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
Sustainable use of crushed autoclaved aerated concrete (CAAC) as a filter medium in wastewater purification
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Environmental Geochemistry and Ecotechnology.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering, Environmental Geochemistry and Ecotechnology.
2012 (English)In: 8th International conference on sustainable management of waste and recycled materials in construction, Gothenburg, Sweden, 30 May โ€“ 1 June, 2012. Proceedings / [ed] M. Arm, C.Vandecasteele, J.Heynen, P. Suer & B. Lind, ISCOWA and SGI , 2012Conference paper, Published paper (Other academic)
Abstract [en]

Scrap material from the production of autoclaved aerated concrete (AAC) should be considered a valuable by-product and not a waste, as should residues from the demolition of houses built with AAC. This paper presents an innovative use of AAC that can contribute to environmental improvement. We tested crushed AAC (CAAC, 2-4 mm) for its phosphorus (P) removal efficiency by filtering a solution containing phosphate phosphorus (PO4-P) or pure wastewater in batch, bench-scale and field pilot-scale experiments. Slow phosphate removal kinetics of CAAC were demonstrated, but the removal efficiency was very high (93-99%). Mineralogical analyses (by ICP-OES) of the solid CAAC after contact with flowing wastewater yielded concentrations of 39.6 g P kg-1. Application of X-ray powder diffraction (XRPD) for mineral phase identification confirmed that the dominant mineral in AAC was tobermorite (Ca5Si6O16(OH)2 ยท 4H2O). Dissolution of this crystalline structure was followed by formation of calcium phosphates and the porous, tobermorite-rich material produced proved excellent in removal of P and organic matter from domestic wastewater. Only crushing and sieving to achieve a suitable particle size distribution is needed prior to application in different technical solutions.

Place, publisher, year, edition, pages
ISCOWA and SGI , 2012.
Keyword [en]
By-product, calcium phosphate, phosphorus removal, tobermorite
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-103423OAI: oai:DiVA.org:kth-103423DiVA: diva2:560089
Conference
8th International conference on sustainable management of waste and recycled materials in construction, Gothenburg, Sweden, 30 May โ€“ 1 June, 2012
Note

QC 20121016

Available from: 2012-10-16 Created: 2012-10-11 Last updated: 2012-10-16Bibliographically approved

Open Access in DiVA

fulltext(462 kB)486 downloads
File information
File name FULLTEXT01.pdfFile size 462 kBChecksum SHA-512
690d5122913f50f7ad654018cf1fb4419a8bc8118b9b00ffda00eef3f5caf3c9735206cde0502e642b3c40d8977f4fcef0a4d7b24a863a903e3197f7dcc74408
Type fulltextMimetype application/pdf

Other links

Conference website

Search in DiVA

By author/editor
Renman, GunnoRenman, Agnieszka
By organisation
Environmental Geochemistry and Ecotechnology
Water Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 486 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 390 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