Co -composting is a simple and inexpensive alternative for stabilizing and reducing jointly different biodegradable waste. In this study, the feasibility of co -composting chicken manure (CM), alperujo (AL), olive leaves/pruning (OL) and cereal straw (CS) was evaluated at full-scale. The different areas of a com- posting plant such as fermentation area, composting area and leachate lagoon, were evaluated from physico-chemical, respirometric and olfactometric points of view. The compostable mixture was previ- ously subjected to anaerobic fermentative pretreatment to hydrolyse the non -easy biodegradable organic matter and favour the subsequent composting process. The physico-chemical, respirometric and olfacto- metric characterization of the composted mixture showed a high -quality final product characterized by a 57 % average organic matter content, an adequate metal content (Compost type A) and a suitable micro- biological stability (SOUR max value of 14 mmol O 2 /kg VS h), complying with current national legislation for use as fertilizer in agriculture. Furthermore, the average global odour emission rate of the composting plant was 5.16 ou E /kg, considering the total mass of the compostable mixture and the time required to be treated. Finally, the leachate collected from different treatments of the compostable mixture was found to be a stabilized organic liquid waste with a high nutrient content, useful for wetting composting piles. ? 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.