Journal article
pH control structure design for a periodically operated membrane separation process
Department of Chemical and Biochemical Engineering, Technical University of Denmark1
Computer Aided Process Engineering Center, Department of Chemical and Biochemical Engineering, Technical University of Denmark2
Membrane Technology group, Department of Chemical and Biochemical Engineering, Technical University of Denmark3
A bioreactor integrated with an electrically driven membrane separation process (Reverse Electro-Enhanced Dialysis – REED) is under investigation as potential technology for intensifying lactic acid bioproduction. In this contribution the pH regulation issue in the periodically operated REED module is studied.
A methodology for control structure design is proposed to handle the dynamic system. A sensitivity analysis is used for the conceptual design of the control structure. Dynamic simulations are employed to evaluate the sensitivity index. From the analysis a periodic input-resetting control structure is selected.
The system controls pH using the imposed current density and resets the current density manipulating the hydroxide inlet concentration to the dialysate channel. The control structure is satisfactorily achieving a desired pH at the outlet of the feed channel in REED from period to period and resetting the current density.
Thus suitable performance is achieved within a large part of the operating window.
| Language: | English |
|---|---|
| Year: | 2012 |
| Pages: | 120-129 |
| ISSN: | 18734375 and 00981354 |
| Types: | Journal article |
| DOI: | 10.1016/j.compchemeng.2012.03.011 |
| ORCIDs: | Prado Rubio, Oscar Andres and Jørgensen, Sten Bay |
