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Wastewater treatment and recycling technology based on UV photocatalytic oxidation

A photocatalytic oxidation and wastewater treatment technology, which is applied in the directions of oxidized water/sewage treatment, illumination water/sewage treatment, water/sewage treatment, etc., to achieve the effect of low cost of treatment equipment, remarkable effect and wide application range

Inactive Publication Date: 2015-02-11
上海银木电器制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited ultraviolet energy, this method can only be used for the treatment of wastewater with low COD value, but not for the treatment of wastewater with high organic matter pollution.

Method used

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  • Wastewater treatment and recycling technology based on UV photocatalytic oxidation
  • Wastewater treatment and recycling technology based on UV photocatalytic oxidation
  • Wastewater treatment and recycling technology based on UV photocatalytic oxidation

Examples

Experimental program
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Effect test

Embodiment 2

[0057] When containing heavy metal ion in waste water, the present invention comprises the following steps:

[0058] 1. Detect the composition, content and COD value of heavy metal ions in wastewater, and make records respectively;

[0059] 2. Determine the dosage of the catalyst and the ultraviolet irradiation time according to the COD value of the wastewater; the catalyst is TiO2, CdS, V2O5.

[0060] 3 Determine the composition and dosage of the replacement reagent according to the composition and content of heavy metal ions.

[0061] 4. Pass the waste water into the water storage tank, and add the catalyst in the water storage tank to mix the catalyst and the waste water evenly;

[0062] 5. Pass air or ozone into the uniformly mixed wastewater; the reaction device is the same as the UV photocatalytic oxidation reaction system in Step 4 in Example 1.

[0063] 6. The wastewater entering the reaction device is irradiated with ultraviolet radiation in the UVC~UVD band, prefer...

Embodiment 3

[0073] In Example 2, the removal of heavy metal ions in step 8 and the removal of organic matter by UV photocatalytic oxidation in step 6 can be interchanged, first remove heavy metal ions in wastewater, and then remove organic matter. It can avoid the situation that in the second embodiment, when the organic matter is removed in step 6, the heavy metal ions will also absorb part of the ultraviolet energy, avoiding the waste of ultraviolet energy, improving the energy utilization rate, and improving the decomposition efficiency.

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Abstract

The invention discloses a wastewater treatment and recycling technology based UV photocatalytic oxidation. The method comprises the following steps: a, detecting the COD value of waste water with a potassium dichromate method; b, determining the amount of catalyst and UV irradiation time according to the COD value of wastewater; c, adding the catalyst, evenly mixing the catalyst with wastewater; d, introducing air or ozone; e, introducing into a UV photocatalytic oxidation reaction device, and irradiating by ultraviolet; f, detecting the COD value of the liquid; if the COD value is lower than the emission standard, entering to the step g, and if the COD value is higher than the emission standard, returning to the step for re-reaction; and g, adjusting the pH value within 6 to 9; and h. discharging the treated wastewater. The technology provided by the invention makes pollutants completely harmless, and realizes more significant decomposition effect and the bulk chemical wastewater treatment of high concentration COD. The technology has the advantages of wide application range, no secondary pollution, green, environment-friendliness, and low cost of processing equipment.

Description

technical field [0001] The invention relates to a wastewater treatment and recycling method used in the field of industrial wastewater treatment, in particular to a wastewater treatment and recycling process based on UV photocatalytic oxidation. Background technique [0002] In industrial wastewater, it generally contains two kinds of impurities, inorganic matter and organic matter. The treatment methods of inorganic matter are relatively mature. The existing organic matter treatment methods include activated carbon adsorption, oxidation treatment, membrane treatment method, and ion exchange resin method. The organic matter removal rate of this method is generally 20% to 60%, the removal rate is low, and a large amount of activated carbon is required. Oxidation treatment is by adding an oxidant to the wastewater, and the removal rate of organic matter is related to this oxidant. The membrane treatment method separates the organic matter in the wastewater through a biofilm w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/72
CPCC02F1/32C02F1/725C02F2201/3227
Inventor 吴宇哲吴小来
Owner 上海银木电器制造有限公司
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