Economic evaluation of preconcentration in production of ethanol from dilute sugar solutions

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T1 - Economic evaluation of preconcentration in production of ethanol from dilute sugar solutions

AU - Zacchi, Guido

AU - Axelsson, Anders

PY - 1989

Y1 - 1989

N2 - The economic feasibility of preconcentrating dilute sugar solutions prior to fermentation is investigated. Two methods, evaporation and reverse osmosis, are compared. A computer program to determine the optimal preconcentration conditions for glucose solutions of 1.5–16 wt% has been developed. It was used to compute the fractional cost for labor and maintenance, preconcentration, fermentation, and distillation. Preconcentration with evaporation resulted in a higher total cost, compared with no preconcentration, for all cases studied, although a six-effect unit was used. Reverse osmosis was found to be economically feasible for preconcentration to about 5–10 wt % depending on the concentration of the feed.

AB - The economic feasibility of preconcentrating dilute sugar solutions prior to fermentation is investigated. Two methods, evaporation and reverse osmosis, are compared. A computer program to determine the optimal preconcentration conditions for glucose solutions of 1.5–16 wt% has been developed. It was used to compute the fractional cost for labor and maintenance, preconcentration, fermentation, and distillation. Preconcentration with evaporation resulted in a higher total cost, compared with no preconcentration, for all cases studied, although a six-effect unit was used. Reverse osmosis was found to be economically feasible for preconcentration to about 5–10 wt % depending on the concentration of the feed.

U2 - 10.1002/bit.260340211

DO - 10.1002/bit.260340211

M3 - Article

C2 - 18588096

VL - 34

SP - 223

EP - 233

JO - Biotechnology and Bioengineering

JF - Biotechnology and Bioengineering

SN - 1097-0290

IS - 2

ER -