Single-cell protein

Single cell protein (english single cell protein, SCP), also single-celled protein, is a protein-rich substance that has been used since the 1970s, mainly as a protein - and vitamin- containing animal feed. This build microorganisms in mass cultures in bioreactors from simple and inexpensive organic substances proteins and amino acids that are then " harvested ". Among the employed microorganisms include yeasts such as Candida, for example feeding or Pichia, and bacteria such as Methylophilus and Methylomonas. Also algae can be used.

As organic substance used, for example, methanol or methane, which are implemented by methylotrophic bacteria., Ethanol may serve as the substrate. In general, the mass cultures growing on waste or by- products of agriculture and the food industry. Big advantages are the high growth rate and yield of crops. Compared to the soybean plant, the biomass thus produced to a higher protein content. If yeasts are used, also the vitamin content is increased. There are also disadvantages of the SCP. Thus, the proportion of some amino acids may be too low, also nucleic acids and fats are included, which can be undesirable. Apart from this, there is the risk that toxic mycotoxins produced.

Soybean, alfalfa or fishmeal SCP can not compete on cost grounds.