Annelie Hedström

About me

Annelie Hedström’s main scientific interests are related to the development of resource efficient, robust and sustainable systems for municipal and domestic wastewater management. Within the topics of sewers the research involves development of methods for condition assessment, pipe renewal and coordination with street renewal, inflow and infiltration in sewers as well as innovative systems such as vacuum piping and colocation with district heating.

Within the research area of resource-efficient and small-scale wastewater treatment systems, field studies are carried out to investigate the function of these on-site systems, including treatment of microplastics and micropollutants. Low-intensive, decentralised nature-based solutions for wastewater treatment are also studied. Source-separated sewage systems are evaluated with system analyses and in the laboratory processes are developed to concentrate black water for nutrient reuse. Processes and systems for greywater treatment and water reuse are also investigated.

Annelie is also involved in research related to advanced stormwater treatment components such as coagulation and flocculation processes, membrane filtration and zeolite filters. Annelie has also been involved in research projects related to the planning processes for implementation of more sustainable urban water system. Regularly, Annelie is involved in projects related to the evaluation of system solutions and development of decision support tools using multi-criteria methods.

Research Projects

• Stormwater&Sewers 2010- Opens in new window.
• Creaternity 2020- External link.
• ArcticSewlutions: Sewage management in cold and sparsely populated regions: solutions for the Arctic in view of a changing climate and emerging contaminants 2024-
• ProWater: The use of industrial side products as secondary resources in wastewater treatment 2024-
• Smart Sewers - Acoustic and vibration methods for condition assessment of sewer networks 2024-
• VA-NET: Vibration-based Assessment of municipal pipe networks 2023-
• AquaClim – Triplicate 2023-
• Sustainable URban FERtilizer – SURFER 2022- Opens in new window.
• Decentralised treatment and use for blue-green public spaces 2019-
• Drizzle 2017-
• Constructed wetlands for wastewater treatment: Adaptation to cold climate 2019- Opens in new window.

Completed projects

• Resource efficient and coordinated maintenance and renewal of horizontal water and road assets 2019-2023
• Area-efficient stormwater treatment - Where? When? How? (2016-2023)
• WAVE2 – Greywater Management for Water Re-Use (2021-2023)
• RECO-Resource efficient coordinated maintenance & renewal of streets, water and sewer pipes (2019-2022)
• ON-SITE Small-scale wastewater treatment systems (2019-2022)
• Experiences of LPS systems - A knowledge compilation (2021-2022)
• Wastewater flows in on-site wastewater treatment 2020-2021)
• Advanced Modular Treatment Trains for Urban Stormwater( to Protect the Receiving Waters (2017-2021)
• GreenNano (2013-2021)
• Small flexible sanitation solutions: adaptation to a changing world (2016-2020)
• Microorganisms in sand filters for wastewater treatment (2017-2018)
• Renovating aging sewers? Improving environment and health or waste of money? (2013-2017)
• Attract - Attractive and sustainable cities in cold climates (2011-2018)
• Discharge of bacteria from on-site wastewater treatment units (2015-2016)
• Phosphorus filters for on-site wastewater treatment – how long do they work? (2015-2016)
• Small-scale wastewater treatment systems: a comparative analysis (2014-2017)
• Reactive filters for phosphorus treatment in wastewater (2009-2013)
• Food Waste Disposers (FWD) - Long term impact on sewerage (2010-2011)
• Fat, oil and grease in sewer systems (2007-2009)
• Early warning system - Is this something for our municipalities? (2007-2008)