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Membranbioreaktorteknik- en framtida lösning på Lundåkraverket?: Membrane bioreactors- A future solution at Lundåkra wastewater treatment plant?
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Institutionen för Kemiteknik, Department of Chemical Engineering, Lund University.
2014 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Membrane bioreactors (MBR) combined with biological phosphorous treatment (Bio-P) has been investigated if that could be an alternative to the future expansion with conventional active sludge treatment at Lundåkra wastewater treatment plant (WWTP) in the proximity of Landskrona, Sweden.The results showed that the surface demand in the biological treatment will be reduced with 67% with the MBR-alternative compared to a conventional activated sludge process. The nutrient removal in the MBR-solution was decreased or unchanged for nitrogen-, phosphorous- and organic parameters. However, the energy demand will increase with an estimated cost of approximately 1 million SEK annually. Moreover, the extra chemical consumption is estimated to cost 370 000 SEK annually.The disturbances caused by filamentous bacteria such as sludge dispersal could be resolved with MBR-technology because the membranes are not affected by these organisms. The Bio-P process combined with MBR-technology works if the wastewater recirculates from the membranes to an aerobic zone.In the proposal, there will be a new pre-treatment step, for instance hole screens. In addition, there will be an introduction of chemical precipitation in the biological treatment, use the present post-precipitation basin with lamella sedimentation as an overflow wastewater treatment and transform one of the clarifiers into a side stream hydrolysis. The new MBR-design will consist of a new basin built between the clarifiers and the lamella sedimentation building. An extended study of the MBR-alternative with respect to sludge treatment and hydraulics is required before it can be shown if that is a better solution than a conventional activated sludge process.

Place, publisher, year, edition, pages
2014.
Series
UPTEC W, ISSN 1401-5765 ; 14004
Keyword [sv]
MBR, Bio-P, Filamentbildande bakterier, Biologiskt reningssteg
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-220196OAI: oai:DiVA.org:uu-220196DiVA: diva2:704402
External cooperation
Sweco Environment
Educational program
Master Programme in Environmental and Water Engineering
Presentation
2014-02-04, Skåne, Geocentrum, Villavägen 16, Uppsala, 10:19 (Swedish)
Supervisors
Examiners
Available from: 2014-07-01 Created: 2014-03-12 Last updated: 2014-07-01Bibliographically approved

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