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Integrated process for treating oily wastewater by microwave and ultrasonic wave collaborated with organic bentonite synthesis

A bentonite and ultrasonic technology is applied in the field of microwave and ultrasonic synergistic organic bentonite synthesis-treatment of oily wastewater integration process, which can solve the problems of complex process and high energy consumption, and achieve the effects of efficient removal, improved efficiency, and promotion of oil-water separation.

Inactive Publication Date: 2012-10-31
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is: to overcome the disadvantages of high energy consumption and complex process in the prior art, and to provide an integrated process of synthesizing organic bentonite with microwave and ultrasonic waves and treating oily wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The cationic surfactant cetylpyridinium chloride that particle size is the untreated bentonite of 10 orders and 20%CEC joins in the crude oil wastewater containing higher concentration, and the solid / liquid mass ratio of bentonite and oily wastewater is 1: 1000, then put 1L of the waste water into a microwave reactor with a power of 5000W for 1min, and then apply an ultrasonic wave with a frequency of 120KHz and a power of 1200W. The ultrasonic treatment is carried out for 5min and stirred at the same time. After the ultrasonic treatment is completed, stir for 3min, and then Centrifugal separation is used for solid / liquid two-phase separation. It is determined that the removal rate of oil in wastewater is greater than 99%.

[0025] The organobentonite modified by the same amount and the same type of cationic surfactant can only remove 30.9% of the oil in the same wastewater after adsorption for the same time without the action of microwave and ultrasonic waves.

Embodiment 2

[0027] Add the untreated bentonite with a particle size of 200 mesh and the cationic surfactant cetyltrimethylammonium bromide with 120% CEC to the wastewater containing diesel and edible oil, the solid / liquid mass ratio of bentonite and oily wastewater 1:10000, then put 1L of the waste water into a microwave reactor with a power of 100W for 10s, then apply ultrasonic waves with a frequency of 20kHz and a power of 100W, and perform ultrasonic treatment for 10s, while stirring, and then stir after the ultrasonic treatment After 2 minutes, the solid / liquid two-phase separation is carried out by filtration. It is determined that the removal rate of oil in the wastewater is greater than 99%.

[0028] The organic bentonite modified by the same amount and the same type of cationic surfactant has only 41.2% of the oil removal rate in the same wastewater after adsorption for the same time without the action of microwave and ultrasonic waves.

Embodiment 3

[0030] The particle size is 20 order untreated bentonite and the cationic surfactant chloride dodecylpyridine of 80%CEC joins in containing crude oil and diesel oil waste water, and bentonite and waste water solid / liquid mass ratio are 1:1000, then Put 1L of the waste water into a microwave reactor with a power of 5000W for 10s, and then apply an ultrasonic wave with a frequency of 120KHz and a power of 800W. The ultrasonic treatment will be performed for 3 minutes and stirred at the same time. The solid / liquid two-phase separation is carried out by the method, and the removal rate of oil in the wastewater is greater than 99%.

[0031] The organobentonite modified by the same amount and the same type of cationic surfactant has only 34.6% of the oil removal rate in the same wastewater after adsorption for the same time without the action of microwave and ultrasonic waves.

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Abstract

The invention relates to an integrated process for treating oily wastewater by microwave and ultrasonic wave collaborated with organic bentonite synthesis, which comprises the following steps of: adding untreated bentonite with grain size of 10-200 meshes and a cation surfactant into the oily wastewater, wherein the dosage of the cation surfactant is 20-120%CEC, the mass rate of solid to liquid of the bentonite and the oily wastewater is between 1: 1000 and 1: 10000; introducing the wastewater into a microwave reactor with power of 100-5000W and performing microwave radiation for 10 seconds to 1 minute; applying ultrasonic wave with frequency of 20-120KHz and power of 100-1200W; performing ultrasonication for 10 seconds to 5 minutes; purifying and stirring; stirring again for 2-3 minutes after ultrasonic processing; separating a solid phase and a liquid phase; and discharging the purified wastewater. By means of synergy of microwave and ultrasonic wave, time of treating the oily wastewater is shortened, and efficiency is improved.

Description

technical field [0001] The invention relates to a microwave and ultrasonic synergistic organic bentonite synthesis-treatment oily wastewater integration process, specifically, in a microwave reactor and an ultrasonic reactor, organic bentonite is simultaneously synthesized and removed through the auxiliary and synergistic action of microwave and ultrasonic waves Oily pollutants in oily wastewater. Background technique [0002] Oily wastewater is a kind of wastewater with large volume and wide area, which is extremely harmful. It mainly comes from petroleum extraction and processing, petrochemical industry, metallurgy, machinery industry, textile, food processing industry and marine transportation industry, etc. Its main components include: hydrocarbons, fuel oil, tar, lubricating oil, fatty oil, wax grease, soap, etc. The oil in wastewater mainly includes the following types: [0003] (1) Oil slick: Most of the oil that enters the water body exists in the form of slick oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F1/28C02F1/30C02F1/36
Inventor 马建锋姚超李定龙邹静
Owner CHANGZHOU UNIV
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