Erko Settefisk was one of our first plants to clean sludge from RAS plants.
At the beginning of such a project, it is important to get the correct data on the outgoing water volumes from the plant and especially the amount of feed.
The amount of salt in the water is also of great importance - to be able to set up solutions for solutes as well as total suspended solids. Finally, it is the degree of cleaning that the customer needs, which then sets the conditions for the choice of equipment and the design.
FTG designed and engineered a solution based on three steps:
1. Flocculation - with help from dedicated supplier within electro flocculation - capturing and thickening the dry solids from 0,5% to 5,5%
2. Then sentrifuge the dry solids until a sludge of approx. 22%.
3. Dry the sludge with a thermo mechanical dryer to above 90%.
Since the commissioning period the sludge drying system has been running problem free - please contact us if you have any questions regarding setup, solutions or if we can help you in any way.
The machinery can be installed at any land-based fish farming facility or wastewater plant. It can dry sludge from 0.1 per cent dry substance (ds) and up to 99 per cent ds.
Fjell’s dryer design is patented and market-leading, and for drying large volumes of sludge it is the most energy-efficient dryer available on the market.
The dried sludge is repurposed as an additive for producing fertiliser, or in other agricultural products that rely on nutrients such as nitrogen and phosphorus.