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Method for treating degradation-resistant organic wastewater through Fe<0>/TiO2-tourmaline catalytic ozonation

A technology of organic waste water and tourmaline, which is applied in oxidation water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high catalyst cost and insignificant treatment effect.

Active Publication Date: 2021-06-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies still have certain limitations, such as the high cost of the catalyst, the treatment effect is not significant, etc.

Method used

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  • Method for treating degradation-resistant organic wastewater through Fe&lt;0&gt;/TiO2-tourmaline catalytic ozonation
  • Method for treating degradation-resistant organic wastewater through Fe&lt;0&gt;/TiO2-tourmaline catalytic ozonation

Examples

Experimental program
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Effect test

Embodiment 1

[0073] a kind of Fe 0 / TiO 2 -The method for treating refractory organic wastewater by tourmaline catalytic ozonation, specifically comprising the following steps:

[0074] Step 1: After the refractory organic wastewater is electrolytically treated, the COD in the wastewater is ≤ 400 mg / L;

[0075] Step 2: adjusting the pH value of the wastewater pretreated in step 1 to 8;

[0076] Step 3: Mix the waste water adjusted by the pH value in step 2 with ozone microbubbles and pump it from the reactor 11 tangentially into the reactor with an ultrasonic generator at the bottom, and move upward in a spiral state. The reactor 11 is provided with a catalyst central cylinder 18 along the central axis, and there is Fe in it. 0 / TiO 2 -Tourmaline catalyst, Fe 0 / TiO 2 -The mass ratio of tourmaline catalyst to the wastewater in the pumped reactor is 10:1000;

[0077] Step 4: The residence time of the ozone micro-bubbles and the wastewater mixed solution in the reactor in step 3 is 20...

Embodiment 2

[0080] a kind of Fe 0 / TiO 2 -The method for treating refractory organic wastewater by tourmaline catalytic ozonation, specifically comprising the following steps:

[0081] Step 1: Coagulate and filter the refractory organic wastewater so that the COD in the wastewater is ≤ 400mg / L;

[0082] Step 2: adjusting the pH value of the wastewater pretreated in step 1 to 7;

[0083] Step 3: Mix the waste water adjusted by the pH value in step 2 with ozone microbubbles and pump it from the reactor 11 tangentially into the reactor with an ultrasonic generator at the bottom, and move upward in a spiral state. The reactor 11 is provided with a catalyst central cylinder 18 along the central axis, and there is Fe in it. 0 / TiO 2 -Tourmaline catalyst, Fe 0 / TiO 2 -The mass ratio of tourmaline catalyst to the wastewater in the pumped reactor is 20:1000;

[0084] Step 4: The residence time of the ozone micro-bubbles and the wastewater mixed solution in the reactor in step 3 is 20min.

...

Embodiment 3

[0087] a kind of Fe 0 / TiO 2 -The method for treating refractory organic wastewater by tourmaline catalytic ozonation, specifically comprising the following steps:

[0088] Step 1: After filtering the refractory organic wastewater, make the COD in the wastewater ≤ 400 mg / L;

[0089] Step 2: adjusting the pH value of the wastewater pretreated in Step 1 to 9;

[0090] Step 3: Mix the waste water adjusted by the pH value in step 2 with ozone microbubbles and pump it from the reactor 11 tangentially into the reactor with an ultrasonic generator at the bottom, and move upward in a spiral state. The reactor 11 is provided with a catalyst central cylinder 18 along the central axis, and there is Fe in it. 0 / TiO 2 -Tourmaline catalyst, Fe 0 / TiO 2 -The mass ratio of tourmaline catalyst to the wastewater in the pumped reactor is 20:1000;

[0091] Step 4: The residence time of the ozone microbubbles and the waste water mixed solution in the reactor in the step 3 is 10min.

[009...

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Abstract

The invention discloses a method for treating degradation-resistant organic wastewater through Fe<0> / TiO2-tourmaline catalytic ozonation, which comprises the following steps of 1, pretreating degradation-resistant organic wastewater to enable the COD of the degradation-resistant organic wastewater to be less than or equal to 400 mg / L, 2, adjusting the pH value of the pretreated wastewater to 7-9, 3, mixing the wastewater subjected to pH value adjustment in the step 2 with ozone microbubbles, pumping the mixture into a reactor with an ultrasonic generator mounted at the bottom, placing a Fe<0> / TiO2-tourmaline catalyst in the reactor, and controlling the mass ratio of the Fe<0> / TiO2-tourmaline catalyst in the reactor to the pumped wastewater to be (10-20): 1000, and 4, enabling the standing time of the mixed solution of the ozone microbubbles and the wastewater in the reactor in the step 3 to be 10-30 min. According to the method, the treated water reaches the discharge standard, the water treatment cost is reduced, the water treatment time is shortened, and a feasible scheme is provided for treating the shale gas fracturing flow-back fluid.

Description

technical field [0001] The invention belongs to the field of refractory organic wastewater treatment, in particular to a Fe 0 / TiO 2 -A method for treating shale gas fracturing flowback fluid by tourmaline catalytic ozonation. Background technique [0002] Shale gas is an "unconventional natural gas" that occurs in natural fractures and interlayers of high-carbon mud shale or dark mud shale, and mainly exists in the form of free and adsorption. At present, horizontal wells and hydraulic fracturing technologies are the key technologies for shale gas development, but after hydraulic fracturing operations, a large amount of fracturing flowback fluid will flow back to the surface. These flowback liquids have a huge amount of water, high chemical oxygen demand (COD), high total dissolved solids (TDS), high total suspended solids (TSS), complex water quality, and difficult treatment. Disposal of these flowback fluids will not only cause huge damage to groundwater, surface water...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F9/06C02F9/04B01J23/745C02F1/36C02F1/461C02F1/52C02F1/66C02F1/78C02F101/30
CPCC02F9/00B01J23/745C02F1/78C02F1/725C02F1/66C02F1/36C02F1/461C02F1/52C02F2209/001C02F2209/08C02F2209/06C02F2209/44C02F2305/023C02F2101/30Y02W10/37
Inventor 王兵张欢任宏洋熊明洋李永涛施斌汪佳敏宋昌伦
Owner SOUTHWEST PETROLEUM UNIV
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