| Title | Fertilisers production from ashes after sewage sludge combustion - A strategy towards sustainable development |
|---|---|
| ID_Doc | 27681 |
| Authors | Gorazda, K; Tarko, B; Wzorek, Z; Kominko, H; Nowak, AK; Kulczycka, J; Henclik, A; Smol, M |
| Title | Fertilisers production from ashes after sewage sludge combustion - A strategy towards sustainable development |
| Year | 2017 |
| Published | |
| Abstract | Sustainable development and circular economy rules force the global fertilizer industry to develop new phosphorous recovery methods from alternative sources. In this paper a phosphorus recovery technology from Polish industrial Sewage Sludge Ashes was investigated (PolFerAsh - Polish Fertilizers form Ash). A wet method with the use of mineral acid and neutralization was proposed. Detailed characteristic of SSA from largest mono combustion plans were given and compared to raw materials used on the market. The technological factors associated with such materials were discussed. The composition of the extracts was compared to typical industrial phosphoric acid and standard values characterizing suspension fertilizers. The most favorable conditions for selective precipitation of phosphorus compounds were revealed. The fertilizers obtained also meet EU regulations in the case of the newly discussed Cd content. The process was scaled up and a flow mass diagram was defined. |
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