A device for drying and sanitising organic waste materials, comprising: • a container body for housing the waste materials to be dried and provided with an inlet for the materials to be dried and an outlet for the dried and sanitised materials, • mixing elements located in the container body and provided with at least one blade able to mix the materials to be dried and sanitised, projectingly supported by a rotating shaft, • a ventilation circuit able to generate a forced ventilation of air internally of the container body, and comprising generator means of an air flow located externally of the container body communicating with at least one dispenser nozzle located internally of the container body,wherein the rotating shaft is a hollow shaft a cavity of which is in fluid communication with the generator means of the air flow, and with the at least one dispenser nozzle which is associated to the at least one blade, characterised in that the device further comprises: • a heat exchanger (35,36) for heating the air to be blown internally of the container body; • at least one temperature sensor configured to measure a temperature internally of the container body, and • a control system which receives a signal from the at least one temperature sensor and is configured to: - verify that the temperature is within a predefined range; and - control a flow rate of the air flow injected into the container body by the ventilation circuit as a function of the signal received from the temperature sensor for maintaining the temperature internal of the container body within the predefined range. • a container body for housing the waste materials to be dried and provided with an inlet for the materials to be dried and an outlet for the dried and sanitised materials, • mixing elements located in the container body and provided with at least one blade able to mix the materials to be dried and sanitised, projectingly supported by a rotating shaft, • a ventilation circuit able to generate a forced ventilation of air internally of the container body, and comprising generator means of an air flow located externally of the container body communicating with at least one dispenser nozzle located internally of the container body,wherein the rotating shaft is a hollow shaft a cavity of which is in fluid communication with the generator means of the air flow, and with the at least one dispenser nozzle which is associated to the at least one blade, • a heat exchanger (35,36) for heating the air to be blown internally of the container body; • at least one temperature sensor configured to measure a temperature internally of the container body, and • a control system which receives a signal from the at least one temperature sensor and is configured to: - verify that the temperature is within a predefined range; and - control a flow rate of the air flow injected into the container body by the ventilation circuit as a function of the signal received from the temperature sensor for maintaining the temperature internal of the container body within the predefined range. - verify that the temperature is within a predefined range; and - control a flow rate of the air flow injected into the container body by the ventilation circuit as a function of the signal received from the temperature sensor for maintaining the temperature internal of the container body within the predefined range.