▎ 摘　　要

NOVELTY - The drum unit comprises an electrode portion provided with an outer periphery of the drum unit, a direct current (DC) power supply, and a rotating shaft for coating graphene on a titanium plate of the DC power supply. USE - The drum unit is useful in an electro-osmotic dehydrator (claimed) for dehydrating sludge. ADVANTAGE - The affordable drum unit has excellent abrasion and corrosion resistances, so that lifetime of the drum unit can be improved, and is convenient to handle. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing a drum unit.