Making a bio-de-icer from grass juice turned out not to yield the sustainability gain that we had expected. When pressing, less grass juice came out of the grassfibers than we had expected, about 150 m3 from 90 tons of grass while we had assumed twice as much.
Several filtration steps were needed to get the grass juice clean enough to process into bio-de-icer. The filtration equipment required a lot of electricity and manual labor. Power consumption in particular has had a negative impact on the sustainability gains we had in mind.
Finally, there was only a minimal saving of salt usage. Although grass juice naturally contains a variety of different minerals/salts, even after concentration through ElectroDialysis it was still necessary to add extra NatriumChloride.