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A photoreactor for wastewater treatment

A kind of photoreactor, technology of wastewater treatment

Inactive Publication Date: 2017-12-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In suspension photoreactors such as CPCR and IPC, although the photocatalytic suspension system is more efficient than the stationary phase system, the difficult recovery and high cost of the suspension system photocatalyst make the supported catalyst a photocatalytic reactor design. In a fixed-bed reactor such as DSSR, the photocatalyst is loaded on the wall of the reactor, and the effective reaction area of ​​the photocatalytic material is reduced, resulting in a reduction in the catalyst activity and the utilization efficiency of the light source, and due to the laminar flow on the wall The existence of layers, the degree of fluid turbulence is low, and it is strongly affected by diffusion
In addition, the above-mentioned photoreactions need to be invested in a certain site as a reactor for industrial application, and the original sewage system needs to be modified. The application is troublesome and requires a large investment of funds.

Method used

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  • A photoreactor for wastewater treatment
  • A photoreactor for wastewater treatment
  • A photoreactor for wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Choose a glass mirror with a size of 100×30cm and a hollow glass bead with a diameter of 2.5cm and a through hole of 2mm in diameter, wash and dry with acetone, ethanol, and deionized water in turn; brush the surface of the dried glass mirror with a certain concentration Hydrofluoric acid buffer solution, the glass beads are immersed in the hydrofluoric acid buffer solution, and the etching process is carried out. The etching time is 3 hours; after the etching is completed, the glass mirror and glass beads are repeatedly washed with deionized water to PH= 7. Air dry naturally and set aside.

[0028] Coat a layer of titanium dioxide transparent sol precursor on the treated glass mirror surface, place it vertically until it is naturally dried, repeat the above-mentioned coating operation 5 times, dry it at 80°C and put it in a calcining kiln to slowly raise the temperature to 500 Calcined at ℃ for 2h, keep it for later use after natural cooling.

[0029] Soak the processed gl...

Embodiment 2

[0033] The arrangement of the glass beads in the photoreactor in Example 1 was changed to be flat on the bottom of the reactor, the packing density was 4 per 10cm, and the packing height was 2 layers. The specific arrangement is as Figure 4 Shown.

Embodiment 3

[0035] The arrangement of the glass beads in the photoreactor in Example 1 was changed to use a wooden stick with a diameter of 1mm to string the glass beads into strings, the glass beads were separated by 1cm; the glass beads were fixed by pasting on the glass mirror surface, and the beads Arranged in a triangle, spaced 1cm apart. The specific arrangement is as Figure 5 Shown.

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Abstract

The invention discloses a photoreactor for wastewater treatment. A mirror is adopted to form a trench-shaped photoreactor main body, and photocatalyst-supported glass beads are placed in the photoreactor main body in a suspending, supporting, accumulating or bottom tiling mode. The photoreaector has the advantages of avoiding of separation of a photocatalyst, reinforcement of the flow and the mass transfer of wastewater, simple and adjustable structure, low cost, no land occupation, and realization of photocatalytic degradation of the wastewater through directly using sunlight.

Description

Technical field [0001] The invention discloses a photoreactor for waste water treatment, in particular to the preparation of a photoreactor for waste water treatment. Background technique [0002] With the rapid economic development and the improvement of people’s living standards, various toxic and difficult-to-degrade pollutants such as drugs, pesticides, dyes, surfactants, heavy metals, and nitrites have entered the environment in large quantities, resulting in a decline in water quality and the occurrence of chemical water pollution incidents . At present, there is still a lack of effective treatment methods for the toxic organic wastewater that is difficult to biodegrade due to technical and economic reasons. To achieve the treatment of difficult-to-biodegradable wastewater, treatment methods should be selected based on different wastewater sources, properties and application feasibility. Among them, the photocatalytic technology for degradation by sunlight is the cheapest ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30B01J21/08B01J23/06B01J23/72B01J23/745B01J23/50
CPCY02W10/37
Inventor 蒋炜张婷婷曾娅袁绍军梁斌
Owner SICHUAN UNIV
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