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GRASSA! developed a patented mobile biorefining concept, which separates grass and other green biomass in several high value products like protein fodder, grass fibers, phosphate and whey
GRASSA! developed a patented mobile biorefining concept, which separates grass and other green biomass in several high value products like protein fodder, grass fibers, phosphate and whey
The fresh green biomass, coming from local producers, is fed into the process through a hydraulic feeder (for bringing the biomass onto this feeder a fork lifter is used). Then, the biomass passes a refiner and a mechanical press to separate the liquid fraction of the biomass from the solid one. The protein in the liquid fraction is recovered by coagulation after heating up the grass juice to temperatures around 50 °C and above with a heat exchanger (the heat, a byproduct of the diesel generator that powers the mobile unit, is applied by steam injection). Subsequently, the coagulated protein is isolated from the liquid fraction by centrifugation. The outcome is the coagulated protein together with other solids like cellulose, cell membranes and chlorophyll. After sedimentation of the solid parts from the process water, the substrate is recovered and used as additive for nutrient rich fodder (Fig 4).The main products are a press cake (animal feed), a protein concentrate (suitable for feeding pigs or chickens), a high value prebiotic (fructo-oligosacchardies) and phospate fertiliser which can be extracted from the process waste water.
Grassa consider their process to be a serious game changer for the grass-to-food chain in the Netherlands and abroad. Through a natural process of pressing, heating and filtering, grass is processed into decomposed grass whose proteins are more digestible for the cow. In addition, Grassa offer high-quality grass protein as an alternative to imported soy, sugar with a prebiotic effect and minerals as a vegetable alternative to manure.
Reduces the phosphate and ammonia surplus (optimization of phosphate levels in the feed) as well as reducing the greenhouse gas emissions of CO2 and NH3 (less imports of feed and fertilizer, and reduced ammonia from manure). Furthermore, the technology relieves agricultural land, which is currently used to produce products like feed or fertilizer, that can be produced more efficiently by GRASSA!.That means e.g. soy imports from overseas can be reduced which helps protecting the local resources and ecosystems.
Farmers will be more self-sufficient by purchasing less feed and fertilizer, their income will be diversified, and more robust and unused plant and crop residues will be valorized by extending value chains.
Dairy/Beef/grassland farmers, protein customers, arable farmers, government bodies
Grass, crop residues, water plants
7
Grassa
Mechanical shredding, pressing, precipitation, filtration, drying
Protein rich whey, protein concentrate, food and feed additives, fertilizer
4 tonne/hr
Netherland
2014
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