Process method of phenolic waste water

A treatment method and technology for phenol wastewater, which are applied in water/sewage treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc. The process equipment is simple, the treatment is efficient and fast, and the effect of no secondary pollution

Inactive Publication Date: 2008-11-19
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high pollution load, complex water quality and defects in the design of the treatment process, it is difficult to meet the discharge standards; in recent years, new processes such as adsorption-incineration method and anaerobic-aerobic biochemical method have been developed, but there are also problems such as high cost. Problem; Although coagulation, adsorption, ozone oxidation, chlorine dioxide oxidation, ferrate oxidation, catalytic oxidation and other technologies have been extensively studied over the years, these technologies are basically used for pretreatment and posttreatment of wastewater, and it is difficult to achieve Effective purification of phenol wastewater, especially for some phenols with low solubility in water, which are more difficult to deal with

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The treatment method of phenol-containing wastewater of the present invention, embodiment one is the treatment test of chlorophenol wastewater.

[0010] In 100mL of 10g / L o-chlorophenol emulsion wastewater, add 0.8mL of 0.5g / mL ferric chloride solution under stirring condition, then slowly add 10mL of 30% H 2 o 2 In the wastewater, the oxidation reaction proceeds rapidly, and the wastewater is taken for analysis after 2 minutes, and the removal rate of o-chlorophenol is as high as 99%.

[0011] At the same time, the same treatment test was carried out on p-chlorophenol and pentachlorophenol wastewater, and the same good treatment effect was obtained.

[0012] The treated wastewater contains a certain amount of Fe 3+ ions and a certain chromaticity, add lime to the treated wastewater according to the ratio of 100mL wastewater to 2g lime, and use the method of precipitation and adsorption, on the one hand, the Fe in the water can be 3+ The ions are removed by precipita...

Embodiment 2

[0014] The treatment method of phenol-containing wastewater of the present invention, embodiment 2 is the treatment test of nitrophenol wastewater.

[0015] In 100mL 10g / L 2,4,6-trinitrophenol wastewater, add 0.8mL 0.5g / mL ferric chloride solution under stirring condition, then slowly add 10mL 30% H 2 o 2 In the waste water, the oxidation reaction proceeds rapidly, and the waste water is taken for analysis after 5 minutes, and the removal rate of 2,4,6-trinitrophenol can reach more than 90%.

[0016] The treated wastewater contains a certain amount of Fe 3+ ions and a certain chromaticity, add lime to the treated wastewater according to the ratio of 100mL of wastewater to 5g of lime, and use the method of precipitation and adsorption. On the one hand, the Fe in the water can be 3+ The ions are removed by precipitation, and at the same time, the wastewater can be decolorized and the pH value of the wastewater can be adjusted. The wastewater after the above treatment basically...

Embodiment 3

[0018] The treatment method of phenol-containing wastewater of the present invention, embodiment three is naphthol wastewater test.

[0019] In 100mL 3g / L naphthol wastewater, add 0.4mL 0.5g / mL ferric chloride solution under stirring condition, then slowly add 10mL 30% H 2 o 2 In the waste water, the oxidation reaction proceeds rapidly, and the waste water is taken for analysis after 5 minutes, and the removal rate of naphthol can reach more than 90%.

[0020] The treated wastewater contains a certain amount of Fe 3+ ions and a certain chromaticity, add lime to the treated wastewater according to the ratio of 100mL wastewater to 8g lime, and use the method of precipitation and adsorption. On the one hand, Fe in the water can be 3+ The ions are removed by precipitation, and at the same time, the wastewater can be decolorized and the pH value of the wastewater can be adjusted. The wastewater after the above treatment basically meets the national first-level or second-level ind...

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Abstract

The invention discloses a method for treating phenolic effluent. The method comprises the steps of complexing ferric trichloride with phenols in the effluent and then conducting phenolic effluent treatment by adopting the method of oxidizing Phenol-Fe complex with H2O2. Compared with the prior art, the method has the advantages that during the treatment, some phenols which are hard to dissolve can be oxidized and degraded after a complexed dissolution, expanding the application range of oxidation degradation. The method and technology adopts simple equipment and is effective and fast in treatment and complete in phenols degradation without secondary pollution, which contributes to achieving the state Grade 1 or Grade 2 industrial effluent discharge standard after a simple treatment.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment method applicable to various types of phenol-containing wastewater. Background technique [0002] Phenol-containing wastewater not only causes agricultural and fishery losses, but also endangers human health. Phenol is also a recognized carcinogen, especially chlorophenols, which are more toxic. Therefore, countries have strict requirements on the discharge of phenol in wastewater. my country lists phenol as the second type of pollutant, and the discharge standards of the first and second types are both 0.52mg / L. In the form of increasingly tense petroleum energy, the application of coal as energy and chemical raw materials has attracted more and more attention. Coal gasification is a clean and efficient coal utilization method, but the process produces a large amount of highly polluted coal gasification wastewater, which is rich in phenol, ammonia, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F9/04C02F1/72C02F101/34
Inventor 解庆范陈楷翰陈延民袁建军
Owner QUANZHOU NORMAL UNIV
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