Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Phosphorus recovery from sewage sludge: Ideas for further studies to improve leaching
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Water, Sewage and Waste technology.ORCID iD: 0000-0002-6786-0342
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Water, Sewage and Waste technology.
2007 (English)In: Integration and optimisation of urban sanitation systems: Proceedings of Polish-Swedish seminars / [ed] E. Plaza, E. Levlin, 2007, 61-70 p.Conference paper, Published paper (Other academic)
Abstract [en]

Development of methods to recover phosphorus will make handling of sewage sludge moresustainable. In earlier studies sludge incineration ash and SCWO-residues have been leached withacid and base. Acid leaching gives a high degree of recovery but releases besides phosphate alsothe main part of other metals (including heavy metals). This gives a large separation problem andgives a complicated process technology. Leaching with base (NaOH) gives a lower degree ofrecovery (up to about 50 %) however with less dissolution of metals. When leaching with base, thecalcium content in the sludge probably binds phosphorus as calcium phosphate.To improve leaching different possibilities can be studied such as use of a two-step leachingprocess. In a first step acid leaching dissolves calcium and magnesium. Treating the leachate withsulphuric acid, calcium sulphate (gypsum) is precipitated and phosphoric acid is obtained.Remaining ash or SCWO-residual product can afterwards be treated by alkaline leaching. Anotheralternative is to study leaching at anaerobic conditions. Since ferrous iron(II) phosphate is moresoluble than ferric iron(III) phosphate the phosphate is more easily dissolved and the heavy metalcontamination will be lower.

Place, publisher, year, edition, pages
2007. 61-70 p.
Series
Joint Polish - Swedish reports, ISSN 1650-8610 ; 12
Keyword [en]
Acid, Base, Leaching, Phosphorus recovery, Sewage sludge
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-87222ISBN: 978-91-7178-825-2 (print)OAI: oai:DiVA.org:kth-87222DiVA: diva2:501525
Conference
Polish-Swedish seminars, Stockholm, Sweden, June 6-8, 2004
Note
QC 20120516Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2012-05-16Bibliographically approved

Open Access in DiVA

No full text

Other links

http://www2.lwr.kth.se/Forskningsprojekt/Polishproject/rep12/Pfurtherecovery.pdf

Search in DiVA

By author/editor
Levlin, ErikHultman, Bengt
By organisation
Water, Sewage and Waste technology
Water Engineering

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 127 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf