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A Continuous Flow Electrochemical Filtration System and Its Application in Degrading Ammonia Nitrogen Wastewater

A technology for chemical filtration and degradation of ammonia nitrogen, applied in the direction of electrochemical water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of incomplete denitrification of ammonia nitrogen wastewater, and achieve low cost of raw materials and preparation , strong stability, easy to obtain raw materials

Active Publication Date: 2022-05-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the problem of incomplete denitrification in the treatment process of existing ammonia nitrogen wastewater

Method used

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  • A Continuous Flow Electrochemical Filtration System and Its Application in Degrading Ammonia Nitrogen Wastewater
  • A Continuous Flow Electrochemical Filtration System and Its Application in Degrading Ammonia Nitrogen Wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 50mg Ti 4 o 7 Add 50mL of ultrapure water, and ultrasonically probe for 1h, and the evenly dispersed Ti 4 o 7 Suction filter onto PTFE support membrane, Ti 4 o 7 Film is too thin. Take 150mg Ti 4 o 7 Add 50mL of ultrapure water, and ultrasonically probe for 1h, and the evenly dispersed Ti 4 o 7 Suction filtration onto the PTFE support membrane, after freeze-drying, the measured resistance is about 30kΩ, which is too large. Take 100mg Ti 4 o 7 Add 50mL of ultrapure water, and ultrasonically probe for 1h, and the evenly dispersed Ti 4 o 7 Suction filtration onto the PTFE support membrane, after freeze-drying, the measured resistance is about 10kΩ, which is too large. Take 100mg Ti 4 o 7 Add 50mL of ultrapure water to 5mg of acidified CNT, and ultrasonically probe for 1h, and the evenly dispersed Ti 4 o 7 Suction filtration onto the PTFE support membrane, after freeze-drying, the measured resistance is about 100Ω, and the conductivity is very good. Th...

Embodiment 2

[0029] Take 100mg Ti 4 o 7 Add 50mL of ultrapure water to 5mg of acidified CNT, and ultrasonically probe for 1h, and the evenly dispersed Ti 4 o 7 Suction filter onto PTFE support membrane. Prepared Ti 4 o 7 The membrane acts as the anode in electrochemical filters.

[0030] Take 100 mL each of palladium chloride (2 mM), copper sulfate pentahydrate (4 mM), and hydrochloric acid (0.1 M) in the same beaker for 15 min and mix them evenly; in the three-electrode system, use Ni foam as the working electrode and Pt as the counter electrode electrode, and saturated Ag / AgCl as a reference electrode were immersed in the mixed solution together, and the electrodeposition experiment was carried out under the condition of the applied potential of -1.0V vs.Ag / AgCl, and the prepared Pd / Cu modified Ni foam Cathode in chemical filter.

[0031] Controlling the anode potential at 1.5V vs.Ag / AgCl, pH 7, initial concentration of Cl- at 0.1mol / L, controlling the flow rate from 1 to 4mL / min, t...

Embodiment 3

[0033] Anode Ti 4 o 7 The preparation method of thin film and cathode Pd / Cu modified Ni foam is the same as that of Example 2. Add 30mL of ammonia nitrogen wastewater with 0.175g of sodium chloride through the electrochemical filter device and return to the original beaker, and then re-enter the filter device for circulation filtration; add 30mL of ammonia nitrogen wastewater with 0.175g of sodium chloride through the electrochemical filter device and drip into a new beaker for a single filtration experiment; add 0.175g of sodium chloride to 30mL of ammonia nitrogen wastewater for a batch experiment. Control the anode potential at 2.5Vvs.Ag / AgCl, the pH is 7, [Cl - ] The initial concentration is 0.1mol / L. Such as figure 2 As shown, the removal rate of ammonia nitrogen in a single filtration experiment after 1.5 hours of reaction was 11.8%, the removal rate of ammonia nitrogen in a batch experiment was 63.6%, and the removal rate of ammonia nitrogen in a circulation filtra...

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Abstract

The invention discloses a continuous flow electrochemical filtration system and its application in degrading ammonia nitrogen wastewater. The continuous flow electrochemical filtration system includes an anode and a cathode, and it is characterized in that the anode uses Ti 4 o 7 The cathode is made of Pd / Cu modified Ni foam, and a layer of PTFE base film is provided on the opposite side of the anode and the cathode, and the side of the anode is the water inlet, and the side of the cathode is the water outlet. There is an Ag / AgCl reference electrode; the anode and the cathode are respectively connected to the positive pole and the negative pole of the power supply through a current collector. The invention adopts an improved method combining membrane separation and electrochemical technology, and is carried out in a continuous flow operation mode. In this system, convective enhanced mass transfer can significantly enhance the transfer process of target pollutant molecules to the active sites on the membrane surface, which has the advantages of easy control and scalability, and is expected to realize engineering applications.

Description

technical field [0001] The invention relates to a Ti-based 4 o 7 The anode continuous flow electrochemical filtration system and its application in degrading ammonia nitrogen wastewater belong to the technical field of water treatment. Background technique [0002] With the rapid development of the economy and the improvement of living standards, the discharge of nitrogen-containing compounds has increased sharply. Ammonia nitrogen has brought great pressure to the water environment of our country, which has attracted widespread attention from all walks of life. When the concentration of ammonia nitrogen is too high, it will consume a large amount of oxygen in the water, resulting in eutrophication of the water body and the death of aquatic organisms, and also has adverse effects on human health. At present, the ammonia nitrogen wastewater treatment technologies widely used at home and abroad include ion exchange method, breakpoint chlorination method, biological method, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/46C02F1/467C02F1/76C02F1/44C02F101/16
CPCC02F1/44C02F1/46C02F1/46109C02F1/4674C02F1/4676C02F1/766C02F2001/46133C02F2001/46152C02F2101/16
Inventor 刘艳彪梅建成孙立雯彭翔李方沈忱思马春燕
Owner DONGHUA UNIV
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