I decided to try to record the glycerin fallout in a batch of bio the instant the mixer pump is shutoff. What you will see in this short clip is the clear return hose that returns bio from the bottom of the reactor to the top. This 200L batch has been mixing for 3 1/2 hours, and the 5% prewash has been done. Once I unplug the pump, the bio will settle back down in the clear hose, and with a flashlight shining through, you will be able to see the glycerin immediately start dropping out, leaving nice golden bio. (Sorry about quality- shot with digital camera in video mode)