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Method for treating phosphorus-containing wastewater

A treatment method and wastewater technology, applied in water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc., can solve environmental and equipment pollution problems, achieve less sludge, excellent removal of COD and total Phosphorus effect, effect of improving reusability

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is prone to produce iron sludge, causing pollution to the environment and equipment, etc.

Method used

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  • Method for treating phosphorus-containing wastewater
  • Method for treating phosphorus-containing wastewater

Examples

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preparation example Construction

[0027] According to the present invention, the above-mentioned formula MFe 2 o 4 The indicated magnetic spinel can be prepared by precipitation method, gel method, etc., and the solid phase is further ground and sieved with a 100-400 mesh sieve. For the precipitation method, the above formula MFe 2 o 4 The preparation method of the indicated magnetic spinel preferably includes: providing an aqueous solution containing a soluble iron salt and a soluble M-containing element salt, and adjusting the solution to alkalinity by a basic compound, and then performing heat treatment; the heat-treated product Solid-liquid separation, washing, drying, and roasting.

[0028] Wherein, the soluble iron salt and the soluble M element-containing salt may be one or more of nitrate, chloride, sulfate and the like. Specific examples of the soluble iron salt may be one or more of ferric nitrate, ferric chloride, ferric sulfate, and the like. Specific examples of the soluble M element-containi...

preparation example 1

[0064] This preparation example is used to illustrate the magnetic spinel catalyst of the present invention.

[0065] Weigh 6.1g FeCl 3 ·6H 2 O and 4.2 g FeSO 4 ·7H 2 O was dissolved in 200 mL deionized water. Under stirring, ammonia water was added dropwise until the pH of the mixture was 10 to produce precipitation; then heated to 90°C and stirred for 1h. The precipitate was centrifuged, washed, dried at 150°C for 2h, and then calcined at 900°C for 3h to obtain magnetic spinel Fe 3 o 4 Catalyst F1.

preparation example 2

[0067] This preparation example is used to illustrate the magnetic spinel catalyst of the present invention.

[0068] Weigh 2.4g Cu(NO 3 ) 2 ·3H 2 O and 4.8g Fe(NO 3 ) 3 Add 100 mL of deionized water. 11.5 g of citric acid was weighed to form a 10% by weight aqueous solution. Drop the citric acid aqueous solution into the aforementioned saline solution (adding within 5 minutes), and stir at 60°C for 4 hours to form a dark blue sol, and dry the resulting sol at 120°C for 6 hours to form a honeycomb porous xerogel, and then Calcined at 900°C for 3 hours to obtain copper-based spinel CuFe 2 o 4 Catalyst F2.

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Abstract

The invention relates to the field of sewage treatment, in particular to a treatment method of phosphorus-containing wastewater. The method comprises the following steps: (1) in the presence of an oxidant and a catalyst, carrying out catalytic oxidation treatment on the phosphorus-containing wastewater; (2) carrying out solid-liquid separation on the phosphorus-containing wastewater subjected to catalytic oxidation treatment under the application of a magnetic field; wherein the catalyst is a catalyst containing magnetic spinel. The phosphorus-containing wastewater treatment method can be suitable for treatment of phosphorus-containing wastewater with a wider pH range, excellent COD and total phosphorus removal effects are obtained, the treated water can be discharged in a standard reaching manner, and the amount of generated sludge is reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment method for phosphorus-containing wastewater. Background technique [0002] Because excessive phosphorus in water will lead to eutrophication of water, phosphorus is one of the main pollution discharge indicators strictly controlled by the state. On July 1, 2017, refining and chemical companies will enforce the new standards "GB31570-2015 Pollutant Discharge Standards for Petroleum Refining Industry" and "GB31571-2015 Pollutant Discharge Standards for Petrochemical Industry". Strict emission limits. [0003] In refining and chemical enterprises, the secondary biochemical treatment process, which is the main body of the existing sewage treatment plant, has methodological limitations in the removal of phosphorus, and it is difficult to meet the requirements of the new standard limit only through biochemical treatment. Therefore, it must be supplemented with deep phospho...

Claims

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Application Information

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IPC IPC(8): C02F9/12B01J23/745
CPCC02F1/722C02F1/725C02F1/488C02F9/00B01J23/745B01J23/005C02F1/66C02F2303/06C02F2209/08C02F2305/023B01J35/33
Inventor 高嵩马欣王辉王金华傅晓萍
Owner CHINA PETROLEUM & CHEM CORP
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