In an embodiment, a device for processing adipose tissue comprises:a. a rotatable chamber having a longitudinal axis around which the rotatable chamber is arranged to be rotated, and a first end and a second end, with a side wall extending therebetween, wherein said first end has a diameter smaller than a diameter of said second end, the rotatable chamber comprising within:i. a fiber collector；ii. a first outlet at a first radial distance from said longitudinal axis；iii. a screen projecting from the second end and configured to restrict the passage of a constituent of adipose tissue therethrough, wherein the screen meets the second end at a second radial distance from the longitudinal axis, and wherein the second radial distance is less than the first radial distance；b. a drive unit configured to rotate the rotatable chamber about the longitudinal axis, thereby producing a centrifugal field, whereupon when a sample of adipose tissue is present in the rotatable chamber, the sample stratifies into at least two constituent layers as a function of the differing specific gravities of the constituents.
