Dr Víctor Riau currently works at the Sustainability in Biosystems program of the Institute of Agri-food Research and Technology (IRTA). Dr Riau's research is focused on chemical and environmental engineering, organic waste (water) treatment and valorisation, biogas production, nutrient removal and recovery and emission characterisation and mitigation

• Chapter 1 - Organic fertilizers and biofertilizers: Lidia Sas Paszt and Slawomir Gluszek, Research Institute of Horticulture, Poland; 1 Introduction2 Biofertilizers3 Consortia of microorganisms to improve the effectiveness of organic fertilization4 Animal excrement: manures, slurry and guano5 Products and by-products of animal origin6 Products and by-products of plant origin for fertilizers7 Composts8 Untreated minerals and by-products of selected industrial processes9 Biochar10 Conclusion11 Where to look for further information12 References Chapter taken from: Kӧpke, U. (ed.), Improving organic crop cultivation, Burleigh Dodds Science Publishing, Cambridge, UK, 2019, (ISBN: 978 1 78676 184 2)Chapter 2 - Assessing the effects of compost on soil health: Cristina Lazcano, University of California-Davis, USA; Charlotte Decock, California Polytechnic State University, USA; Connie T. F. Wong, University of California-Davis, USA; and Kamille Garcia-Brucher, California Polytechnic State University, USA; 1 Introduction2 Why compost?3 Effects of compost on soil nutrient cycling4 Effects of compost on soil hydraulic properties5 Effect of compost on crop productivity6 Effects of compost on soil biodiversity7 Effects of compost on environmental quality8 The use of compost to improve soil health in annual crops: a case study with strawberries9 The use of compost to improve soil health, sequester carbon and reduce greenhouse gas emissions in perennial crops: a case study10 Conclusion11 Where to look for further information12 References Chapter taken from: Horwath, W. R. (ed.), Improving soil health, Burleigh Dodds Science Publishing, Cambridge, UK, 2023, (ISBN: 978 1 78676 670 0)Chapter 3 - 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; 1 Introduction2 Current decision tools for optimizing manure management3 Modifying animal slurry pH to enhance its value as a biobased fertilizer: (bio)-acidification and alkalinization4 Improving manure management systems to minimize trade-offs5 Combining manure management with anaerobic digestion6 Preand post-treatment of biomass for anaerobic digestion7 Optimization of anaerobic digestion operations to optimize digestate quality8 References Chapter taken from: Chapter taken from: Amon, B. (ed.), Developing circular agricultural production systems, Burleigh Dodds Science Publishing, Cambridge, UK, 2024, (ISBN: 978 1 80146 256 3)Chapter 4 - 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; 1 Introduction2 Anaerobic digestion3 Mechanical separation4 Composting5 Struvite precipitation6 Stripping/scrubbing7 Membrane filtration8 Bioelectrochemical systems9 Case study: farm for the future10 Conclusion and future trends11 Where to look for further information12 References Chapter taken from: Chapter taken from: Amon, B. (ed.), Developing circular agricultural production systems, Burleigh Dodds Science Publishing, Cambridge, UK, 2024, (ISBN: 978 1 80146 256 3)