Our Partners within DRIZZLE

DRIZZLE consists of 13 partners.

Aarsleff

Aarsleff is Denmark's largest construction and civil engineering contractor with operations mainly in northern Europe. The main areas that form the basis of the group are civil engineering, foundation engineering and pipe technology.

The business includes civil engineering, including completed and ongoing projects in climate adaptation, digitalisation of business and operational functions, construction of water and sewage plants, coastal erosion protection, mounds, shoreline lining, beach nourishment and vegetation establishment. Aarsleff Pipe Technologies is the market leader in trenchless pipeline renewal in Sweden, and its membership of the Group means that experience is drawn from the rest of Europe. Aarsleff is listed on Nasdaq Copenhagen A/S, has a turnover of SEK 28 billion and has 8,600 employees.

Building and maintaining a sustainable society also requires sustainable solutions. The long-term nature of solutions from a quality and quantity perspective is sought, and for our part this is achieved through close co-operation with experts. Access to experience in water management and the readiness of the Swedish organisation is the contribution to the project. As members of DRIZZLE, they want to contribute to the success of the project by maximising its research efforts and ensuring that research results can be developed for the greatest benefit of stormwater stakeholders and, above all, the future environment.

Aarsleff Pipe Technologies' participation in DRIZZLE includes participation in the board, project work and production of materials.

Read more about Aarslleff here External link, opens in new window..

Luleå University of Technology

We collaborate closely with a large number of companies, ranging from very small to large multinationals, other Swedish research institutions as well as various departments in municipalities, to develop goods and services based on stakeholder needs and to solve challenges and create opportunities related to the DRIZZLE research area for future generations.

Luleå University of Technology hosts the DRIZZLE competence centre and is responsible for building and developing research and collaboration.

Lumire

Lumire is a municipal environmental resource company in Luleå that handles water supply, recycling and waste management.

It started more than a hundred years ago when a group of entrepreneurs in Luleå started a waste company to improve sanitation and living conditions. A company that many years later became the Lumire we know today. A company that has been given an ever-increasing task that includes recycling and waste management as well as water and sewage issues and their development for the city's more than 75,000 inhabitants - a figure that will hopefully increase in line with the green transition that is taking place at high speed.

Cycles that take place between people, which also include water, earth and air. A desire to promote new ideas, preferably in collaboration with universities, research and other companies, to jointly develop smarter solutions and pave new paths while managing our resources with care. These are examples of efforts that drive the company's roughly 200 employees.

DRIZZLE is a good example of a collaborative project where Lumire's expertise and interests are put to good use. A project that both Luleå and other snowy cities with long winters will be able to learn from. Climate change - and improvements - know no geographical boundaries.

With climate change, the challenge of stormwater management in the urban environment is growing. Changing rainfall patterns, an aging stormwater network, polluted stormwater and densified cities are a combination that confronts those involved in water and wastewater planning. In cold climates, another aspect is added.

Urban snow and meltwater are included in the definition of stormwater but are rarely integrated into stormwater systems. In Luleå, there is snow on the ground about five months a year. There is a great need for solutions that can handle stormwater in cold climates. Being a part of DRIZZLE means that Lumire can apply research results in its own operations and more quickly reach solutions that benefit the citizens of Luleå.

Lumire participates in DRIZZLE by sitting on the board of the centre, actively participating in several research projects, funding a collaborative PhD student and constructing a pilot plant for stormwater research in cold climates. Read more about Lumire here External link, opens in new window..

NCC

As an expert in managing complex construction processes, NCC contributes to construction that has a positive impact on customers and the development of society as a whole. Operations include construction and infrastructure projects, production of asphalt and stone materials and commercial property development.

Increased urbanisation puts pressure on both society and the environment, with an increased risk of flooding and pollution due to more impervious surfaces, while rainfall also increases. This gives rise to research and development projects that focus on sustainable stormwater management.

Water and stormwater management is a prioritised area within NCC. They have extensive experience and expertise in this area and have worked on a wide range of different projects linked to water and stormwater. They have many employees who work to some extent with stormwater management in the Nordic countries. NCC's success as a reference company is based on using research results in its daily operations. Being a part of DRIZZLE helps us to reach that goal.

NCC contributes to DRIZZLE by, among other things, funding industrial PhD student and long-time NCC employee Robert Furén. Read more about NCC here External link, opens in new window..

