Advanced oxidative coupling device and process for treating organic wastewater difficult to degrade

A technology for organic wastewater treatment and advanced oxidation, which is applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage treatment equipment, etc. It can solve the problems of lack of flexibility, low current efficiency, and poor mass transfer effect of the reactor. problems, to achieve the effect of improving removal efficiency and saving operating costs

Active Publication Date: 2015-07-22
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (publication number CN 101955280A) discloses a composite electrochemical treatment process, which electrocatalyzes the production of H 2 o 2 Fe production by reaction and microelectrolysis 2+ The reactions are in different reactors, and the electro-Fenton reaction has poor synergistic effect
Chinese patent (publication number CN 102557198A) discloses a multi-dimensional electrocatalytic reactor, which has poor mass transfer effect and is prone to concentration polarization
[0007] Although the existing advanced oxidation combination process can improve the treatment efficiency of refractory organic wastewater to a certain extent, it still has poor synergistic effect, limited mass transfer, slow free radical generation rate, low current efficiency, and lack of flexibility. However, there is no efficient coupling of each single advanced oxidation technology, which limits the industrial promotion and application

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  • Advanced oxidative coupling device and process for treating organic wastewater difficult to degrade

Examples

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Embodiment 1

[0076] Production wastewater of a pharmaceutical company, raw water COD 28200mg / L, pH value 8.5, B / C 0.11. Using an advanced oxidation coupling device and process treatment for refractory organic wastewater treatment of the present invention, the pH of the raw water is adjusted to 8.0; it enters the first ozone oxidation zone for treatment, the input amount of ozone is 8g / h, and the residence time of wastewater is 30min; Then enter the multi-dimensional electrocatalysis / micro-electrolysis area for treatment, the anode plate is coated with IrO 2 titanium plate, the cathode plate adopts a graphite plate with a purity of 99.9%, the distance between the anode plate and the cathode plate is 10cm, and the current density is controlled at 10mA / cm 2 , electrocatalytic particles and micro-electrolysis particles are mixed at a ratio of 3:1, and the residence time of the wastewater is 120min; then it enters the micro-electrolysis / Fenton zone for treatment, adding acid to adjust the pH va...

Embodiment 2

[0078] The production wastewater of a reactive dyestuff enterprise, the raw water COD 1360mg / L, pH value 9.6, B / C 0.21. Adopt an advanced oxidation coupling device and process treatment for refractory organic wastewater treatment of the present invention, adjust the pH of the raw water to 7.5; enter the first ozone oxidation zone for treatment, the input amount of ozone is 6g / h, and the residence time of wastewater is 10min; Then enter the multi-dimensional electrocatalysis / micro-electrolysis area for treatment, the anode plate is coated with TiO 2 titanium plate, the cathode plate adopts a graphite plate with a purity of 99.9%, the distance between the anode plate and the cathode plate is 20cm, and the current density is controlled at 20mA / cm 2 , electrocatalytic particles and micro-electrolysis particles are mixed at a ratio of 1:1, and the residence time of the wastewater is 30 minutes; then it enters the micro-electrolysis / Fenton zone for treatment, adding acid to adjust t...

Embodiment 3

[0080] Landfill leachate, stock solution COD 3930mg / L, pH 6.2, B / C 0.26. Using an advanced oxidation coupling device and process treatment for refractory organic wastewater treatment of the present invention, the raw water enters the first ozone oxidation zone for treatment, the ozone input is 2g / h, and the wastewater residence time is 30min; then enters the multi-dimensional electrocatalysis / The micro-electrolysis area is treated, and the anode plate is coated with IrO 2 titanium plate, the cathode plate adopts a graphite plate with a purity of 99.9%, the distance between the anode plate and the cathode plate is 5cm, and the current density is controlled at 7mA / cm 2 , electrocatalytic particles and micro-electrolysis particles are mixed at a ratio of 1.5:1, and the residence time of wastewater is 80 minutes; then enter the micro-electrolysis / Fenton zone for treatment, add acid to adjust the pH value to 3.0, and control the current density at 7mA / cm 2 , the wastewater reside...

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Abstract

The invention discloses an advanced oxidative coupling device and process for treating organic wastewater difficult to degrade. A main device body comprises an ozone oxidation-multi-dimensional electro-catalysis/microelectrolysis area, an ozone oxidation-microelectrolysis/Fenton area, a coagulation area and an inclined plate sedimentation area, wherein the ozone oxidation-multi-dimensional electro-catalysis/microelectrolysis area comprises a multi-dimensional electrolysis/microelectrolysis area at the upper part and an ozone oxidation area at the lower part; the ozone oxidation-microelectrolysis/Fenton area comprises a microelectrolysis/Fenton area at the upper part and an ozone oxidation area at the lower part. The device combines four levels of advanced oxidation systems, and electrocatalytic oxidation, ozone oxidation, Fenton oxidation and a microelectrolysis reaction are mutually coupled in function, so that an organic matter difficult to degrade is subjected to multi-level oxidation to realize complete oxidative cracking; when the device is used for treating the organic wastewater difficult to degrade, the yield and the production rate of *OH are increased, the liquid phase transfer process is accelerated, the overall current efficiency of the device is increased, operation expenses are saved, flexible regulation and control of a process unit are realized, and the device can be used for treating various kinds of organic wastewater difficult to degrade.

Description

technical field [0001] The invention relates to a device and a process for treating refractory organic wastewater by using an advanced oxidation coupling technology, and belongs to the technical field of wastewater treatment. Background technique [0002] With the rapid development of my country's industry, the types and quantities of artificially synthesized organic substances are increasing day by day, resulting in a large amount of refractory organic wastewater. The refractory organic substances contained in these wastewaters generally cannot be degraded by microorganisms, or take a long time to be degraded. Once they enter the environment, they are easy to accumulate in organisms through the food chain, and cause carcinogenicity, teratogenicity, and mutagenesis to organisms. and other hazards. At present, the most effective method for treating refractory organic pollutants in wastewater is advanced oxidation technology. Commonly used advanced oxidation technologies main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/30
CPCC02F1/46C02F1/463C02F1/4672C02F1/5209C02F1/78C02F9/00C02F2101/30C02F2201/46C02F2201/461C02F2201/46105
Inventor 刘鼎江海王丽娟
Owner AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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