Method for removing algae by ultrasonic wave

An ultrasonic and ultrasonic technology, applied in the field of water treatment technology, can solve the problems of secondary pollution of algal toxins, high ultrasonic power, long release time, etc., and achieve the effect of wide application prospects, simple operation, and easy realization

Inactive Publication Date: 2008-05-21
FUZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, the treatment methods for algae mainly include methods such as fishing, flocculation, and chemical oxidation.
Utilizing the mechanical action of ultrasonic waves, it is also a common method to break algae cells through low-frequency and high-power ultrasonic treatment, but this method requires high ultrasonic power and long release time, and it is easy to release algal toxins in algal cells to form secondary secondary pollution

Method used

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  • Method for removing algae by ultrasonic wave
  • Method for removing algae by ultrasonic wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Take three groups of Microcystis aeruginosa liquids with the same concentration, 100ml each, adjust the output power to 80W, and irradiate them with ultrasound with a frequency of 200KHz, 500KHz and 1000KHz respectively, and the irradiation time is 10min. The algae liquid was placed in a light incubator, and the supernatant was taken every 24 hours to measure the absorbance.

[0017] (2) Take three groups of Microcystis aeruginosa liquids with the same concentration, 100ml each, and irradiate them with ultrasound with a frequency of 200KHz, 500KHz and 1000KHz respectively, the power is all adjusted to 50W, and the irradiation time is 10min. The algae liquid was placed in a light incubator, and the supernatant was taken every 24 hours to measure the absorbance.

[0018] The OD values ​​were measured with a UV spectrophotometer, see accompanying drawings 1 and 2.

[0019] It can be seen from Figure 1 and Figure 2 that the ultrasonic frequency has a great influence on...

Embodiment 2

[0025] (1) Take four groups of Microcystis aeruginosa with the same concentration, each 100ml, irradiate with 200KHz ultrasonic equipment, the power is 10W, 50W, 80W and 120W respectively, and the irradiation time is 10min, and the algae liquid that has been subjected to ultrasonic treatment is left to stand In the light incubator, the supernatant was taken every 24h to measure the absorbance.

[0026] (2) Take four groups of Microcystis aeruginosa with the same concentration, 100ml each, and irradiate with 500 KHz ultrasonic equipment, the power is 10W, 50W, 80W and 120W respectively, and the irradiation time is 10min. Placed in a light incubator, the supernatant was taken every 24h to measure the absorbance.

[0027] See accompanying drawing 3 and accompanying drawing 4.

[0028] It can be seen from Figure 3 that with the increase of ultrasonic power, the effect of ultrasonic algae removal also increases. When the power is 10W, the removal rate of the first day after ultras...

Embodiment 3

[0031] Take five groups of Microcystis aeruginosa with the same concentration, 100ml each, and irradiate them with ultrasonic equipment with a frequency of 500KHz and a power of 80W. The irradiation time is 1min, 5min, 10min, 15min, and 20min respectively. The solution was kept in a light incubator, and the supernatant was taken every 24 h to measure the absorbance.

[0032] At an ultrasonic power of 80W and a frequency of 500KHz, the changes in the concentration of Microcystis treated with different ultrasonic action times are shown in Figure 5.

[0033] It can be seen from Figure 5 that with the increase of ultrasonic time, the effect of ultrasonic algae removal is also enhanced. When the ultrasonic action time is 1 min, the algae removal rate on the first day after ultrasonic treatment is 66%, while when the ultrasonic action time is 2 min, the algae removal rate is 66%. The algae removal rate reached 85% on the first day after the ultrasonic treatment, but the removal rate...

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Abstract

The invention provides an algae removal method through ultrasonic waves, which is characterized in that the method uses the ultrasonic waves to destroy critical growth components during an algae growth logarithmic phase to remove the algae, which means to release the ultrasonic waves with 100KHz-1MHz of frequency and 0-200W of power, 5-10minutes per time and once every five days. The invention has the advantages of simple operating method, easy realization, no secondary pollution and high application value for treating algal bloom.

Description

technical field [0001] The invention belongs to the application field of water treatment technology, and more specifically relates to a method for removing algae in water by using ultrasonic waves. Background technique [0002] The arbitrary discharge of industrial and agricultural wastewater and domestic wastewater makes the eutrophication of the water body more and more serious, resulting in the proliferation of algae, leading to the deterioration of water quality, the serious degradation of water area functions, and the destruction of the biological chain and food web of the original ecosystem, resulting in the loss of biodiversity. . The algae release a large amount of algae toxins, which have a great poisonous effect on humans and animals, and cause serious harm to domestic water supply, affecting the water treatment process. The treated water has peculiar smell, blocks drainage pipes, culverts and filters, and damages water treatment facilities. , this issue has recei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/36
Inventor 苑宝玲舒天阁吴宝日
Owner FUZHOU UNIV
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