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Method for degrading phenol in wastewater

A technology of phenol and waste water, applied in the direction of chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., to achieve the effect of simplifying the operation procedure, shortening the treatment time, and shortening the treatment time

Inactive Publication Date: 2012-10-17
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Generally speaking, the activated sludge method is the most commonly used method to treat phenol-containing wastewater, because its operation is relatively simple and the treatment cost is relatively low. Well domesticated, it can only treat phenolic wastewater with a very low concentration

Method used

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  • Method for degrading phenol in wastewater
  • Method for degrading phenol in wastewater
  • Method for degrading phenol in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 The acquisition of phenol-degrading bacteria

[0017] Proceed as follows:

[0018] (1) Take the activated sludge polluted by phenol (the activated sludge in this example is taken from the aeration tank of the biological treatment plant of the coking plant of Benxi Iron and Steel Group Corporation), and shake the sludge sample on the shaker for about 2 hours , to break up the bacteria micelles and release free bacteria;

[0019] (2) Dilute the crushed activated sludge by 10-fold dilution method, spread it on beef extract peptone solid medium, and cultivate it at 32°C;

[0020] (3) Take out the above-mentioned cultivated plate samples, pick out the colonies with fast growth and bright fluorescence, and insert them into the beef extract peptone solid medium with a phenol concentration of 1500 mg / L, and keep the temperature at 32°C Incubate for 24 hours. Increase the concentration of phenol in the solid medium step by step to 3000mg / L;

[0021] (4) Inoculate...

Embodiment 2

[0028] Take 100mL water sample with a phenol concentration of 600mg / L in a 250mL Erlenmeyer flask, add 1.0g of activated carbon, and microwave in a microwave oven with a microwave power of 600W, and the microwave time is selected as 1, 2, 3, 4, and 5 minutes respectively. After the microwave was finished, take out the Erlenmeyer flask, cool to room temperature, filter, put the bacterial suspension of the strain h32a2 into the Erlenmeyer flask according to the inoculum amount of 1%, respectively, the pH is 7.5, and place it on a shaker for 24 hours at a constant temperature of 32°C. Determination of the removal rate of phenol after taking out, such as figure 2 .

[0029] Such as figure 2 It can be seen that the removal rate of phenol increases rapidly with the increase of time before the microwave irradiation time is 3 minutes, but the change range is not significant after 3 minutes. Therefore, the chosen reaction time was 3 min.

Embodiment 3

[0031] Take 100 mL of water sample with a phenol concentration of 600 mg / L in a 250 mL Erlenmeyer flask, add 1.0 g of activated carbon, and place it in a microwave oven with a microwave power of 600 W for 3 minutes. After the microwave was finished, take out the Erlenmeyer flask, cool it to room temperature, filter, put the bacterial suspension of strain h32a2 into the Erlenmeyer flask according to the inoculum amount of 1%, respectively, the pH is 7.5, and place it on a shaker for 24 hours at constant temperature for shaking culture, respectively set Set the shaker temperature at 24°C, 28°C, 32°C, 36°C and 40°C, and measure the removal rate of phenol after taking it out, as image 3 .

[0032] Such as image 3 As shown, when the temperature is 32°C, the removal rate of phenol reaches 97.83%. At the highest temperature of 40℃, the removal rate of phenol was low, only 65.03%. It can be seen from the figure that the phenol removal rate starts from the lowest temperature of 24...

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Abstract

The invention relates to a method for degrading phenol in wastewater. The technical scheme is as follows: the method comprises the following steps: adding 0.1-2.5g of activated carbon with particle sizes of 0.4-0.7mm into every liter of phenol-containing wastewater, and carrying out microwave treatment on the water sample, of which the phenol concentration is 600mg / L, under the microwave power of 600W for 1-5 minutes; and inoculating 1 vol% of phenol degrading bacterium into the wastewater at 24-40 DEG C, and carrying out oscillation culture under the pH value of 5.5-9.5 for 48 hours. The invention has the advantages of high speed, high efficiency, energy saving, consumption reduction, no secondary pollutant generation in the treatment process, obviously enhanced biochemical quality, favorable pollutant removal effect and obviously higher effluent water quality, and is simple to operate.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a treatment method for high-concentration phenol in waste water. Background technique [0002] Phenol, also known as carbolic acid and hydroxybenzene, is the simplest phenolic organic compound, a weak acid. It is a colorless crystal at room temperature and is poisonous. Phenol is a common chemical that is an important raw material for the production of certain resins, fungicides, preservatives, and pharmaceuticals such as aspirin. Phenol is corrosive, slightly soluble in water at room temperature, and easily soluble in organic solutions; when the temperature is higher than 65°C, it can be miscible with water in any proportion. Phenol has a strong corrosive effect on the skin and mucous membranes, can inhibit the central nervous system or damage the liver and kidney functions. Inhalation of high concentration vapor can cause headache, dizziness, fatigue, blurred vision, pulmonary ede...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/34C02F1/30C02F1/72C02F101/34
Inventor 孟雪莲徐成斌马溪平包坤李瑶瑶牟安逸
Owner LIAONING UNIVERSITY
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