Phosphorus recovery from sewage sludge char ash

M. Atienza-Martinez, G. Gea, J. Arauzo, Sascha R.A. Kersten, A.M.J. Kootstra

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Phosphorus was recovered from the ash obtained after combustion at different temperatures (600 °C, 750 °C and 900 °C) and after gasification (at 820 °C using a mixture of air and steam as fluidising agent) of char from sewage sludge fast pyrolysis carried out at 530 °C. Depending on the leaching conditions (extraction time, acid load and acid concentration, and type of acid) 90% mass of the original P was recovered. Regarding char combustion ash, higher phosphorus yields are obtained from ash obtained at 900 °C than at 600 °C and 750 °C when using sulphuric acid. Combustion temperature does not affect phosphorus leaching with oxalic acid. A contact time of 2 h and an oxalic acid load of 10 kg kg−1 of P seem sufficient for phosphorus extraction. Almost all phosphorus present in gasification ash is leached after 2 h with both sulphuric and oxalic acid using an acid load of 14 kg kg−1 of P. Char ash is a possible renewable source of phosphorus and it can be an alternative to rock phosphate in fertilizer production. The combination of sewage sludge pyrolysis, combustion or gasification of the char and phosphorus extraction from the final solid residue contributes to the integral exploitation of sewage sludge.
Original languageEnglish
Pages (from-to)42-50
Number of pages9
JournalBiomass & bioenergy
Volume65
DOIs
Publication statusPublished - 2014

Fingerprint

Ashes
Sewage sludge
sewage sludge
Phosphorus
ash
phosphorus
Recovery
combustion
gasification
Oxalic acid
oxalic acid
Gasification
Acids
acids
acid
pyrolysis
sulfuric acid
Leaching
leaching
Pyrolysis

Keywords

  • IR-94924
  • METIS-305362

Cite this

Atienza-Martinez, M. ; Gea, G. ; Arauzo, J. ; Kersten, Sascha R.A. ; Kootstra, A.M.J. / Phosphorus recovery from sewage sludge char ash. In: Biomass & bioenergy. 2014 ; Vol. 65. pp. 42-50.
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abstract = "Phosphorus was recovered from the ash obtained after combustion at different temperatures (600 °C, 750 °C and 900 °C) and after gasification (at 820 °C using a mixture of air and steam as fluidising agent) of char from sewage sludge fast pyrolysis carried out at 530 °C. Depending on the leaching conditions (extraction time, acid load and acid concentration, and type of acid) 90{\%} mass of the original P was recovered. Regarding char combustion ash, higher phosphorus yields are obtained from ash obtained at 900 °C than at 600 °C and 750 °C when using sulphuric acid. Combustion temperature does not affect phosphorus leaching with oxalic acid. A contact time of 2 h and an oxalic acid load of 10 kg kg−1 of P seem sufficient for phosphorus extraction. Almost all phosphorus present in gasification ash is leached after 2 h with both sulphuric and oxalic acid using an acid load of 14 kg kg−1 of P. Char ash is a possible renewable source of phosphorus and it can be an alternative to rock phosphate in fertilizer production. The combination of sewage sludge pyrolysis, combustion or gasification of the char and phosphorus extraction from the final solid residue contributes to the integral exploitation of sewage sludge.",
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Atienza-Martinez, M, Gea, G, Arauzo, J, Kersten, SRA & Kootstra, AMJ 2014, 'Phosphorus recovery from sewage sludge char ash' Biomass & bioenergy, vol. 65, pp. 42-50. https://doi.org/10.1016/j.biombioe.2014.03.058

Phosphorus recovery from sewage sludge char ash. / Atienza-Martinez, M.; Gea, G.; Arauzo, J.; Kersten, Sascha R.A.; Kootstra, A.M.J.

In: Biomass & bioenergy, Vol. 65, 2014, p. 42-50.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Phosphorus recovery from sewage sludge char ash

AU - Atienza-Martinez, M.

AU - Gea, G.

AU - Arauzo, J.

AU - Kersten, Sascha R.A.

AU - Kootstra, A.M.J.

PY - 2014

Y1 - 2014

N2 - Phosphorus was recovered from the ash obtained after combustion at different temperatures (600 °C, 750 °C and 900 °C) and after gasification (at 820 °C using a mixture of air and steam as fluidising agent) of char from sewage sludge fast pyrolysis carried out at 530 °C. Depending on the leaching conditions (extraction time, acid load and acid concentration, and type of acid) 90% mass of the original P was recovered. Regarding char combustion ash, higher phosphorus yields are obtained from ash obtained at 900 °C than at 600 °C and 750 °C when using sulphuric acid. Combustion temperature does not affect phosphorus leaching with oxalic acid. A contact time of 2 h and an oxalic acid load of 10 kg kg−1 of P seem sufficient for phosphorus extraction. Almost all phosphorus present in gasification ash is leached after 2 h with both sulphuric and oxalic acid using an acid load of 14 kg kg−1 of P. Char ash is a possible renewable source of phosphorus and it can be an alternative to rock phosphate in fertilizer production. The combination of sewage sludge pyrolysis, combustion or gasification of the char and phosphorus extraction from the final solid residue contributes to the integral exploitation of sewage sludge.

AB - Phosphorus was recovered from the ash obtained after combustion at different temperatures (600 °C, 750 °C and 900 °C) and after gasification (at 820 °C using a mixture of air and steam as fluidising agent) of char from sewage sludge fast pyrolysis carried out at 530 °C. Depending on the leaching conditions (extraction time, acid load and acid concentration, and type of acid) 90% mass of the original P was recovered. Regarding char combustion ash, higher phosphorus yields are obtained from ash obtained at 900 °C than at 600 °C and 750 °C when using sulphuric acid. Combustion temperature does not affect phosphorus leaching with oxalic acid. A contact time of 2 h and an oxalic acid load of 10 kg kg−1 of P seem sufficient for phosphorus extraction. Almost all phosphorus present in gasification ash is leached after 2 h with both sulphuric and oxalic acid using an acid load of 14 kg kg−1 of P. Char ash is a possible renewable source of phosphorus and it can be an alternative to rock phosphate in fertilizer production. The combination of sewage sludge pyrolysis, combustion or gasification of the char and phosphorus extraction from the final solid residue contributes to the integral exploitation of sewage sludge.

KW - IR-94924

KW - METIS-305362

U2 - 10.1016/j.biombioe.2014.03.058

DO - 10.1016/j.biombioe.2014.03.058

M3 - Article

VL - 65

SP - 42

EP - 50

JO - Biomass & bioenergy

JF - Biomass & bioenergy

SN - 0961-9534

ER -