| 摘要 |
The invention relates to methods for disposing of waste, produced in an aluminium anodisation plant and containing an extremely alkaline pickling solution with a high concentration of aluminium, a slightly alkaline bath rinse with a low concentration of aluminium, an acidic used anodic oxidation product containing aluminium and optionally aluminium hydroxide slurry from neutralisation processes. Said methods can be used effectively to produce an alkaline sodium aluminate solution and an acidic aluminium solution, which as a result of their aluminium content can be used immediately in a sewage treatment plant for the precipitation of phosphate. Waste from the method for producing the alkaline product can be advantageously used in the method for producing the acidic product. By shifting the emphasis between the two methods, both the quantity of the respective waste produced and the quantity of the alkaline or acidic end product required in each case can be controlled. |
