Recycling. Concept and Theory of Separation for Recycling.

The separation unit, separation factor, total flow in separation system, energy requirement, and second wastes by separation for recycling system have been studied theoretically. Theoretical equationsof separation unit, and height of separation unit were introduced and it was pointed that the total flow in the separation unit was proportional inversely to the separation factor by two powers and the amount of the second waste materials is proportional to the factor. The second waste materials and the energy consumption should be considered in the aspect of the environmental assessment. The physical term and the social term have to be divided for the recycling separation more definitely than for the ordinal separation process.