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US 2011/0215000 A1Published application
Process for controlling the ph and level of target ions of a liquid composition
AssigneeJurag Separation A/S
InventorsArvid Garde, Jens-Ulrik Rype
Life of this patent
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Abstract
A process for controlling the pH and level of target ions of a liquid composition, more particularly the use of Reverse Electro-Enhanced Dialysis (REED) for extraction of low-molecular, charged species generated in a reactor. Even more particularly the invention relates to a process for pH control and control of inhibitors in bioreactors.
Claims16
1-15. (canceled)
A process for controlling the pH and level of target ions of a liquid composition in a bioconversion or catalytical system, where an acidic or alkaline component is continuously produced, comprising the steps of, in either order:
- a) at least one step of passing said liquid through at least one Reverse Ejectro-Enhanced Dialysis (REED) membrane stack having:
- i) at least two ion-exchange membranes defining a first chamber for a first liquid there between;
- ii) at least two further chambers for a second liquid, each further chamber being located adjacent to the at least one first chamber;
- iii) a set of end membranes;
- and
- iv) means for applying an electric field over the membranes by means of at least two electrodes;
- and
- b) at least one step of controlling the pH and of controlling the level of target ions in said liquid composition.
5 more elements
A system comprising:
- a) at least one Anion Exchange Reverse Electra-Enhanced Dialysis (AX-REED) membrane stack having:
- i. at least two anion-exchange membranes defining a first chamber for a first liquid there between;
- at least two further chambers for a second liquid, each further chamber being located adjacent to the at least one first chamber;
- iii. a set of end membranes;
- and
- iv. means for applying an electric field over the membranes by means of at least two electrodes;
- and
- b) at least one Cation Exchange Reverse Electro-Enhanced Dialysis (CX-REED) membrane stack having:
- v. at least two cation-exchange membranes defining a third chamber for a third liquid there between;
- vi. at least two further chambers for a fourth liquid, each further chamber being located adjacent to the at least one third chamber;
- vii. a set of end membranes;
- and
- viii. means for applying an electric field over the membranes by means of at least t o electrodes;
- wherein said at least one Anion Exchange Reverse Electro-Enhanced Dialysis (AX-REED) membrane stack and said at least one Cation Exchange Reverse Electro-Enhanced Dialysis (CX-REED) membrane stack are in parallel connection.
11 more elements
Dependencies are inferred from the claim text.