Method for processing waste water by fenton oxidation

A technology for Fenton oxidation and wastewater treatment, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc.

Inactive Publication Date: 2009-11-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the traditional Fenton oxidation treatment method needs to consume a large amount of acid and alkali when treating wastewater, especially alkaline wastewater, which limits its industrial application. Therefore...

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  • Method for processing waste water by fenton oxidation
  • Method for processing waste water by fenton oxidation

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Experimental program
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Effect test

Embodiment 1

[0025] To treat the non-standard effluent of an oil refinery, H 2 o 2 as an oxidizing agent, Fe 2 SO 4 As a catalyst, the acid and base used are concentrated H 2 SO 4 and NaOH. The operating conditions are: H 2 o 2 The ratio to the mass concentration of organic matter (COD) in wastewater is 1:3, H 2 o 2 / Fe 2+ The molar ratio is 1:2, the pH of the oxidation tank is 3, the pH of the effluent is 6.5, the residence time of the oxidation tank is 10 minutes, the residence time of the sedimentation tank is 1 hour, and the residence time of the flocculation tank is 1 hour. Table 1 shows the data comparison between the wastewater treated by the Fenton oxidation treatment method of the present invention and the traditional Fenton oxidation treatment method. The results in Table 1 show that the Fenton oxidation method of the present invention is used to treat non-standard wastewater from refineries, the wastewater treatment effect is improved, and the acid-base consumption is ...

Embodiment 2

[0029] To treat high-concentration wastewater from a chemical plant, H 2 o 2 as an oxidizing agent, Fe 2 SO 4 As a catalyst, the acid and base used are concentrated H 2 SO 4 and NaOH. The operating conditions are determined as: H 2 o 2 The ratio to the mass concentration of organic matter (COD) in wastewater is 1:10, H 2 o 2 / Fe 2+ The molar ratio is 1:1, the pH of the oxidation tank is 3, the pH of the effluent is 6.5, the residence time of the oxidation tank is 10 minutes, the residence time of the sedimentation tank is 1 hour, and the residence time of the flocculation tank is 1 hour. Table 2 shows the data comparison between the wastewater treated by the Fenton oxidation treatment method of the present invention and the traditional Fenton oxidation treatment method.

[0030] The results in Table 2 show that the Fenton oxidation method of the present invention is adopted for the high-concentration wastewater of chemical plants, the wastewater treatment effect is i...

Embodiment 3

[0034] To treat reverse osmosis concentrated water in a factory, H 2 o 2 as an oxidizing agent, Fe 2 SO 4 As a catalyst, the acid and base used are concentrated H 2 SO 4 and NaOH. The operating conditions are determined as: H 2 o 2 The ratio to the mass concentration of organic matter (COD) in wastewater is 1:1, H 2 o 2 / Fe 2+The molar ratio is 1:1.5, the pH of the oxidation tank is 3, the pH of the effluent is 6.5, the residence time of the oxidation tank is 10 minutes, the residence time of the sedimentation tank is 1 hour, and the residence time of the flocculation tank is 1 hour. Table 3 compares the data of wastewater treated by the Fenton oxidation treatment method of the present invention and the traditional Fenton oxidation treatment method. The results in Table 3 show that the Fenton oxidation method of the present invention is used to treat reverse osmosis concentrated water, the wastewater treatment effect is improved, and the acid-base consumption is redu...

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Abstract

The invention relates to a method for processing waster water by fenton oxidation, comprising the following steps: (1) enabling alkaline waste water to be processed to enter a flocculation pond so as to be flocculated and precipitated; (2) enabling the flocculated waste water to enter an oxidation pond so as to be oxidized for fenton oxidation reaction; (3) enabling oxidized waste water to enter a precipitation pond so as to be precipitated; (4) adding alkali to supernatant discharged from precipitated waste water to adjust the pH value of the waste water till the waste waster is neutralized, and directly discharging the waste waster or processing the waste water by the next step; and (5) enabling acid precipitate obtained in the step (4) to return to a mixer in a refluxing way to be mixed with total or part of waste water to be processed. With the method for processing waster water through fenton oxidation, the consumption of acid and the alkali can be greatly reduced and content of salt in the waste water can be reduced so that the waste water processing effect is obviously improved.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for treating wastewater by Fenton oxidation. Background technique [0002] With the process of industrialization and urbanization in our country, a large number of industrial and domestic pollutants are discharged into the environment, which brings more and more serious pollution to water bodies. The deteriorating water quality not only causes water shortage in many areas, but also increases the cost of obtaining water resources for the whole society. What is more serious is that it endangers people's health. Therefore, it is necessary to treat the wastewater containing pollutants so that it can be discharged up to the standard . With the continuous development of water treatment technology, most of the wastewater can be treated, but for a long time, the treatment of organic wastewater with low B / C ratio in the environment has always been a difficult point in water treat...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/52C02F1/72
Inventor 高峰李本高桑军强马欣张利强秦冰杨青
Owner CHINA PETROLEUM & CHEM CORP
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