Upgrading the Sjölunda WWTP according to a novel process concept

The Sjölunda wastewater treatment plant in Malmö, Sweden, was upgraded for extended nutrient removal in 1998-1999. The design was based on future effluent standards of 10 mg BOD7/l, 0.3 mg total-P/l and 8 mg total-N/l. The upgrading concept took into consideration existing processes and structures,...

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Bibliographic Details
Published in:Water science and technology 2003-01, Vol.47 (12), p.1-7
Main Authors: MANNER, N, ASPEGREN, H, NYBERG, U, ANDERSSON, B
Format: Article
Language:English
Subjects:
Ammonia
Applied sciences
Batch reactors
Bed load
Biofilms
Bioreactors
Carbon sources
Denitrification
Design standards
Dosage
Effluent standards
Effluents
Exact sciences and technology
Filters
Filtration
General purification processes
Guideline Adherence
Mineral nutrients
Nitrification
Nitrogen - isolation & purification
Nitrogen - metabolism
Nutrient removal
Phosphorus
Pollution
Reactors
Removal
Sweden
Trickling filters
Upgrading
Waste Disposal, Fluid
Wastewater
Wastewater treatment
Wastewater treatment plants
Wastewaters
Water Purification
Water quality standards
Water treatment and pollution
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Summary:The Sjölunda wastewater treatment plant in Malmö, Sweden, was upgraded for extended nutrient removal in 1998-1999. The design was based on future effluent standards of 10 mg BOD7/l, 0.3 mg total-P/l and 8 mg total-N/l. The upgrading concept took into consideration existing processes and structures, resulting in a cost-effective and compact upgrading. To introduce nitrification, the existing trickling filters for BOD-removal were converted to a nitrifying mode. A sequencing batch reactor for nitrification of supernatant was necessary to control the ammonia load. Denitrification was accomplished in a moving bed biofilm reactor with addition of external carbon source. The future effluent standards could be met by the upgraded plant. The trickling filters were stable despite varying loading conditions. High rates and low effluent ammonia concentrations were achieved. Essential features for stable post denitrification were control strategies for carbon source dosage and avoiding phosphorus limitation.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2003.0621