Microwave assisted integrated process for synthesizing and treating oily wastewater by using organic bentonite

A bentonite and waste water technology, which is applied in adsorption water/sewage treatment, light water/sewage treatment, liquid separation, etc., can solve the problems of complex process and large energy consumption during treatment, and achieve accelerated integration, efficiency improvement, and efficient adsorption and purification. Effect

Inactive Publication Date: 2012-10-24
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 complex process and large energy consumption in the prior art, to provide a microwave synergistic organic bentonite synthesis-treatment oily wastewater integration process, using the thermal and non-thermal effects of microwaves, Realize the efficient adsorption and purification of refractory oily wastewater in a short time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The particle size is 20 order untreated bentonite and the cationic surfactant cetylpyridinium chloride of 20%CEC is added in the crude oil-containing wastewater, and the solid / liquid mass ratio of bentonite and oil-containing wastewater is 1:1000, and then Put 1L of the waste water into a microwave reactor with a power of 100W for 10s, stir for 2 minutes, and then use centrifugation to separate the solid / liquid two-phase. It is determined that the removal rate of oil in the waste water is greater than 95%.

[0021] The organobentonite modified by the same amount and the same type of cationic surfactant can only remove 35% of the oil in the same wastewater after adsorption for the same time without microwave action.

Embodiment 2

[0023] Be that the cationic surfactant cetyltrimethylammonium bromide of the untreated bentonite of 200 orders and 100%CEC join in the edible oil wastewater, the solid / liquid mass ratio of bentonite and oil wastewater is 1: 10000, then put 1L of the waste water into a microwave reactor with a power of 5000W for 1 min, and then stir for 3 min, and then use the free precipitation method for solid / liquid two-phase separation. It is determined that the removal rate of oil in the waste water is greater than 99%.

[0024] The organic bentonite modified by the same amount and the same type of cationic surfactant has only 48% of the oil removal rate in the same wastewater after adsorption for the same time without microwave action.

Embodiment 3

[0026] Add untreated bentonite with a particle size of 100 mesh and cationic surfactant chlorinated octaalkylpyridine with 80% CEC to the wastewater containing diesel oil. The solid / liquid mass ratio of bentonite and oily wastewater is 1:1000, and then 1L The waste water was placed in a microwave reactor with a power of 100W for 1 min, stirred for 3 min, and solid / liquid two-phase separation was carried out by means of free precipitation. It was determined that the removal rate of oil in the waste water was greater than 99%.

[0027] The organic bentonite modified by the same amount and the same type of cationic surfactant has only 39% of the oil removal rate in the same wastewater after adsorption for the same time without microwave action.

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Abstract

The invention relates to a microwave assisted integrated process for synthesizing and treating oily wastewater by using organic bentonite. The process includes adding the untreated bentonite with particle sizes of 20-200 meshes and a cationic surface active agent into the oily wastewater, subjecting the oily wastewater to microwave radiation for 10 seconds to 1 minute in a microwave reactor with power of 100W-5000W, stirring the wastewater for 2-3 minutes, finally performing solid / liquid two-phase separation and discharging the purified wastewater, wherein the usage amount of the cationic surface active agent is 20%-100% of cation-exchange capacity (CEC), and the solid / liquid mass ratio of the bentonite to the oily wastewater is (1:1000)-(1:10000). According to the microwave assisted integrated process for synthesizing and treating the oily wastewater by using the organic bentonite, thermal effects and non-thermal effects of microwave effects are used, so that the oily wastewater is firstly heated, the liquidity of oil is improved, the vibration of molecules is enhanced under the non-thermal effects, and efficient adsorption and purification of the refractory oily wastewater are achieved in a short time.

Description

technical field [0001] The invention relates to an integrated process of microwave synergistic organic bentonite synthesis-treatment of oily wastewater, which belongs to the technical field of sewage treatment in environmental protection. 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 oil. The particle size of the oil droplets is relatively large, generally greater than 100 μm. After standing still, it can float up quickly and float on the water s...

Claims

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Application Information

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