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Capacitive microbial desalination battery device and method applied to chemical tail water treatment

A microbial desalination and battery device technology, which is applied in the field of microbial desalination battery devices, can solve the problems of short service life of cathode electrodes and difficult recovery of added value salt

Active Publication Date: 2020-10-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the existing microbial desalination battery is difficult to recover the value-added salt existing in the process of chemical tail water treatment and the service life of the cathode electrode is short, the present invention is equipped with a hollow carbon fiber-carbon film capacitor cathode for chemical tail water treatment. The microbial desalination battery device and method, through the hollow carbon fiber-carbon membrane capacitively coupled traditional platinum-carbon coated catalytic cathode as the cathode, can effectively collect high value-added ions, realize the recovery of economic value salt in the tail water, and at the same time, its structure can effectively improve the efficiency of the cathode. service life

Method used

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  • Capacitive microbial desalination battery device and method applied to chemical tail water treatment
  • Capacitive microbial desalination battery device and method applied to chemical tail water treatment
  • Capacitive microbial desalination battery device and method applied to chemical tail water treatment

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Embodiment 1

[0066] Using the microbial desalination battery device of the present invention to treat the salt in the tail water of the pesticide production industry and recover the salt comprises the following steps:

[0067] Step 1. Preparation of hollow carbon fiber-carbon film capacitor electrode

[0068] Step 1: Prepare 100mL of 120g / L glucose aqueous solution at room temperature, weigh 4g of nickel acetate solid, add it to the glucose aqueous solution, stir and dissolve to obtain the precursor.

[0069]Step 2: Put the titanium-based titania nanotube array (5cm×5cm×0.5mm, the thickness of the titanium matrix is ​​0.02mm) in a two-necked flask with stoppers, with the pure titanium side facing down, one port of the flask is connected to a vacuum pump, and the other port is connected to a tool Plug the constant pressure dropping funnel, and the precursor is housed in the funnel. Vacuumize to 0.03MPa, then open the constant pressure dropping funnel, drop the precursor into the two-necked...

Embodiment 2

[0079] Using the microbial desalination battery of the present invention to process pharmaceutical intermediates to produce salt in chemical industry tail water and to recover the salt comprises the following steps:

[0080] Step 1, preparing a hollow carbon fiber-carbon film capacitive electrode, which is the same as in Example 1;

[0081] Step 2. Assembly of microbial desalination battery

[0082] Soak the anode carbon felt in the acclimated electricity-generating composite bacteria solution for more than 12 hours, then place the carbon felt in the anode chamber, and separate the anode chamber and the desalination chamber with an anion exchange membrane with a thickness of 0.25 mm; The prepared hollow carbon fiber-carbon film capacitor electrode is placed on the cathode, the capacitor layer is placed facing the desalination chamber, the catalytic layer is facing the air, and the cathode chamber and the desalination chamber are separated by a 0.25mm cation exchange membrane, ...

Embodiment 3

[0086] Using the microbial desalination battery of the present invention to integrally treat the residual organic pollutants and salt in the tail water of pesticide and chemical industry comprises the following steps:

[0087] Step 1. Preparation of hollow carbon fiber-carbon film capacitor electrode

[0088] Step 1: Prepare 100mL of 100g / L glucose aqueous solution at room temperature, weigh 2g of nickel acetate solid, add it to the glucose aqueous solution, stir and dissolve to obtain the precursor.

[0089] Step 2: Put the titanium-based titania nanotube array (5cm×5cm×0.5mm, the thickness of the titanium matrix is ​​0.02mm) in a two-necked flask with stoppers, with the pure titanium side facing down, one port of the flask is connected to a vacuum pump, and the other port is connected to a tool Plug the constant pressure dropping funnel, and the precursor is housed in the funnel. Vacuumize to 0.01MPa, then open the constant pressure dropping funnel, drop the precursor into ...

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Abstract

The invention discloses a capacitive microbial desalination battery device and method applied to chemical tail water treatment, and belongs to the technical field of water resource treatment. The battery device comprises an anode chamber, a desalting chamber and a cathode chamber which are separated by an anion exchange membrane and a cation exchange membrane respectively; the anode is made of a carbon material, and the cathode is a hollow carbon fiber-carbon film capacitor electrode formed by a hollow carbon fiber-carbon film capacitor layer, a titanium-based layer, a waterproof layer and a catalyst layer which are arranged in sequence; and the anode and the cathode are connected through an external circuit. The desalination method comprises the following steps: firstly, carrying out internal circulation on the chemical tail water in the anode chamber, connecting the anode chamber of the battery device with the desalination chamber in series after a specific retention time, enabling the water treated by the anode chamber to enter the desalination chamber, and carrying out circular treatment to remove salts and / or COD in the desalination chamber and the anode chamber. The device and the method can integrally and efficiently remove organic matters and salts in the chemical tail water and efficiently recover salts, are stable in structure and long in service life, and can be widely applied to treatment of various chemical tail waters.

Description

technical field [0001] The invention belongs to the field of water resources treatment, and in particular relates to a microbial desalination battery device and method equipped with hollow carbon fiber-carbon film capacitor electrodes, which are applied to chemical tail water treatment. Background technique [0002] Chemical tail water refers to the discharged wastewater that has been treated by the centralized sewage plant in the chemical industry park to meet the first-class B discharge standard of urban sewage or the discharge standard of local chemical enterprises. The residual salt is an important reason for inhibiting its recycling and resource utilization. At present, due to the high cost of tail water treatment, my country's recycled water is mainly used in low-end recycling sections such as cooling cycles. Therefore, it is of practical research and application significance to effectively remove part of the salt in water at low cost and low energy consumption, and it ...

Claims

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Application Information

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IPC IPC(8): H01M8/16C02F3/34
CPCC02F3/34H01M8/16Y02E60/50
Inventor 魏卡佳王祎韩卫清王连军沈锦优李健生孙秀云
Owner NANJING UNIV OF SCI & TECH
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