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Treating and recycling method of phenolic wastewater

A recycling and waste water technology, applied in water/sewage treatment, chemical instruments and methods, water treatment of special compounds, etc., can solve the problems of difficult separation, pollution of phenolic substances, high cost, etc., to reduce the content of pollutants, treat Low cost, good effect

Pending Publication Date: 2020-01-24
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the shortcoming of this patent is that the flocculant is added to the phenol-containing wastewater for flocculation, and then the solid-liquid separation is carried out, which actually pollutes the phenolic substances to be recovered.
At the same time, small molecule alcohol and / or ketone solvents are used for elution, which is costly and difficult to separate during elution, resulting in low recovery efficiency of phenols

Method used

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  • Treating and recycling method of phenolic wastewater

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Effect test

Embodiment 1

[0029] A method for the treatment and resource utilization of phenolic waste water, comprising the following steps:

[0030] (1) Pass the phenolic wastewater into the oil-water separator for oil-water separation treatment, then pump it into the adjustment tank to adjust the water quality to a pH value of 5, and then filter the solid particles through a precision filter to obtain the filtrate; the precision filter The filter material is PPR filter cotton, the quantitative is 500g / m 2 , the precision filter specification is 1 meter in diameter and 2.5 meters in length;

[0031] (2) step (1) gained filtrate is passed through 1# resin column and 2# resin column successively, the phenol in the filtrate is adsorbed on the resin column; After the phenol content reaches 1000mg / L in the drainage after the resin column adsorption, to A NaOH solution with a concentration of 0.5% is introduced into the resin column, and the amount of introduction is 2.5 times the volume of the resin colu...

Embodiment 2

[0035] A method for the treatment and resource utilization of phenolic waste water, comprising the following steps:

[0036] (1) Pass the phenolic wastewater into the oil-water separator for oil-water separation treatment first, then pump it into the adjustment tank to adjust the water quality to a pH value of 3, and then filter the solid particles through a precision filter to obtain the filtrate; the precision filter The filter material is PPR filter cotton, the quantitative is 400g / m 2 , the precision filter specification is 1 meter in diameter and 2.5 meters in length;

[0037] (2) step (1) gained filtrate is passed through 1# resin column and 2# resin column successively, and the phenol in the filtrate is adsorbed on the resin column; A KOH solution with a concentration of 0.6% was introduced into the medium, and the amount of introduction was 2 times the volume of the resin column. The alkaline solution reacts with the phenolic substances in the resin column to form a sa...

Embodiment 3

[0041] A method for the treatment and resource utilization of phenolic waste water, comprising the following steps:

[0042] (1) Pass the phenolic wastewater into the oil-water separator for oil-water separation treatment, then pump it into the adjustment tank to adjust the water quality to a pH value of 4, and then filter the solid particles through a precision filter to obtain the filtrate; the precision filter The filter material is PPR filter cotton, the quantitative is 600g / m 2 , the precision filter specification is 1 meter in diameter and 2.5 meters in length;

[0043] (2) step (1) gained filtrate is passed through 1# resin column and 2# resin column successively, and the phenol in the filtrate is adsorbed on the resin column; A KOH solution with a concentration of 0.6% is passed through the column, and the amount passed through is 2.2 times the volume of the resin column. The alkaline solution reacts with the phenolic substances in the resin column to form a salt and...

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Abstract

The invention provides a treating and recycling method of phenolic wastewater. The method comprises the following steps: subjecting phenolic wastewater to oil-water separation treatment; adjusting a pH value to 3-5 and then carrying out filtering; continuously carrying out resin column adsorption on a filtrate twice; when the content of phenol in discharged water obtained after the resin column adsorption reaches 800-1000 mg / L, performing desorption treatment on the resin column phenol; removing oil organic matters from wastewater obtained after resin adsorption; adjusting a pH value to 3-5; and carrying out micro-electrolysis treatment, Fenton oxidation treatment, coagulating sedimentation treatment and sequencing batch reactor (SBR) treatment to obtain clear water reaching the standard for reuse or discharge. According to the method disclosed by the invention, the content of phenolic substances in the wastewater can be effectively reduced to 0.5 g / L, so the wastewater can reach reuseand discharge standards; meanwhile, phenol in the wastewater is recycled, and the phenol recycling efficiency is 95%-99%, so the purpose of recycling resources is achieved.

Description

technical field [0001] The invention relates to a treatment and resource utilization method of phenolic wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] In my country's "blacklist" of toxic organic compounds that are prioritized for control, there are 14 categories and 68 species. It contains 7 kinds of phenols, and phenolic wastewater is one of the toxic wastewater stipulated by the state. Phenolic compounds are widely used in coal chemical industry, metallurgy, steel, ceramics, medicine, oil chemical industry and other industries, and become the preferred choice of phenolic wastewater. The main source, phenolic wastewater will cause serious harm to human body and organisms, so the discharge must be strictly controlled. [0003] At present, the treatment methods for wastewater containing phenols are mainly adsorption method, solvent extraction method, enzyme treatment technology, immobilized microorganism treatment technol...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/34
CPCC02F1/001C02F1/24C02F1/285C02F1/40C02F1/461C02F1/5281C02F1/66C02F1/722C02F1/725C02F3/1263C02F9/00C02F2001/007C02F2101/345C02F2305/026
Inventor 王正顺陈嘉川杨桂花姜在勇王源
Owner QILU UNIV OF TECH
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