Gate to Gate
Identity ID
60ba369b-7d98-4680-808b-dff7372e496c
Process class
Associated ID
6a47c7ad-f963-44d7-a71a-237f46becc63
Included activities starts
Included activities ends
Description
Electrochemical oxidation is an efficient wastewater treatment technology that relies on passing an electric current through specific electrode materials to generate highly oxidizing species such as hydroxyl radicals (·OH), which degrade refractory organic compounds in water. This technology offers advantages including simple operation, mild reaction conditions, and absence of secondary pollution, making it suitable for treating industrial wastewater containing persistent organic pollutants (POPs). The electrochemical oxidation process mainly involves two mechanisms: direct oxidation and indirect oxidation. Direct oxidation refers to the oxidation of pollutants through direct electron loss on the anode surface, capable of transforming toxic substances into non-toxic or less toxic compounds, and even completely mineralizing them into CO2 and H2O. Indirect oxidation involves the generation of oxidants, such as active chlorine and hydrogen peroxide, via anode reactions, which subsequently react with organic compounds in wastewater to achieve oxidative degradation. The typical process flow of electrochemical oxidation technology includes three stages: pretreatment, electrolysis, and post-treatment. The pretreatment stage primarily removes suspended solids and sediments from wastewater to reduce electrode damage. The electrolysis stage is the core of the technology, where oxygen and hydrogen are generated through anodic and cathodic electrolysis, along with the formation of peroxides and other reactive oxygen species, which oxidize organic matter in wastewater. The post-treatment stage may include methods such as biological treatment to further purify the water quality.
Activity Description
Electrochemical oxidation technology uses electric current to prompt electrode materials to generate highly oxidative substances, such as hydroxyl radicals, to decompose refractory organic compounds in water. This method is simple to operate and does not cause secondary pollution, making it particularly suitable for treating industrial wastewater containing persistent organic pollutants. It destroys organic contaminants either by direct oxidation at the electrode or indirectly via oxidants generated by the electrode. The entire treatment process consists of three main steps: pre-treatment, electrolysis, and post-treatment. Initially, large particulate impurities are removed from the water, followed by decomposition of organic matter through electrolysis, and finally further purification of the water using methods such as biological treatment.
Process Description
Wastewater treatment services typically include four main aspects: pretreatment, primary treatment, secondary treatment, and tertiary treatment, ensuring the stable operation of the wastewater treatment system and compliance of the effluent water quality with regulatory standards.
Time period
2021
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
This activity represents wastewater treatment with specific technologies in a WWT plant