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Slamhantering från reningsverk: Ett utmanande problem
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
2023 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Sustainable development
SDG 16: Promote peaceful and inclusive societies for sustainable development, provide access to justice for all and build effective, accountable and inclusive institutions at all levels
Abstract [sv]

Vid vattenrening produceras slam som restprodukt. Slam innehåller en stor mängd ämnen, såsom metaller, medicinrester och olika näringsämnen. I Sverige produceras flera hundra tusen ton årligen. Innehållet måste hanteras, men hur görs det idag och hur kommer det att hanteras i framtiden. Vanligast idag är att återvinna fosfor och kväve genom att sprida slam som gödning inom jord och skogsbruk. Däremot metaller som finns i slam utvinns inte idag, även om det vore värdefullt ur miljösynpunkt. 

Denna litteraturstudie beskriver hur slamhantering ser ut idag, med fokus på Sverige. Därefter beskrivs forskningsläge och möjlig framtida utveckling i hantering. Slamhantering är problematisk ur flera aspekter. Slamhantering behöver hantera följande svårigheter:

En logistisk aspekt är de stora volymer som behöver hanteras och att de produceras på många olika platser.Forskning på konsekvenser av slamspridning är relativt liten. Det gäller den påverkan som medicinrester, tungmetaller och andra ämnen utgör.Vilka utvinningsbara ämnen ska prioriteras, eftersom metoder för utvinning ställer maximerad utvinning av gödning i motsats till maximerad utvinning av metaller. 

Abstract [en]

When purifying water, sludge is produced as a residual product. Sludge contains lots of different substances, such as metals, medical waste and different nutrients. In Sweden there is many hundred thousands of tons of sludge produced annually. The content must be managed, but how is it handled today and how will it be managed in the future. Commonly today phosphorus and nitrogen recycles by spreading sludge as fertiliser in agriculture and forestry. Metals in sludge is not recycled, even if it would be positive from an environmental point of view.

This literature study describes how sludge treatment is today with a focus in Sweden. Then it describes the current state of research and possible future development in management. Sludge handling is problematic from many different aspects. Sludge treatment must have to address these challanges:

One logistic aspect is that there are great volumes that needs to be handled and that it is produced in many different places.

The research in consequences of sludge spreading is a relatively small base. That goes for the influence of medical waste, heavy metals, and other substances in sludge. What recyclable substances needs to be prioritised, since the methods of extraction puts the maximal extraction of fertiliser against the maximised extractions of metals  

Place, publisher, year, edition, pages
2023. , p. 31
Keywords [en]
sewage. waste water, sewage sludge treatment
Keywords [sv]
Slamhantering, Avloppsslam, rening av slam, slaminnehåll, avloppsrening
National Category
Water Treatment
Identifiers
URN: urn:nbn:se:lnu:diva-121018OAI: oai:DiVA.org:lnu-121018DiVA, id: diva2:1760275
Subject / course
Miljö- och processteknik
Educational program
Operation and Maintenance Engineering, 180 credits
Supervisors
Examiners
Available from: 2023-05-31 Created: 2023-05-29 Last updated: 2023-05-31Bibliographically approved

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Slamhantering(413 kB)155 downloads
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File name FULLTEXT01.pdfFile size 413 kBChecksum SHA-512
bb31acb8a776753263740ba6f5c5453474403c5b4e2f35fbed230e70682894bead07404d1b2d6beb77d654f401adea2c9c91e84165360f2198d0895d927af424
Type fulltextMimetype application/pdf

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Kalmar Maritime Academy
Water Treatment

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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More styles
Language
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More languages
Output format
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