When fermentation is complete, the fermentation tank is full of one huge mix of unused nutrients, water, microorganisms and valuable enzyme.
The enzymes are separated from the rest of the liquid in a large drum-filter. The filter is coated with a thick layer of wax that allows the water and enzymes to penetrate, while the nutrients and microorganisms are caught in the sticky surface of the wax.
As the drum-filter rotates, the fermentation liquid is sprayed on. The water and enzymes are sucked into the middle of the drum, leaving the nutrients and microorganisms on the surface of the wax. A large knife then slices away the wax, nutrients and microorganisms.
Following a series of other filtration processes, the enzymes are finally separated from the water using a simple evaporation process.