Electrocatalytic oxidation system for waste water treatment

Abstract

The invention discloses an electrocatalytic oxidation system for waste water treatment. The system comprises a pre-treatment pond, a water inflow pump, an electrocatalytic oxidation pond, a stable filtering pond, a mixed reactor pond and a bio-degradosome pond, wherein aeration pipes are arranged on the top of the stable filtering pond, at the bottom of the electrocatalytic oxidation pond and in abio-filtering pond, and a back washing water pipe is further arranged on the top of the electrocatalytic oxidation pond for washing electrodes. A solution can be fully stirred through aeration, thus,concentration polarization is reduced, the corrosion degree of polar plates is relieved, the cost is reduced, a large amount of oxygen is provided for electrocatalysis, organic matter difficult to degrade can be completely decomposed, and the biodegradability is improved to a larger degree. The polar plates of an electrocatalytic oxidation device are washed and subjected to dirt removal through aback washing pipe back washing device, corrosion damage is reduced, the service life is prolonged, the treatment efficiency is improved, and therefore the effects of reducing the energy consumption and the invested cost are achieved.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a system and method for electrocatalytically oxidizing polymer-containing wastewater. Background technique [0002] Electrocatalytic oxidation technology is an advanced oxidation treatment technology, especially for high-salt refractory sewage. It produces strong oxidizing groups on the electrode surface, such as · OH, · ClO, · ClO 2 etc., can completely mineralize the refractory pollutants in the water phase, and realize the rapid and effective removal of pollutants. Therefore, the use of electrocatalytic oxidation technology in the treatment of high-salt refractory wastewater has great technical advantages, but at the same time there are some problems, mainly in the following aspects: 1 The oxidation and removal of pollutants is not complete, especially for some macromolecules that are refractory to degradation Organic matter, after ring opening and chain breaking, becomes ...

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Problems solved by technology

Therefore, the use of electrocatalytic oxidation technology in the treatment of high-salt refractory wastewater has great technical advantages, but at the same time there are some problems, mainly in the following aspects: 1 The oxidation and removal of pollutants is not complete, especially for some macromolecules that are refractory to degradation Organic matter, after ring opening and chain breaking, becomes a small molecular substance with a more stable structure, but it is difficult to completely mineralize it into carbon dioxide and water; 2 As the concentration of organic pollutants in wastewater decreases, the electrolysis efficiency decreases significantly, and energy 3. Polymerized wastewater often contains a large amount of chlorinated organic matter. After advanced oxidation treatment, the structure is more stable, and some organic matter has certain toxicity, which is not conducive to biodegradation; 4. When nitrogen and phosphorus in sewage When the standard is exceeded, the pure electrocatalytic oxidation process is difficult to meet the treatment technical requirements; 5. After the equipment is working, the accumulation of pollution on the plate increases and the corrosion is serious, which will affect the life and efficiency of the equipment.

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