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Method for cultivating diatom in summer

A diatom and culture container technology is applied in the field of phytoplankton culture to achieve the effects of promoting rapid growth, promoting a large number of attached growth and high growth density

Active Publication Date: 2021-03-26
FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no successful research on the formation of G. corydalis blooms under artificial control conditions by simulating ecological and environmental factors in rivers.

Method used

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  • Method for cultivating diatom in summer
  • Method for cultivating diatom in summer
  • Method for cultivating diatom in summer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1 (cultivation under the condition of outdoor natural light, diatom growth does not occur)

[0052] In warm June, high-concentration cyanobacteria blooms (microcystis blooms) accumulated on the water surface were obtained from the western shore of Taihu Lake, and the high-concentration cyanobacteria blooms were placed in plastic buckets, and then rotted and fermented at room temperature after the lid was closed , after 12 days of fermentation, the color of the cyanobacteria bloom becomes earthy yellow, and the particles of the cyanobacteria bloom become finer. Then filter the rotten cyanobacteria bloom with a 120-mesh screen, and use the filtered nutrient-rich solution for algae cultivation.

[0053] A plexiglass culture column with a conical lower part and a cylindrical upper part (the diameter of the upper cylindrical area is 40 cm) is used to place the algae under outdoor natural light conditions, and the total volume in the column is 80 L. A total of 6 p...

Embodiment 2

[0055] Embodiment 2 (the cultivation of cyanobacteria water as raw material, the photo of algae is Figure 1 to Figure 8 )

[0056] High-concentration cyanobacterial blooms (microcystis blooms) on the water surface were obtained from Meiliang Bay, Taihu Lake in high temperature July. The high-concentration cyanobacteria blooms were placed in plastic buckets and covered with lids, and then rotted and fermented at room temperature. After 10 days of fermentation , the color of the cyanobacteria bloom becomes yellower, and the particles of the cyanobacteria bloom become finer. Then use a 120-mesh sieve to filter the cyanobacteria bloom, and obtain the nutrient-enriched solution after filtering to remove particulate matter, which is used for algae cultivation. The freshly obtained algae culture solution is light yellow-brown.

[0057] Algae were cultivated in 3 water tanks of 120 cm x 70 cm x 70 cm in size that had been cleaned. The bottom and walls of the water tank were opaque,...

Embodiment 3

[0060] Embodiment 3 (the cultivation of cyanobacteria water as raw material, the photo of algae is Figure 9 ~ Figure 12 )

[0061] Obtain high-concentration cyanobacteria blooms (microcystis blooms) from aquaculture ponds in high-temperature August, place high-concentration cyanobacteria blooms in plastic buckets and cover them, and rot and ferment at room temperature. After 7 days of fermentation, cyanobacteria water The color of the blooms becomes yellower and the particles of cyanobacteria blooms become finer. Then use a 120-mesh sieve to filter the cyanobacteria bloom, and obtain the filtered rich nutrient solution for algae cultivation.

[0062] The culture container is 18 colorless and transparent glass cylinders with a size of 30cm×30cm×30cm. All 18 glass cylinders are placed in the glass greenhouse. The upper space of the glass cylinders is shaded by gray sunshade curtains. , The shading rate of the glass cylinder area is 96.6% to 97.4%. Add filtered cyanobacteria ...

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Abstract

The invention discloses a method for culturing diatom in summer. The method comprises the following steps: obtaining eutrophic water formed by rotting and fermenting natural organic matter, and regulating the transparency of the eutrophic water; transferring the eutrophic water into a culture container, and properly shading the culture container to form a relatively weak light condition; and culturing the eutrophic water in the culture container by utilizing the high-temperature condition in summer.

Description

technical field [0001] The invention relates to a method for cultivating phytoplankton, in particular to a method for cultivating diatoms in summer. Background technique [0002] Freshwater diatoms are important in many ways. Freshwater diatoms are nutrient-rich biological bait for aquatic animals, such as fish, shrimp, crab, mussels, especially their larvae. In addition to being widely used in aquatic bait, diatoms are widely used in biomedicine, bioremediation, chemical materials, nanotechnology, etc., and have extremely broad research and application prospects. [0003] Under natural conditions, in terms of seasonal succession of planktonic algae, diatoms tend to form a dominant position in the winter and spring seasons when the temperature is low, and cyanobacteria and green algae dominate in the summer and autumn seasons when the temperature is high. Low. With the general eutrophication of fresh water bodies, cyanobacteria blooms often appear in fresh water bodies, a...

Claims

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Application Information

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IPC IPC(8): C12N1/12C12R1/89
CPCC12N1/12
Inventor 王小冬田亿刘兴国刘子秋车轩顾兆俊陈晓龙王婕杨家朋
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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