| 摘要 |
<p>Separating multivalent ions and lactate ions from a fermentation broth comprising a multivalent ion lactate comprising introducing the broth in a first compartment limited by an anion-selective or non-selective membrane and a cathode, converting the multivalent ion to obtain a residual stream comprising the hydroxide of the multivalent ions, and transporting the lactate ion into a second compartment limited by the membrane and an anode, is new. Separation of multivalent ions and lactate ions from a fermentation broth comprising a multivalent ion lactate, involves introducing the broth having at least 0.1 mole/l multivalent ion concentration, less than 300 g/l lactate ion concentration, and other negatively charged ion of less than 10 mol.% of the lactate ion, into a first compartment of an electrodialysis or electrolysis apparatus. The compartment is limited by an anion-selective or non-selective membrane and a cathode. The multivalent ion is converted to obtain a residual stream comprising the hydroxide of the multivalent ion. The lactate is transported through the anion-selective or non-selective membrane into a second compartment limited by the anion-selective or non-selective membrane and an anode, after which the lactate ion is neutralized to lactic acid. An independent claim is also included for an electrodialysis or electrolysis apparatus for separating a fermentation broth into a residual stream comprising multivalent ions and lactate ions.</p> |
