Characterisation of disperse systems (porosity, surface, shape and particle size, densities). Processes for increasing surfaces (crushing, grinding, physical laws, phenomenological laws). Processes for decreasing surfaces (agglomeration of particles, briquetting and pelleting). Separation processes for disperse systems (solid-liquid, solid-gas, screening, grading, thickening, filtration and dust removal). The processes of mixing (solid-solid, solid-liquid, liquid-liquid), sampling and storage of scattered materials.