Method for cooperative control of microcystis aeruginosa by using chub, bighead, silver xenocypris fish and daphnia magna

A microcystis aeruginosa and collaborative control technology, applied in the field of water treatment, can solve the problems of unable to effectively remove and inhibit Microcystis aeruginosa, and cannot effectively remove algae, so as to promote rapid mass reproduction, reduce growth pressure, and promote growth Effect

Active Publication Date: 2014-06-25
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the prior art poses a certain threat to the ecological balance of the water body and cannot effectively remove algae in each water layer of the water body, especially the problem that Microcystis aeruginosa cannot be effectively removed and inhibited for a long time, the present invention provides a kind of The method of synergistic control of Microcystis aeruginosa by fish and daphnia can establish a stable ecological balance, not only can realize all-round synergistic control of Microcystis aeruginosa at different depths of water bodies, the most important thing is to form a benign ecological regulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a eutrophic waters, the water depth is 2.6m, the flow velocity is 0.5m / s, the concentrations of TN, TP and chlorophyll in the water body are TN=1.2mg / L, TP=0.05mg / L, chlorophyll=12mg / m 3 , the stocking density of silver carp is 60g / m 3 , the density of bighead carp is 20g / m 3 , the density of pomfret is 40g / m 3 , the weight of a single silver carp is 60-150g, the weight of a single bighead carp is 40-120g, the weight of a single pomfret is 50-80g, and the density of a large daphnia is 30 / L. After a period of time, the water quality indicators of the water body remained relatively stable, and the removal rates of TN, TP, and chlorophyll reached 31%, 24%, and 64%, respectively. After two years of continuous operation, the amount of various organisms in the water remains stable.

Embodiment 2

[0026] In a eutrophic waters, the water depth is 3m, the flow velocity is 0.3m / s, the concentrations of TN, TP and chlorophyll in the water body are TN=1.6mg / L, TP=0.07mg / L, chlorophyll=26mg / m 3 , the stocking density of silver carp is 90g / m 3 , the density of bighead carp is 30g / m 3 , the density of pomfret is 60g / m 3 , the weight of a single silver carp is 60-150g, the weight of a single bighead carp is 40-120g, the weight of a single pomfret is 50-80g, and the density of a large daphnia is 35 / L. After a period of time, the water quality indicators of the water body remained relatively stable, and the removal rates of TN, TP, and chlorophyll reached 34%, 26%, and 68%, respectively. After two years of continuous operation, the amount of various organisms in the water remains stable.

Embodiment 3

[0028] In a eutrophic waters, the water depth is 2m, the flow velocity is 0.7m / s, the concentrations of TN, TP and chlorophyll in the water body are TN=1.9mg / L, TP=0.06mg / L, chlorophyll=48mg / m 3 , the stocking density of silver carp is 150g / m 3 , the density of bighead carp is 35g / m 3 , the density of pomfret is 70g / m 3 , the weight of a single silver carp is 60-150g, the weight of a single bighead carp is 40-120g, the weight of a single pomfret is 50-80g, and the density of a large daphnia is 40 / L. After a period of time, the water quality indicators of the water body remained relatively stable, and the removal rates of TN, TP, and chlorophyll reached 29%, 31%, and 71%, respectively. After two years of continuous operation, the amount of various organisms in the water remains stable.

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Abstract

The invention discloses a method for cooperative control of microcystis aeruginosa by using chub, bighead, silver xenocypris fish and daphnia magna, and belongs to the technical field of water treatment. The microcystis aeruginosa in water is controlled through a food chain relationship; the chub, the bighead, the silver xenocypris fish and the daphnia magna can directly eat the microcystis aeruginosa in a filtering manner; meanwhile, the chub, the bighead and the silver xenocypris fish also can intake the daphnia magna, so as to indirectly consume the microcystis aeruginosa in water; the fish, the daphnia magna and the microcystis aeruginosa form the food chain relationship. In addition, the upper, middle and lower microcystis aeruginosa and a microcystis aeruginosa resting body at the bottom can be controlled by fully utilizing the vertical spatial distribution difference of the three fishes in the water, the content of the microcystis aeruginosa in the water can be more effectively controlled, the eutrophication level is reduced, the balance of an ecological system of the water is facilitated, and meanwhile, certain economic value can be obtained by catching the chub, the bighead, the silver xenocypris fish. The method has the advantages of low cost, no secondary pollution and the like, and is simple and feasible.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for controlling Microcystis aeruginosa, more specifically, relates to the synergistic control of Microcystis aeruginosa by silver carp, bighead carp, pomfret and Daphnia magna Methods. Background technique [0002] Water algae "water bloom" has become a global environmental problem. It can cause great harm to the use of water resources, such as the drop of dissolved oxygen in water, and the algae toxins released by algae threaten the survival of organisms. Among them, aeruginosa microcapsules Algae is the main species of "water bloom", which dominates in quantity and outbreak frequency. How to control Microcystis aeruginosa has become a difficult problem for the majority of scientific researchers to solve the eutrophication of lakes. [0003] There are many existing algae removal methods. Mechanical algae removal can quickly and effectively remove al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
Inventor 张毅敏吴晗高月香杨飞汪龙眠周创
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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