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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