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Chemical requirements for phosphorus release from sewage sludge treated with supercritical water oxidation
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
2005 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448Article in journal (Other academic) Submitted
Place, publisher, year, edition, pages
2005.
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:kth:diva-5888OAI: oai:DiVA.org:kth-5888DiVA: diva2:10416
Note
QS 20120316Available from: 2005-09-02 Created: 2005-09-02 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Phosphorus release and recovery from treated sewage sludge
Open this publication in new window or tab >>Phosphorus release and recovery from treated sewage sludge
2005 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

In working towards a sustainable society, recycling and recovery of products together with handling of scarce resources must be considered. The growing quantities of sludge from wastewater treatment plants and the increasingly stringent restrictions on landfilling and on agricultural use of sludge are promoting other disposal alternatives. Sludge fractionation, providing sludge volume reduction, product recovery and separation of toxic substances into a small stream, has gained particular interest. In this thesis, the potential for phosphate release and recovery from treated sewage sludge is investigated as an alternative for agricultural use in urban areas. Leaching and recovery experiments were performed on sludge residue from supercritical water oxidation, ash from incineration and dried sludge at different temperatures.

Results showed that acid or alkaline leaching is a promising method to release phosphate from sewage sludge treated with supercritical water oxidation, incineration, or drying at 300°C. The leaching is affected by a number of factors, including how the sludge residue has been produced, the origin of the sludge residue, the quantity of chemicals added and the presence of ions in the leachate.

The implementation of any particular sludge treatment technology would depend on cost, environmental regulations, and social aspects. The results of this thesis may be beneficial for minimizing the use and cost of chemicals, and give increased knowledge for further development of technology for phosphate recovery.

Place, publisher, year, edition, pages
Stockholm: KTH, 2005. xvi, 31 p.
Series
Trita-LWR. PHD, ISSN 1650-8602 ; 1024
Keyword
Ash; Phosphorus release; Phosphorus recovery; Sludge fractionation; Supercritical water oxidation; Sustainable sludge handling.
National Category
Water Engineering
Identifiers
urn:nbn:se:kth:diva-402 (URN)91-7178-123-4 (ISBN)
Public defence
2005-09-14, Q2, Osquldas väg 10, 1 tr ned, Stockholm, 13:30
Opponent
Supervisors
Note
QC 20100930Available from: 2005-09-02 Created: 2005-09-02 Last updated: 2010-09-30Bibliographically approved

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