{"id":13551,"date":"2026-06-01T11:19:55","date_gmt":"2026-06-01T09:19:55","guid":{"rendered":"https:\/\/fvb.se.ny.haus.se\/fvb-news\/major-improvements-for-water-when-two-sewage-treatment-plans-become-one\/"},"modified":"2026-06-01T13:32:03","modified_gmt":"2026-06-01T11:32:03","slug":"major-improvements-for-water-when-two-sewage-treatment-plans-become-one","status":"publish","type":"fvb-nytt","link":"https:\/\/fvb.se.ny.haus.se\/en\/fvb-news\/major-improvements-for-water-when-two-sewage-treatment-plans-become-one\/","title":{"rendered":"Major improvements for water when two sewage treatment plans become one"},"content":{"rendered":"\n
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Two outdated sewage treatment plants in Str\u00e4ngn\u00e4s municipality are to be merged into one modern plant to meet new capacity andenvironmental requirements. FVB plays a leading role in the project, with responsibility for electricity and automation in one of the region\u2019s most technically demanding water projects. <\/strong><\/p>\n\n\n\n

Str\u00e4ngn\u00e4s municipality has had two separate sewage treatment plants for many years \u2013 one in Gorsingeholm on the outskirts of town and one in Mariefred. But both are based on outdated technology and the Mariefred plant has reached its capacity limit. The municipality is growing and environmental requirements are becoming stricter. <\/p>\n\n\n\n

The municipality has therefore taken a strategic decision to undertake extensive renovation and modernising of the Str\u00e4ngn\u00e4s plant and to close the Mariefred plant.<\/p>\n<\/div>\n\n\n\n

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New control cabinet for the carbon source system, where ethanol is used to reduce nitrogen in the existing MBBR (Moving Bed Biofilm Reactor) before the water continues to the wetland.<\/em><\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n

The project, which started in 2024 and will run to the end of 2027, will involve the building of a new biological purification plant for more efficient nitrogen reduction and the renovation of basins and existing aftertreatment with a new control and monitoring system. A 16-kilometre transfer pipe has already been built in parallel to the renovation works, running from Mariefred to Gorsingeholm, partially under Lake M\u00e4laren. <\/p>\n\n

\u201cA major challenge with the project is that all the new construction at Gorsingeholm has to be done on a site where the existing water treatment plant continues to operate normally,\u201d says Peter Eklund.<\/p>\n\n

He is the Project Manager for control and automation at FVB and responsible for the SCADA (Supervisory Control and Data Acquisition) system used for the project. FVB\u2019s responsibilities include electrical construction and control programming. <\/p>\n\n

\u201cThe extensive renovation work is intended to make the treatment plant more process intensive. Since the project started, additional elements have been included, such as the switchgear being replaced and backup power being installed. Solar panels have also been installed on the new buildings, which obviously impacts the elements FVB is responsible for,\u201d adds Eklund. <\/p>\n\n

When the modernised treatment plant is ready, it will resemble an industrial process operating 24\/7. To ensure no disruption to operations and optimisation, the control and automation technology is key. <\/p>\n\n

\u201cFVB is responsible for everything related to automation, from electrical constructions to the overall monitoring system,\u201d explains Eklund.<\/p>\n\n

The work is being done in three phases, starting with electrical constructions. A central element is designing the cabinets to house all the electrical and electronic controls needed to control a specific machine or process section, including communication between the various units. When the cabinets are built and in place, they have to be programmed, which is done by FVB\u2019s control system developers. They write the programs to control processes in the treatment plant, for example when a pump is to start and how much a valve should open.The final phase is commissioning, which will include monitoring via the SCADA system iFix, which means the entire plant can be monitored in real time from a control room. <\/p>\n\n

\u201cWe are developing the control room\u2019s process diagrams, so that the operators can control the plant. Other important elements involve the operators being able to analyse their process data and get valuable information such as environment and energy data for analysis and follow-up, not to mention having an effective alarm management system to deal with process disruptions.\u201d <\/p>\n\n

The fact that this is a technically demanding project makes it even more interesting according to Eklund.\u201cUnderstanding the problems and challenges faced by all the parties involved in building such a complex plant is educational. There are no ready-made solutions or off-the-shelf products available, we simply have to continuously adapt to the site and the specific conditions, which includes the properties of the wastewater. It makes it both challenging and enjoyable,\u201d he says. <\/p>\n\n

Additional information:<\/strong>Peter Eklund, +46 21 81 80 64.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Two outdated sewage treatment plants in Str\u00e4ngn\u00e4s municipality are to be merged into one modern plant to meet new capacity andenvironmental requirements. FVB plays a leading role in the project, with responsibility for electricity and automation in one of the region\u2019s most technically demanding water projects. Str\u00e4ngn\u00e4s municipality has had two separate sewage treatment plants […]<\/p>\n","protected":false},"featured_media":13484,"menu_order":0,"template":"","expertise-cat":[],"services-cat":[],"fvb-categories":[179],"fvb-nytt-cat":[],"class_list":["post-13551","fvb-nytt","type-fvb-nytt","status-publish","has-post-thumbnail","hentry","fvb-categories-artiklar"],"acf":[],"_links":{"self":[{"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/fvb-nytt\/13551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/fvb-nytt"}],"about":[{"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/types\/fvb-nytt"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/media\/13484"}],"wp:attachment":[{"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/media?parent=13551"}],"wp:term":[{"taxonomy":"expertise-cat","embeddable":true,"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/expertise-cat?post=13551"},{"taxonomy":"services-cat","embeddable":true,"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/services-cat?post=13551"},{"taxonomy":"fvb-categories","embeddable":true,"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/fvb-categories?post=13551"},{"taxonomy":"fvb-nytt-cat","embeddable":true,"href":"https:\/\/fvb.se.ny.haus.se\/en\/wp-json\/wp\/v2\/fvb-nytt-cat?post=13551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}