Procedure and installation for the removal of arsenic and other metals from waste water by precipitation using alkaline reducing agents.

摘要

PROCEDURE AND INSTALLATION FOR REMOVING ARSENIC AND OTHER METALS IN PRECIPITATION ALKALINE WASTEWATER USING REDUCING AGENTS. PROCEDURE BASICAMENTE comprises treating the waste water with ferrous sulfate AS REDUCING AGENT IN A MIDDLE AMONIACAL WITH WHAT YOU GET A SOLUTION CLARA essentially free of AS AND OTHER METALS, WHICH precipitate as ARSENITE FERROUS BASIC or hydroxides and separated by FILTRATION. THE PROCEDURE IS SUITABLE FOR TREATING INDUSTRIAL WASTEWATER CONTAINING OF OR IN H2SO4 20% by weight and up to 20 g / L AS. The installation includes REACTOR HARMONIZATION (T-2) and provides for the use of a tower (T-4) WASH THE POSSIBLE GAS WERE NOT DISSOLVED. By this method and installation ELIMINATES AS WHAT YOU TREATED EFFLUENT MEDIOAMBIENTAL not a hazard.