems: key principles and challenges: Rolf Meyer, Institute for Technology Assessment and Systems Analysis (ITAS), Karlsruhe Institute of Technology (KIT), Germany; 2. Understanding and developing closed-loop nutrient cycles in crop production: Theun Vellinga, Wageningen University and Research, The Netherlands; 3. Closed-loop combined crop-livestock farming systems: Friedhelm Taube, John Kormla Nyameasem and Friederike Fenger, University of Kiel, Germany; 4. Closed-loop precision farming technologies to optimize resource use: C. Maraveas and T. Bartzanas, Agricultural University of Athens, Greece; Part 2 Re-using agricultural and other wastes 5. Using crop residues/by-products as livestock feed in a circular economy: Andre F.
Brito and Kleves V. Almeida, University of New Hampshire, USA; and Luiz H. P. Silva, Western Kentucky University, USA; 6. Optimizing slurry management: David Fangueiro, LEAF-Instituto Superior de Agronomia-ULisboa, Portugal; Jihane Elmahdi, Wageningen University and Research, The Netherlands; Jared Nyang''au, Aarhus University, Denmark; Stamatis Chrysanthopoulos, LEAF-Instituto Superior de Agronomia-ULisboa, Portugal; Jerke De Vries, Wageningen University and Research, The Netherlands; and Peter Sørensen, Aarhus University, Denmark; 7. Optimizing livestock manure as a biofertilizer and bioenergy source: V. Riau, L. Morey, R.
Cáceres, M. Cerrillo and A. Bonmatí, Institute of Agrifood Research and Technology (IRTA), Spain; and A. Robles, BETA Tech Center (UVIC-UCC), Spain; 8. Safe and sustainable use of bio-based fertilizers in agricultural production systems: April Leytem, Robert Dungan, Mindy Spiehs and Dan Miller, United States Department of Agriculture, USA; Part 3 Co-products 9. Producing biogas from livestock manure and agricultural biomass: R. Fragoso, University of Lisbon, Portugal; D. Hidalgo, CARTIF Technology Center - Circular Economy Area, Spain; and M.
Paterson, Kuratorium für Technik und Bauwesen in der Landwirtschaft e.V. (KTBL), Germany; 10. Multi-feedstock biorefineries for converting agricultural wastes and microalgae into co-products: Butch Bataller, University of the Philippines at Los Baños (UPLB), The Philippines; and Sergio Capareda, Texas A&M University, USA; 11. Developing bioplastics from agro-industrial wastes for applications in food packaging: Angela Marchetti, Gaia Salvatori and Lionel Tayou Nguemna, Sapienza University of Rome, Italy; Mattia Grumi, Ahmet Ozan Basar, María Pardo-Figuerez, Jose Maria Lagaron and Cristina Prieto, Institute of Agrochemistry and Food Technology (IATA), Spain; Chiara Marcoaldi, Sapienza University of Rome, Italy and Institute of Agrochemistry and Food Technology (IATA), Spain; Marianna Villano and Mauro Majone, Research Center for Applied Sciences to the Safeguard of Environment and Cultural Heritage (CIABC) and Sapienza University of Rome, Italy; and David Bolzonella, University of Verona, Italy; 12. Developing polyphenols from agricultural wastes: J. Echave, M. Fraga-Corral, S.
Seyyedi-Mansour, L. Cassani, P. Garcia-Oliveira, Hui Cao, J. Simal-Gandara and M. A. Prieto, University of Vigo, Spain; and Jianbo Xiao, University of Vigo, Spain and Jiangsu University, China; Part 4 Case studies 13. Developing closed-loop dairy value chains and tools to support decision-makers: Jack B. Hetherington, University of Adelaide/CSIRO Agriculture and Food/Fight Food Waste Cooperative Research Centre, Australia; Pablo Juliano, CSIRO Agriculture and Food, Australia; and Rodolfo García-Flores, CSIRO Data61, Australia; 14.
Aquaponics: challenges and opportunities for commercial application: Lorenzo Rossi, Martina Puccinelli, Ilaria Marchioni, Luca Incrocci, Baldassare Fronte, Carlo Bibbiani and Alberto Pardossi, University of Pisa, Italy;.