Abstract
Glycerol is a renewable resource for it is formed as a byproduct during biodiesel production. Because of its large volume production, it seems to be a good idea to develop a technology that converts this waste into products of high value, for example, to 1,3-propanediol (1,3-PD). We suggested an enzymatic bioconversion in a membrane reactor in which the NAD coenzyme can be regenerated, and three key enzymes are retained by a 10-kDa ultrafilter membrane. Unfortunately, some byproducts also formed during successful glycerol to 1,3-PD bioconversion runs, as we used crude enzyme solution of Klebsiella pneumoniae. To study the possibilities to avoid this byproduct formation, we built a mathematical description of this system. The model was also used for simulation bioconversions of high glycerol concentration with and without elimination of byproduct formation and of continuous operation.
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