Apparatus for the ohmic-heating of a particulate liquid, comprising degassing means (10, 11, 12) for degassing the liquid, which is turn comprises a vacuum tank (10) and at least one sprayer (11), in order to carry out a method comprising the step of degassing the liquid by spraying it onto a vertical or sloping internal wall of a vacuum tank, in such a way that a vertical cylindrical inner region of the vacuum tank that is away from said wall and reaches the top region of the vacuum tank is substantially free of liquid. The apparatus also comprises a conduit (51) for passing the degassed liquid through an ohmic-heating unit (50), a pump (30) located between the vacuum tank and the ohmic-heating unit, a safety valve (21) arranged in parallel with the pump and a back-pressure valve (20) located after the ohmic-heating unit.
