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A 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 cost reduction, low price, and easy control and adjustment

Active Publication Date: 2019-03-15
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 phosphorus-containing wastewater treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw materials used in this example are all commercial products and used directly without purification, and the waste water 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. A magnetic stirrer is placed under the container, and the entire reactor is placed directly under the ultraviolet light source. The ultraviolet light has a wavelength of 365nm and a power of 500W. The distance between the bottom of the glass container and the ultraviolet light 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 120000mg / L, phenol content 4500mg / L, and total phosphorus content 2300mg / L. After adding 10 g of mass concentration of 30% sodium peroxide s...

Embodiment 2

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

[0037] The photodegradation reaction of glycerol was carried out in a square-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 light source. The ultraviolet light has a wavelength of 254nm and a power of 2000W. The distance between the bottom of the container and the ultraviolet light source is 105cm.

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

[0039] First put 400kg of phosphorus-containing wastewater into the container. The test indicators of the wastewater supernatant are as follows: COD content 100,000mg / L, benzene-ring organic matter (including toluene and polyhydroxyphenol, etc.) content 3700mg / L, and total phosphorus co...

Embodiment 3

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

[0042] The photodegradation reaction of glycerol was carried out in a flotation machine with a volume of 10 cubic meters. A waterproof ultraviolet light source is adopted, and the distance between the ultraviolet lamp and the bottom of the container is 5m below the liquid surface of the solution, the wavelength of the ultraviolet lamp is 365nm, and the power is 3000W.

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

[0044] First put 6t of phosphorus-containing wastewater into the container. The test indicators of the wastewater supernatant are as follows: COD content 80000mg / L, phenol content 2700mg / L, and total phosphorus content 1200mg / 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 solut...

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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 radical is the second most oxidizing substance in nature after fluorine gas. It can effectively break ether bonds, ester bonds, and even carbon-carbon double bonds and single bonds. It 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 treatment of high-concentration refractory industrial organic wastewater at home and abroad. For example, wastewater containing phenolic substances is highly toxic and carcinogenic to the human body, and is a refractory industrial organic wastewater. The Fenton reaction is used to treat various phenols such as phenol, cresol, and chlo...

Claims

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Application Information

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Patent Type & Authority Patents(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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