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. Chemistry Label,Label In Chemistry,Chemistry Food Medicine Label,Chemistry Medicine Label Jiangmen Hengyuan Label Technology Co., Ltd , https://www.hylabelprinted.com