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:
“Rules and particular inferences alike are justified by being brought into agreement with each other. A rule is amended if it yields an inference we are unwilling to accept; an inference is rejected if it violates a rule we are unwilling to amend. The process of justification is the delicate one of making mutual adjustments between rules and accepted inferences; and in the agreement achieved lies the only justification needed for either.”
—Nelson Goodman (b. 1906)
“Any balance we achieve between adult and parental identities, between children’s and our own needs, works only for a time—because, as one father says, “It’s a new ball game just about every week.” So we are always in the process of learning to be parents.”
—Joan Sheingold Ditzion, Dennie, and Palmer Wolf. Ourselves and Our Children, by Boston Women’s Health Book Collective, ch. 2 (1978)
“come peace or war, the progress of America and Europe
Becomes a long process of deterioration—”
—Robinson Jeffers (1887–1962)