Electric catalytic combined processing method suitable for high-salinity refractory wastewater

Abstract

The invention discloses an electric catalytic combined processing method suitable for a high-salinity refractory wastewater. The method comprises the following steps: feeding processed high-salinity refractory wastewater to a desilting basin to deslit, feeding the effluent after desilting into a homogenizing pool to homogenize water; simultaneously introducing Cl2 generated in a three-dimensional electro-catalytic reactor into the homogenizing pool, and pre-oxidizing the wastewater; feeding the homogenized effluent into the electro-catalytic reactor to stay, and carrying out electric catalytic redox reaction; degrading refractory organic matters in the wastewater; and feeding the effluent of the electro-catalytic reactor into a three-stage coagulating basin, and removing SS in the wastewater by feeding a flocculating agent, so that the wastewater reaches the biochemical target or discharge target. According to the method, an electro-catalytic oxidation process and a coagulation process form an electro-catalytic combination process; the problems that a conventional electro-catalytic oxidation method is high in operation cost and high in preparation demands on electrode materials are solved; a set of electric catalytic combined processing process which is low in operation cost, simple and convenient to operate and maintain, efficient and stable in processing effect is provided for treatment of the high-salinity refractory wastewater.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to an electrocatalytic combined treatment method suitable for high-salinity refractory wastewater. Background technique [0002] In recent decades, with the rapid progress of science and technology and the rapid development of productivity, a series of environmental problems have gradually emerged along with the large-scale development of China's industry. A series of high-salt, Refractory wastewater urgently needs solutions and treatment processes. Due to the poor biodegradability of high-salt and refractory wastewater, it is difficult to treat it. Conventional biochemical treatment methods are not only difficult to operate, but also difficult to achieve standard treatment. The Advanced Oxidation Process (AOPs), developed in the 1980s, produces hydroxyl free radicals (·OH) with strong oxidizing power through the reaction, which can quickly and efficiently oxidize and degrade po...

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Problems solved by technology

Based on the principle of the reaction, this method is undoubtedly very advanced, but it is extremely immature in engineering application, regardless of the complexity of the catalytic electrode production and the difficulty of mass production, but in terms of operating costs, due to the chromaticity of sewage Generally higher, the ultraviolet light path is short, and the irradiation range is limited. In order to improve the degradation efficiency, the power of the excitation light source and the number of lamp tubes can only be increased, which increases the energy consumption of the operation, and the operation, maintenance and management are difficult, resulting in the amplification of many photocatalytic technologies. Failed to promote in application or engineering application

[0006] It can be seen that both the electro-Fenton method and the photoelectric catalytic oxidation technology can effectively treat refractory organic pollutants in sewage, but due to the difficulty in making electrode materials, it is difficult to realize mass production and high operating costs, there are few engineering applications , it is more difficult to promote

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