The animal feed industry remains largely dependent on soy and fishmeal. However, these two sources present serious hurdles to sustainability due to environmental pressures, supply risks, and rising costs. The industry is no longer just looking for “more protein,” but for “smarter protein sources.”
Alternative proteins, especially insects and single-cell proteins (SCPs) produced by microorganisms, are at the heart of this transformation. Yet, the value of these sources is no longer determined solely by production efficiency, but by the extent to which they contribute to the circular economy. Insect farming, in particular, stands out for its potential to convert food waste into high-value feed protein. However, some experts argue that these wastes could also be utilized directly in feed formulations.
The sustainability of insect farming seems closely linked to material used for feeding. Some life cycle analyses show that environmental impacts can be significantly reduced if by-products that cannot be used as human food are utilized in insect feed. However, significant legal barriers still stand in the way of this. Expanding permits for by-product use and diversifying raw materials could accelerate the sector’s transition to circularity.
Another important point is logistics. Insect farms fed with by-products need to be close to waste sources; otherwise, transport costs could overshadow the environmental benefits.
On the other hand, single-cell proteins also present a strong alternative for valorizing industrial side streams.
Ultimately, whether insect or microorganism- based, the true potential of alternative proteins lies not only in production technology but also in innovative resource management. The circular economy approach will minimize the environmental impact of these new proteins while also determining the future resilience of the feed sector.
In this issue, as we discuss the place of alternative proteins in the circular economy, we return once again to the question: What resources and approaches are we truly relying on to build a sustainable feed chain?
Hope to see you in the next issue…
