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Bamboo charcoal modification method applicable to oily wastewater treatment

A technology of wastewater treatment and bamboo charcoal, which is applied in adsorption water/sewage treatment, separation methods, chemical instruments and methods, etc., can solve the problems of high operation cost, cumbersome operation process, large dosage of chemicals, etc., to avoid secondary pollution, use The effect of less amount and lower modification cost

Inactive Publication Date: 2014-04-09
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the chemical demulsification method as an example, this method is to add chemical reagents (acid, salt, flocculant) to the emulsion to destabilize and break the emulsion, and the oil droplets will coalesce to achieve oil-water separation. The effect of the chemical demulsification method is Well, the process is mature, but the dosage of chemicals is large and the operating cost is high
Although the above existing process can remove emulsified oil in wastewater, its operation process is relatively cumbersome and the operation cost is high

Method used

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  • Bamboo charcoal modification method applicable to oily wastewater treatment
  • Bamboo charcoal modification method applicable to oily wastewater treatment

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preparation example Construction

[0033] 2) Preparation of silane coupling agent alcohol solution: add silane coupling agent to 75%-100% ethanol solution, stir until it is completely dissolved, then add acid dropwise to adjust the pH to 4-5, the silane coupling agent used The octanol / water partition coefficient logK of the functional groups of the coupling agent (remaining groups after removal of silicon and methoxy / ethoxy groups) ow Values ​​greater than 1.0. The mass fraction of the silane coupling agent in the alcohol solution of the silane coupling agent is 0.5% to 1%, and the mixing ratio of the alcohol solution of the silane coupling agent and the bamboo charcoal is 30-75mL (alcohol solution) / g (bamboo charcoal);

[0034] 3) Soak bamboo charcoal and vibrate in a constant temperature water bath Modification system: Add bamboo charcoal to the above-mentioned silane coupling agent alcohol solution, soak bamboo charcoal at room temperature and under airtight conditions, then place it in a constant temperatur...

Embodiment 1

[0044] 1) After crushing the bamboo charcoal, pass through 10 mesh and 20 mesh screens to obtain bamboo charcoal particles with a particle size ranging from 10 to 20 mesh;

[0045] 2) Under room temperature conditions, the vinyl triethoxysilane coupling agent (it removes the octanol / water partition coefficient logK ow value of 1.13) was dissolved in 150mL100% ethanol solution, the content of silane coupling agent was 1% (mass fraction), and acid was added dropwise to adjust the pH of the solution to be 4-5;

[0046] 3) Add 2g of bamboo charcoal to the silane coupling agent alcohol solution, shake in a water bath shaker at 30°C for 20h, and set the shaker speed to 160rpm;

[0047] 4) After the shock is over, pour the bamboo charcoal mixed solution on the filter paper of the Buchner funnel, and separate the bamboo charcoal and the solution by suction filtration;

[0048] 5) Mix a certain amount of ethanol solution with a volume fraction greater than 75% and bamboo charcoal in a...

Embodiment 2

[0052] A kind of bamboo charcoal modification method that can be applied to oily wastewater treatment, specifically adopts the following steps:

[0053] 1) Prepare bamboo charcoal: crush commercially available bamboo charcoal and pass through 10-mesh and 20-mesh sieves to obtain 10-20 mesh bamboo charcoal;

[0054] 2) Preparation of silane coupling agent alcohol solution: add silane coupling agent to 75% ethanol solution, stir until it is completely dissolved, then add acid dropwise to adjust the pH to 4, the functional group of the silane coupling agent used Octanol / water partition coefficient logK of groups (groups remaining after removal of silicon and methoxy / ethoxy groups) ow Values ​​greater than 1.0. The massfraction of silane coupling agent in the alcohol solution of silane coupling agent is 0.5%, the mixing ratio of the alcohol solution of silane coupling agent and bamboo charcoal is 30-75mL (alcohol solution) / g (bamboo charcoal);

[0055] 3) Soak bamboo charcoal an...

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Abstract

The invention relates to a bamboo charcoal modification method applicable to oily wastewater treatment. The bamboo charcoal modification method comprises the steps: adding bamboo charcoal into a silane coupling agent ethanol solution so as to enable a silane coupling agent and hydroxyl groups on the surface of the bamboo charcoal to generate conjugation reaction, then separating, washing and drying the reacted bamboo charcoal, thus obtaining modified bamboo charcoal. Compared with the prior art, the bamboo charcoal modification method overcomes the defects that an existing commonly used coarse-grained filler modification method is infirm for the conjugation between hydrophobic substances and materials and has a great limit on the materials and the like; through contact angle tests and oil removal tests, the hydrophobicity of the modified bamboo charcoal is enhanced, the oil removal rate can be increased by 13%, and a resource approach can be provided for bamboo processing wastes.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a bamboo charcoal modification method applicable to the treatment of oily wastewater. Background technique [0002] With the improvement of people's living standards, the catering industry has developed rapidly. Catering wastewater is characterized by high oil content, and its oil content can reach hundreds of milligrams per liter. The direct discharge of oily wastewater into the environment will cause significant damage to the ecological environment, and the oil can cause poisonous effects on typical aquatic organisms. In addition, it also increases the difficulty of sewage treatment. Therefore, the treatment of oily wastewater, especially the removal of oil, is of great significance and has received extensive attention. [0003] Oil in water mainly exists in four forms, including slick oil (particle size generally greater than 100 μm), dispersed oil (part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/40
Inventor 黄翔峰胡萃邹小明申昌明陆丽君刘佳
Owner TONGJI UNIV
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