Spanish to English Medical Medical: Pharmaceuticals capsule manufacture

I have a set of manufacture instructions for pharmaceutical capsules. There are no full sentences to provide context, but I will give all the instructions containing "recuperaciones"

Very first step of the procedure:
1. Procesado de RECUPERACIONES
1.3 ... Tamizar por 30 mallas, mezclar con RECUPERACIÓN en polvo

2. Preparación de la fórmula
2.3 Adicionar al mezclador - [excipiente] - [excipiente] - La RECUPERACION (si la hubiese)

RECUPERACIÓN aprovechable ........ kg
RECUPERACIÓN no aprovechable ....... kg

Is it simply mixture made up from the previous batch? (in which case, how would I say it?) Or am I completely missing the point?


TIA, MJ