Method for removing water blue-green algae based on daphnia magna and method for purifying water area

A large daphnia and water body technology, applied in the field of water treatment, can solve the problems of complex domestication food formula, complex domestication methods, and inability to be widely used, and achieve the effects of suppressing outbreaks, improving transparency, and reducing simplicity

Inactive Publication Date: 2019-04-19
中国疾病预防控制中心环境与健康相关产品安全所 +1
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Problems solved by technology

However, this domestication method is too complicated, and the specific domestic...

Method used

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Effect test

Embodiment 1

[0039] Step 1) Evaluate the toxicity of water quality: first select the Daphnia magna offspring of the same age and the same mother who are healthy and big, cultivate 1 generation, and the young Daphnia born 6h are used to evaluate the water quality toxicity of the target water body; dilute the target with naturally aerated tap water The water sample is used as the test solution, the volume ratio of the target water sample to tap water is 1:9, the volume of each test solution is 200ml, and Daphnia magna is added. The amount of daphnia magna added is 500 young daphnia per 1L of the test solution, and cultured for 48 hours. Record the number of Daphnia magna that is still active, and when the activity inhibition rate of Daphnia magna is lower than 50%, it is to judge the acute toxicity of the target water body to Daphnia magna 48h C 50 ≥100mg / L, save the target water that meets the acute toxicity conditions for later use;

[0040] Step 2): Experimental domestication of daphnia m...

Embodiment 2

[0054] Step 1) Evaluate the toxicity of water quality: first select the Daphnia magna offspring of the same age and the same mother as healthy bodies, cultivate 3 generations, and the young daphnia born 24h are used to evaluate the water quality toxicity of the target water body; dilute the target with naturally aerated tap water The water sample is used as the test solution, the target water sample to tap water volume ratio is 1:9, the volume of each test solution is 1000ml, and Daphnia magna is added, and the addition amount of Daphnia magna is 200 young daphnia per 1L of the test solution, and cultivated for 48 hours. Record the number of Daphnia magna that is still active, and when the activity inhibition rate of Daphnia magna is lower than 50%, it is to judge the acute toxicity of the target water body to Daphnia magna 48h C 50 ≥100mg / L, save the target water that meets the acute toxicity conditions for later use;

[0055] Step 2): Experimental domestication of daphnia ma...

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Abstract

The invention relates to a method for removing water blue-green algae based on daphnia magna, aims at the problem of blue-green algae outbreak in lakes, reservoirs and other natural water due to the acceptance of domestic sewage, industrial wastewater and the like containing a large amount of nitrogen and phosphorus, and develops a biological method taking ecosystem restoration as a principle based on a food chain relationship between the daphnia magna and blue-green algae to remove the water blue-green algae. The first technical problem to be solved by the invention is acute toxicity evaluation of blue-green algae enriched water, the second technical problem to be solved by the invention is screening and domestication of large and healthy daphnia magna. The acute toxicity evaluation is adopted to assess the feasibility of daphnia magna treatment, and then the cultivation domestication of laboratory and on-site two stages enables the daphnia magna to grow and reproduce in the blue-green algae outbreak. The daphnia magna is utilized to ingest the blue-green algae to increase the concentration of dissolved oxygen in water and promote the growth of submerged plants. Furthermore, fishes, shrimps, snails and other high-grade organisms are introduced and the daphnia magna are used as bait to form a closed cycle, thereby restoring an original water ecosystem and eliminating blue-greenalgae pollution.

Description

technical field [0001] The invention relates to the technical field of water treatment, and is a water body and water area purification method based on the principle of ecosystem restoration, in particular to a method for removing cyanobacteria from a water body based on Daphnia magna and a method for purifying water areas. Background technique [0002] Cyanobacteria, also known as blue-green algae, is a class of long evolutionary history, negative Gram staining, no flagella, chlorophyll a, but no chloroplast (different from eukaryotic algae), capable of producing Large unicellular prokaryotes that perform oxygenic photosynthesis. The difference with photosynthetic bacteria is that photosynthetic bacteria (Rhodospirilla) perform relatively primitive photosynthetic phosphorylation, do not release oxygen during the reaction process, and are anaerobic organisms, while cyanobacteria can perform photosynthesis and release oxygen. Its development makes the entire earth's atmosphe...

Claims

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Application Information

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IPC IPC(8): C02F3/32
CPCC02F3/32
Inventor 潘力军刘航韩旭姚孝元康君波
Owner 中国疾病预防控制中心环境与健康相关产品安全所
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