Rent Dagvatten AB

Rent Dagvatten AB offering solutions for long-term sustainable management and treatment of stormwater. They collaborate with companies, institutions and research centres that can help create and deliver long-term sustainable solutions for stormwater management and treatment.

Clean Stormwater participates in DRIZZLE with contributions from several of its partner companies and also provides samples and test objects for verification of new sustainable stormwater management solutions.

Read more about Rent Dagvatten here. External link, opens in new window.

Stockholm Vatten och Avfall

Stockholm Vatten och Avfall, as part of the City of Stockholm, is one of the largest operators of stormwater management in Stockholm.

Stormwater should be treated in a sustainable way to fulfil the environmental quality standard for good surface water status. Therefore, there is a need to develop compact, efficient and evaluated stormwater facilities for urban areas where space is limited. Furthermore, there is a need to equalise flows when the city is densified and to plan the city to deal with cloudbursts.

Stockholm Vatten participates in DRIZZLE by enabling test sites for the stormwater system and by providing available expertise and support to the different projects. Stockholm Vatten also benefits from the knowledge and experience shared in the network.

Read more about Stockholm Vatten och Avfall here External link, opens in new window..

StormTac

StormTac AB is a consulting company that works with stormwater and receiving water investigations, projects and research.

The company has developed and offers the application StormTac Web, which is a stormwater and receiving water model for quantification of pollutants and design of facilities for treatment and flow equalisation of stormwater. In a model, StormTac Web includes the interactions within the entire catchment; runoff and base flow, pollutant transport, receiving water impact and treatment criteria, sizing of conveyance systems, pollutants and flow retardation facilities. The model is used as a tool for action planning and is suitable for both quantity and quality calculations within catchment areas. StormTac AB has a long experience in modelling and competence in further developing the model according to market needs. Customers include consulting companies, municipalities and universities in several countries.

StormTac AB participates in DRIZZLE by investigating and developing improved methodology for dimensioning and calculating treatment effects of mainly innovative stormwater solutions for implementation in StormTac Web. More specific work steps are:

• Develop improved methodology for calculations so that the facilities have both flow equalisation and treatment as a function in a more detailed way than before for different facilities. The flow equalisation function is carried out in more detail with regard to the transport system's equalising capacity and thus with regard to run-off time.
• Investigate and implement in StormTac Web additions of biochar and other additives (e.g. compost) and vegetation in different plants and their effect on the treatment.
• Investigate and implement screen basins, dry ponds, floating wetlands and permeable pavements in StomTac Web.
• Investigate and update minimum discharge rates in different facilities (strongly influences the choice and size of the facilities).
• Update standard concentrations for stormwater from different land uses for many substances and for treatment effects, literature studies and compilation in database.
• Investigate and implement in StormTac Web the impact of changing water depth on the treatment effect in ponds.
• Inventory more data from case studies and update the empirical formulas for calculating the treatment effect for about 15 plant types. facility types.

Read more about StormTac here External link, opens in new window..

Stormwater&Sewers

Creating a sustainable society requires a well-functioning water system in terms of ecological, technical, social, economic, cultural and energy aspects. Today, there is a great need for further research in this area, due to, for example, changes in society through increasing urbanisation, new types of chemicals that can occur in the urban environment that also contribute to climate change, lack of resources, etc.

In order to manage the water and wastewater system in an uncertain and in many aspects unknown future and to meet these changing demands, new strategies and methods need to be developed for the urban water system as a whole. These strategies should cover planning and design but also operation and maintenance. Therefore, the national competence network Stormwater&Sewers was established in 2010 to initiate and implement research and development based on stakeholder needs in the field of stormwater and sewerage. Stormwater&Sewers conducts its research in close co-operation with its members but also collaborates with other relevant actors. Stormwater&Sewers is therefore an important catalyst for further co-operation, innovation and research in the field.

Through its involvement in DRIZZLE, Stormwater&Sewers strengthens its reputation both nationally and internationally. Stormwater&Sewers is an active part of DRIZZLE, participating in various projects with staff and facilities and playing an active role in a mutual knowledge transfer between stakeholders and researchers, thus ensuring that research results are implemented faster in society. Read more about Stormwater&Sewers here.

