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Pretreatment system and method for organic industrial wastewater difficult to biodegrade

A technology that is difficult to biodegrade and industrial wastewater is applied in the field of pretreatment systems for organic industrial wastewater, which can solve the problems of inability to take into account the treatment effect and cost, and achieve the effects of simple structure, easy manufacture, and improved biodegradability.

Inactive Publication Date: 2020-09-08
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to propose a pretreatment system and method for organic industrial wastewater that is difficult to biodegrade, aiming to solve the problem that the existing organic industrial wastewater pretreatment method cannot take into account the treatment effect and cost

Method used

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  • Pretreatment system and method for organic industrial wastewater difficult to biodegrade
  • Pretreatment system and method for organic industrial wastewater difficult to biodegrade
  • Pretreatment system and method for organic industrial wastewater difficult to biodegrade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] An acid-base regulator is put into the acid-base regulating tank 20, so that the pH of the organic wastewater therein is 5.2. The organic waste water enters the electrolytic cell 10 .

[0054] In the electrode plate group 1, the distance between the anode plate 11 and the cathode plate 12 is 3cm; the hydraulic retention time of the organic wastewater in the electrolytic cell 10 is set to 50min; the power supply is connected to the electrode plate group 1 to supply power, and the current density is set to 12mA / cm 2 . Start the power supply 5 to start electrolysis, then start the air compression equipment, and start periodic aeration. The air-water ratio in the aeration stage is 1.5:1, and in one cycle, the aeration time and stop aeration time are both 25 minutes.

[0055] Sampling the treated water at the water outlet 4 of the electrolytic cell 1, using a COD analyzer and a BOD detector to detect the CODcr content and BOD of the treated water respectively, and calculate...

Embodiment 2

[0057] An acid-base regulator is put into the acid-base regulating pool 20, so that the pH of the organic wastewater therein is 4. The organic waste water enters the electrolytic cell 10 .

[0058] In the electrode plate group 1, the distance between the anode plate 11 and the cathode plate 12 is 2.5cm; the hydraulic retention time of the organic waste water in the electrolytic cell 10 is set to be 35min; the power supply is connected to the electrode plate group 1 to supply power, and the current density is set to 6mA / cm 2 . Start the power supply 5 to start electrolysis, then start the air compression equipment, and start periodic aeration. The air-water ratio in the aeration stage is 3:1, and within one cycle, the aeration time and stop aeration time are both 15 minutes.

[0059] Sampling the treated water at the water outlet 4 of the electrolytic cell 1, using a COD analyzer and a BOD detector to detect the CODcr content and BOD of the treated water respectively, and ca...

Embodiment 3

[0061] An acid-base regulator is put into the acid-base regulating pool 20, so that the pH of the organic wastewater therein is 6. The organic waste water enters the electrolytic cell 10 .

[0062] In the electrode plate group 1, the distance between the anode plate 11 and the cathode plate 12 is 4cm; the hydraulic retention time of the organic wastewater in the electrolytic cell 10 is set to 90min; the power supply is connected to the electrode plate group 1, and the current density is set to 20mA / cm 2 . Start the power supply 5 to start electrolysis, then start the air compression equipment, and start periodic aeration. The air-water ratio in the aeration stage is 1.2:1, and within one cycle, the aeration time and stop aeration time are both 30 minutes.

[0063] The treated water was sampled at the water outlet 4 of the electrolytic cell 1, the CODcr content and BOD of the treated water were detected by a CODcr analyzer and a BOD detector, and the BOD / CODcr value was calcul...

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Abstract

The invention discloses a pretreatment system and method for organic industrial wastewater difficult to biodegrade. The pretreatment system for the organic industrial wastewater difficult to biodegrade comprises an electrolytic cell, wherein an electrode plate group and an aeration device are arranged in the electrolytic cell, the electrode plate group comprises an anode plate and a cathode plate,the anode plate and the cathode plate are both activated carbon fiber electrode plates, the aeration device comprises an aeration head, and the aeration head is arranged below the electrode plate group. The technical scheme aims to solve the problem that the existing pretreatment method for the organic industrial wastewater difficult to biodegrade cannot give consideration to both the treatment effect and the cost consumption.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a pretreatment system and method for organic industrial wastewater that is difficult to biodegrade. Background technique [0002] Organic industrial wastewater has complex components and is difficult to treat. For example, papermaking wastewater, chemical synthetic dye wastewater, pharmaceutical wastewater, coking wastewater, etc., not only has a large amount of wastewater, but also has high pollutant concentration and large chroma, and is highly toxic and biodegradable. (BOD / CODcr) is very poor, making it extremely difficult to be biochemically degraded, which brings great difficulties to biological treatment. Therefore, pretreatment is often required before traditional biological treatment. Currently, the commonly used pretreatment methods are mainly physical and chemical methods, such as filtration, advanced oxidation technology, ozone oxidation, extraction, coagu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F1/461C02F9/06C02F101/30
CPCC02F1/467C02F1/46109C02F9/00C02F2101/30C02F2001/46133C02F2001/46152C02F1/66C02F7/00
Inventor 贺杏华张荣堂刘杰胜
Owner WUHAN POLYTECHNIC UNIVERSITY
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