Process
In nature, BioPDO is made from the fermentation of glycerol in yeast. However, DuPont has managed to engineer this glycerol functionality into a strain of Escherichia coli bacterium (hence referred to here as "E. coli"), thereby allowing industrial-scale fermentation of glycerol in a bioreactor. After the E. coli bacteria produce sufficient BioPDO product, a method to separate the BioPDO from the cellular broth that comes out of the bioreactor is needed. The separation scheme proposed by DuPont follows the following steps: microfiltration and ultrafiltration, ion exchange, flash evaporation, and distillation.
Read more about this topic: Bioseparation Of 1,3-propanediol
Famous quotes containing the word process:
“Thinking is seeing.... Every human science is based on deduction, which is a slow process of seeing by which we work up from the effect to the cause; or, in a wider sense, all poetry like every work of art proceeds from a swift vision of things.”
—Honoré De Balzac (1799–1850)
“If thinking is like perceiving, it must be either a process in which the soul is acted upon by what is capable of being thought, or a process different from but analogous to that. The thinking part of the soul must therefore be, while impassable, capable of receiving the form of an object; that is, must be potentially identical in character with its object without being the object. Mind must be related to what is thinkable, as sense is to what is sensible.”
—Aristotle (384–322 B.C.)
“... geometry became a symbol for human relations, except that it was better, because in geometry things never go bad. If certain things occur, if certain lines meet, an angle is born. You cannot fail. It’s not going to fail; it is eternal. I found in rules of mathematics a peace and a trust that I could not place in human beings. This sublimation was total and remained total. Thus, I’m able to avoid or manipulate or process pain.”
—Louise Bourgeois (b. 1911)