Integrated process for ethanol separation from fermented broth for low temperature applications

An integrated process for separation of an organic compound from a fermented broth, the process comprising:

• (a) feeding a degassed and pre-heated fermented broth into a broth stripper column for generating overhead vapors, wherein the broth stripper column is operated at a temperature ranging from 15 to 50° C. for a residence time ranging from 1-10 minutes;
• (b) compressing the overhead vapors obtained from an overhead of the broth stripper column with a turbofan to obtain compressed vapors at a pressure ranging from 160 to 200 mmHg;
• (c) routing demineralized water from a bottom of the broth stripper column to a falling film evaporator;
• (d) routing the compressed vapors obtained in step (b) to the falling film evaporator for heat transfer from the compressed vapors to the demineralized water for generating a stripping steam, wherein the compressed vapors are condensed to obtain a mixture of a condensed liquid and remaining vapors and wherein the stripping steam generated is routed into the broth stripper column;
• (e) routing the mixture of the condensed liquid and the remaining vapors obtained in step (d) to a broth stripper condenser for condensing the remaining vapors into a condensed liquid;
• and
• (f) collecting the condensed liquid obtained in step (d) and step (e) having 15-25 wt. % of the organic compound in a rectifier feed drum;
• and
• wherein the organic compound is selected from ethanol, propanol, butanol, acetone and iso-propyl alcohol.