Use of manure nutrients. Five value chains are considered in parallel in the following European countries: Spain, France, Germany, Belgium and the Netherlands. AlgaEnergy participates in the Spanish value chain. The company's tasks respond to the recovery of liquid effluent after several nutrient recovery processes carried out by the University of Vic and the Leitat technology center (solids removal, reverse osmosis processes and membrane filtration). The effluent, lacking organic matter, will be valued by AlgaEnergy for the cultivation of green microalgae.