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Treating method of fire-fighting wastewater containing benzene series and fluoroprotein

A technology for benzene series and wastewater, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of small permeation flux, large equipment volume, high temperature resistance, etc. , to improve the treatment effect, the equipment is small in size, and the treatment effect is good.

Inactive Publication Date: 2011-11-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. At present, the micelle-enhanced ultrafiltration technology combining surfactants and ultrafiltration membranes is used, and ultrafiltration membranes perform filtration with high resistance and relatively small permeation flux. When a certain processing capacity is reached, the equipment volume is large. Therefore, it is not suitable for on-site treatment of fire fighting wastewater;
[0010] 2. The fire-fighting wastewater at the accident site has a relatively high temperature. Many organic membrane materials are not resistant to high temperatures and are easy to swell, so they are not suitable for treating fire-fighting wastewater containing organic matter.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 1g / L hydrophobic nano-silica to fire-fighting wastewater containing 0.5g / L xylene and 6% fluoroprotein, stir evenly, hydrophobic nano-silica absorbs xylene in fire-fighting wastewater;

[0032] Add 2.4mmol / L sodium dodecylbenzenesulfonate, an anionic surfactant, to the above-mentioned fire-fighting wastewater, and stir evenly. The sodium dodecylbenzenesulfonate and fluoroprotein work together to absorb the hydrophobic nano-dioxide of xylene Silicon forms micelles;

[0033] The above-mentioned fire-fighting wastewater is pumped to the membrane module and filtered under the condition of operating pressure of 0.31MPa (cross-flow filtration flow rate of 2.8m / s), and the measured flux is 290.3L / (h m 2 MPa), COD is 32mg / L, COD removal rate is 98.2%;

[0034] COD is less than 50mg / L, and the concentration ratio reaches 1:15, which can be recycled as fire extinguishing water.

Embodiment 2

[0036] Add 0.1g / L hydrophobic nano-silica to the fire-fighting wastewater containing 0.25g / L xylene and 6% fluoroprotein, stir evenly, and the hydrophobic nano-silica absorbs the xylene in the fire-fighting wastewater;

[0037] Add 0.6mmol / L sodium dodecylbenzenesulfonate, an anionic surfactant, to the above-mentioned firefighting wastewater, and stir evenly. The sodium dodecylbenzenesulfonate and fluoroprotein work together to absorb the hydrophobic nano-dioxide of xylene Silicon forms micelles;

[0038] The above-mentioned fire-fighting wastewater is pumped to the membrane module and filtered under the condition of operating pressure of 0.34MPa (cross-flow filtration flow rate of 1.4m / s), and the measured flux is 274.5L / (h m 2 MPa), COD is 45mg / L, COD removal rate is 86.4%;

[0039] COD is less than 50mg / L, and the concentration ratio reaches 1:15, which can be recycled as fire extinguishing water.

Embodiment 3

[0041] Add 0.1g / L hydrophobic nano-silica to the fire-fighting wastewater containing 0.5g / L xylene and 6% fluoroprotein, stir evenly, and the hydrophobic nano-silica absorbs the xylene in the fire-fighting wastewater;

[0042] Add 2.4mmol / L sodium dodecylbenzenesulfonate, an anionic surfactant, to the above-mentioned fire-fighting wastewater, and stir evenly. The sodium dodecylbenzenesulfonate and fluoroprotein work together to absorb the hydrophobic nano-dioxide of xylene Silicon forms micelles;

[0043] The above-mentioned fire-fighting wastewater is pumped to the membrane module and filtered under the condition of operating pressure of 0.31MPa (cross-flow filtration flow rate of 2.8m / s), and the measured flux is 196.1L / (h m 2 MPa), COD is 39mg / L, COD removal rate is 91.5%;

[0044] COD is less than 50mg / L, and the concentration ratio reaches 1:15, which can be recycled as fire extinguishing water.

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PUM

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Abstract

The invention provides a treating method of fire-fighting wastewater containing benzene series and fluoroprotein. The method is characterized by using micelle enhanced ceramic membrane microfiltration improved by hydrophobic nano-silicon oxide to treat fire-fighting wastewater on-site so as to reach the recycling purpose. Sodium dodecyl benzene sulfonate and fluoroprotein coact with hydrophobic nano-silicon oxide adsorbing the benzene series to form a micelle with an increased particle size. And the adoption of a microfiltration membrane for filtration improves the membrane penetration flux, reduces the equipment size. The COD (chemical oxygen demand) of effluent water is less than 50mg / L, so that the recycling of fire-fighting wastewater as water for extinguishment can be realized. And the heat resisting characteristic of the ceramic membrane makes the membrane suitable for fire-fighting wastewater treatment.

Description

technical field [0001] The invention belongs to the treatment of sudden accident wastewater, and in particular relates to a method for on-site treatment of fire-fighting wastewater containing benzene series and fluoroproteins by using hydrophobic nano-silica-improved micellar enhanced microfiltration to achieve the purpose of recycling. Background technique [0002] Explosion accidents and fire accidents of different scales occur every year in our country, especially in chemical industry areas where such accidents are prone to occur. After landing, it is easy to mix with leaked chemical raw materials and chemical products to form a large amount of fire-fighting wastewater. If it is not disposed of properly, it will easily cause serious water pollution accidents. [0003] The inventors disclosed by the Intellectual Property Office of the People's Republic of China in 2011 are Zhou Chijun and Lu Chaoling. The patent number is 201010546541.6. The utility model relates to a met...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/32C02F101/36
Inventor 周迟骏陈麟凤
Owner NANJING UNIV OF TECH
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