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A kind of culture method that diatom growth appears in cyanobacteria Microcystis bloom

A technology of cyanobacteria blooms and cultivation methods, which is applied in the field of control of cyanobacteria Microcystis blooms, can solve the problems of no cyanobacteria blooms, increase the diversity of algae in water bodies, increase the stability of algae structures in water bodies, etc., and achieve simple methods Effect

Active Publication Date: 2020-08-25
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

Although the above studies analyzed the phenomena that occurred under specific conditions, they did not further study the formation of diatom dominance to control the formation of cyanobacteria blooms, enrich the corresponding algae control technology, and increase the diversity of algae in water bodies to increase the water quality. Algae structure is stable

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  • A kind of culture method that diatom growth appears in cyanobacteria Microcystis bloom
  • A kind of culture method that diatom growth appears in cyanobacteria Microcystis bloom

Examples

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Embodiment 1

[0022] In the hot July, the water surface of the aquaculture pond where the cyanobacteria bloom occurred was fished out with a 150-mesh filter to obtain the concentrated cyanobacteria bloom slurry, and then diluted with tap water to obtain the diluted cyanobacteria bloom, transfer the diluted cyanobacteria bloom to nine 10L transparent wide-mouth glass bottles, and the labels of the nine bottles are I, II, III, IV, V, VI, VII, VIII and IX . See Table 1 for the chlorophyll a, total nitrogen and total phosphorus concentrations of the diluted cyanobacteria blooms in the nine bottles. Microcystis biomass accounted for more than 99% of the initial cyanobacterial bloom, with only a small amount of Anabaena and Oscillatoria individuals.

[0023] Table 1: Chlorophyll a, total nitrogen and total phosphorus concentrations of cyanobacterial blooms in each glass bottle

[0024] Numbering Chlorophyll a (μg / L) Total Nitrogen (mg / L) Total phosphorus (mg / L) I 100.5 2.8...

Embodiment 2

[0028]In the hot August, the cyanobacteria Microcystis bloom (cyanobacteria bloom) was taken from the water surface of the aquaculture pond where the cyanobacteria bloom occurred with a 150-mesh filter to obtain the concentrated cyanobacteria bloom slurry, which was then diluted with tap water to obtain the diluted cyanobacteria blooms, transfer the diluted cyanobacteria blooms to six 10L transparent wide-mouth glass bottles, the labels of the six bottles are I, II, III, IV, V and VI in turn, and the six bottles The concentrations of chlorophyll a, total nitrogen and total phosphorus of the diluted cyanobacteria blooms are shown in Table 2.

[0029] Table 2: Chlorophyll a, total nitrogen and total phosphorus concentrations of cyanobacterial blooms in each glass bottle

[0030] Numbering Chlorophyll a (μg / L) Total Nitrogen (mg / L) Total phosphorus (mg / L) I 335.0 12.05 0.90 II 352.1 12.46 0.93 III 341.6 12.40 0.92 IV 450.6 15.83 1.26...

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Abstract

The invention discloses a culture method for diatom growth in cyanophyta microcystis water bloom. The method comprises the steps of firstly, concentrating and then diluting water where the cyanophytamicrocystis water bloom takes place through a filter screen and tap water respectively to obtain cyanobacterial water bloom, controlling the initial chlorophyll a concentration of the cyanobacterial water bloom at 310-500 Mug / L, and controlling the total nitrogen (TN) concentration and total phosphorus (TP) concentration of the cyanobacterial water bloom at 11.0-16.5 mg / L and 0.85-1.40 mg / L respectively; putting the cyanobacterial water bloom into an open vessel and carrying out air aeration in a shading environment, wherein the aeration amount is 0.3-0.5 m<3> / h, the shading rate of the environment is 80-85% of outdoor natural illumination, and the temperature of water in the open vessel is 19-36 DEG C; culturing the cyanobacterial water bloom for 1-100 days until diatom grows out from thecyanobacterial water bloom. The method is beneficial to increase of the advantages of the diatom in the cyanobacterial water bloom, increases the nutritional value of the cyanobacterial water bloom which is filtered and eaten by fishes, improves the diversity of algae in the water, and reduces the harm of cyanobacteria.

Description

technical field [0001] The invention relates to a method for controlling blooms of the genus Microcystis in the cyanobacteria, in particular to a method for cultivating diatom growth in the blooms of the cyanobacteria Microcystis. Background technique [0002] Cyanophyta Microcystis blooms are common algae blooms that are prone to occur in eutrophic water bodies such as freshwater shallow lakes, aquaculture ponds, and even many reservoirs in China. Moreover, cyanobacteria blooms are easy to accumulate on the water surface and emit odor, seriously affecting the landscape, and also affecting the function of the lake water body as a drinking water source, and its shipping, aquaculture and other functions are also adversely affected. From the aspects of aquaculture, landscaping, shipping, and water utilization of water bodies, cyanobacterial blooms, especially Microcystis blooms, are harmful. [0003] At present, the control methods of cyanobacterial blooms mainly include physi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/12C12N1/20C12R1/89C12R1/01
Inventor 王小冬刘子秋陆诗敏刘翀曾宪磊
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI