Photo-catalysis process applied in eliminating recalcitrant compounds in industrial residual waters

摘要

The present invention relates to the application of a heterogeneous photocatalysis process for the treatment of industrial wastewater contaminated with recalcitrant compounds and the operating conditions of a pilot plant for implementing said process.

主权项

1. A photo-catalysis process for decontamination of waters contaminated with recalcitrant substances comprising:
a) transporting residual water contaminated with recalcitrant substances to a recirculation tank; b) adding a catalyst composed of 75% anatase and 25% rutile to said recirculation tank; c) transporting the residual contaminated water and catalyst from the recirculation tank to a collector system; d) recirculating the residual contaminated water through the collector system until the recalcitrant substances are decreased as measured by reduction of chemical oxygen demand (COD) of the residual contaminated water to 25 to 35% of its starting value to yield residual decontaminated water; e) sedimenting the catalyst from the residual decontaminated water contained in said recirculation tank to yield residual decontaminated water without catalyst; and f) transporting a portion of the residual decontaminated water without catalyst from the recirculation tank to a storage tank.