Organic wastewater deep degradation reaction device and application

A technology of organic wastewater and degradation reaction, applied in the direction of water aeration, water pollutants, electrolytic coatings, etc., can solve the problems of low generation rate, organic wastewater treatment rate and efficiency to be further improved, and achieve small footprint, effective Facilitate degradation and improve utilization

Active Publication Date: 2021-09-03
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its O 3 Utilization and H 2 o 2 The generation rate is still low, and the treatment rate and efficiency of organic wastewater need to be further improved

Method used

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  • Organic wastewater deep degradation reaction device and application
  • Organic wastewater deep degradation reaction device and application
  • Organic wastewater deep degradation reaction device and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1.1 The preparation method of the cylindrical gas diffusion electrode is as follows:

[0065](1) Stainless steel substrate pretreatment: the cylindrical stainless steel substrate (tube diameter is 6.5cm, height is 25cm) is placed in the NaOH solution of 40% mass fraction and soaks 30min, rinses with deionized water; %H 2 SO 4 Soak in the solution at 60°C for 20 minutes, take it out and wash it; finally etch it in 20% oxalic acid solution at 90°C for 2 hours;

[0066] (2) Preparation of electrode material paste: Weigh an appropriate amount of Fe 3 o 4 Dope activated carbon and acetylene black into a beaker, add a small amount of absolute ethanol and ultrasonically stir to disperse evenly, then add an appropriate amount of PTFE emulsion with a mass fraction of 60%, and continuously stir the cohesive paste in a constant temperature water bath at 80°C. The paste is rolled into two thin slices with a thickness of 0.5mm with a laminating machine for use; wherein, Fe 3 o ...

Embodiment 2

[0074] Embodiment 2: the treatment of typical antibiotic levofloxacin simulated wastewater

[0075] The typical antibiotic levofloxacin simulated wastewater is treated with the organic wastewater advanced degradation reaction device based on the internal circulating fluidized bed of Example 1. The experimental parameters are: the reaction volume is 2.4L; the initial concentration of levofloxacin in the influent is 200mg / L; the initial pH of the solution is 7.0 ; Inlet gas phase O 3 The concentration is about 15mg / L; the gas flow rate is 0.5L / min; the current density is 10mA / cm 2 ; Electrolyte Na 2 SO 4 The concentration is 0.05mol / L. The reactor is set to operate in the continuous flow mode of operation, and the electrochemical membrane module is operated at a flux of 75L / (m 2 ·h) Operation, the hydraulic retention time is 1h. Within 1 hour of reaction time, the parent pollutant levofloxacin was completely removed, and the removal rate of TOC was 68.3%.

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Abstract

The invention relates to the field of organic wastewater degradation, in particular to a three-dimensional electrode-ozone oxidation-electro-catalytic membrane coupled wastewater treatment device and process based on a circulating fluidized bed. A fluidized bed reaction tank internally comprises a funnel-shaped inner component, a frustum, a fiber filter ball, a gas-liquid distribution plate and three coaxial inner, middle and outer cylinders; wherein the inner cylinder is an electro-catalysis membrane assembly, the middle cylinder is a gas diffusion electrode, and the outer cylinder is a stainless steel mesh; the space between the middle cylinder and the outer cylinder and the space between the middle cylinder and the inner cylinder are filled with particle electrodes; the middle cylinder is connected to the negative electrode; the inner cylinder and the outer cylinder are connected with the positive electrode; when the organic wastewater passes through the fluidized bed reactor, the mass transfer performance is good, the utilization rate of O3 and O2 is high, and the mineralization efficiency and the deep degradation effect of pollutants are greatly improved.

Description

technical field [0001] The invention relates to the field of organic waste water degradation, in particular to a waste water treatment device and process based on a circulating fluidized bed coupled three-dimensional electrode-ozone oxidation-electrocatalytic membrane. Background technique [0002] The presence of organic pollutants in wastewater from wastewater treatment plants poses a risk to the ecological environment and public health because large amounts of organic pollutants are not effectively removed by conventional biological wastewater treatment systems before being discharged into natural aquatic systems and drinking water treatment plants. In order to reduce the discharge of organic pollutants, wastewater must be treated reasonably and effectively. At present, the commonly used treatment methods for organic pollutants in wastewater include membrane technology, adsorption technology, advanced oxidation technology and photocatalytic technology. [0003] Advanced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/30
CPCC02F9/00C02F1/78C02F1/725C02F1/4672C02F7/00C02F2001/46133C02F1/44C02F1/722C02F2101/30B01D24/16C02F1/004C02F1/46114C02F2001/46142C02F2001/46166C02F2001/46171C02F2201/46115C02F2201/4619C02F2201/782C02F2209/235C02F2209/38C02F2301/063C02F2301/08C25D9/08B01D2101/00C25D9/06C25D13/04C25D13/14C25D13/20
Inventor 夏伊静冯华军叶玲马香娟代吉华严燕
Owner ZHEJIANG GONGSHANG UNIVERSITY
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