The treatment process and upgrading of effluents containing metal sulfides using one step addition of amu00c8nia

摘要

"The process of treatment and rehabilitation of wastewater containing metal sulfides using one step addition of amu00c8nia".This is a process of treatment and reclamation of wastewater containing metal sulfides using one step addition of ammonia.The invention relates to a process for the treatment of effluents containing at least a metal sulfate.Characterized by the fact of understanding the steps which consist in to add at least one basis to the effluent to precipitate the metal ions in the form of metal hydroxides me ~ ~ (OH) ~ and ~.To separate the hydroxide precipitate during the stage of alkalinization of the remainder of the effluent, the effluent adding calcium hydroxide, Ca (OH) ~ 2 ~,In order to obtain the precipitation of calcium sulphate case ~ 4 ~ hydrated calcium sulfate, and separating the case ~ 4 ~ precipitate during the previous stage of the remainder of the effluent.This process allows to obtain calcium sulphate (gypsum raw white) essentially free of metal and, therefore, recoverable, as well as u00f3xi - metal hydroxides also recoverable.