Resumé
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Electrochimica Acta |
| Vol/bind | 181 |
| Sider (fra-til) | 100-108 |
| ISSN | 0013-4686 |
| DOI | |
| Status | Udgivet - 2015 |
Emneord
- Fosfor
- Spildevandsslam
- Lav-temperatur forgasning
- Tungmetaller
- Elektrolyse
Citer dette
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Electrodialytic extraction of phosphorus from ash of low-temperature gasification of sewage sludge. / Viader, Raimon Parés; Jensen, Pernille Erland; Ottosen, Lisbeth M.; Ahrenfeldt, Jesper; Hauggaard-Nielsen, Henrik.
I: Electrochimica Acta, Bind 181, 2015, s. 100-108.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
TY - JOUR
T1 - Electrodialytic extraction of phosphorus from ash of low-temperature gasification of sewage sludge
AU - Viader, Raimon Parés
AU - Jensen, Pernille Erland
AU - Ottosen, Lisbeth M.
AU - Ahrenfeldt, Jesper
AU - Hauggaard-Nielsen, Henrik
PY - 2015
Y1 - 2015
N2 - Low-temperature gasification allows the production of energy from biomass with high contents of low melting point compounds, like sewage sludge, and the recycling of the nutrients as P from the resulting ashes as renewable fertiliser. Major drawbacks are, however, the presence of heavy metals and the low plant-availability of Al- and Fe- phosphate compounds in the gasification ashes. In the present research, the feasibility of a 2-compartment electrodialytic (ED) setup for P separation from Al, Fe and heavy metals in two different low-temperature gasification ashes was investigated. One ash was from gasification of sewage sludge where P was precipitated with Fe and Al salts, from which it was possible to extract up to 26% of the P. The other ash was from co-gasification of a mixture of biologically precipitated sewage sludge and wheat straw pellets. More promising results were obtained with this ash, as up to 90% of the P was extracted from the ashes. For both ashes, P was extracted by ED in acidic aqueous solutions with ratios of Fe, Al and each heavy metal to P considerably below the values found in the initial ashes. Therefore, the 2-compartment ED cell technology was proved as possible method to separate Al, Fe and heavy metals from P for low-temperature gasification ashes
AB - Low-temperature gasification allows the production of energy from biomass with high contents of low melting point compounds, like sewage sludge, and the recycling of the nutrients as P from the resulting ashes as renewable fertiliser. Major drawbacks are, however, the presence of heavy metals and the low plant-availability of Al- and Fe- phosphate compounds in the gasification ashes. In the present research, the feasibility of a 2-compartment electrodialytic (ED) setup for P separation from Al, Fe and heavy metals in two different low-temperature gasification ashes was investigated. One ash was from gasification of sewage sludge where P was precipitated with Fe and Al salts, from which it was possible to extract up to 26% of the P. The other ash was from co-gasification of a mixture of biologically precipitated sewage sludge and wheat straw pellets. More promising results were obtained with this ash, as up to 90% of the P was extracted from the ashes. For both ashes, P was extracted by ED in acidic aqueous solutions with ratios of Fe, Al and each heavy metal to P considerably below the values found in the initial ashes. Therefore, the 2-compartment ED cell technology was proved as possible method to separate Al, Fe and heavy metals from P for low-temperature gasification ashes
KW - Fosfor
KW - Spildevandsslam
KW - Lav-temperatur forgasning
KW - Tungmetaller
KW - Elektrolyse
KW - Phosphorus
KW - Low-temperature gasification
KW - Sewage sludge ash
KW - Electrodialysis
KW - Heavy metals
U2 - 10.1016/j.electacta.2015.05.025
DO - 10.1016/j.electacta.2015.05.025
M3 - Journal article
VL - 181
SP - 100
EP - 108
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -