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Method for reducing phenol content in phenol-containing wastewater

A technology of phenol content and phenol wastewater, which is applied in the direction of chemical instruments and methods, water pollutants, oxidized water/sewage treatment, etc., can solve the problems of difficult treatment of inorganic wastewater, complicated treatment process, low total phenol content, etc., to achieve beneficial Effects of industrialization promotion, reduction of energy consumption and avoidance of disposal

Inactive Publication Date: 2019-01-11
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method shows a good dephenolization effect, the treatment process is more complicated, and the total phenol content in the wastewater is low (below 5000mg / L); wherein, in the process of formaldehyde dephenolization, inorganic acids and alkalis are used as catalysts, and after dephenolization A large amount of difficult-to-treat inorganic wastewater will be produced, and the reaction temperature of the subsequent catalytic oxidation process is around 180°C, and the energy consumption is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The phenol content in phenol-containing wastewater is about 10000mg / L. Take 188.2g of wastewater, add catalyst ammonia water to adjust the pH to 10, and after adjustment, the system is heated to 70°C, and the temperature is gradually raised to 80°C at a heating rate of 2°C / min. Add 4.875g of formaldehyde solution, react for 30min, then continue to heat up to 90°C and continue to react for 3h. After the reaction, cool down to 80°C, add 0.5mol / L aluminum chloride solution to adjust the pH to 8 for coagulation, and stir for 2 hours. The reaction product is a reddish-brown turbid liquid. Centrifuge the reaction product and filter to obtain a reddish-brown clear liquid. , the measured phenol content is about 2200mg / L, and the phenol content is reduced by 78%.

[0015] Take 100mL of the above-mentioned preliminary dephenolized water sample and put it into a three-necked flask, and then pass a mixed gas of ozone / air at room temperature for continuous reaction for 3h. Wherein ...

Embodiment 2

[0017] The phenol content in phenol-containing wastewater is about 10,000 mg / L. Take 188.2 g of wastewater, add catalyst ammonia water to adjust the pH to 10, and after adjustment, the system is heated to 70°C. During the process of gradually raising the temperature to 80°C at a heating rate of 2°C / min Add 4.875g of formaldehyde solution, react for 30min, then continue to heat up to 90°C and continue to react for 1h. After the reaction, cool down to 80°C, add 0.5mol / L aluminum chloride solution to adjust the pH to 7 for coagulation, and stir for 3 hours. The reaction product is a reddish-brown turbid liquid. The reaction product is centrifuged and filtered to obtain a reddish-brown clear liquid. , the measured phenol content was about 1800mg / L, and the phenol content was reduced by 82%.

[0018] Take 100mL of the above-mentioned preliminary dephenolized water sample and put it into a three-necked flask, and then pass a mixed gas of ozone / air at room temperature for continuous ...

Embodiment 3

[0020] The phenol content in phenol-containing wastewater is about 10,000 mg / L. Take 188.2 g of wastewater, add catalyst ammonia water to adjust the pH to 10, and after adjustment, the system is heated to 70°C. During the process of gradually raising the temperature to 80°C at a heating rate of 2°C / min Add 6.094g of formaldehyde solution, react for 30min, continue to heat up to 90°C and continue to react for 3h. After the reaction, cool down to 80°C, add 0.5mol / L aluminum chloride solution to adjust the pH to 8 for coagulation, and stir for 2 hours. The reaction product is a reddish-brown turbid liquid. Centrifuge the reaction product and filter to obtain a reddish-brown clear liquid. , the measured phenol content was about 2700mg / L, and the phenol content was reduced by 73%.

[0021] Take 100mL of the above-mentioned preliminary dephenolized water sample and put it into a three-necked flask, and then pass a mixed gas of ozone / air at room temperature for continuous reaction fo...

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Abstract

The invention relates to the field of waste water processing, and more specifically relates to a method for reducing phenol content in phenol-containing wastewater. The method comprises the followingsteps: adding formaldehyde to the phenol-containing wastewater to-be-treated, heating the material under acidic or alkaline conditions, generating a resin-based polymer by phenol and formaldehyde in the wastewater, using a coagulation agent to adjust the pH to coagulate the resin, performing centrifugation, performing low-temperature wet oxidation, and reducing the phenol content in the wastewaterto below 50 ppm. The method provided by the invention is simple, the cost is low, and the method is very suitable for the treatment of the phenol-containing wastewater generated in a coal coking process, and has broad application prospects.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for reducing the phenol content of phenol-containing wastewater. Background technique [0002] Phenol-containing wastewater mainly comes from oil refining, gas washing, coking, papermaking, synthetic ammonia, wood preservation and chemical industries. It is one of the important pollutants in water bodies. Phenols are protoplasmic poisons and are highly toxic substances. It can directly enter the blood circulation through contact with the skin and mucous membranes without detoxification by the liver, causing cell damage and loss of vitality. It can also invade the human body through the oral cavity and cause cell damage. High-concentration phenol can coagulate protein and continue to penetrate into the body, causing deep tissue damage, necrosis and even systemic poisoning. Even low-concentration phenol can denature protein. When the human body ingests a certain amou...

Claims

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Application Information

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IPC IPC(8): C02F1/78C08G8/08C02F101/34
CPCC02F1/78C02F2101/345C08G8/08
Inventor 李学兵陈松范芮堃李广慈
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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