Method for photochemical degradation of phosphorus-containing wastewater

A photochemical and wastewater technology, applied in the field of photochemical degradation of phosphorus-containing wastewater, achieves the effects of mild conditions, easy control and regulation, and simple operation

Active Publication Date: 2016-12-07
NINGBO SUNNY NOVEL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no relevant feasible technology to apply glycolic acid to the treatment of phosphorus-containing wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw materials used in this embodiment are all commercial products and are used directly without purification, and the wastewater is directly taken from a chemical plant.

[0032] The photodegradation reaction of wastewater was carried out in a disc-shaped open glass container with a diameter of 20 cm. Magnetic stirring is placed under the container, and the entire reactor is placed directly under the ultraviolet lamp source. The wavelength of the ultraviolet lamp is 365nm, the power is 500W, and the distance between the bottom of the glass container and the ultraviolet lamp source is 15cm.

[0033] The implementation steps of this embodiment are as follows:

[0034] First, put 90g of phosphorus-containing phenol wastewater into a disc-shaped glass container. The test indicators of the wastewater supernatant are as follows: COD content of 120,000 mg / L, phenol content of 4500 mg / L, and total phosphorus content of 2300 mg / L. Then add 10g of sodium peroxide solution with a ma...

Embodiment 2

[0036] The raw materials used in this embodiment are all commercial products and are used directly without purification, and the wastewater is directly taken from a chemical plant.

[0037] The photodegradation reaction of glycerol is carried out in a cube-shaped open plastic container with a side length of 1 meter. The container is equipped with a 300W self-priming pump water circulation system. The entire reactor is placed directly under the ultraviolet lamp source. The wavelength of the ultraviolet lamp is 254nm, the power is 2000W, and the distance between the bottom of the container and the ultraviolet lamp source is 105cm.

[0038] The implementation steps of this embodiment are as follows:

[0039] First put 400kg of phosphorous wastewater into a container. The test indicators of the wastewater supernatant are as follows: COD content 100000mg / L, benzene ring organics (including toluene and polyhydroxyphenols, etc.) content 3700mg / L, total phosphorus content 1700mg / L. After ad...

Embodiment 3

[0041] The glycerol used in this example is a commercial product and is used directly without purification.

[0042] The photodegradation reaction of glycerol is carried out in an air flotation machine with a volume of 10 cubic meters. Use a waterproof UV lamp source. The UV lamp is placed below the liquid level of the solution at a distance of 5m from the bottom of the container. The wavelength of the UV lamp is 365nm and the power is 3000W.

[0043] The implementation steps of this embodiment are as follows:

[0044] First, put 6 tons of phosphorus-containing wastewater into a container. The test indicators of the wastewater supernatant are as follows: COD content 80,000 mg / L, phenol content 2700 mg / L, and total phosphorus content 1200 mg / L. After adding 1.5t of industrial hydrogen peroxide solution with a mass concentration of 28%, 5kg of glycerin, 2kg of ferrous sulfate, 10kg of glycolic acid and 20kg of calcium chloride, adjust the pH of the solution to 2.7 with 0.1% dilute hyd...

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Abstract

The invention discloses a method for photochemical degradation of phosphorous-containing wastewater, and aims to degrade organic matters and precipitate and remove phosphorus in phosphorus-containing wastewater. The method comprises the following steps: using peroxide as an oxidant, carbohydrate as an initiator, ferrous ion as a catalyst, ferrous ion complexing organic matter hydroxyacetic acid as a stabilizer, and soluble aluminum salt or calcium salt as a phosphate precipitant; and performing UV photo-oxidative degradation under a weak acidity condition of pH 2-6. In the method provided by the invention, the peroxide is decomposed through a UV-induced Fenton reaction to generate free radicals and the catalyst in a complexing state is used at the same time to eliminate the poisoning of phosphate radicals to the catalyst, thereby realizing the rapid degradation of high-concentration organic wastewater containing a large amount of phosphate radicals. The method has the advantages of simple steps, no need of heating or pressing, and easy control, uses the cheap stabilizer, realizes the degradation process under mild conditions, and is a phosphorus-containing wastewater degradation method featured with huge potential, environmental protection, high efficiency and economy.

Description

Technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for photochemical degradation of phosphorus-containing wastewater. Background technique [0002] Hydroxyl radicals are substances in nature second only to fluorine in oxidation. They can effectively break ether bonds, ester bonds and even carbon-carbon double bonds and single bonds, and can be used to degrade various soluble organic small molecules. . The Fenton reaction is one of the effective methods to generate hydroxyl radicals. Because of its rapid reaction, mild reaction temperature and pressure, it has become a hot spot in the study of high-concentration refractory industrial organic wastewater treatment at home and abroad. For example, wastewater containing phenolic substances is highly toxic and has carcinogenic effects on the human body, and belongs to industrial organic wastewater that is difficult to degrade. Fenton reaction is used to treat phenols, cresols,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/72
CPCC02F1/32C02F1/722C02F1/725C02F2305/026
Inventor 佘振庄天浩汪小红
Owner NINGBO SUNNY NOVEL MATERIAL TECH
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