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Method for cooperatively treating low-concentration organic wastewater through adsorption and in-situ light regeneration

A technology for organic wastewater and collaborative treatment, which is applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, light water/sewage treatment, etc., can solve the problems of inability to exert fast kinetics of adsorption, and has good prospects for industrial application, but is not easy Effects of shedding and effective reuse of water resources

Pending Publication Date: 2021-11-19
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology, the "adsorption process" and the "photocatalytic degradation reaction process" are often carried out simultaneously, so that the adsorption balance is disturbed by photocatalysis, and the advantages of fast kinetics of adsorption cannot be exerted.

Method used

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  • Method for cooperatively treating low-concentration organic wastewater through adsorption and in-situ light regeneration
  • Method for cooperatively treating low-concentration organic wastewater through adsorption and in-situ light regeneration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The synthesis of two-dimensional sheet-like carbon nanosheets, the steps are as follows: 1.0 mmol pyridine-2,6-dicarbaldehyde, 2.0 mmol 1,4-diamidoxime benzene and 4.0 mmol cesium carbonate were mixed thoroughly, and 10.0 mL dimethyl sulfoxide and 0.5 mL of deionized water, stirred for 2 h to form a homogeneous solution, then transferred to a 20 mL reaction kettle, heated to 100 °C, and kept for 12 h. Subsequently, it was separated by centrifugation, washed with dilute HCl (concentration of dilute HCl solution was 5%), acetone and tetrahydrofuran for further separation and purification, and dried in a vacuum oven at 60 °C for 24 h to obtain two-dimensional sheet-like COFs. Finally, transfer the powder to a tube furnace, raise the temperature to 800 °C at 5 °C / min in an argon atmosphere and keep it for 2 h to obtain two-dimensional sheet-like carbon nanosheets (characterized by BET, the two-dimensional sheet-like carbon nanosheets The specific surface area of ​​carbon na...

Embodiment 2

[0056] The experimental process was repeated in Example 1, the only difference being that "in Example 1, 10 L of ethylene glycol aqueous solution (with a COD concentration of 58) at a concentration of 45 mg / L was replaced with 10 L of ethylene glycol with a concentration of 25 mg / L Benzophenone solution (COD concentration is 55)", all the other conditions are the same as in Example 1. After 6 hours of wastewater treatment, the solution in the circulating pool was sampled, and the concentration of benzophenone in the solution was detected by high performance liquid chromatography. The experimental results are summarized in Table 1.

Embodiment 3

[0058] The experimental process was repeated in Example 1, the only difference being that "in Example 1, 10 L of ethylene glycol aqueous solution (with a COD concentration of 58) at a concentration of 45 mg / L was replaced with 10 L of ethylene glycol with a concentration of 25 mg / L Benzaldehyde solution (COD concentration is 60)", all the other conditions are the same as in Example 1. After 6 hours of wastewater treatment, the solution in the circulating pool was sampled, and the concentration of benzaldehyde in the solution was detected by high performance liquid chromatography. The experimental results are summarized in Table 1.

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Abstract

The invention discloses a method for cooperatively treating low-concentration organic wastewater through adsorption and in-situ light regeneration. In the treatment process of low-concentration organic wastewater, wastewater is introduced into a circulating water tank, the wastewater immerses the bottom of a waterwheel drum, a pollutant bait serving as an adsorption-photocatalysis substrate is attached to the outer surface of the side wall of the waterwheel drum, and comprises a photocatalyst, the photocatalyst is a composite material constructed by loading a covalent triazine skeleton CTFs as the photocatalyst on a two-dimensional carbon nanosheet, the pollutant bait immersed in the wastewater on the waterwheel drum adsorbs organic matters in the wastewater, and along with the rotation of the waterwheel drum, the pollutant bait adsorbing the organic matters rotates above the water surface and is exposed in the sun, so that mineralization degradation of the organic matters under photocatalysis and regeneration of adsorption sites of the pollutant bait are realized. According to the invention, the method can further degrade the low-concentration organic wastewater, the wastewater treatment cost is low, water resources can be effectively recycled, and the industrial application prospect is good.

Description

technical field [0001] The invention relates to a method for synergistically treating low-concentration organic wastewater by adsorption and in-situ photoregeneration. Background technique [0002] In recent years, my country's urbanization process has been accelerating, and a large amount of urban sewage and industrial wastewater have poured into the sewage plant, resulting in an increasing load on the sewage plant. Due to the limited original treatment capacity of the sewage plant and more stringent effluent indicators, As a result, the sewage plant is overwhelmed, and the sludge problem is also difficult to deal with. At the same time, some sewage pipes have been in disrepair for a long time, with serious blockage and limited drainage capacity. [0003] The treatment process usually adopted for conventional industrial wastewater is pretreatment + activated sludge method + advanced treatment, and the treated wastewater reaches the standard for discharge or reuse. The trea...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/30H02J7/35B01J20/20B01J20/28B01J20/30B01J20/34C02F101/30
CPCC02F1/283C02F1/30H02J7/35B01J20/20B01J20/3078B01J20/28033B01J20/3416B01J20/3441C02F2209/08C02F2305/10C02F2101/30C02F2201/009C02F2303/16Y02P80/20Y02W10/37
Inventor 沈意朱超宋爽王军良
Owner ZHEJIANG UNIV OF TECH
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