Application of bulrush as algae inhibiting material

A technology of algae and reed, which is applied in the field of harmful algae control in natural water bodies, and can solve the problems of loss of water bodies for industrial and agricultural utilization, landscape, and breeding

Inactive Publication Date: 2004-11-03
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The eutrophication of the water body leads to the growth of algae, which makes the water body lose the functions of industrial and agricultural utilization, landscape, and breeding

Method used

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  • Application of bulrush as algae inhibiting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 0.2 kilograms of reeds were soaked in 400 milliliters of deionized water for 7 days and filtered, and the filtrate was concentrated to 100 milliliters. Take concentrated solution 1, 2, 3, 4, 5 milliliters and add respectively in 200 milliliters Microcystis aeruginosa culture liquid, after cultivating for 5 days, inhibition rate is respectively 42%, 78%, 94%, 97%, 99%.

[0013] Such as figure 1 As shown, the curves indicate that adding concentrates 1, 2, 3, 4 and 5 milliliters to 200 milliliters of algae culture solution respectively, after cultivating for 5 days, the inhibition rates were 42%, 78%, 94%, 97%, and 99%, respectively. It shows that the growth of algae has been substantially completely inhibited at 4 milliliters.

Embodiment 2

[0015] After 1 kg of reed was extracted with 2 liters of ethanol for 12 hours, 5 milliliters of the obtained extract was added to 200 milliliters of chlorella culture solution. After 5 days, the algae density was only 3% of that of the control group, that is, the inhibition rate was 97%.

[0016] After 1 kg of reed was extracted with 2 liters of ethanol for 48 hours, 5 milliliters of the obtained extract was added to 200 milliliters of chlorella culture solution. After 5 days, the density of algae was only 2.5% of that of the control group, that is, the inhibition rate was 97.5%.

[0017] After 1 kg of reed was extracted with 5 liters of ethanol for 12 hours, 5 milliliters of the obtained extract was added to 200 milliliters of chlorella culture solution. After 5 days, the density of algae was only 21% of that of the control group, that is, the inhibition rate was 79%.

[0018] After 1 kg of reed was extracted with 5 liters of ethanol for 48 hours, 5 milliliters of the obtained...

Embodiment 3

[0020] Bundle 15 grams of reeds into small bundles, put them into 3 liters of algae culture solution, and cultivate them under natural light and 25°C for 3 days, the density of chlorella is only 4% of that of the control group, that is, the inhibition rate is 96%. After the algae are suppressed, the reeds are taken out to avoid secondary pollution caused by the rotten reeds.

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Abstract

The present invention belongs to the field of water treating technology, and discloses the application of reed as algae inhibiting material. Reed as algae inhibiting material may be used through extracting algae inhibiting matter from reed with water or organic solvent and applying the extracted matter to the water to be treated; or setting bundled reed or reed in nylon bag into water to be treated. Utilizing reed as algae inhibiting material has the advantages of high algae inhibiting effect, low cost, easy control and high ecological safety. The present invention may be used in algae inhibition in natural or artificial water, such as lake, reservoir, river, park water, fish pond, etc.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a new method for controlling harmful algae in natural water bodies. Background technique [0002] Eutrophication of water body is the main reason for the deterioration of water environment. The eutrophication of the water body leads to the growth of algae, which makes the water body lose its functions such as industrial and agricultural utilization, landscape, and breeding. Existing anti-algae technology mainly utilizes copper ion (Cu 2+ ) herbicides to kill algae. However, copper ions cannot be degraded in water bodies, and will be transmitted in the ecosystem through the food chain, and the higher the trophic level, the higher the concentration of copper ions in organisms (biomagnification). If people eat aquatic animals rich in copper ions, it will endanger human health. Herbicides will kill other higher plants in the aquatic ecosystem while killing algae, destroying the aqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/44A01P13/00C02F1/50
Inventor 胡洪营李锋民
Owner TSINGHUA UNIV
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