Biological oxidation pretreatment process, the biological oxidation is the main target of pyrite, pyrrhotite and arsenopyrite. These components of the complex minerals, and containing a variety of other elements (see Table 8-1), and therefore, in the biological oxidation process, a large amount of metal ions or metalloid ions, these ions or ions directly into solution The state is present in the solution or is present in the solution in a new stable state after reaction in solution. Therefore, a key issue in the biooxidation pretreatment process is the treatment of oxidized waste liquid, especially the arsenic ions contained therein, which are highly toxic and have a great impact on the environment. All countries in the world have strict emission of arsenic-containing wastewater. standard. Since the solution after biooxidation is strongly acidic, the oxidizing waste liquid can neither be directly discharged nor directly used, and therefore must be treated. Polybag,Self-Adhesive Polybag,Pe Pp Poly Bags,Clear Poly Bags Dongguan Sun Pak Packing Product Ltd. , https://www.dgsunpack.com