Apparatus and method for waste treatment

摘要

A method and apparatus for the treatment of a waste liquid, the method comprises mixing a contaminated waste liquid with an acid to form a treatment mixture and contacting the treatment mixture with a carbon-based adsorbent material to adsorb contaminant. The adsorbent is regenerated by passing an electric current therethrough to release from the adsorbent gaseous products derived from the contaminant. The apparatus comprises a reservoir 4006 for waste liquid to be treated; the reservoir comprising acid for mixing with the waste liquid. A carbon-based adsorbent material 4002 capable of electrochemical regeneration is provided in the reservoir and a means for regenerating 4008 the adsorbent by passing an electric current therethrough. An agitator distributes the carbon-based adsorbent material in waste liquid contained in the treatment reservoir. Further methods and apparatus are disclosed. Advantageously the waste liquid requiring treatment is maintained at a low pH without the need for an external dosing tank thus reducing the cost and complexity of treatment.