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a fe 0 /tio 2 -Method for treating refractory organic wastewater by tourmaline catalytic ozonation

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

Active Publication Date: 2022-07-05
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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  • a fe <sup>0</sup> /tio <sub>2</sub> -Method for treating refractory organic wastewater by tourmaline catalytic ozonation
  • a fe <sup>0</sup> /tio <sub>2</sub> -Method for treating refractory organic wastewater by tourmaline catalytic ozonation

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Experimental program
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Effect test

Embodiment 1

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

[0074] Step 1: After electrolyzing the refractory organic wastewater, the COD in the wastewater is less than or equal to 400 mg / L;

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

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

[0077] Step 4: The residence time of the mixed solution of ozone microbubbles and wastewa...

Embodiment 2

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

[0081] Step 1: After coagulating and filtering the refractory organic wastewater, the COD in the wastewater is ≤ 400mg / L;

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

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

[0084] Step 4: The residence time of the mixed solution of ozone microbubbles and wastewater in ...

Embodiment 3

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

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

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

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

[0091] Step 4: The residence time of the mixed solution of ozone microbubbles and wastewater in the reactor in S...

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Abstract

The invention discloses a Fe 0 / TiO 2 ‑The method for the treatment of refractory organic wastewater by tourmaline catalytic ozonation, comprising the following steps: Step 1: Pretreatment of the refractory organic wastewater to make its COD≤400mg / L; Step 2: Adjusting the pH value of the pretreated wastewater It is 7-9; Step 3: the waste water after pH adjustment in step 2 is mixed with ozone microbubbles and pumped into a reactor equipped with an ultrasonic generator at the bottom, and the reactor has a built-in Fe 0 / TiO 2 ‑ Tourmaline catalyst, Fe in reactor 0 / TiO 2 - The mass ratio of the tourmaline catalyst to the pumped wastewater is 10-20:1000; Step 4: In step 3, the residence time of the mixed solution of ozone microbubbles and wastewater in the reactor is 10-30min. The method enables the treated water to meet the discharge standard, reduces the cost and time of water treatment, and provides a feasible solution for treating shale gas fracturing flowback fluid.

Description

technical field [0001] The invention belongs to the field of refractory organic wastewater treatment, in particular to a Fe 0 / TiO 2 - Method for treating shale gas fracturing flowback fluid by tourmaline catalytic ozonation. Background technique [0002] Shale gas is “unconventional natural gas” that occurs in natural fractures and interlayers of high-carbon mud shale or dark mud shale, and mainly exists in free and adsorption modes. At present, horizontal wells and hydraulic fracturing technology are the key technologies for shale gas development, but a large amount of fracturing flowback fluid will flow back to the surface after the hydraulic fracturing operation. These flowback liquids have huge water volume, 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, and soil, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745C02F9/08C02F9/06C02F9/04C02F1/36C02F1/461C02F1/52C02F1/66C02F1/78C02F101/30
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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