11 Jun 2021
EUR 41 million
Infrastructure, transportation and telecom
|Date of agreement:||2 Sep 2020|
|Customer:||City of Stockholm|
|Amount in SEK:||SEK 1,000 million|
|Amount in EUR:||EUR 97.23 million|
|NACE sector / loan type:||Sewage and refuse disposal, sanitation and similar activities|
This loan contributes to climate change mitigation: 42%
This loan has a positive effect on maritime environments: 38%
NIB is providing the loan to finance part of the City of Stockholm’s SEK 2.15 billion investment in its waste, water, and wastewater infrastructure.
Automated optical waste sorting
The City of Stockholm has set a target to collect and utilise 70% of all food waste from 2023 onwards, compared to 25% in 2018. However, the older or more crowded areas of Stockholm do not have sufficient space to sort household waste at source. The city will therefore invest in a centralised automated optical waste sorting facility to maximise the recycling of garbage into useful resources.
The plan is for households to start sorting their foodwaste into a coloured bag, which can then be disposed into the same garbage bin as other household waste.
The collected waste bags are transported to the waste sorting station at the neighbouring site of the existing Högdalen waste-to-energy plant. There, optical equipment will sort the waste bags according to their colours. Short-range infrared rays will analyse the surface of the plastic waste fractions before they are sent for recycling.
This will enable sorting the waste into five categories: food waste for biogas production; combustible household waste for energy production; and plastic, magnetic and non-magnetic materials for recycling and utilisation in the production of new products. These measures are the foundation for circularity in terms of household waste being processed into new products.
The capacity of the waste sorting station will be 150,000 tonnes of household waste per year, making it one of the largest of its kind globally. (42% of NIB loan amount.)
The city will also upgrade the Lovö drinking water plant and distribution network in the Stockholm region to secure its water production for a growing population. The plan is to gradually increase the current capacity of 180,000 cubic meters (m3) per day to 320,000 m3 by 2050.
The loan from NIB will finance the refurbishment of the building, UV aggregate, water intake, fast filters, slow filters, and chemical treatment, a new building for ultra-filters, as well as the installation of new interlocking apparatus and new coal filters. (20% of NIB loan amount.)
As more houses and roads are being built, the areas for natural filtration and evaporation of rainwater are being reduced. In order to reduce flood damages, the city will upgrade its pipes and ponds for storm water collection and treatment. The upgrade is also adapting the city’s storm water collection for events of heavy precipitation due to climate change. (16% of NIB loan amount.)
The city will connect new residential areas and summer cottages to its centralised sewage system, thus ending inefficient de-centralised treatment of sewage. The need for wastewater treatment capacity will due to population growth. The project will also reduce the amount of untreated wastewater discharges into the ecosystem through flooding. (23% of NIB loan amount.)
Stockholm is the most populous municipality and city in the Nordic–Baltic region. The city is one of the fastest-growing regions in Europe and benefits from a strong economy and a rapidly growing population. The city is a longstanding client of NIB, co-financing the Henriksdal wastewater and Slussen projects.
Productivity: The new waste sorting capacity will increase resource efficiency.
Environment: When waste replaces virgin raw materials, environmental benefits appear along the whole value chain. The project supports the transition to a circular economy model.
The upgrading of pumps and pipes will connect around 2,000 new and existing households to the network. Improving the existing drinking water infrastructure contributes to urban development, security and stability of operations.
The project is expected to decrease the number of annual hours per year when the storm water system overflows to the sewage system, which occasionally also floods out untreated sewage to the environment. Additionally, the storm water dams included in the project are expected to increase the retention of primarily phosphorus into the Baltic Sea.
Productivity: The upgrade and expansion of the network will add around 6,000 population equivalents to the centralised network.
Environment: Although more households will be connected to the centralised sewage system, the discharges of pollutants into the Baltic Sea is expected to decrease.
The unloading, sorting and reloading of trucks will take place inside a new building equipped with sufficient odour mitigation measures such as air locks and odour mitigation measures in the ventilation system.
No environmental concerns identified.
Most of the subprojects under the storm water collection and treatment infrastructure investment are designed to manage a worst-case precipitation of 100 years.
The main environmental issues related to the water infrastructure are discharges of pollutants into the Baltic Sea.