Change search
ReferencesLink to record
Permanent link

Direct link
Fosforåtervinning från avloppsrening med sidoströmshydrolys
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Water, Sewage and Waste technology.
2016 (Swedish)Report (Other academic)
Abstract [sv]

Fosfor kan utvinnas från sidoströmshydrolys i reningsverk med biologisk fosforavskiljning. Lösligt fosfat frigörs vid hydrolys av returslam som är anaerob behandling där kolkälla framställs av slammet. Olika varianter för återvinnning från sidoström är t.ex. PhoStrip-processen, där fosfor utvinns från returslammet av fosforrikt slam från aktivslamprocesser med biologisk fosforreduktion. Ett annat alternativ är att återvinna fosfor från en sidoström som tas ut från den anaeroba delen av aktivslamprocessen, där fosfor har frigjorts till lösningen. Fosforåtervinning från fosforrik partiell sidoström beräknas ge en fosforåtervinning på 60-65%. Försök har utförts med slam från sidoströmshydrolys vid en process med biologisk fosforavskiljning. Efter separation av vattenfasen fälldes fosforn dels med magnesium och dels med kalcium vilket gav en utfällning av fosfor på 79 – 100 %. Vid fällning med magnesium bildades struvit (MgNH4PO4), och med kalcium kalciumfosfat (Ca10(OH)2(PO4)6). Analys av slam före (100 mg P/l) och efter slamhydrolysen visar att 20 % fosfor 20 mg P/l frigörs till vattenfasen. 124 ton fosfor i inkommande avlopp och 20 % frigöring av fosfor vid slamhydrolysen borde ge en fosforåtervinningspotential på 25 ton. Dock, med ett flöde av 54 m3/h genom slamhydrolysen blir fosforåtervinningspotential 9,5 ton per år.

Abstract [en]

Phosphorus can be extracted from side stream hydrolysis in treatment plants with biological phosphorus removal. Soluble phosphate released during the hydrolysis of return sludge is anaerobic treatment where the carbon source is produced from sludge. Different variants for recycling, from the side stream, for example, PhoStrip process in which phosphorus is recovered from the return sludge of phosphorus rich sludge from the activated sludge processes with biological phosphorus removal. Another alternative is to recover phosphorus from a side stream withdrawn from the anaerobic active sludge process, where phosphorus is released to the solution. Phosphorus recovery from phosphorous partial side stream is expected to give a phosphorus recovery of 60-65%. Experiments have been carried out with sludge from side stream hydrolysis at a process with biological phosphorus removal. After separation of the aqueous phase phosphorous was precipitated with both magnesium and calcium, which gave a precipitation of phosphorus at 79 to 100%. At precipitation with magnesium struvite (MgNH4PO4) was formed and calcium phosphate (Ca 10 (OH)2(PO4)6) with calcium. Analysis of the sludge before (100 mg P/l) and the sludge after the hydrolysis shows that 20% phosphorus 20 mg P/l is released to the water phase. With 124 tons per year phosphorus in the incoming sewage and a release of 20 % be in the sludge hydrolysis, the phosphorus recovery potential should be 25 tons per year. However, with a flow of 54 m3/h through the sludge hydrolysis is phosphorus recovery potential will be 9.5 tons per year.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. , 11 p.
TRITA-LWR Report, ISSN 1650-8610 ; 2016:01
National Category
Water Engineering
URN: urn:nbn:se:kth:diva-193574ISBN: 978-91-7729-152-7OAI: diva2:1020878

QC 20161007

Available from: 2016-10-04 Created: 2016-10-04 Last updated: 2016-10-07Bibliographically approved

Open Access in DiVA

fulltext(939 kB)8 downloads
File information
File name FULLTEXT01.pdfFile size 939 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Levlin, ErikPlaza, Elzbieta
By organisation
Land and Water Resources EngineeringWater, Sewage and Waste technology
Water Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 8 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

ReferencesLink to record
Permanent link

Direct link