[kingjacob]

Alot of companies do exactly that. Using systems like: http://www.tapbiosystems.com/

But it's not cost effective when producing millions of liters.

[doctorpangloss]

TAP Biosystems is the manufacturer of what is now called the Sartorius.

Also, if you look carefully at the Lygos website photos, you'll see the Sartorius.