Quality control is a fundamental part of today’s food production industry, yet many factors that affect quality are not easy to assess with current technologies. A team of well-trained workers can pick out bad apples from a production line, for example, but very small items like wheat grains can also vary in quality in ways that are not detectable, even by the keenest of eyes. Wheat kernel composition is closely related to final product quality, and while plant breeders are actively developing tailor-made grains with novel starch and other characteristics, these factors still vary widely even within a single plant.

“Humans realised very early that not all grains are created equal,” explains Bo Löfqvist, CEO of Sweden’s BoMill AB, “but the process of sorting grains by hand is very tiresome and inefficient, so we devised machines to do it automatically.” Today, the most common technological approaches to sorting grain, seeds, and other small particles involve detecting size, colour or density. “They are effective to a certain extent,” says Löfqvist, “but there are still other characteristics, of wheat grains, for example, that cannot be detected by any of these methods and that nevertheless have an important impact on quality.”

Kernels at the kernel

BoMill is a small company based in Lund Sweden. Its motto is, ‘We qualify grain one by one’, and that’s exactly what they are doing with the new TRIQ SORTING system. BoMill’s EUREKA partner is Cimbria Heid, another small company, based in Austria, which specialises in the development and installation of seed and grain processing plants. Its product range includes all machines required for the cleaning, drying, sorting, treating, weighing and packing of seed.

Together, Löfqvist’s team have devised a system for sorting wheat grains and the like based on internal content, not external appearance. “We know that there are qualitative differences between individual grains of wheat,” he explains. “Even on a single wheat plant, which produces a maximum of about 100 grains, there are significant qualitative differences between the individual grains. Some of the grains will be better suited to biscuit production, for example. Others will make better bread. A third type will be best for producing pasta.” But, until now, says Löfqvist, it has been very difficult to tell these grains apart, and some existing methods for determining kernel quality are destructive.

Ingenious device

“The TRIQ SORTING system involves capturing individual particles, in this case wheat grains, in little pockets on the inside surface of a specially equipped cylinder, sort of like the drum of a clothes washing machine,” says Löfqvist. The grains are irradiated individually with infrared light and the reflections analysed by a specially designed detector. From there, the grains are shot out by bursts of air into appropriate receptacles. The cylinder rotates and the next batch of grains is analysed.

Löfqvist and his team say the new system simplifies the wheat grain sorting process. “We have already demonstrated the feasibility of this system for sorting wheat for food production. It has also been used to sort malting barley.” Incredibly, he says the system is capable of sorting, with a high degree of accuracy, as many as two billion individual wheat kernels per hour. The market potential is also staggering, considering the wide range of possible applications in the food industry alone.

“The project has been very successful,” says Löfqvist. “We have managed to identify the principals for upscaling the capacity of our more or less handmade prototype by a factor of 500.” The TRIQ SORTING team is now looking forward to further operational testing and, ultimately, full-scale commercialisation.

“EUREKA was instrumental in helping to get the new system up and running,” says Löfqvist. “We are now looking to move our machine onto the market where we are hoping for a very good reception.”

High praise for EUREKA

Löfqvist says that for SMEs like BoMill, finding appropriate funding sources can be a nightmare. “EUREKA, on the other hand, inspires us,” he explains, “and gives us hope to continue with our entrepreneurial work. Personally, I would like to see EUREKA given a mandate to support projects one step further towards commercialisation. They know the European dimension and they know how to set priorities, how to plan and how to follow up in order to secure success.”

“I have never worked with a research instrument as skilled and efficient as EUREKA,” says Löfqvist. “And you should know that I have worked with many, as an applicant, as a receiver of funding and as an officer. In my opinion, EUREKA is excellent in directing and focusing R&D work towards commercial goals. They really contributed to the successful outcome of this project through their experience and skill.”

The EUREKA Initiative aims to strengthen European competitiveness by promoting cross-border, market-oriented, collaborative R&D. It enables industry and research institutes from 37 member countries and the EU to collaborate in a bottom-up approach to developing and exploiting innovative technologies.
Since 1985, substantial public and private funding has been deployed through EUREKA, an intergovernmental network to support leading edge R&D.