Design and construction of a prototype for the oxidation in supercritical water of mixtures of sludge (main matrix with phosphorus (P) and embedded energy from organic content) and other wastes for synergistic enhanced performance: manure (for ammonia elimination and P recovery), food wastes (for extra carbon) and complete destruction of organic toxic substances (pesticides and leachates), contributing to the water quality objectives of the Water Framework Directive and the Urban Waste Water Directive and the Nitrates Directive.

Determination of Operating conditions to optimise P recovery from wastes. Contributing to the objectives of the Resource Efficiency Roadmap (Wastewater Treatment Plants WWTP as resource factories).

Determination of Reduction in the final amount of waste generated in a WWTP and better quality for safe disposal, contributing to the objectives of the Waste Directive and the phasing out of land filling of organic wastes.

Determination of Economic balance linking environment, innovation & socioeconomic growth, particularly:

-Reduction of costs of sludge management versus current sludge management scheme.
-P cost of recovery compared to current market prices and tendencies of P from P-rock
-Cost of the treatment wastes compared to current treatment/disposal pathways.
-Economic balance of energy.
-Local socioeconomic assessment
-Dissemination effectiveness and social awareness assessment