Evaluatie van verwerkingsinstallaties voor mest en co-vergiste mest

This final report of the four-year PPS (public-private collaboration) project ‘Meerwaarde Mest en Mineralen 2 (More Value from Manure and Minerals 2): nutrient recovery from manure’ contains the evaluation of five large-scale installations for processing of animal manure or co-digested animal manure (digestate). The different processing techniques of the installations include hygienisation, solid-liquid separation, drying and pressing of the solid fraction and production of mineral concentrate and dischargeable water by means of membrane filtration and ion exchangers or by means of membrane filtration and biological treatment. Based on a performed monitoring of the installations the achieved separation efficiencies, (nutrient) mass balances, processing costs and composition, agronomic and environmental quality of the end products, have been evaluated. Also the environmental gains of processing were calculated via a simplified life cycle assessment (LCA). Moreover, the construction, monitoring and evaluation of an innovative installation which separates the solid fraction of co-digested animal manure into a phosphate (P) fertiliser and an organic low-P soil improver was a central part of the project. Finally, recommendations are given for environmentally beneficial adaptations of manure processing installations in the Netherlands.