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Process for removing low-boiling-point organic matters in high-concentration wastewater

A technology for high-concentration wastewater and organic matter, applied in the fields of water pollutants, energy wastewater treatment, water/sewage multi-stage treatment, etc. The effect of concentration, increasing flux, and speeding up filtration

Active Publication Date: 2022-05-27
JIANGSU WATER BUSINESS DOCTOR ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some enterprises have no choice but to dilute a large amount of water to the discharge standard, which is not compliant, environmentally friendly and a waste of resources. Moreover, the traditional treatment method often uses evaporation and concentration technology, which requires repeated evaporation to meet the discharge standard, which is time-consuming and labor-intensive, and the treatment efficiency is low. Therefore, the present invention uses ozone oxidation, ultrasonic pressure swing adsorption and membrane osmosis to treat high-concentration wastewater, effectively removes low-boiling organic matter, reduces wastewater concentration, and meets discharge standards

Method used

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  • Process for removing low-boiling-point organic matters in high-concentration wastewater
  • Process for removing low-boiling-point organic matters in high-concentration wastewater

Examples

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Effect test

Embodiment 1

[0037] A process for removing low-boiling organic matter in high-concentration wastewater mainly comprises the following process steps:

[0038] (1) Dispose of high-concentration wastewater at 2.5m 3 / h into the ozone generator, the air flow rate is 450mL / min, the reaction temperature is 30°C, the gas phase ozone concentration is 55mg / mL, after staying for 160min, placed at room temperature for 24h to obtain pretreated wastewater;

[0039] (2) Disperse activated carbon in a hydrogen peroxide solution with 21 times the mass of activated carbon. The mass ratio of hydrogen peroxide and deionized water in the hydrogen peroxide solution is 1:6.7. After stirring for 2 hours at 50 °C and 100 rpm, vacuum thermal activation at 800 °C and 100Pa for 2 hours , washed 4 times with deionized water, filtered, and dried at 80 °C for 1 h to obtain pretreated activated carbon;

[0040] (3) place the pretreated waste water in a closed heating container, the top of the closed heating container i...

Embodiment 2

[0049] A process for removing low-boiling organic matter in high-concentration wastewater mainly comprises the following process steps:

[0050] (1) The high-concentration wastewater is 3.1m 3 / h into the ozone generator, the air flow rate is 480mL / min, the reaction temperature is 33°C, and the gas phase ozone concentration is 58mg / mL. After staying for 188min, it is placed at room temperature for 25.5h to obtain pretreated wastewater;

[0051] (2) Disperse the activated carbon in a hydrogen peroxide solution with a mass of 22 times the activated carbon. The mass ratio of hydrogen peroxide and deionized water in the hydrogen peroxide solution is 1:6.7. After stirring for 1.5 hours at 57 °C and 170 rpm, vacuum thermal activation at 861 °C and 120Pa for 2.5 After h, washed 6 times with deionized water, filtered, and dried at 80 °C for 2 h to obtain pretreated activated carbon;

[0052] (3) place the pretreated wastewater in a closed heating container, the top of the closed heat...

Embodiment 3

[0061] A process for removing low-boiling organic matter in high-concentration wastewater mainly comprises the following process steps:

[0062] (1) Dispose of high-concentration wastewater at 3.5m 3 / h into the ozone generator, the intake flow rate is 500mL / min, the reaction temperature is 35°C, the gas phase ozone concentration is 60mg / mL, after staying for 200min, placed at room temperature for 26h to obtain pretreated wastewater;

[0063] (2) Disperse the activated carbon in a hydrogen peroxide solution with a mass of 23 times the activated carbon. The mass ratio of hydrogen peroxide and deionized water in the hydrogen peroxide solution is 1:6.7. After stirring for 1 hour at 60 °C and 200 rpm, at 900 °C and 150Pa vacuum thermal activation for 3 hours , washed 7 times with deionized water, filtered, and dried at 80 °C for 3 h to obtain pretreated activated carbon;

[0064] (3) place the pretreated waste water in a closed heating container, the top of the closed heating con...

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Abstract

The invention discloses a process for removing low-boiling-point organic matters in high-concentration wastewater, and relates to the technical field of wastewater treatment. The method comprises the following steps: firstly, pretreating high-concentration wastewater by utilizing ozone oxidation, primarily degrading organic matters and converting the organic matters into low-boiling-point organic matters; then carrying out first purification treatment, firstly heating the high-concentration wastewater to vaporize low-boiling-point organic matters, and then adsorbing and degrading the vaporized low-boiling-point organic matters by utilizing ultrasonic high-pressure assisted activated carbon; carrying out secondary purification treatment, filtering by utilizing a conductive fiber membrane, and applying an electric field, so that the high-concentration wastewater reaches the discharge standard; wherein the conductive fiber membrane is prepared from polyvinylidene fluoride, dimethylacrylic acid, chlorophenylglycine, hydrazine hydrate and dialdehyde biphenyl, and has good conductivity. The removal process provided by the invention can degrade low-boiling-point organic matters and reduce the concentration of the organic matters in the wastewater, so that the wastewater reaches the discharge standard.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a process for removing low-boiling organic matter in high-concentration wastewater. Background technique [0002] In the production process of enterprises, high-concentration wastewater is often produced, and the water contains low-boiling organic impurities with high COD, as well as high-boiling substances and salts. Such wastewater enterprises are handed over to traditional hazardous waste and waste liquid disposal units, and the treatment cost is extremely high. high. Some enterprises have no choice but to dilute a large amount of water to meet the emission standards, which is not compliant and environmentally friendly and wastes resources. Moreover, the traditional treatment method often adopts the evaporation and concentration process, which requires repeated evaporation to meet the emission standards, which is time-consuming and labor-intensive, and the treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10B01D71/34B01D71/06B01D69/08B01D67/00C02F101/30
CPCC02F9/00B01D71/34B01D71/06B01D69/08B01D67/0006C02F1/78C02F1/04C02F1/44C02F2101/30Y02W10/37
Inventor 桂晨霖陆剑峰许爱猛
Owner JIANGSU WATER BUSINESS DOCTOR ENVIRONMENTAL PROTECTION TECH
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