Electrodialytic extraction of phosphorus from ash of low-temperature gasification of sewage sludge

Bidragets oversatte titel: Elektrolytisk ekstraktion af fosfor fra lav-temperatur forgasningsaske produceret på spildevandsslam

Raimon Parés Viader, Pernille Erland Jensen, Lisbeth M. Ottosen, Jesper Ahrenfeldt, Henrik Hauggaard-Nielsen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

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
OriginalsprogEngelsk
TidsskriftElectrochimica Acta
Vol/bind181
Sider (fra-til)100-108
ISSN0013-4686
DOI
StatusUdgivet - 2015

Emneord

  • Fosfor
  • Spildevandsslam
  • Lav-temperatur forgasning
  • Tungmetaller
  • Elektrolyse

Citer dette

Viader, Raimon Parés ; Jensen, Pernille Erland ; Ottosen, Lisbeth M. ; Ahrenfeldt, Jesper ; Hauggaard-Nielsen, Henrik. / Electrodialytic extraction of phosphorus from ash of low-temperature gasification of sewage sludge. I: Electrochimica Acta. 2015 ; Bind 181. s. 100-108.
@article{df1ca65380024dd2bfb6a0b147244b25,
title = "Electrodialytic extraction of phosphorus from ash of low-temperature gasification of sewage sludge",
abstract = "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",
keywords = "Fosfor, Spildevandsslam, Lav-temperatur forgasning, Tungmetaller, Elektrolyse, Phosphorus, Low-temperature gasification, Sewage sludge ash, Electrodialysis, Heavy metals",
author = "Viader, {Raimon Par{\'e}s} and Jensen, {Pernille Erland} and Ottosen, {Lisbeth M.} and Jesper Ahrenfeldt and Henrik Hauggaard-Nielsen",
year = "2015",
doi = "10.1016/j.electacta.2015.05.025",
language = "English",
volume = "181",
pages = "100--108",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Pergamon Press",

}

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 tidsskriftTidsskriftartikelForskningpeer 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 -