Method for treating petrochemical waste water and biochemical tail water through recycled coagulant

A petrochemical wastewater and treatment method technology, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, oxidation treatment of sludge, etc., can solve the problem of waste of metal resources such as iron and other waste, secondary pollution, etc. problems, to achieve the effect of reasonable configuration, strong oxidation ability and good connection

Inactive Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coagulation process is the transfer process of pollutants. During the coagulation process, a large amount of chemical deposits—coagulation mud will be produced. The coagulation mud contains coagulant, macromolecular organic matter and other refractory sub

Method used

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  • Method for treating petrochemical waste water and biochemical tail water through recycled coagulant
  • Method for treating petrochemical waste water and biochemical tail water through recycled coagulant
  • Method for treating petrochemical waste water and biochemical tail water through recycled coagulant

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Wastewater biochemical tail water of a petrochemical company.

[0017] (1) Coagulation treatment with composite coagulant: Add ferrous sulfate and polyaluminum ferric sulfate in a ratio of 3:7 to the petrochemical wastewater and add composite coagulant and coagulant polyacrylamide to adjust the pH to 3. After the composite coagulant strengthens the reaction, the sewage is separated from mud and water to obtain coagulation sediment coagulation mud. The COD of wastewater before coagulation is 60, the COD of wastewater after coagulation is 37, and the COD of coagulation mud is 2337.

[0018] (2) Iron-carbon micro-electrolysis reaction in concrete mud: Add cast iron chips and activated carbon filler to the concrete mud for 0.5h reaction, the volume ratio of iron-carbon filler is 4:1, and the volume ratio of iron-carbon filler and concrete mud is 1:7 . Sulfuric acid was added during the reaction to keep the pH value of the concrete at 3.

[0019] (3) Fenton oxidation rege...

Embodiment 2

[0024] Wastewater biochemical tail water of a petrochemical company.

[0025] (1) Coagulation treatment with composite coagulant: Add ferric chloride and polyaluminum ferric chloride in a ratio of 5:5 to the petrochemical wastewater and add composite coagulant and coagulant sodium polyacrylate to adjust the pH to 10. The sewage after the enhanced reaction of the composite coagulant is separated from the mud and water to obtain the coagulation sediment coagulation mud. The COD of wastewater before coagulation is 75, the COD of wastewater after coagulation is 49, and the COD of coagulation mud is 2649.

[0026] (2) Micro-iron-carbon micro-electrolysis reaction in concrete mud: Add cast iron chips and activated carbon filler to the concrete mud for 1 hour reaction, the volume ratio of iron to carbon is 1:5, and the volume ratio of iron-carbon filler to concrete mud is 3:1 . During the reaction, hydrochloric acid was added to keep the pH value of the concrete at 5.

[0027] (3)...

Embodiment 3

[0032] PTA wastewater biochemical tail water of a petrochemical company.

[0033](1) Coagulation treatment with composite coagulant: add aluminum sulfate, polyferric silicon in a ratio of 7:3 to the petrochemical wastewater and add a composite coagulant and coagulant sodium vinyl sulfonate to adjust the pH to 5. The sewage after the enhanced reaction of the composite coagulant is separated from the mud and water to obtain the coagulation sediment coagulation mud. The COD of wastewater before coagulation is 80, the COD of wastewater after coagulation is 42, and the COD of coagulation mud is 3841.

[0034] (2) Iron-carbon micro-electrolysis reaction in concrete mud: add cast iron chips and activated carbon filler to the concrete mud for 2 hours, the volume ratio of iron-carbon filler is 1:1, and the volume ratio of iron-carbon filler and concrete mud is 1:5. Sulfuric acid was added during the reaction to maintain the pH value of the concrete at 4.

[0035] (3) Fenton oxidati...

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Abstract

The invention provides a method for treating petrochemical waste water and biochemical tail water through a recycled coagulant, relates to a petrochemical waste water and biochemical tail water treatment method and in particular relates to coagulation in the waste water and biochemical tail water treatment method and a coagulation mud oxidation regenerating and recycling. The treatment method comprises the following steps: (1) performing coagulation treatment by using a composite coagulant: adding the composite coagulant and coagulant aid into the petrochemical waste water and performing mud water separation to obtain coagulation precipitate coagulation mud; (2) performing coagulation mud and iron carbon micro-electrolytic reaction: adding iron carbon filler into the coagulation mud, reacting for 0.5 to 3 hours, and acidifying to maintain the pH value of the coagulation mud to be acidic; (3) performing Fenton-like oxidative regeneration of the coagulation mud: directly adding oxidant into the micro-electrolytic water containing a large number of Fe<2+>, coupling with the Fe<2+> in the coagulation mud, and performing Fenton-like oxidation reaction for 0.5 to 3 hours; and (4) recycling the coagulation mud, wherein the coagulation property of the coagulant in the coagulation mud after oxidation is recovered; the coagulation mud can be reused for coagulation of the waste water and then is oxidized again; and the coagulation can be reused.

Description

technical field [0001] The invention relates to a petrochemical wastewater biochemical tail water treatment method in which a coagulant can be recycled, and relates to a petrochemical wastewater biochemical tail water treatment method, in particular to coagulation in the wastewater biochemical tail water treatment method, coagulation sludge oxidation regeneration, recycling use method. Background technique [0002] Since the beginning of the 21st century, petrochemical enterprises have been major water users and major polluters. Petrochemical wastewater usually contains benzene rings, heterocycles, polycyclics, macromolecules, refractory persistent organic compounds that inhibit or poison microorganisms, It mainly contains olefins, aromatics, esters, ethylene glycol, butyl octanol, acrylic acid, formic acid, propionic acid, methylamine, benzene, mixed xylene and PTA, etc. The combined process of physical chemical oxidation and biological oxidation is the most effective tech...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F11/00C02F11/06
Inventor 王哲明沈树宝黄勇陈英文罗翔章继龙刘臻臻王孙崯郭玉旗王桂林韩晓磊
Owner CHINA PETROLEUM & CHEM CORP
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