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Method for deeply treating difficult-to-degrade organic wastewater

A technology for advanced treatment of organic wastewater, applied in the field of environmental engineering, can solve the problems of not considering the removal of organic matter in electroplating wastewater, not introducing wastewater recycling and standard discharge, and poor reaction treatment effect, so as to improve biodegradability and operation And the effect of low maintenance cost and reducing the cost of wastewater treatment

Inactive Publication Date: 2018-11-13
北京科瑞博远科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process is suitable for low-concentration electroplating wastewater. The COD in the wastewater is usually lower than 300mg / L. Under the action of microwaves, the impurities in the wastewater and the catalyst are combined to produce a large amount of solid waste, and the operating cost is high.
Chinese patent 201010126411.7 discloses a microwave hydrothermal ferrite treatment method for electroplating waste water and pickling waste liquid, using electroplating waste water and pickling waste liquid as raw materials, using NaOH as a regulator, and obtaining iron ferrite under microwave hydrothermal conditions. Oxygen is used as a magnetic material to realize the resource utilization of metal ions in electroplating wastewater and pickling wastewater. The removal of organic matter in electroplating wastewater is not considered, and the recycling and standard discharge of treated wastewater are not introduced.
Its microwave catalytic oxidation device contains ferrous oxide and hydrogen peroxide, mainly using microwave-enhanced Fenton reaction, the reaction treatment effect is poor, and a large amount of sludge is generated, and then electrodialysis treatment is required, and the treatment cost is high

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  • Method for deeply treating difficult-to-degrade organic wastewater

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a method for the advanced treatment of maleic anhydride wastewater. The maleic anhydride wastewater used is biochemically treated maleic anhydride wastewater provided by Puyang Shengyuan Petrochemical Co., Ltd., and its physical and chemical properties are: pH value is 6- 7. COD is 810mg / L, which belongs to refractory organic chemical wastewater. The treatment process is as follows:

[0035] Catalyst preparation, weigh 0.5mol / L copper nitrate trihydrate solution. Pass the prepared copper nitrate solution from the upper part of the microwave reactor, and the flow rate is controlled at 1-2BV / h. After passing through, continue to pass through 200ml of water and soak for 1 hour. Empty the water in the reactor, and then blow it dry with air. Turn on the microwave, adjust the power to 1000W, switch on and off for 60 seconds, and process for 2 minutes. Stop the microwave and reduce the nitrogen flow until the temperature drops to room temperature. ...

Embodiment 2

[0042] This example provides a method for advanced treatment of wastewater from an antibiotic pharmaceutical industry. The physical and chemical properties of the wastewater are: pH 6-7, COD 352 mg / L, which belongs to refractory organic chemical wastewater. Including the following steps:

[0043] Catalyst preparation, weigh 0.3mol / L copper nitrate trihydrate solution. Pass into the prepared copper nitrate solution from the upper part of the reactor, and the flow rate is controlled at 1-2BV / h. After passing through, continue to pass through 200ml of water and soak for 1 hour. Empty the water in the reactor, and then blow it dry with air. Turn on the microwave, adjust the power to 1000W, switch on and off for 60 seconds, and process for 2 minutes. Stop the microwave and reduce the nitrogen flow until the temperature drops to room temperature.

[0044] S1: The biochemically treated pharmaceutical wastewater passes through the grille, sump, etc., to remove the suspended matter...

Embodiment 3

[0050] This embodiment provides a method for advanced treatment of coking wastewater. The physical and chemical properties of the wastewater are 335.5 mg / L COD and 720 chroma, which belong to refractory organic chemical wastewater. Including the following steps:

[0051] Catalyst preparation, weigh 0.8mol / L copper nitrate trihydrate solution. Pass into the prepared copper nitrate solution from the upper part of the reactor, and the flow rate is controlled at 1-2BV / h. After passing through, continue to pass through 200ml of water and soak for 1 hour. Empty the water in the reactor, and then blow it dry with air. Turn on the microwave, adjust the power to 1000W, switch on and off for 60 seconds, and process for 2 minutes. Stop the microwave and reduce the nitrogen flow until the temperature drops to room temperature.

[0052] S1: The galvanized wastewater after flocculation and precipitation is filtered to remove solid impurities;

[0053] S2: The flow rate of waste water i...

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Abstract

The invention discloses a deep treatment technology of difficult-to-degrade organic wastewater and belongs to the technical field of environmental engineering. The deep treatment technology comprisesthe following steps: removing suspended matters from wastewater subjected to biochemical treatment; mixing the wastewater without the suspended matters and an oxidant; after mixing, conveying a mixture into a microwave reactor filled with a catalyst; enabling organic matters in the wastewater to react with the oxidant under a synergistic effect of microwaves and the catalyst; precipitating and filtering the reacted wastewater to realize up-to-standard emission. According to the method disclosed by the invention, the biodegradable possibility of the difficult-to-degrade organic wastewater is improved, the cost of treating the wastewater is reduced, the pollution to the environment is reduced and the emission standards are realized. The advantages of the microwaves are utilized for improvingthe degradation rate of the catalyst on difficult-to-degrade organic pollutants, and reaction conditions are moderate; the reaction is rapid, and continuous operation of wastewater treatment is realized. Difficult-to-degrade organic matters in the wastewater are catalytically oxidized through a microwave-catalyst-oxidant synergetic system, so that the difficult-to-degrade organic matters in the wastewater are greatly reduced and the biodegradability of the wastewater is improved.

Description

technical field [0001] The invention relates to a method for advanced treatment of refractory organic wastewater, belonging to the technical field of environmental engineering. Background technique [0002] With the continuous development of modern industrial production scale and sectors, people's increasing needs for a better life are met, and serious environmental pollution problems also arise. Refractory organic wastewater is usually characterized by: high concentration of organic matter, generally COD content exceeds 2000 mg / L, or even higher than hundreds of thousands of mg per liter; relatively low biochemical properties, BOD / COD is usually lower than 0.3, not easy to biochemical treatment; wastewater quality Complex, containing similar sulfides, heavy metals, salt, nitrogen compounds, toxic substances, fungicides, antibiotics, etc., usually accompanied by odor. Refractory organic wastewater will lead to hypoxia or anaerobic conditions in water bodies, which will lead...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
CPCC02F1/302C02F1/722C02F1/725C02F1/727C02F1/76C02F1/763C02F1/78C02F9/00C02F2301/08
Inventor 张桂华徐更张海杰周玉谢博亮
Owner 北京科瑞博远科技有限公司