Previous studies show that the potential to make municipal wastewater treatment plants (WWTPs) more energy efficient is great. The largest energy use at WWTPs is found in the aeration of the biological processes in the wastewater treatment.
Sweden Water Research conducts research into water and develops new, effective solutions to meet the future challenges facing the water services industry.
We create, run, participate in and initiate projects that seek out suitable partnerships, with the ultimate aim of increasing knowledge of successful methods for the development and climate change adaptation of the cities of the future. Projects within Sweden Water Research are run in close collaboration with the owner municipalities and will, in either the short or the long term, benefit day-to-day operations.
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During 2021-2022 bromate formation in ozonation and regeneration of activated carbon were investigated at Sjölunda wastewater treatment plant (WWTP) within a prestudy for a rebuild of the wastewater treatment plant in order to meet a growing population. The project was financed by the Swedish Environmental Protection Agency (Naturvårdsverket).
This project investigates the biological status of the drinking water distribution system, with a focus on biostability and measures for securing a stable drinking water quality.
Source separated wastewater systems enable a circular economy through the return of plant nutrients, reduced water use, reduced energy use, increased biogas production and reduced greenhouse gas emissions.
The world food supply is entirely dependent on the use of fertilisers. However, the current fertiliser production practices are not sustainable. Domestic wastewater is an important carrier of resources: especially water, energy and nutrients. In the current centralised wastewater management systems these resources are hardly recovered.
The NPHarvest process consists of a pre-treatment process for ballasted sedimentation with lime for removal of particles and recovery of phosphorus as well as nitrogen recovery by ammonia stripping with hydrophobic gas-permeable membranes. The new process has low energy requirements, and uses standard chemicals. The products are pure ammonium salt and hygienically solid material containing phosphorus.
Cultivating urban bazaars is an innovation project whose goal is to build a small-scale, sustainable industry through urban cultivation that creates new jobs and the opportunity to reach out to start-up companies focused on innovative environmental technology.
IVL Swedish Environmental Institute, together with a number of project partners and through financial support from, among others, Swedish Water & Wastewater Association, has carried out a review of methods for recycling nitrogen, sulphur and potassium from wastewater.
In 1981, field trials were started to investigate the short- and long-term effects of the spread of municipal sewage sludge on arable land. Initially, there were five test fields, but for a long time the project has been concentrated on two of them: Igelösa outside Lund, which receives sludge from the Källby Wastewater Treatment Plant (WWTP), and Petersborg outside Malmö, which receives sludge from the Sjölunda WWTP. The project has so far had nine stages of four years each. The period 2018-2021 will be the tenth stage of the project.
Supply of digested sewage sludge to arable land provides significant carbon storage in the soil and thus contributes to reduced greenhouse gases in the atmosphere.
Seven water and wastewater service organisations, together with two research institutes, have evaluated the conditions for opening up municipally owned wastewater treatment plants to test techniques for recovering nutrients from wastewater streams.
Government funds are currently being invested in feasibility studies and investments for upgrading wastewater treatment plants (WWTPs) with the aim of removing organic micropollutants, such as pharmaceutical residues. What driving forces lie behind the municipalities and water- and wastewater organizations work with this issue and do the investments end up where they contribute the most?