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A high-efficiency treatment method for high-concentration organic wastewater

A technology for organic wastewater and treatment methods, which is applied in water/sewage treatment, water/sewage multi-stage treatment, special compound water treatment, etc. It can solve the problem of narrow band gap, achieve high solar energy utilization, and improve photodegradation performance. , the effect of improving the separation efficiency

Active Publication Date: 2020-10-23
泰州禾益新材料科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most studied photocatalyst semiconductor material is TiO 2 , but TiO 2 The bandgap width of the photocatalyst is narrow, 3.2eV, and it can only absorb ultraviolet light in sunlight. How to extend the photoresponse range of photocatalysts to the visible light region is a hot spot in practical application research.

Method used

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Embodiment 1

[0022] The graphite phase carbon nitride (g-C 3 N 4 ) dispersed in chloroform, adding a certain amount of thiophene monomer, with FeCl 3 As a catalyst, stirred and polymerized at room temperature for 20 hours to obtain polythiophene-modified graphitic carbon nitride (g-C 3 N 4 ); the polythiophene-modified graphitic carbon nitride (g-C 3 N 4 ) in deionized water, stirred to form a dispersion, ultrasonically dispersed, and sterilized by ultraviolet light; the bacterial cellulose culture solution was prepared, adjusted to pH 5, and sterilized for 30 minutes; the polythiophene-modified graphite phase carbon nitride (g-C 3 N 4 ) dispersion liquid was added to the bacterial cellulose culture medium, ultrasonically pulverized by an ultrasonic cell pulverizer, inoculated with Acetobacter xylinum species, and cultured with shaking at 25°C for 6 days to obtain bacterial cellulose-coated composite graphitic carbon nitride (g-C 3 N 4 ) / polythiophene; pressurized to form a film to ...

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Abstract

The invention relates to an efficient treatment method for high-concentration organic wastewater and belongs to the field of water treatment. By combining the traditional adsorption method with the photocatalytic method, the bacterial cellulose adsorbent is composited with visible light-responsive semiconductor graphite phase carbon nitride (g-C3N4) to form a film, and the porous and large specific surface properties of the adsorbent are used to adsorb a large amount of pollutants in wastewater. organic matter, and then photocatalytically degrades the organic matter adsorbed on the surface, converting the organic matter into pollution-free CO 2 and water, and at the same time, the active sites of the adsorbent can be regenerated to continue to exert the adsorption effect and achieve long-term operation. The COD of the high-concentration organic wastewater treated by the method of the present invention can be reduced to 80 mg / L, which meets the national discharge standards. The bacterial cellulose-coated composite graphite phase carbon nitride (g-C3N4) / polythiophene membrane has been operated for 1000 hours without significant decline in adsorption and degradation performance.

Description

technical field [0001] The invention relates to a high-efficiency treatment method for high-concentration organic wastewater, which belongs to the field of water treatment. Background technique [0002] The treatment of organic wastewater has been paid attention to since the 1970s. Various treatment methods have emerged one after another, and some have been applied in production. These methods include adsorption, photocatalysis, biodegradation, membrane separation and so on. Among them, the adsorption method and the photocatalytic method have received widespread attention due to their low equipment requirements and simple operation. [0003] Adsorption method is to use porous solid adsorbent to adsorb and remove organic pollutants in wastewater. Commonly used adsorbents include activated carbon, activated alumina, silica gel, zeolite molecular sieve and so on. However, the adsorption capacity of the above-mentioned adsorbents is far from meeting the existing high-concentrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08B01J20/26B01J20/28B01J31/06B01J35/06C02F1/30C02F101/30
CPCC02F1/30C02F1/5236B01J20/262B01J20/28033B01J31/06C02F2305/10C02F2101/30B01J35/59B01J35/39
Inventor 周诗健
Owner 泰州禾益新材料科技有限公司
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