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Application of biological combination photocatalytic composite degradation liquid system in phenolic waste water degradation

A liquid system, photocatalytic technology, applied in biological water/sewage treatment, energy wastewater treatment, light water/sewage treatment, etc., can solve the problems of increased reaction cost, inconvenient separation and recovery of catalyst, and limitation of industrial application, etc., to achieve treatment cost Low cost, simple operation, and the effect of improving the removal rate

Inactive Publication Date: 2014-01-22
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photocatalytic method in the chemical method is a newly developed technology for treating phenol-containing wastewater in China. The photocatalytic method is mainly used to treat low-concentration phenol-containing wastewater after the co-condensation method recovers the resin. Add a photocatalyst to it and irradiate it with light (ultraviolet light or sunlight) and then heated and stirred for two hours and then sampled and measured, the reaction can be stopped after the phenol content reaches the emission standard; use TiO 2 Semiconductors such as photocatalysts can completely degrade organic substances such as phenol, but they must be excited by ultraviolet light to generate OH to oxidize organic substances, and TiO 2 The use of ultra-fine powder as a catalyst brings great inconvenience to the separation and recovery of catalysts in the later stage of sewage treatment, thus limiting the industrial application of this technology
And in the prior art, the photocatalytic degradation of wastewater basically needs to be irradiated with ultraviolet light or H 2 o 2 It is carried out in the presence of oxidizing agents, thus increasing the cost of the reaction

Method used

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  • Application of biological combination photocatalytic composite degradation liquid system in phenolic waste water degradation
  • Application of biological combination photocatalytic composite degradation liquid system in phenolic waste water degradation
  • Application of biological combination photocatalytic composite degradation liquid system in phenolic waste water degradation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: Application of bio-combined photocatalytic composite degradation liquid system in degrading phenol wastewater.

[0046] Add 6.383ml of initial phenol wastewater with a phenol concentration of 1000mg / L to 100ml of bio-combined photocatalytic composite degradation liquid system, that is, the concentration of phenol wastewater in the system is 60mg / L, and treat them with constant temperature oscillation under light conditions and dark conditions respectively 5d, the shaking temperature is 30°C, and the rotation speed is 150r / min, that is, the degradation is completed. The light source under the light condition is an ordinary fluorescent lamp, and a sample is taken every 24 hours, and the remaining phenol content in the solution is measured by an ultraviolet spectrophotometer, and the removal rate of phenol is calculated, and the results are as follows figure 1 shown.

[0047] The results showed that by figure 1 It can be seen that after constant temperature sh...

Embodiment 2

[0048] Example 2: Application of bio-combined photocatalytic composite degradation liquid system in degrading phenol wastewater.

[0049] Each contains Fe in 100ml 3 o 4 Aqueous solution of nanoparticles, bio-combined photocatalytic composite degradation liquid system and Fe 3 o 4 Add 13.636ml of initial phenol wastewater with a concentration of 1000mg / L to the three groups of nanoparticle-oxalic acid mixed solution, that is, the concentration of phenol wastewater in the system is 120mg / L. Contains Fe 3 o 4 Fe in aqueous solution of nanoparticles 3 o 4 The concentration of nanoparticles is 0.5g / L, Fe 3 o 4 Fe in nanoparticles-oxalic acid mixture 3 o 4 The concentration of nanoparticles is 0.5g / L, and the molar concentration of oxalic acid is 4.545mmol / L. The above three groups of systems were subjected to constant temperature shaking treatment for 3 days under the conditions of light, 37°C, and 150r / min, and the degradation was completed. Get a sample every 24h, ut...

Embodiment 3

[0051] Example 3: Application of bio-combined photocatalytic composite degradation liquid system in degrading phenol wastewater.

[0052] respectively to 100ml Fe 3 o 4 Aqueous solution of nanoparticles, Fe-free 3 o 4 Medium for nanoparticles, Fe 3 o 4 Add 6.383ml of initial phenol wastewater with a concentration of 1000mg / L to the mixed solution of nanoparticle-oxalic acid and bio-combined photocatalytic composite degradation liquid system, that is, the degree of phenol in the four systems is 60mg / L. Fe 3 o 4 Fe in aqueous solution of nanoparticles 3 o 4 Concentration of nanoparticles is 0.5g / L; Fe-free 3 o 4 The medium of nanoparticles was inoculated with 2ml spore concentration of 5.33×10 5 The Kirk liquid culture medium of Phanerochaete chrysosporium spore suspension of individual / ml; Fe 3 o 4 Fe in nanoparticles-oxalic acid mixture 3 o 4 The concentration of nanoparticles is 0.5g / L, and the molar concentration of oxalic acid is 4.545mmol / L. The above four ...

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Abstract

The invention discloses application of a biological combination photocatalytic composite degradation liquid system in phenolic waste water degradation. The application comprises the following steps that initial phenolic waste water is added to the biological combination photocatalytic composite degradation liquid system, constant-temperature oscillation treatment is carried out under a light condition, and the phenolic waste water in the system is degraded. According to the application, biodegradation is combined with photocatalytic degradation to simultaneously degrade the phenolic waste water, and the application has the advantages of being high in treatment efficiency, simple in treatment process, convenient to operate, low in cost and the like.

Description

technical field [0001] The invention relates to the field of phenol wastewater treatment, in particular to the application of a bio-combined photocatalytic composite degradation liquid system in degrading phenol wastewater. Background technique [0002] Phenol-containing wastewater mainly comes from industrial sectors such as coking plants, gas plants, petrochemical plants, and insulation material plants, as well as production processes such as petroleum cracking to ethylene, synthetic phenol, polyamide fibers, synthetic fuels, organic pesticides, and phenolic resins. Phenol-containing wastewater mainly contains phenol-based compounds such as phenol, cresol, xylenol and nitrophenol-cresol, which are one of the important pollutants in water bodies. Phenolic compounds are protoplasmic poisons that can be toxic to all biologically active bodies. They can directly enter the blood circulation through contact with the skin and mucous membranes without detoxification by the liver, ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F1/30C02F101/34
CPCY02W10/37
Inventor 王聪黄丹莲许飘曾光明赖萃赵美花黄超李宁杰罗湘颖徐娟娟
Owner HUNAN UNIV