Creating a ‘green’ feed for pigs

Within the project, which is financially supported by InnovationsFonden, scientists from Aarhus University are working with the company UniBio A/S (who produce a special protein feed based on bacteria), Technical University of Denmark, University of Southern Denmark and the farming cooperative Vestjyllands Andel on the further development of UniBio’s protein product so that it can be tailored to the needs of the pigs. This product will have a significantly lower impact on the environment than the most commonly used source of protein – soy due to a reduced use of dietary protein.

The project aims to develop protein products that are tailored to the pig’s amino acid requirements. The products will be based on a protein feed produced by the bacterial species Methylococcus capsulatus. This species eats methane and converts the gas into biomass with a high crude protein content. This biomass can be converted into a protein granule that can be used in pig feed.

UniBio has patented the design of the fermentation facility that produces the single-cell protein UniProtein®. Now the product needs to be tailored to the pigs’ requirements and the environmental benefits identified.

The building blocks of the protein are amino acids. The individual amino acids added to the feed are those that the pig needs in specific quantities. By adjusting the feed composition to meet these individual requirements, you avoid giving the pig more protein than it needs. In this way you also avoid nitrogen from the excess protein being excreted in the manure and ultimately being applied to the field where it may harm the environment.

By experimenting on pigs, Hanne Damgaard Poulsen and her colleagues at Aarhus University will identify the amino acids that are essential when designing protein feeds for pigs for the different stages of their lives. The scientists will also ensure that the new protein products are tested on pigs and that feed digestibility and nutrient balance are mapped.

The environment

By producing a protein feed based on bacteria and natural gas, the impact on climate and environment from meat production can be significantly reduced. In the major oil-producing and oil-consuming countries, much natural gas is being used that could be better used for the production of the new protein feed. By tailoring the protein to pigs’ requirements they will be better able to utilise it, which will benefit both the pig and the environment.

According to a report from DCA – National Centre for Food and Agriculture, Denmark uses around 1.5 million tonnes of soy for animal feed per year. This means that an area measuring roughly 7000 km2 is used for the cultivation of soybean. By replacing soy in the diet with the new protein product, you can eliminate the drawbacks associated with the production of soy.

The 3.5-year project has a total budget of DKK 28 million, 15 million of which has been granted by InnovationsFonden. The project is a collaboration between Aarhus University, Technical University of Denmark, University of Southern Denmark, UniBio A/S and Vestjyllands Andel.

[Source: Aarhus University]