Therefore, research was undertaken to substitute and supersede such chemicals with natural residue-free and environment friendly disinfestation processes. In this new process of fumigation evolved the originally packed agricultural product is exposed to pressurized CO? atmosphere. The infestation is done on the optimum condition and cycle time of few hours is required for the products which have to be fumigated. No special pre or after treatment is necessary. Products are taken to a special enclosure and the enclosure is flooded with gaseous CO2 to the required final pressure and the subsequent expansion takes place in another vessel.
By avoiding the use of the so far commonly employed poisonous gases, with a procedure of pressure disinfestations with Carbon Dioxide (CO2), the procedure is environmentally compatible and thereby eliminates the problems of residues.