Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | NITROGEN RECOVERY FROM A STABILIZED MUNICIPAL LANDFILL LEACHATE |
| Abstract | The present paper reports the results of an investigation aimed at evaluating the effectiveness of magnesium ammonium phosphate precipitation (MAP), commonly called struvite, for removing ammonia from a mature municipal landfill leachate. MAP precipitation was carried out at laboratory scale by adding phosphoric acid and magnesium oxide as external sources of phosphorus and magnesium, respectively, and regulating the pH at 9.0. The effect of Mg:NH4:PO3 ratio was studied. Due to the low solubility of MgO, a low ammonia removal efficiency (i.e. 67%), with a rather high residual concentration, was obtained when the stoichiometric molar ratio was applied. However, by doubling the amount of magnesium oxide (i.e. by using a molar ratio of 2:1:1), ammonia removal efficiency increased up to 95% with a residual concentration compatible with a successive biological treatment. The struvite produced in the present study showed a composition close to the theoretical one. Furthermore, the precipitate was characterized by a heavy metal content much lower than that of typical raw soil, excluding any concern about heavy metal contamination in the case of its use as a fertilizer. The economic analysis of the process showed that ammonia can be removed at a cost of 9.6 EUR/kg NH4-Nremoved. This value can be greatly reduced, however, if the value of the struvite produced is considered. |
| Source | Bioresource technology 101, pp. 1732–1736 |
| Keywords | mature municipal landfill leachateammonia removalchemical precipitationstruvite. |
| Journal | Bioresource technology |
| Editor | Elsevier Applied Science,, Barking, Regno Unito |
| Year | 2010 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.biortech.2009.10.013 |
| Authors | DI IACONI C., PAGANO M., RAMADORI R., LOPEZ A. |
| Text | 42356 2010 10.1016/j.biortech.2009.10.013 ISI Web of Science WOS 000274271400025 mature municipal landfill leachate ammonia removal chemical precipitation struvite. NITROGEN RECOVERY FROM A STABILIZED MUNICIPAL LANDFILL LEACHATE DI IACONI C., PAGANO M., RAMADORI R., LOPEZ A. ISTITUTO DI RICERCA SULLE ACQUE The present paper reports the results of an investigation aimed at evaluating the effectiveness of magnesium ammonium phosphate precipitation MAP , commonly called struvite, for removing ammonia from a mature municipal landfill leachate. MAP precipitation was carried out at laboratory scale by adding phosphoric acid and magnesium oxide as external sources of phosphorus and magnesium, respectively, and regulating the pH at 9.0. The effect of Mg NH4 PO3 ratio was studied. Due to the low solubility of MgO, a low ammonia removal efficiency i.e. 67% , with a rather high residual concentration, was obtained when the stoichiometric molar ratio was applied. However, by doubling the amount of magnesium oxide i.e. by using a molar ratio of 2 1 1 , ammonia removal efficiency increased up to 95% with a residual concentration compatible with a successive biological treatment. The struvite produced in the present study showed a composition close to the theoretical one. Furthermore, the precipitate was characterized by a heavy metal content much lower than that of typical raw soil, excluding any concern about heavy metal contamination in the case of its use as a fertilizer. The economic analysis of the process showed that ammonia can be removed at a cost of 9.6 EUR/kg NH4 Nremoved. This value can be greatly reduced, however, if the value of the struvite produced is considered. 101 Articolo pubblicato proof.pdf Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. claudio.diiaconi DI IACONI CLAUDIO antonio.lopez LOPEZ ANTONIO michele.pagano PAGANO MICHELE roberto.ramadori RAMADORI ROBERTO TA.P07.002.002 Sviluppo di nuovi processi di controllo dell inquinamento idrico. |