Method for inhibiting algal growth using ultrasonic wave

An ultrasonic and algae technology, applied in biochemical equipment and methods, using electricity/wave energy to treat microorganisms, unicellular algae, etc.

Inactive Publication Date: 2003-06-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The arbitrary discharge of industrial and agricultural wastewater and domestic sewage has made 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 toxins, which have a great poisonous effect on humans and animals, cause serious harm to domestic water supply, affect the water treatment process, the treated water has peculiar smell, block drainage pipes, culverts and filters, and damage water treatment facilities
This problem has been widely concerned. At present, various methods such as fishing and chemical agents are used to deal with this problem. However, these methods may cause secondary pollution, require complex equipment, high operating costs, and consume a large amount of labor, so they cannot be quickly solved. good application
At present, there is a treatment method that uses the mechanical action of ultrasonic waves to completely break algae cells through low-frequency and high-intensity ultrasonic treatment, but this method requires high ultrasonic intensity and long release time, and its effect is low compared with the input of manpower and material resources.

Method used

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  • Method for inhibiting algal growth using ultrasonic wave
  • Method for inhibiting algal growth using ultrasonic wave
  • Method for inhibiting algal growth using ultrasonic wave

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Table 1

[0022] It can be seen from Table 1 that the utilization frequency is 1.5-2.0MHz and the intensity is 0.5-0.6w / cm 2 Ultrasonic treatment of cyanobacteria can inhibit the growth of cyanobacteria, when the frequency is 1.7MHz, the intensity is 0.6w / cm 2 It has a better inhibitory effect on the growth of cyanobacteria.

Embodiment 2

[0025] Table 2

[0026] From Table 2 and figure 1 It can be seen from the figure that the OD value of group E treated in the logarithmic phase is close to that of the control group, and the growth resumes on the second day after treatment, the growth rate is equal to that of the control group, and the growth curve has been rising. No effect was apparent at the end of the trial. In group C, which received treatment during the stasis period, the growth was significantly inhibited during the whole process. After the culture period ended, its growth was only 47% of that of the control group, indicating that the physiological activities of cyanobacteria cells in the stagnant phase were still recovering, and their ability to resist external interference was weak. Ultrasonic treatment could make them receive more serious injury. The cyanobacteria cells in the logarithmic phase have vigorous metabolism, strong vitality, strong resistance ...

Embodiment 3

[0028] Treat each of the five groups of cyanobacteria culture fluids in the stagnation phase once, the frequency of the treatment is 1.7MHz, and the intensity is 0.6w / cm 2 , the treatment time of each group is different, respectively 1min, 3min, 5min, 7min, 9min, track the OD value of the whole culture period, draw its growth curve (OD value) control diagram, as figure 2 shown.

[0029] It can be seen from the figure that the growth of the group whose input time is 1 min is not affected, and maintains normal growth, and the growth rate and final biomass are the same as those of the control group; the growth of the group whose input time is 3 min is affected to a certain extent, and there is a short-term slow growth (1 to 2) days, it can still recover to a certain threshold quickly, and then grow at a normal growth rate, and the final biomass can reach more than 70% of the control group, and the inhibition effect is not ideal; the input time is 5min, 7min The three groups of ...

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Abstract

The method that uses ultrasonic to restrain the growth of alga belongs to environment control technology field with ultrasonic, especially refers to the field of controlling alga growth with ultrasonic. The character lies in that it transmits ultrasonic with 1.5-2.0 MHz frequencies and 0.5-0.6 w / cm to the power 2 to alga.

Description

Technical field: [0001] The method for suppressing the growth of algae by using ultrasonic waves belongs to the technical field of environmental management by using ultrasonic waves, and in particular relates to the technical field of environmental governance by using ultrasonic waves to suppress the growth of algae. Background technique: [0002] The arbitrary discharge of industrial and agricultural wastewater and domestic sewage has made 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 toxins, which have a great poisonous effect on humans and animals, cause serious harm to domestic water supply, affect the water treatment process, the treated water has peculiar smell, b...

Claims

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Application Information

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IPC IPC(8): C12N1/12C12N13/00
Inventor 吴庆余汤娇雯徐瀚郝宏伟陈以方吴敏生
Owner TSINGHUA UNIV
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