“The brewing industry is in dire need of reducing waste,” emphasizes Haibo Huang, Dr.
“Waste grain has a very high percentageprotein compared to other agricultural wastes. Our goal was to find a new way to extract and use it,” adds Yanhong He, a graduate student who will present the results of his work at the meeting.
Craft brewing has become more popular thanever. The increased demand has led to an increase in production, causing a significant increase in brewery waste, 85% of which is used grain. This byproduct contains up to 30% protein and up to 70% fiber. And while cows and other animals can digest waste grain, it is unsuitable for humans due to its high fiber content.
To turn this waste into something morefunctional, scientists have developed a new wet-milling fractionation process to separate protein from fiber. Compared to other methods, the new process is more efficient because researchers do not need to dry the grain first. They tested three commercially available enzymes—alcalase, neutrase, and pepsin—in this process and found that treatment with alkalase provided better separation without losing large amounts of any of the components. After the sieving stage, the result was a protein concentrate and a fiber-rich product.
Up to 83% of protein in ground grain is recycledcaptured into protein concentrate. Researchers initially proposed using it as a cheaper replacement for fishmeal to feed farmed shrimp. But more recently, scientists have begun to explore the use of protein as an ingredient in food products, meeting consumer demand for alternative sources of protein. However, as a result, the fiber-rich product continued to remain without much use.
As a result, scientists found the bacterium useful.Bacillus lichenformis.It converts various sugars into 2,3-butanediol, a compound used to make many products such as synthetic rubber, plasticizers, and 2-butanol, a fuel.
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Fractionation of natural substances - separationelements from a single array under the influence of changes in the physical and chemical parameters of the host environment. Fractionation analysis considers the behavior of at least two elements.
2,3-butanediol is an organic compound with the formula (CH2CHOH) ₂