1. Introduction to electrocatalytic oxidation technology
The organic wastewater treatment process mainly adopts electrocatalytic oxidation. Through electrocatalytic degradation on the electrode surface, the electrode surface can directly produce hydroxyl radicals that have no selectivity for the oxidation of organic and inorganic substances, so that the pollutants are completely mineralized and the pollutants in the oxidized water are removed, which is called the electrochemical combustion process; if the aqueous solution contains electrolytes such as Cl- and SO42- (such as sodium sulfate, chlorine, hypochlorite and chlorate, etc.), the peroxide generated catalytically oxidizes the pollutants in the water, thereby reducing the COD of the organic wastewater. This process is called the electrochemical conversion process.
The main reactions of the electrolysis process are as follows:
Anode reaction: 4OH- →O2+2HO+4e
Cathode reaction: O+HO+2e→HO-+OH
Total reaction: O+2OH→HO
The hydroxyl radicals generated by electrolysis cause the wastewater to produce secondary reactions under alkaline conditions, degrading the pollutants or directly decomposing them into CO or converting them into other simple compounds.
The types of reactions for treating wastewater in electrocatalytic oxidation reactors can be divided into direct electrolysis and indirect electrolysis.
Direct electrolysis is the process of removing pollutants from wastewater by directly oxidizing or reducing them on the electrode surface. Direct electrolysis refers to the process in which pollutants gain or lose electrons directly on the electrode surface, thereby being oxidized or reduced. At the anode, pollutants can receive electrons and be oxidized into small molecules or harmless substances that are easily biodegradable; while at the cathode, water obtains electrons to generate hydrogen and hydroxide ions, which helps to improve the alkaline environment of the system and further promote the decomposition of pollutants.
The study of electrocatalytic oxidation technology to treat organic wastewater is an important topic in the current water treatment field. This technology uses potential difference to regulate the flow of electrons, so that pollutants complete the degradation or transformation process at the electrode interface or in the solution to achieve water purification. Compared with traditional water treatment technologies, electrocatalytic oxidation technology has the advantages of cleanliness, flexibility, simplicity and controllability.
Shandong Longantai Environmental Protection Sci-tech Co., Ltd., established in 2005, focuses on energy-saving and compliant treatment of industrial wastewater, wastewater recycling and reuse, and wastewater resource and energy recovery. The company provides high-value comprehensive solutions and key equipment. It integrates research and development, manufacturing, process design, project construction, and water services operation. Longantai has strong capabilities and a complete quality system in the R&D and manufacturing of water treatment catalysts, critical water treatment equipment, wastewater resource recovery equipment, and industrial energy recovery equipment.
Longantai company provides high-value-added comprehensive energy-saving and emission reduction solutions in major technological and engineering applications such as industrial wastewater, refractory wastewater, high-salinity wastewater, high-concentration wastewater treatment, energy-saving upgrades for wastewater treatment standards, wastewater recycling and reuse, and water quality improvement for rivers and lakes. These solutions effectively improve resource utilization, reduce enterprise costs, and contribute positively to green, low-carbon, and high-quality development.
Longantai places great emphasis on the role of research and development in its growth. The company currently holds over 50 invention patents, more than 10 utility model patents, 1 design patent, 1 first prize for provincial-level scientific and technological progress, and 1 first prize for scientific and technological progress from the China Environmental Protection Industry Association. Longantai has established industry-academia-research collaborations with several top domestic and international universities and research institutions. Over the years, the company has been recognized with numerous honors, including National High-Tech Enterprise, National "Little Giant" Enterprise for Specialized and New Technology, Provincial Gazelle Enterprise, Provincial Specialized and New Technology Enterprise, Provincial Manufacturing Champion, Provincial Innovative Small and Medium-Sized Enterprise, Hidden Champion Enterprise, Provincial "One Enterprise, One Technology" R&D Center, and Provincial Industrial Design Center.
Longantai is a leading domestic provider of water treatment solutions, a manufacturer of critical water treatment equipment, and a water services operator. The projects it has served have received extensive coverage from numerous mainstream media outlets, including China Environment News, Xinhua News, Phoenix News, Sina, and various provincial TV stations.
Longantai is a collaborative and open platform with a comprehensive innovation system, mature practical technologies, and advanced manufacturing expertise. It brings together a team of passionate, responsible, grateful, and ambitious professionals. As Longantai continues to grow, it is eager to collaborate sincerely with partners worldwide, working together to contribute to the protection of the environment and the pursuit of sustainable development for humanity. With the mission of "developing energy-efficient and resource-sustainable environmental technologies and equipment for our customers," Longantai strives to fulfill its dreams and responsibilities with gratitude. With humility and dedication, the company aims to work alongside friends from all sectors to safeguard our clear waters, blue skies, and peaceful, harmonious homeland.
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