Refining proteins from green crops for high quality feed products for monogastricanimals and dairy cows

Green biorefinery concepts have the potential to become a suitable solution for production of organic protein-rich feeds from green crops. Different green crops such as alfalfa, red clover and clover grasses are studied as possible feedstocks for the development of an organic biorefinery system with refined proteins, ensiled press cake to be used as cattle feed and residual juice with potentials for fermentation of amino acids, lactic acid or other uses. A process was developed by which screw pressed juice from the freshly harvested crop was used for lactic acid fermentation to decrease the pH and precipitate proteins. These refined proteins have a favourable amino acid content and are comparable with soy proteins, especially for poultry where methionine is a limiting amino acid. For production of experimental feed for different animal trials, a demo-scale set up was made for a continuous refining process, which included harvesting and processing of 400 tons clover grass. The clover grass was processed into a protein concentrate, a fiber-rich press cake, and a residual stream of soluble nutrients. The protein-concentrate was used in experimental feed formulations for egg-laying hens, broilers and pigs. The fiber-rich press cake was ensiled without additives, and used as feed for dairy cows. The novel protein refining technique using lactic acid fermentation showed robust results in large scale. Furthermore, the feed trials in mono-gastric animals (poultry and pigs) show promising results although the digestibility with increasing amount of green proteins show a decreasing trend. In addition, the ensiled press residues surprisingly resulted in a 5-10% increase in milk production compared with a traditional silage. Further improvements of the technology is expected to lead to feed products with higher digestibility as well as protein products for human consumption

Refining proteins from green crops for high quality feed products for monogastric animals and dairy cows

Green biorefinery concepts have the potential to become a suitable solution for production of organic protein-rich feeds from green crops. Different green crops are studied as possible feedstocks for the development of an organic biorefinery system. For production of experimental feed for different feed trials, a demo-scale set up was made for a continuous refining process that included harvesting and processing of 400 tons clover grass. The clover grass was processed into a protein concentrate, a fiber-rich press cake, and a residual stream of soluble nutrients. The protein-concentrate was used in experimental feed formulations for egg-laying hens, broilers and pigs. The fiber-rich press cake was ensiled without additives, and used as feed for dairy cows. • a novel protein refining technique using lactic acid fermentation showed robust results in large scale • refined proteins from clover grass have a favourable amino acid content, especially for poultry • feed trials in mono-gastric animals (poultry and pigs) show promising results • ensiled press residues resulted in a 5-10% increase in milk production compared with a traditional silage • the organic feed products are very promising for organic farming of monogastric animals and dairy cow

Green protein from locally grown crops (OK-Net EcoFeed Practice Abstract)

• Choose an appropriate type of green crop, such as clover-grass or alfalfa, with an expected high protein and amino acid content. Consider soil types and weather patterns to grow a crop with a good and high quality yield. • Harvest the field at regular intervals in order to achieve good plant growth and to obtain batches with more high quality protein and less fibre • Harvesting procedures, which minimise soil content in the green material obtained from the field are necessary to obtain good quality green protein and to avoid wear of machinery and technical equipment • Cooperation with a bio-refinery plant is a prerequisite in order to concentrate the protein into a green paste that can be dried and used in poultry feed. • If not dried, the wet green paste can be stored in closed containers/plastic bags in cool conditions for a shorter period. • Chemical analysis of the green protein concentrate is important in order to replace other protein sources such as soya and to carry out the correct feed formulation. This can be done together with advisors or feed companies

Grønt økologisk protein til fjerkræ og svin

Præsentation af OrganoFinery-projekte

Hvordan vådt græsproteinkoncentrat kan opbevares og bruges til fodring af økologiske grise

Våde proteinkoncentrater, der er produceret ved protein bioraffinering af græsafgrøder, kan opbevares i to måneder før direkte anvendelse i foder til grise - men temperaturen og opbevaringen er af stor betydning for kvaliteten