Efficient separation of proteins from agrobiomass by-products
According to research by VTT Technical Research Centre of Finland, extraction with deep eutectic solvents (DESs) offer an efficient, sustainable and easy method for dissolving proteins from agrobiomass by-products. DESs are mixtures of solids that form a liquid solution at low temperatures when mixed in suitable ratios.
The method has been tested on separating protein from BSG, rapeseed press cake and wheat bran, all of which contain significant amounts of protein. These food industry by-products contain significant amounts of fibre, which decreases their suitability as feed for production animals that are not ruminants. Brewer’s spent grain responded best to protein separation with DES: almost 80 per cent of the protein in BSG could be separated, while conventional extraction methods can achieve no more than 40 per cent. The separation of other substances, such as carbohydrates, can be optimised through the choice of DES.
This new protein enrichment method can particularly benefit breweries and animal feed producers, but there are hopes that after further research, this method could also find applications in the food industry. | READ MORE.