Plant and method of production of puree

A method for producing a purée from a food product, comprising the following steps:

• refining the food product up to obtaining a purée;
• de-activating the enzymes by heating the purée, in order to prevent oxidation of the purée;
• the step of de-activating the enzymes comprising the step of passing an electric current through the purée between electrodes of a first ohmic heater (31) integrated into an enzyme de-activation station (4);
• the step of de-activating the enzymes comprising a step of recirculating a part of the purée from downstream to upstream of the first ohmic heater (31) by means of a recycling system (33) from downstream to upstream of the first ohmic heater (31), for pre-heating the purée in inlet into the first ohmic heater (31);
• characterized in that it comprises the step of sterilizing the purée following the step of de-activating the enzymes, the step of sterilizing the purée comprising a step of heating the purée by passing an electric current through the purée;
• the step of de-activating the enzymes takes place in said first ohmic heater (31), the step of sterilizing the purée taking place in a second ohmic heater (41);
• the second ohmic heater (41) being part of a sterilising station (5) located downstream of the enzyme de-activation station (4);
• between the first and the second ohmic heater (31, 41) said part of the purée being collected using the recycling system (33), the recycling system (33) from downstream to upstream of the first ohmic heater (31) developing starting from a zone between the first and second ohmic heater (31, 41).