totalmaterial requirement assessment of phosphorus sources from phosphate ore and urban sinks: sewage sludge andmswincineration fly ash

diversification of phosphorus sources can bring substantial synergy effects within all thesustainable development domains: environmental, economic and social, and such an opportunity should not beoverlooked. urban sinks accumulate phosphorus and other elements and may serve as sources of secondaryraw materials. this paper evaluates phosphorus sources based on their total material requirement (tmr).resource requirements and emissions of the conventional phosphorus production from mining through theacid route processing have been quantified and have been used as a yardstick against which to measure theperformance of two recycling options: spreading of sewage sludge and phosphorus recovery from municipalsolid waste incineration fly ash (mswa). the sludge spreading had the lowest tmr. phosphorus extractedfrom the mswahad four-fold higher tmr than the conventional production. however, method modificationswere suggested and are currently being tested, which reduce the methods tmr well below the tmr of thephosphorus production from the ore. the entire impact of the swedish mineral fertilizer demand can beavoided by recycling urban sinks of phosphorus. sweden can become self-sufficient in mineral fertilizerbecause the phosphorus quantities imported in food and later found in the urban sinks such as food waste,sewage sludge and msw incineration residues cover the entire necessary quantity.