Henriksdal

There are three enclosed establishment zones at Henriksdal: one on the mountain at Henriksdalsringen 57-59, one at Lugnets trafikplats, and one opposite the churchyard on Kvarnholmsvägen (see map). Site huts, vehicles and materials required for the work are placed in these zones.

Work will take place between the hours of 7am and 10pm on weekdays. 

The work to expand and upgrade the treatment plant is ongoing both in the treatment plant and up on Henriksdalsberget. We are rebuilding post-sedimentation ponds into membrane ponds and we have blasted space in the rock for a new sludge plant.

Ongoing work in the treatment plant

Inside the treatment plant, we are rebuilding the penultimate step in the existing treatment process, post-sedimentation and aeration tanks. The 14 post-sedimentation tanks will be rebuilt and equipped with new state-of-the-art technology, so-called membrane technology. The aeration tanks are being rebuilt with, among other things, new aerators. During the month of June 2020, the first membrane cassettes were installed in the first line and its commissioning is ongoing. After that, the rebuilding continues with two new lines (4 post-sedimentation tanks and 4 aeration tanks).

Sludge dewatering building

Where: We are also working on the Stockholm Vatten och Avfall site to build a new plant for handling the sludge produced by the treatment plant.  A new building will be constructed. Sludge is currently handled outdoors at the Sickla plant. When the expansion of the Henriksdal plant is complete, all sludge will be handled inside the mountain and thereby eliminate the spread of unwelcome odours in the local area.

Illustration showing what the sludge dewatering building will look like from Henriksdalsringen.

Renovation of sludge tanks and digesters

We are also renovating the existing sludge tanks and two of the digesters.

Click on the map to enlarge it

We will need to transport building material to and from the site during the construction period, which means that trucks will be operating on a number of transport routes. At Henriksdal, these transport routes for inbound and outbound traffic will be located along Kvarnholmsvägen, Värmdövägen, Henriksdalsringen, Danvikshemsvägen and Henriksdalsbacken.

The next stage of the rebuilding of Henriksdal's treatment plant is starting. The stage will involve new blasting work.

Preliminary start in August 2021 - Reconstruction of  the biological treatment lines  6 and 7 - Estimated for completion September 2023

Certain work steps during the redevelopment will involve disturbances for the residents of certain parts of the Henriksdalsringen, especially those who live closest to the place where the work is carried out and especially during the period when the roof is being raised in the post-sedimentation tanks.

Work steps

September - Oktober: Shaft

September 2021- March 2022: Raising of the roof in the post-sedimentation tanks.

September-October 21: Blasting of cross tunnels between the aeration tanks.

Planning is still ongoing for these works so all times are preliminary and may change.

New inlet tunnel

A new inlet tunnel is being built to cope with the increased inflow of wastewater to the treatment plant.

Work on the tunnel will start after the summer of 2021 and will take about 9-12 months.

The tunnel is being built under parts of the property Sicklaön 78: 1 (parts of Brf Henriksdalshöjden) approximately 45–60 meters below ground level, with traditional drilling, blasting technology.

Since the boreholes and blasts are made much further down than the technical tunnel that has previously been blasted out, the disturbances are assesseed to be considerably smaller, but they may still affect you who live on the lowest floors of Henriksdalsringen 51–63.

On our progress map, you can see where our work is going.

Link to the progress map.

Our progress map shows how much progress we have made.

First, we will drill long holes over a period of about three hours. This will cause structure-borne noise, similar to when a neighbour drills in one of their walls. The holes will then be charged with explosive, and then we will blast – this will take about 3-5 seconds.

We expect to have time for two to four blasting operations per day. Blasting will cause vibration in the rock that it will be possible to detect in properties on the mountain, primarily on lower floors.

We will measure every blasting operation to make sure it does not damage the properties.

If you feel that you are being disturbed by our work, please contact us. We will then come out to you and make measurements on site.

The basic rule is that residents who receive more than 45 dBA indoors for more than a week are offered replacement housing or the opportunity for temporary stay during the day. Even you who, for example, work at home or have a job that makes you need to sleep during the day, you may be entitled.

Alternative accommodation can be apartment hotels or other apartments.

We can offer alternative accommodation at short notice.

If you are disturbed, give us a call at  08 522 128 80 or email at framtidensavloppsrening@svoa.se

Pre-inspection of apartments and common areas was carried out in the spring of 2018. At that time, approximately 75% of the Henriksdalsringen was inspected. After this, intermediate inspections have also been made.

The most intensive work with the blasts is now complete and therefore the inspection company Ansvarsbesiktning has now carried out follow-up inspections of the homes and premises that were inspected previously.