Sequential electrodialytic recovery of phosphorus from low-temperature gasification ashes of chemically precipitated sewage sludge

Bidragets oversatte titel: Sequential electrodialytic recovery of phosphorus from low-temperature gasification ashes of chemically precipitated sewage sludge

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

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Phosphorus recycling from secondary materials like sewage sludge ashes offers an interesting alternative to imported mineral phosphates. However, a separation of P from the bulk ash is normally required, due to its low plant availability and the presence of heavy metals. More than 80% of P was recovered from incineration sewage sludge ashes in the past using a two-compartment electrodialytic cell. In contrast, the recovery was below 30% for ashes from low-temperature gasification using the same setup, due to the high presence of Al- and Fe(III)-P bindings. In the present study, an electrodialytic process combining sequentially a pair of two-compartment cells allowed a recovery of up to 70% of phosphorus from these ashes. The use of a second cell, where the ashes were treated in an alkaline pH, allowed the P solubilisation from aluminium and ferric phosphates and its separation from most metals as they became insoluble. Furthermore, the ratio of Al, Fe, Mg and most heavy metals to P was comparable to wet process phosphoric acid. Therefore, this sequential process was found to be suitable to recycle P and potentially use it in the production of common fertilizers like diammonium phosphate.
OriginalsprogEngelsk
TidsskriftWaste Management
Vol/bind60
Sider (fra-til)211-218
Antal sider7
ISSN0956-053X
DOI
StatusUdgivet - 2017

Emneord

  • Electrodialysis
  • Heavy metals
  • iron phosphates
  • Low-temperature gasification
  • phosphorous
  • Sewage sludge ash

Citer dette

Parés Viader, Raimon ; Erland Jensen, Pernille ; Ottosen, Lisbeth M. ; Ahrenfeldt, Jesper ; Hauggaard-Nielsen, Henrik. / Sequential electrodialytic recovery of phosphorus from low-temperature gasification ashes of chemically precipitated sewage sludge. I: Waste Management. 2017 ; Bind 60. s. 211-218.
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title = "Sequential electrodialytic recovery of phosphorus from low-temperature gasification ashes of chemically precipitated sewage sludge",
abstract = "Phosphorus recycling from secondary materials like sewage sludge ashes offers an interesting alternative to imported mineral phosphates. However, a separation of P from the bulk ash is normally required, due to its low plant availability and the presence of heavy metals. More than 80{\%} of P was recovered from incineration sewage sludge ashes in the past using a two-compartment electrodialytic cell. In contrast, the recovery was below 30{\%} for ashes from low-temperature gasification using the same setup, due to the high presence of Al- and Fe(III)-P bindings. In the present study, an electrodialytic process combining sequentially a pair of two-compartment cells allowed a recovery of up to 70{\%} of phosphorus from these ashes. The use of a second cell, where the ashes were treated in an alkaline pH, allowed the P solubilisation from aluminium and ferric phosphates and its separation from most metals as they became insoluble. Furthermore, the ratio of Al, Fe, Mg and most heavy metals to P was comparable to wet process phosphoric acid. Therefore, this sequential process was found to be suitable to recycle P and potentially use it in the production of common fertilizers like diammonium phosphate.",
keywords = "Electrodialysis, Heavy metals, Low-temperature gasification, phosphorous, Sewage sludge ash, Electrodialysis, Heavy metals, iron phosphates, Low-temperature gasification, phosphorous, Sewage sludge ash",
author = "{Par{\'e}s Viader}, Raimon and {Erland Jensen}, Pernille and Ottosen, {Lisbeth M.} and Jesper Ahrenfeldt and Henrik Hauggaard-Nielsen",
year = "2017",
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Sequential electrodialytic recovery of phosphorus from low-temperature gasification ashes of chemically precipitated sewage sludge. / Parés Viader, Raimon; Erland Jensen, Pernille; Ottosen, Lisbeth M.; Ahrenfeldt, Jesper; Hauggaard-Nielsen, Henrik.

I: Waste Management, Bind 60, 2017, s. 211-218.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Sequential electrodialytic recovery of phosphorus from low-temperature gasification ashes of chemically precipitated sewage sludge

AU - Parés Viader, Raimon

AU - Erland Jensen, Pernille

AU - Ottosen, Lisbeth M.

AU - Ahrenfeldt, Jesper

AU - Hauggaard-Nielsen, Henrik

PY - 2017

Y1 - 2017

N2 - Phosphorus recycling from secondary materials like sewage sludge ashes offers an interesting alternative to imported mineral phosphates. However, a separation of P from the bulk ash is normally required, due to its low plant availability and the presence of heavy metals. More than 80% of P was recovered from incineration sewage sludge ashes in the past using a two-compartment electrodialytic cell. In contrast, the recovery was below 30% for ashes from low-temperature gasification using the same setup, due to the high presence of Al- and Fe(III)-P bindings. In the present study, an electrodialytic process combining sequentially a pair of two-compartment cells allowed a recovery of up to 70% of phosphorus from these ashes. The use of a second cell, where the ashes were treated in an alkaline pH, allowed the P solubilisation from aluminium and ferric phosphates and its separation from most metals as they became insoluble. Furthermore, the ratio of Al, Fe, Mg and most heavy metals to P was comparable to wet process phosphoric acid. Therefore, this sequential process was found to be suitable to recycle P and potentially use it in the production of common fertilizers like diammonium phosphate.

AB - Phosphorus recycling from secondary materials like sewage sludge ashes offers an interesting alternative to imported mineral phosphates. However, a separation of P from the bulk ash is normally required, due to its low plant availability and the presence of heavy metals. More than 80% of P was recovered from incineration sewage sludge ashes in the past using a two-compartment electrodialytic cell. In contrast, the recovery was below 30% for ashes from low-temperature gasification using the same setup, due to the high presence of Al- and Fe(III)-P bindings. In the present study, an electrodialytic process combining sequentially a pair of two-compartment cells allowed a recovery of up to 70% of phosphorus from these ashes. The use of a second cell, where the ashes were treated in an alkaline pH, allowed the P solubilisation from aluminium and ferric phosphates and its separation from most metals as they became insoluble. Furthermore, the ratio of Al, Fe, Mg and most heavy metals to P was comparable to wet process phosphoric acid. Therefore, this sequential process was found to be suitable to recycle P and potentially use it in the production of common fertilizers like diammonium phosphate.

KW - Electrodialysis

KW - Heavy metals

KW - Low-temperature gasification

KW - phosphorous

KW - Sewage sludge ash

KW - Electrodialysis

KW - Heavy metals

KW - iron phosphates

KW - Low-temperature gasification

KW - phosphorous

KW - Sewage sludge ash

U2 - 10.1016/j.wasman.2016.11.030

DO - 10.1016/j.wasman.2016.11.030

M3 - Journal article

VL - 60

SP - 211

EP - 218

JO - Waste Management

JF - Waste Management

SN - 0956-053X

ER -