Annelie Hedström

About me

Annelie Hedström’s primary research interests relate to the development of resource-efficient, robust, and sustainable wastewater systems. Within the field of sewer networks, Annelie focuses on topics concerning the development of methods for condition assessment of sewer infrastructure, pipe rehabilitation and its coordination with street renewal, inflow and infiltration, as well as sewer pipe installations and vacuum systems. In the area of resource-efficient and small-scale wastewater systems, field studies are conducted to investigate system performance, including the removal of micropollutants and microplastics. Both small treatment plants and low-intensity, nature-based treatment systems are studied. Source-separating wastewater systems are examined using system analysis, and laboratory work is conducted to develop methods for concentrating the toilet wastewater fraction to enable nutrient recovery. Furthermore, Annelie participates in projects related to treatment processes and systems for greywater and water reuse, including the occurrence and removal of micropollutants. She is also involved in projects concerning advanced treatment components for stormwater, such as chemical precipitation, membrane filtration, and zeolite filters for treating runoff from copper roofs. In addition, she has contributed to research projects related to planning processes aimed at increasing the implementation of sustainable stormwater systems. Annelie regularly participates in projects focused on evaluating system solutions and developing decision-support tools using multi-criteria methods.

Research Projects

• Stormwater&Sewers 2010-
• Creaternity 2020-
• StreetWise 2026-
• 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-
• Constructed wetlands for wastewater treatment: Adaptation to cold climate 2019-
• Drizzle 2017-

Completed projects

• Decentralised treatment and use for blue-green public spaces (2019-2024)
• 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)