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Breeding method of freshwater diatoms

A cultivation method and algae cultivation technology, applied in the field of freshwater diatom cultivation, can solve the problems of long time, low diatom density, poor effect, etc., and achieve the effects of abundant sources, simple and clear methods, and clear ideas.

Active Publication Date: 2021-09-24
FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention aims to solve technical problems such as low diatom density, long time and poor effect in the process of recycling cyanobacteria blooms in the prior art.

Method used

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  • Breeding method of freshwater diatoms
  • Breeding method of freshwater diatoms
  • Breeding method of freshwater diatoms

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Fish fresh cyanobacteria Microcystis blooms from aquaculture ponds where cyanobacteria blooms occur in hot July to obtain concentrated cyanobacteria bloom slurry, and place the concentrated Microcystis bloom slurry in a 100L glass greenhouse In the glass jar, the chlorophyll a concentration after the water bloom slurry was stirred evenly at the beginning was measured to be 58000 μg / L. A sufficient amount of hydrochloric acid is added to the Microcystis bloom slurry, and the pH value of the Microcystis bloom slurry after adding hydrochloric acid is controlled to be 2.5. Add 1 aeration head to the water bloom slurry for weak air aeration, and the aeration intensity (indicated by aeration volume) is 0.3m 3 / (h·10L algae). During the 3 days of aeration, it can be seen that the Microcystis bloom has turned white, and the color is not as green as before, but the dark green has not appeared in the water body. By the 5th day of aeration, the Microcystis bloom has Clearly off-...

Embodiment 2

[0055] Fish fresh Microcystis blooms from the water bodies where cyanobacteria blooms occurred in early September to obtain concentrated Microcystis bloom slurry, and place the concentrated Microcystis bloom slurry in a 12L plastic container In the bucket, the bucket is placed in an open room. It was measured that the chlorophyll a concentration after the water bloom slurry was evenly stirred at the beginning was 4330 μg / L. And add a sufficient amount of hydrochloric acid to the Microcystis bloom slurry, control the pH value of the Microcystis bloom slurry after adding hydrochloric acid to 3.0, and carry out aeration with an aeration rate of 0.1m 3 / (h·10L algae). After 5 days of aeration, it can be seen that the Microcystis bloom has slightly turned white, and the Microcystis bloom has a light white color. At this time, the slightly whitened Microcystis bloom was taken out and diluted with tap water, and the diluted Microcystis bloom was placed in a 5L wide-mouth glass bott...

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Abstract

The invention discloses a method for cultivating freshwater diatoms, which comprises the following steps: obtaining fresh Microcystis blooms; controlling the initial chlorophyll a concentration of the Microcystis blooms to be 4000-60000 μg / L; The Microcystis bloom is placed in an environment with a temperature of 18-42°C, and the pH value of the Microcystis bloom is reduced to 2.5-3, and the aeration rate is 0.1-0.3 cubic meters / (hour Carry out air aeration under the condition of 10 liters of algae) 4~6 days; Dilute described Microcystis bloom, make the chlorophyll a concentration of described Microcystis bloom be 600~1000 μ g / L; Under the condition of 0.4~0.8 cubic meters / (hour·10 liters of algae), carry out air aeration to described Microcystis bloom for 12~16 days; When described Microcystis bloom water body turns brown, described Microcystis blooms are cultivated into fine particles of diatom clusters, and the volume of diatom particles in the water reaches 7-15mL / L after half an hour of precipitation.

Description

technical field [0001] The invention relates to the technical fields of water body eutrophication and cyanobacteria bloom control, and aquaculture technology, and in particular to a method for cultivating freshwater diatoms. Background technique [0002] Cyanophyta Microcystis blooms (cyanobacteria blooms that occur in inland water bodies in China are mainly Microcystis blooms) are a kind of harmful algae blooms that widely appear in freshwater water bodies in my country. Many aspects such as management, landscape and tourism, and aquatic product production have caused serious harm, and effective control and governance are urgently needed. [0003] Although the research on the mechanism of harmful algal blooms has made great progress, there are still many unknown mysteries. The ability of Microcystis to outcompete other algae is related to its multiple abilities in terms of maximizing growth and minimizing losses. Moreover, Microcystis blooms have significantly different mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/12C12R1/89
CPCC12N1/12
Inventor 王小冬刘子秋
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI