The disinfection of waste water is an important step in the treatment of drinking water and waste water. With chemical products such as hydrogen peroxide, waste water can be properly cleaned and disinfected in an environmentally friendly manner and returned to the natural water cycle. As a powerful oxidizing agent, hydrogen peroxide is used in pre-oxidation for algae control, precipitation of iron and manganese, and oxidation of many kinds of dissolved substances, both organic and inorganic. In addition, hydrogen peroxide is easily broken down into water and oxygen in biologically active wastewater. The release of oxygen can help reduce biological oxygen demand (BOD) by allowing aerobic bacteria to work more efficiently. This mechanism is particularly important in cases where there is oxygen starvation due to high biological oxygen demand/chemical oxygen demand (COD)/total organic carbon (TOC) and/or insufficient aeration. The use of peroxides is increasingly replacing chlorination as a recycling method.