Once a buzzword in the biofuel industry, algae are gaining attention for their application to the feed and food industries as a highly sustainable source of protein and DHA omega-3 enrichment. As such, Alltech is continuing to expand its algal DHA plant in Winchester, Ky., USA, one of only two plants in the world commercially producing a high-DHA heterotrophic microalgae. The facility, which is capable of producing approximately 15,000 tons of algae, has already been updated since its opening in early 2011.
“Even with this growth, we will have the need for continued expansion globally because a commercially available source of algal DHA benefits the entire food chain, including human health with DHA as an essential omega-3 fatty acid,” said Becky Timmons, global technical director of Alltech Algae.
Although most commercial algae production is done using an autotrophic method that requires open, outdoor waterways, the heterotrophic method used by Alltech utilizes indoor fermenters. The closed-system nature of the heterotrophic growth method provides high levels of sterility and process control, which produce a purer and more consistent algae product. Several studies have also indicated that the omega-3 fatty acid content of algae can be two-three times higher when produced through the heterotrophic method.
In humans, the nutritional importance of DHA omega-3 is linked to brain and eye development as well as the reduction of coronary heart disease and Alzheimer’s disease. There is also believed to be a link between sufficient dietary DHA omega-3 intake and depression in the population, which, in the United Kingdom, for example, costs the health industry £80 billion, more than cardiovascular disease and cancer combined.
When used in animal diets, DHA omega-3 from algae can increase immunity, fertility and overall health. Benefits to the farmer or producer include its availability and sustainability as well as the branding opportunities it provides as a value-added product in the marketplace.
Traditionally, DHA omega-3 has been supplied through fish oil, which is dwindling in supply and non-sustainable besides having a taste not favored by consumers. DHA omega-3 produced through algae is a viable alternative to fish oil that can be quickly produced commercially with limited land use and no detectable “fishy” taste in the functional foods sold to consumers.
“The response of the food industry to commercially available algal DHA has been very positive,” said Steve Bourne, global director of Alltech Algae. “It is seen as a form of natural enrichment with additional benefits, such as improving the visual and sensory experience of food, thereby offering food producers additional means to market to and please the consumer.”