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Modeling and simulation of direct production of acetic acid from cheese whey in a multi-stage membrane-integrated bioreactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
3070 149 2015 17 PDF Available
Title
Modeling and simulation of direct production of acetic acid from cheese whey in a multi-stage membrane-integrated bioreactor
Abstract

•Modeling done for a continuous and direct acetic acid production process.•Microbial reaction kinetics as well as membrane transport phenomena captured.•Model successfully predicts performance as evident in high Willmott d-index.•Modeling and simulation study will pave the way for scale up of a novel process.•Economic analysis done for the new process.

Modeling and simulation of direct and continuous production of acetic acid in a two-stage membrane-integrated hybrid reactor system was done. The total production and purification scheme involved fermentation of a cheap, renewable carbon source (cheese whey) under non-neutralizing regime in a membrane-integrated new reactor with provisions of downstream separation and recycle of microbial cells and unconverted carbon source from product acetic acid by microfiltration and nano-filtration membranes. The model attempts to capture the major governing parameters like dilution rate, cross flow rate, recycling of materials, pH along with fermentation kinetics under substrate-product inhibitions and all the associated transport phenomena of the components through micro and nanofiltration membranes. The system produced 98.6% pure acetic acid at a flux of 75 L/(m2 h) with yield of 0.98 g/g and productivity of 4.1 g/(L h). Performance of the model is well reflected in low relative error (<0.05), high Willmott d-index (d > 0.97) and high overall correlation coefficient (R2 > 0.98).

Keywords
Acetic acid; Membrane bioreactor; Growth kinetics; Transport; Bio separations; Modeling
First Page Preview
Modeling and simulation of direct production of acetic acid from cheese whey in a multi-stage membrane-integrated bioreactor
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 93, 15 January 2015, Pages 179–195
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering