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Simultaneous ammonium and phosphate recovery and stabilization from urban sewage sludge anaerobic digestates using reactive sorbents
dc.contributor.author | Hermassi, Mehrez |
dc.contributor.author | Dosta, Joan |
dc.contributor.author | Valderrama Ángel, César Alberto |
dc.contributor.author | Licon Bernal, Edxon Eduardo |
dc.contributor.author | Moreno Palmerola, Natàlia |
dc.contributor.author | Querol Carceller, Xavier |
dc.contributor.author | Batis, Narjes |
dc.contributor.author | Cortina Pallás, José Luís |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química |
dc.date.accessioned | 2018-04-27T08:29:38Z |
dc.date.available | 2018-04-27T08:29:38Z |
dc.date.issued | 2018-07-15 |
dc.identifier.citation | Hermassi, M., Dosta, J., Valderrama, C., Licon, E., Moreno Palmerola, Natàlia, Querol , X., Batis, N., Cortina, J. Simultaneous ammonium and phosphate recovery and stabilization from urban sewage sludge anaerobic digestates using reactive sorbents. "Science of the total environment", 15 Juliol 2018, vol. 630, p. 781-789. |
dc.identifier.issn | 0048-9697 |
dc.identifier.uri | http://hdl.handle.net/2117/116760 |
dc.description.abstract | The use of low-cost inorganic sorbents as a new sustainable strategy to enhance the valorization of nutrients (N-P-K), from the urban water cycle (e.g., side streams from sewage sludge anaerobic digestion), in agriculture applications is presented. The simultaneous recovery and stabilization of ammonium and phosphate by using a mixture of two reactive sorbents (Na and K zeolites and magnesium oxide) was evaluated. The nutrients stabilization process, favoured at alkaline pH values, is carried out by a) the precipitation of phosphate ions with magnesium and/or ammonium ions and b) the sorption of ammonium by Na- and K-zeolites. MgO(s) promoted the stabilization of phosphate as bobierrite (Mg3(PO4)2(s)) or struvite (MgNH4PO4(s)) depending on the applied dose. Doses with the stoichiometric molar ratio of Mg/P promote the formation of bobierrite, while molar ratios higher than 3 favour the formation of struvite. Na zeolites (NaP1-NA, NaP1-IQE) demonstrated efficiency on ammonium stabilization between 60 ± 2 (for 15 gZ/L) to 90 ± 3% (for 50 gZ/L). The ammonium recovery efficiency is limited by the zeolite sorption capacity. If the target of the fertilizing criteria should include K, then the use of a K-zeolite (e.g., 5AH-IQE) provides a good solution. The optimum pH for the precipitation of struvite and bobierrite is 9.5 and the optimum pH for ammonium removal is between 4 and 8.5. N is present in higher concentrations (up 0.7–1 g NH4+/L) when pH is ranged between 8.2 and 8.6. The ammonium recovery ratios were better than those previously reported using only magnesium oxide or even a more expensive reagent as newberrite (MgHPO4(s)). The recovery mechanisms described generate low-solubility stabilized nutrients forms that potentially can be applied as slow-release fertilizers in agriculture. Thus, the use in agriculture of blends of digested sludge with low-solubility stabilized nutrients forms will improve soils quality properties in terms of organic matter and nutrients availability. |
dc.format.extent | 9 p. |
dc.language.iso | eng |
dc.publisher | Elsevier |
dc.subject | Àrees temàtiques de la UPC::Enginyeria química |
dc.subject.lcsh | Magnesium oxide |
dc.subject.lcsh | Sewage sludge--Analysis |
dc.title | Simultaneous ammonium and phosphate recovery and stabilization from urban sewage sludge anaerobic digestates using reactive sorbents |
dc.type | Article |
dc.subject.lemac | Fangs obtinguts per depuració |
dc.subject.lemac | Òxid de magnesi |
dc.contributor.group | Universitat Politècnica de Catalunya. R2EM - Resource Recovery and Environmental Management |
dc.identifier.doi | 10.1016/j.scitotenv.2018.02.243 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0048969718306429?via%3Dihub |
dc.rights.access | Open Access |
local.identifier.drac | 22028667 |
dc.description.version | Postprint (author's final draft) |
local.citation.author | Hermassi, M.; Dosta, J.; Valderrama, C.; Licon, E.; Moreno Palmerola, Natàlia; Querol, X.; Batis, N.; Cortina, J. |
local.citation.publicationName | Science of the total environment |
local.citation.volume | 630 |
local.citation.startingPage | 781 |
local.citation.endingPage | 789 |
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