Graintec develops new engineering software for the Aqua Feed and Petfood industry

Ramping up for 2018, Graintec now employs two PHD’s in R&D on a permanent basis.
Focus this autumn/winter is enhancing engineering capabilities with smarter engineering software.
Adding further to the progress of research, 3 student engineers are temporarily brought in for support.


We look forward to present our customers to improvement of existing production facilities based on the new research generated. Preliminary results indicate promising outcomes with attractive ROI’s

ENERGY: Reductions in energy consumption for air drying processes.

CAPACITY: Optimizing capacity of existing facilities without adding equipment

ODOR, WATER AND SUSTAINABLE TECHNOLGIES: Prize winning EWOTEC reduces water consumption and odor outlet, and regains energy at the same time. GRAINTEC´s EWOTEC solution has been selected as an AE50 price winner for 2018 by the American Society of Agricultural and Biological Engineers which honors the year’s most innovative designs in engineering products or systems for the food and agriculture industries.

Photo: Graintec’s team of PhD’s and students from University of Southern Denmark working on complex engineering software.

in the back row
Anders Fjeldbo Haubjerg
, Senior Process Engineer in GRAINTEC, Chemical Engineer M.Sc., PhD, Industrial Assistant Professor at University of Southern Denmark
Markus Wied Dethlefsen, Senior Process Engineer in GRAINTEC, Food Science and Technology, M.Sc., Phd.

in the front row
Christian Busk, Student at University of Southern Denmark
Mike Vølund Frederiksen, Student at University of Southern Denmark

Tobias Borg Sørensen, Student at University of Southern Denmark

Future shrimp feed production must adapt intelligent feeder systems

Shrimp Feeding Technology systems are continually developing

Normal practice at the farms has so far been to feed shrimps manually. However, more and more shrimp farms are now integrating smart feeding systems. In a few years we will see intelligent on-line feeding systems feeding shrimp in a much more cost-efficient way. As a result, wasted feed will be reduced significantly in the future. This will contribute to the reduction of environmental pollution.

The complexity of shrimp feeds is higher compared to other type of feeds. Shrimp pellets rapidly absorb water when they hit the pond, and small water-soluble components such a taurine, Vitamin C and ionic salts leach out into the surrounding water. The fundamental principle of future automatic feeding will be to feed shrimps addressing the animal’s demand and in this sense fulfil sustainability issues demanded by the industry.

The key factor for growth optimization and optimal feed conversion is to allow each shrimp to eat few quantities multiple times during the day. This helps to keep the feed fresh before being ingested and the loss of ingredients and nutritional qualities of the pellet under the water will be reduced and/or eliminated.

Shrimps are slow eaters and the pellets can be in the water for hours before they are consumed

By using new automatic feeding technologies it is expected that the retention time of the pellets into water will be reduced to the shortest possible time before being ingested and digested. In order to reach this objective, we must produce shrimp feed with physical and mechanical properties that fit these quality requirements.

For technical reasons modern feed distribution equipment (smart feeders) demands clean and well compacted pellets. The fines produced by the handling, transportation and distribution of the pellets must be reduced to a minimum and the mechanical durability of the pellets must comply with high handling standards. Today extruded feed meets these requirements better than pelletized feed.

We are convinced that the future will demand even higher physical and mechanical qualities of the pellets. The increased number of raw materials and ingredients are changing rapidly and the design of new production facilities must consider these changes.

GRAINTEC is the world’s leading solution provider for state-of-the-art production facilities and processing lines for the manufacturing of extruded aqua feed, and we continue learning from the industry and the technical pellet demands of fish farms.

Contact Graintec in case your clients are demanding high quality levels of shrimp feed. We will together design and integrate the best machinery to your production plant according to your budget and expectations.

Graintec will participate at the Ecuadorian Congress of Aquiculture & AQUAEXPO, GUAYAQUIL 2017 from. Sep 25 to Sep 28. Contact: Cristian Toscano. E-mail:

Towards a sustainable solution for odor abatement and resource recovery

Upcoming presentation at AQUAFEED HORIZONS 2017 JUNE 14TH

The exhaust air from conventional hot air dryers are malodorous, humid and warm. Often, separate additional process steps are added to reduce odor and comply with legislation. In these steps, available resources in the air, energy and water, are not utilized. Sometimes, additional energy and fresh water are even used in the added odor abatement processes. The ideal solution should address the dryer exhaust, in a single end-pipe solution, integrating odor reduction, energy recovery and recirculation of condensed water. Graintec R&D has taken significant steps towards developing new technology to accomplish this goal.

The technology is a result from cooperation between Graintec R&D, the Danish Environmental Protection Agency as well as aqua feed and petfood producers. Results from this cooperation, as well as insight into the new technology, will be presented by PhD Anders F. Haubjerg, Graintec A/S.
Not attending the forum? Don’t hesitate to contact us at for a consultation on engineering or reengineering drying processes.

Bulk logistic and gentle handling of salmon feed

In recent years various ways of a more rational and gentle transport of especially salmon feed have been requested by fish feed manufactures and fish farms.

Because of this, Graintec has over the last 10-12 years supplied bulk handling systems for new or rebuilt boats and onshore bulk handling and silo installations, which can bring the fish feed as a bulk product directly to the fish feed barge.

The pellets are stored directly into onshore bulk silos and from the silos the feed pellets are transported directly and gentle into the feed bulk boat and shipped to the feed barge from where it is finally fed to the fish.

Once the logistic chain is set, the advantages of this solution are a more efficient handling of the feed with less need of manpower, profitable transportation time and no packaging costs. Finally yet importantly, the environment benefits of the gentle handling without pellet waste and packaging handling gives an improved green footprint solution.


Fig. The Logistic Salmon Feed Delivery Chain


Presently it is estimated that more than 35% of all salmon feed in Norway is handled as bulk products but this percentage will most probably grow further in the coming years. GRAINTEC will continue to stay in from with smart solutions for gentle handling and storing of bulk fish feed.



Fertilizer pellet production with nutrients

GRAINTEC is currently working on a project for a facility for IVAR IKS in Norway, which is to produce fertilizer pellets of dried sludge with additives. To increase the sales potential, IVAR IKS has looked at opportunities to raise the fertilizer value by adding nutrients, namely urea and potassium chloride, to the sludge from a wastewater treatment plant.
Tests and trials of the production have proven to be very successful. Machine Installation has been completed successfully in June 2014 and is now under test. Production is expected to be ready in December 2014.


The production building has a total of 1150,2 m² on four floors. The production target is 10,000 tons of finished pellets per year, corresponding to 6 tons per hour. GRAINTEC stands for the process installation and electrics and control.



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