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Method for treating organic wastewater by using microwave cooperated with bentonite

A technology of organic wastewater and bentonite, applied in the direction of adsorption water/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve the problems of unsatisfactory removal rate of organic pollutants, difficulty in meeting discharge standards, long equilibrium time, etc., to achieve treatment The effect of shortening time, improving removal efficiency and simplifying operation process

Inactive Publication Date: 2003-10-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this method is that organic bentonite needs to be activated at high temperature, and it takes a long time to reach the equilibrium of adsorbing organic pollutants, resulting in a long operation time for wastewater treatment, which is time-consuming and energy-consuming, and cannot be economically applied to the environmental protection industry.
In addition, the removal rate of organic pollutants is not ideal, and it is difficult to meet the emission standards for some refractory organic compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The acid scarlet dye wastewater was decolorized in a rectangular resonant cavity microwave reactor. Cationic organic bentonite is used, the organic modifier is cetylpyridinium chloride, the concentration of acid scarlet in the wastewater is 25 mg / L, and the mass ratio of organic bentonite to wastewater to be treated is 1:2000. The microwave power is 700W, after irradiating for a period of 2 minutes, cool to room temperature, the mixture of organic bentonite and waste water is separated from solid and liquid by centrifugation, and the water quality after treatment is colorless and clear, and the decolorization rate is over 99%.

Embodiment 2

[0021] The acid blue dye wastewater was decolorized in a rectangular resonant cavity microwave reactor, and the acid blue dye concentration in the wastewater was 25mg / L. Dication type organic bentonite is used, organic modifiers are cetylpyridinium chloride and tetramethylammonium bromide, and the mass ratio of organic bentonite to waste water to be treated is 1:1000. The microwave power is 700W, and after different time of irradiation, the organic bentonite and the waste water mixture are separated into solid and liquid by centrifugation. It has been determined that the decolorization rate has reached 90% after irradiation for 10s-50s, and the decolorization rate is above 99% after the irradiation time is extended to more than 1min.

Embodiment 3

[0023] The decolorization of acid yellow dye wastewater was carried out in a rectangular resonant cavity microwave reactor, and the constant temperature oscillation decolorization method was used as a comparison. The concentration of acid yellow dye in wastewater is 25mg / L. Dication type organic bentonite is used, organic modifiers are cetylpyridinium chloride and tetramethylammonium bromide, and the mass ratio of organic bentonite to waste water to be treated is 1:1000. The treated organobentonite and the waste water mixture are separated into solid and liquid by centrifugation. Microwave power 700W, irradiation 10s-2min, the decolorization rate is 97%. However, the decolorization rate of dye wastewater treated with the same amount of organic bentonite at constant temperature and oscillating for 30 minutes is only 34%.

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Abstract

A process for treating organic sewage with microwave and organic bentone includes mixing granular organic bentone with organic sewage proportionally, microwave reaction under 200-5000W of power of decolouring and cleaning, and solid-liquid separation. Its advantages are short time, high effect and simple process.

Description

technical field [0001] The invention relates to a method for treating organic waste water with microwave and organic bentonite. More specifically, in the microwave reactor, a higher organic pollutant removal rate can be obtained by dynamically adjusting key factors such as the amount of organic bentonite and microwave irradiation energy. Background technique [0002] Due to its good dispersibility and emulsification, organic bentonite is widely used as food decolorization and turbidity removal agent, cosmetic additive, oil drilling aid, etc. In recent years, people have made use of its adsorption properties and lipophilic and hydrophobic properties to apply organobentonite to the environmental protection industry to treat organic wastewater, and to improve the adsorption characteristics of bentonite from the innovation of organobentonite preparation and adsorption process routes. Due to the correct handling of the adsorption process and new The in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/48
Inventor 李济吾朱利中
Owner ZHEJIANG UNIV
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