featured image thumbnail for project Fish Sludge Treatment


Fjell Technology Group recycles sludge from aquaculture facilities and municipal wastewater plants.

The sludge is used as an additive in fertiliser or other agricultural products.

Fjell Technology Group has a unique combination of long experience and high competence, and is a leader in research and development in the industry. We can supply equipment in full range from hatcheries, to smolt farms , to post-smolt farms, to land-based ongrowing fish plants and semi-closed and closed ongrowing fish farms in the sea.

We use award-winning technology without the use of chemical polymer for the purification stage of waste water from drum filter and biofilters (electro coagulation). We dewater and dry the wastewater sludge from the purification stage with tested and reliable in-house technology and from collaboration partnes. The TMD dryer is our standard processing equipment for drying, sanitising and stabilizing the sludge. Fish sludge is extremely difficult to dry efficaciously due to variations in fatty acids composition and a troublesome glue phase. the TMD dryer handles these obstacles without any problems.

The FTG Fishsludge Recovery System (FRS) system can dry sludge from 0.1 per cent Dry Matter (DM) and up to 99 per cent DM.

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Fish sludge is very demanding to dry but the TMD mill is specifically adapted to this challenging, fiberless material and its high fat content. Particularly the glue phase can be a problem, however the patented TMD mill is robust and resistant. System is also not sensitive to plant load (altered biomass), or changes in composition.

The dried sludge is repurposed as an additive for producing fertilizer, or in other agricultural products that rely on nutrients such as nitrogen and phosphorus. Fjell's technology contributes to a circular economy by recycling heavy metals and nutrients from sludge and wastewater.

featured image thumbnail for project Fish Sludge Treatment

The solution helps fish farmers and municipal waste plants minimize the need for waste management and transport, which cuts both costs and emissions from production and treatment processes.

The plant requires minimal maintenance and supervision and delivers stable and hygienized sludge.

TMD is offered with Thermtech (technology owner) and partner - electro flocculation is offered with Power & Water as partner.

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