Preliminary study on the treatment of refining residue of L—lactic acid by electrolytic catalytic oxidation method

The electrolytic catalytic oxidation method can degrade high concentration organic wastewater effectively. It is a kind of APO. The CODcr of refining residue of L-lactic acid reaches 140000 mg/l, so here we make a study of treating the refining residue by this method.The results show that when the density of direct current is 280 A/m²,and if the time of electrolysis is twelve hours and the time of dispel is five days,the removal rate of CODcr can reach 98.57%,and the rate of decolour can reach 52.77%.