Anionic organic polyelectrolyte in emulsion.The product is used for the treatment of wastewater and sludge of organic and inorganic origin, for the treatment of process water of all industries, in mechanical filtration-dewatering processes (filter presses, belt presses, centrifugal presses, etc.), preconcentration of biological sludge to be sent to anaerobic digestion processes, as a flocculant in the treatment of clarified flocculation (flotation, etc.). The use of this polyelectrolyte provides an increase in sedimentation rate, improves the clarified content, reduces filtration time by increasing the production of dewatered sludge, increases the dryness of dewatered sludge, improves the clarity of the filtrate.