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Improved double-cathode aeration-free electro-Fenton sewage treatment device and method

A dual-cathode, improved technology, applied in water/sewage treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc., can solve the problem of narrow pH range, low efficiency, and poor ferrous recycling performance. question

Active Publication Date: 2021-05-18
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the invention is to solve the existing in-situ synthesis of H in the electric Fenton sewage treatment technology 2 o 2 Problems of low efficiency, poor ferrous recycling performance and narrow pH range

Method used

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  • Improved double-cathode aeration-free electro-Fenton sewage treatment device and method
  • Improved double-cathode aeration-free electro-Fenton sewage treatment device and method
  • Improved double-cathode aeration-free electro-Fenton sewage treatment device and method

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Embodiment Construction

[0028] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] The invention proposes an improved double-cathode non-aeration electric Fenton sewage treatment device. According to an embodiment of the present invention, refer to figure 1 , the processing device includes an effective area of ​​5 cm 2 Active air diffusion cathode (1) with an effective area of ​​6cm 2 The modified carbon felt cathode (2), two effective areas are 5cm 2 Anode (3), 250mL reaction vessel (4), stirrer (5) and two DC power supplies (6);

[0030] Among them, the air active diffusion cathode (1) is connected with an anode (3) through a DC power supply to form a loop; the modified carbon felt electrode (2) and another anode (3) are connected ...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly provides an improved double-cathode aeration-free electro-Fenton sewage treatment method and device. According to the device and the method, a large amount of H2O2 can be rapidly generated in situ without aeration, meanwhile, ferrous iron is regenerated through cathode electroreduction, efficient generation of the Fenton reaction is promoted, and the device and the method can have a good pollutant removal effect on wastewater with the pH value of 3-9. The problems that aeration is needed, the ferrous cyclic regeneration performance is poor and the applicable pH range is narrow in a conventional electro-Fenton water treatment method are solved. The novel sewage treatment device provided by the invention comprises an air active diffusion cathode, a modified carbon felt cathode, an anode, a reaction container, a direct-current power supply and a stirrer. Compared with the conventional aeration-free electro-Fenton technology, the aeration-free electro-Fenton technology can improve the mineralization efficiency of pollutants by two times or more, and can be used for treating various organic wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular, the invention relates to a treatment method and device for organic wastewater. Background technique [0002] Compared with the traditional advanced oxidation process, electro-fenton is a more green and sustainable sewage treatment technology. Electro-Fenton wastewater treatment technology can generate H in situ through the oxygen reduction reaction at the cathode 2 o 2 , avoiding the storage and transportation of high concentrations of H 2 o 2 The safety hazards caused by the solution. in situ generated H 2 o 2 with added Fe 2+ The catalyst undergoes a Fenton reaction to produce strong oxidative OH to degrade pollutants, and the Fe generated by the Fenton reaction 3+ can be reduced to Fe at the cathode 2+ , thereby reducing catalyst dosage and subsequent iron slime output. Electro-Fenton sewage treatment technology has strong controllability, mild reaction condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/461C02F1/467C02F1/72C02F101/38C02F101/30C02F101/34C02F1/66
CPCC02F1/4672C02F1/46109C02F2001/46128C02F2001/46142C02F2101/345C02F2101/34C02F2101/30C02F2209/20C02F1/66C02F2101/306C02F2101/40C02F2209/06C02F2305/026C02F2305/023Y02W10/10
Inventor 周明华张齐展韩璐洁
Owner NANKAI UNIV
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