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Method for removing organic matters in shale gas wastewater

A technology for shale gas and organic matter, applied in water pollutants, mining wastewater treatment, chemical instruments and methods, etc., can solve the problems of complex process and poor removal of organic matter.

Pending Publication Date: 2021-08-20
刘百仓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is complicated, and activated carbon is mainly used for adsorption and filtration treatment, which is not effective in removing organic matter.

Method used

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  • Method for removing organic matters in shale gas wastewater
  • Method for removing organic matters in shale gas wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] What embodiment adopts is Sichuan Weiyuan shale gas waste water, and concrete steps are as follows:

[0056] (1) Wastewater directly enters the coagulation sedimentation tank, the dosage of polyaluminum chloride is 100mg / L, and the dosage of polyacrylamide is 0.5mg / L; 200 rpm fast stirring for 2 minutes, 40 rpm slow speed Stir for 10 minutes and settle for 20 minutes.

[0057] (2) The effluent from step (1) enters the ozone oxidation tank for further treatment, the ozone dosage is 100 mg / L, and the reaction time is 60 minutes.

[0058] (3) The effluent from step (2) enters the biofilm-membrane bioreactor device for further treatment. The type of carrier in the reactor is a polyurethane square with a side length of 1cm, the filling rate is 20%, DO is controlled at 4-6mg / L, hydraulic The residence time is 48 hours, and the solid residence time is 30 days. The ultrafiltration membrane is polyvinylidene fluoride (PVDF) hollow fiber membrane, and the ultrafiltration flux is...

Embodiment 2

[0063] What embodiment adopts is Sichuan Weiyuan shale gas waste water, and concrete steps are as follows:

[0064] (1) Wastewater directly enters the coagulation sedimentation tank, the dosage of polyferric chloride is 40mg / L, and the dosage of polyacrylamide is 0.1mg / L; 200 rpm fast stirring for 2 minutes, 30 rpm slow speed Stir for 10 minutes and settle for 10 minutes.

[0065] (2) The effluent from step (1) enters the ozone oxidation tank for further treatment, the ozone dosage is 150 mg / L, and the reaction time is 60 minutes.

[0066] (3) The effluent from step (2) enters the biofilm-membrane bioreactor device for further treatment. The carrier type in the reactor is a polystyrene block with a side length of 1 cm, the filling rate is 40%, and DO is controlled at 4-6 mg / L , The hydraulic retention time is 12 hours, the solid retention time is 12 days, the ultrafiltration membrane is a polyvinylidene fluoride (PVDF) hollow fiber membrane, and the ultrafiltration flux is 30...

Embodiment 3

[0072] What embodiment adopts is Sichuan Weiyuan shale gas waste water, and concrete steps are as follows:

[0073] (1) Waste water directly enters the coagulation sedimentation tank, the dosage of polyferric chloride is 300mg / L, and the dosage of polyacrylamide is 1mg / L; 200 rpm fast stirring for 2 minutes, 40 rpm slow stirring 10 minutes, precipitation 20 minutes.

[0074] (2) The effluent from step (1) enters the ozone oxidation tank for further treatment, the ozone dosage is 200 mg / L, and the reaction time is 60 minutes.

[0075] (3) The effluent from step (2) enters the biofilm-membrane bioreactor device for further treatment. The carrier type in the reactor is a polyvinyl chloride square with a side length of 1cm, the filling rate is 15%, and DO is controlled at 4-6mg / L , The hydraulic retention time is 24 hours, the solid retention time is 15 days, the ultrafiltration membrane is a polyvinylidene fluoride (PVDF) hollow fiber membrane, and the ultrafiltration flux is 30...

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Abstract

The invention relates to a method for removing organic matters in shale gas wastewater, and belongs to the technical field of industrial wastewater treatment. The technical problem to be solved by the invention is to provide the method for removing the organic matters in the shale gas wastewater. The method comprises the steps of a, adding a coagulant and a coagulant aid into the shale gas wastewater, mixing, stirring and precipitating, and taking clear liquid; b, guiding the clear liquid into an ozone oxidation unit for treatment; and c, introducing the effluent treated in the step b into a biological membrane-membrane bioreactor for treatment. The method is simple in technological process and high in adaptability to water quality changes. By adopting coagulation and ozone oxidation, suspended matters and part of organic pollutants in water are removed, and the biodegradability and subsequent biological treatment effect of the shale gas wastewater can be improved. The biological membrane-membrane bioreactor is adopted, organic pollutants in the shale gas wastewater are degraded by utilizing microorganisms, and an ultrafiltration membrane is used for filtering, so that the water quality is further optimized. According to the method, the organic pollutants in the shale gas wastewater can be efficiently removed.

Description

technical field [0001] The invention relates to a method for removing organic matter in shale gas wastewater, belonging to the technical field of industrial wastewater treatment. Background technique [0002] With the depletion of traditional fossil energy sources, obtaining new energy sources has become very urgent. As an emerging alternative energy source, shale gas has received extensive attention. Shale gas is an important unconventional natural gas resource. Its development has the characteristics of long production cycle, long mining life and large gas-bearing area. It has abundant resource reserves in the world. Although the application of horizontal drilling and hydraulic fracturing technology has greatly increased the production of shale gas, hydraulic fracturing technology has allowed a large amount of flowback fluid and produced water to return to the ground. These shale gas wastewater has the characteristics of complex water quality components, high salinity, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30C02F103/10
CPCC02F9/00C02F1/5236C02F1/56C02F1/78C02F2001/007C02F3/1268C02F2101/30C02F2103/10C02F1/444
Inventor 刘百仓白玉华刘馨钰
Owner 刘百仓
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