Mycoprotein Production Process

Promyc is our main mycoprotein product. At the basis of how we make mycoprotein lies fermentation, a technique that has been around for millenia but that we improve with state-of-the-art technology and know-how. Producing protein through fermentation is many times more time-, cost- and feedstock-efficient than traditional farming, with much less environmental impact. It also enables the decentralization of food production, making it possible to produce Promyc directly wherever it is needed.

Mycoprotein is not a novelty. This alternative protein source is already common in the market in countries like Sweden, UK or US. Our innovation lies firstly, in the use of different fungi that allow for a better texture and better nutrition, and secondly, in an innovative process that creates a circular economy approach solving the global problems of food waste and food sustainability.

Just below you will find a virtual tour around a pilot production unit for Promyc protein. A production unit of 10 m3 enables the production of up to 1000 kg Promyc per week. Pilot production units are a valuable facility for testing and validating the process in a large scale.

mycorena fungi fermentation

Protein gone full circle

How Mycoprotein can be a Circular Process

We developed a proprietary and innovative fungi-based process to create valuable protein from low-value or low-impact resources. This is an option for industries who want to create value from food side-streams in their process. We specialized and optimized our process to convert by-products and side-streams rich in carbohydrates into a protein-rich fungi biomass. The biomass is then processed into mycoprotein that can be included in your own products.

Step-by-Step Process Flow

How does a production unit work?

Step 1

Substrate & Fungi Preparation

Step 2


Step 3

Downstream Processing

Step 4

Product Formulation


Substrate & Fungi Preparation

The substrate of the fermentation is often raw material from tuber crops. Alternatively, side-streams from food industries can be used for custom solutions. The substrate is prepared to make sure the fermentation process happens in the most efficient way. Preparation depends largely on the type of side-stream and has been optimized at lab- and pre-pilot scale earlier. Both liquid and solid streams can be used in the process, up to 10 000 L or 200 kg, respectively, per run. We work closely with food industries to identify side streams that are suitable for the Promyc process.

A small volume of our proprietary fungi starter culture is added to kick-start the fermentation process.


Fermentation & Biomass Production

At the heart of Promyc production lies the fermentation process. In our custom-designed bioreactors we provide the fungi with the optimum growth conditions in a highly controlled environment. The fermentation parameters are designed so that during the next 48h the exponentially growing fungi consume up to 95% of nutrients available in the substrate. These nutrients are turned into protein- and fiber-rich biomass. At the end of the fermentation, the starter culture has grown to more than 10 000 times its original size.

Our filamentous fungi grow in a highly branched network, called mycelium. This growth characteristic is what gives the final product its pleasant texture.

Step 3

Downstream Processing

After fermentation, the fungal biomass is separated from the remaining liquid, which has now been depleted of most of its organic loading.

The fresh fungal biomass is processed according to the desired application. Characteristics such as nutrient composition, texture, water content or other parameters can be modulated and customized at this step as required for the final product.


Product Formulation

Rigorous QC with various analytical methods ensures the consistently high quality of our product from start to finish.

Promyc leaves our fermentation facilities and is now ready to be turned into delicious and nutritious food products. This final step will largely depend on the customer’s applications and areas of expertise, but of course we are happy to provide our knowledge and experience in the development phase.


Want to know more about what you can do with Promyc™? Interested in our production process? Go ahead and read more or send us a message and we’ll quickly get back to you!