Application of algicide for controlling microcystis flos-aquae

A technology of algicide and microcystis, which is applied in the field of algicide to kill and control microcystis blooms, can solve the problems of reduced safety of aquatic products, lack of effective algae control means, and death of aquatic animals, achieving Low concentration, high biological safety, no toxic and side effects

Active Publication Date: 2014-03-05
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, high-density intensive farming has caused deterioration of water quality in lakes and ponds and outbreaks of Microcystis blooms, resulting in the death of aquatic animals and reduced safety of aquatic products
At present, there is still a lack of effective means to control algae, and it is urgent to develop effective measures to control Microcystis blooms

Method used

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  • Application of algicide for controlling microcystis flos-aquae
  • Application of algicide for controlling microcystis flos-aquae
  • Application of algicide for controlling microcystis flos-aquae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of application of algicide in killing and controlling microcystis bloom, its steps are:

[0038] 1. In the summer of 2013, the applicant conducted a field test (about 10 liters of water bucket) in the fish pond where Microcystis blooms broke out at the Guanqiao test base of the Institute of Aquatics, and made two triclosan treatment groups (final concentration 5 mg / L and 15 mg / L) and two treatment groups of erythromycin (final concentration of 5 mg / L and 15 mg / L), each treatment group was done in three parallels, before adding triclosan and erythromycin Store them away from light.

[0039] 2. The treatment of triclosan with a final concentration of 5 mg / L is to add 0.5 ml of working mother liquid (for the configuration process of working mother liquid, please refer to the third step of this example) into three barrels and mix them evenly. Similarly, the final concentration is 15 mg / L triclosan is treated by dissolving 1.5 ml of working mother solution (tric...

Embodiment 2

[0047] Bioassay of Triclosan's Killing and Algicidal Activity against Microcystis under Culture Conditions

[0048] figure 1 and figure 2 The results of the bioactivity test of triclosan against microcystis: only 0.5mg / L (one millionth) concentration of triclosan can effectively inhibit the growth of microcystis under laboratory conditions; 1mg / L It can completely inhibit the growth of Microcystis.

[0049] Other implementation steps are the same as in Example 1.

Embodiment 3

[0051] Comparison of the activity of triclosan and the common algicide erythromycin against Microcystis under indoor culture conditions

[0052] image 3 Shows the comparison of the activity of triclosan and the commonly used algicide erythromycin in killing Microcystis under indoor culture conditions.

[0053] Other implementation steps are the same as in Example 1.

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Abstract

The invention discloses an application of an algicide for controlling microcystis flos-aquae. Organic carboxylic acids such as triclosan and succinic acids which are of tricarboxylic acid cyclic intermediates have the functions of killing and controlling the microcystis flos-aquae. Under an indoor experimental condition, 0.5ppm of triclosan has lethal effects on microcystis; under a field condition, 5ppm to 15ppm of triclosan is capable of killing microcystis flos-aquae colonies. Under an experimental condition, the succinic acids with concentration of 0.01% have the lethal effects on the microcystis; under the field condition, the succinic acids with concentration of 0.1% are capable of killing the microcystis flos-aquae colonies. The effects of malic acids and alpha-ketoglutaric acids come second; citric acids and fumaric acids also have the good function of dissolving the microcystis. The microcystis dissolving function of the organic carboxylic acids is carried out due to the main reason that the pH value of the organic carboxylic acids is decreased rapidly, i.e., the instant acidification is realized. The triclosan is mainly taken as a powerful algicide which is safe, nontoxic, environment-friendly, efficient and rapid in efficacy.

Description

technical field [0001] The invention belongs to the fields of water ecology, aquaculture water quality protection and water environment protection engineering, and specifically relates to the use of an algicide in killing and controlling microcystis blooms. Background technique [0002] With the rapid development of social economy and urbanization in our country, a large amount of urban domestic sewage, industrial wastewater and agricultural non-point source pollution are discharged into rivers and lakes, which accelerates the process of water pollution and eutrophication. Frequent outbreaks of toxic cyanobacteria (mainly Microcystis) blooms in lakes such as Taihu Lake, Chaohu Lake, and Dianchi Lake have endangered tap water supply and drinking water safety in many large and medium-sized cities. Microcystis blooms can cause water quality to deteriorate and stink. The microcystin released is a heptacyclic peptide, which is very stable (boiling cannot inactivate it) and highly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50C02F3/34
Inventor 邱东茹夏明柏仕杰
Owner INST OF AQUATIC LIFE ACAD SINICA
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