The advanced oxidation technology experimental device for sewage treatment has become a research hotspot in the field of water treatment by generating strong oxidative free radicals to achieve efficient decomposition of recalcitrant organic matter. According to the reaction mechanism and device characteristics, it can be mainly divided into the following three categories:

1、 Chemical oxidation experimental apparatus

Using the Fenton oxidation system as the core, hydrogen peroxide is catalyzed by ferrous ions to generate hydroxyl radicals, which disrupt the molecular structure of organic compounds. Typical devices include homogeneous Fenton reactors and heterogeneous Fenton reactors. The former uses a mixture of ferrous sulfate solution and hydrogen peroxide, which is suitable for treating low pH wastewater; The latter, through solid catalysts such as iron-based composite materials, breaks through pH limitations and maintains 90% catalytic activity under pH=6 conditions. Experimental data shows that this technology can achieve a removal rate of 98% for phenol wastewater, but there are problems such as high iron sludge production and high operating costs.

2、 Electrochemical catalytic oxidation experimental device

By relying on the oxidation-reduction reactions occurring on the electrode surface, organic pollutants can be directly degraded. The three-dimensional electrode reactor increases the specific surface area and improves mass transfer efficiency by filling particle electrodes. Experiments have shown that when treating leachate with COD exceeding 8000mg/L, energy consumption is reduced by 22% compared to two-dimensional electrodes at a current density of 15mA/cm ². Boron doped diamond electrodes, with a service life of 8000 hours, have become suitable for high concentration wastewater treatment, but their high preparation costs limit their large-scale application.

3、 Experimental apparatus for photocatalysis and ozone oxidation

The photocatalytic device utilizes semiconductor materials such as titanium dioxide to absorb ultraviolet light, generating electron hole pairs to decompose organic compounds. The degradation efficiency of tetracycline by carbon nitride/graphene oxide composite catalyst under visible light is 40% higher than that of traditional titanium dioxide. The ozone oxidation device directly oxidizes or catalyzes the generation of hydroxyl radicals through ozone molecules. A certain water plant uses an ozone activated carbon combination process to reduce the concentration of organic matter in the effluent by 65%. The new ozone advanced catalytic oxidation device (CDOF) integrates cyclone air flotation technology, achieving a COD removal rate of over 90% and reducing sludge volume by more than 90%.