Process-based modelling and simulation of nutrient recovery from organic waste

This SOP describes the computational procedure for process-based modelling and simulation of a multi-step nutrient recovery system from agricultural biowaste. The simulator, implemented in MATLAB, models mass and nutrient flows (N, P, K, Mg) through anaerobic digestion and downstream separation processes at the Biogas Wipptal facility in South Tyrol, Italy. Model outputs include struvite, liquid fertilizer (RO concentrate), and solid fertilizer pellets. A greenhouse crop simulator is coupled to estimate nutrient demand for tomato production under varying climate scenarios (CMIP6, RCPs 2.6/4.5/8.5) at three European locations (Trento, Berlin, Stavanger) and four time points (2025–2100). Input data were provided by project partners and are used secondarily within this procedure