Tecomatic

Tecomatic offers solutions for industries with stormwater treatment needs as well as solutions for municipalities and water producers. Tecomatic specialises in solutions and products for environments where there are problems with erosion of land and fine materials or the spread of environmentally hazardous sediment.

Tecomatic is an active member of DRIZZLE and participates in research projects, workshops and interdisciplinary activities that lead to technological developments within the company. More specifically, Tecomatic contributes with its expertise in stormwater treatment and experience in field work focusing on installation, maintenance and restoration processes. Read more about Tecomatic here External link, opens in new window..

The City of Stockholm: Environment and health department and Transport department

The Environmental Administration works to ensure that everyone in Stockholm lives in a healthy environment. In the area of water, the Administration works to propose city-wide action plans and programmes aimed at describing the measures that need to be taken to comply with the EU Water Framework Directive. In Stockholm's urban environment, this work largely concerns the treatment and purification of stormwater.

Trafikkontoret is the road owner and manager of public land, which includes the city's roads, streets and squares. The management of public land includes operational and maintenance responsibility for street and gutter drains with service pipes up to the agreed connection point.

Både Miljöförvaltningen och Trafikkontoret i Stockholm deltar i DRIZZLE för att kunna ta del av och medverka i utvecklingen av nya metoder för dagvattenrening sett både ur kvalitets- och kvantitetsperspektiv. Staden behöver vidta omfattande åtgärder för att rena dagvattnet så att miljökvalitetsnormerna för vatten som följer av EU:s vattendirektiv ska kunna följas. Det finns ett stort behov av att utveckla yteffektiva reningstekniker och anläggningar som fungerar i tät stadsmiljö.

DRIZZLE:s vision och strategi ligger i linje med stadens handlingsplan för god vattenstatus,stadens dagvattenstrategi och de lokala åtgärdsprogrammen. Stockholms stads åtagande I DRIZZLE är bland annat att erbjuda plats för att utveckla “case” för urban dagvattenhantering där ny teknik och forskning kan testas. Staden finansierar även en kommundoktorand inom ramen för DRIZZLE.

• Environment and health department External link, opens in new window.
• Transport department External link, opens in new window.

Tyréns

Tyréns is one of Sweden's leading consultancy firms in urban planning. In interaction with customers and partners, we create sustainable solutions in urban development and infrastructure. They have 2 700 employees and operations in Sweden, England, Estonia, Lithuania, Poland and Bulgaria. Tyréns is owned by a foundation and our form of ownership enables them to focus purposefully on research and development in the field of civil engineering.

Tyréns is a consultancy firm in the Swedish water sector, with in-depth and broad experience of strategic investigations and design of sustainable solutions in the water and sewage network, surface, ground, drinking and stormwater areas.

The Sven Tyrén Foundation finances a number of R&D projects, PhD students and adjunct professorships every year. DRIZZLE finances research on flood analyses and on the recirculation of rain and storm water. Read more about Tyréns here External link, opens in new window..

Uponor Infra

Uponor Infra is the largest plastic pipe manufacturer for underground pipe systems in Northern Europe and manufactures plastic products for the transport of drinking water, waste water, storm water, process water, air, electricity, telecommunications and data.

Uponor Infra is funding an industrial PhD student who will primarily focus on research and evaluation of stormwater treatment. As an active partner, Uponor Infra will also utilise the full power of the network to influence the direction and take part in other research within DRIZZLE. Read more about Uponor Infra here External link, opens in new window..

Växjö municipality

The water and sewage department is part of the urban development administration in Växjö municipality. Nearly 70 people at the department work daily to deliver good and safe drinking water and to treat and purify wastewater and stormwater according to high standards.

For many years, Växjö municipality has worked with stormwater both to reduce pollution of sensitive lakes close to urban centres and to reduce flooding of the sewerage network during heavy rainfall. They have over 100 stormwater facilities and some have been studied and evaluated for many years, generating a high level of knowledge about stormwater facilities and their function in the organisation. In recent years, PFAS has been highlighted as a problem in the water in Växjö and they see a need for increased knowledge about the sources and the measures that can be taken to reduce the problems. By participating in DRIZZLE, Växjö municipality wants to investigate, characterise and quantify sources of PFAS and other pollutants in stormwater.

Växjö municipality participates in DRIZZLE by sitting on the board of the centre and financing a municipal doctoral student.

Read more about Växjö municipality here External link, opens in new window..