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Alga control method and alga control agent for blue-green algae

A technology for cyanobacterial algae control and algae enzyme control, which is applied in chemical instruments and methods, water treatment parameter control, special treatment targets, etc. Growth, beneficial to photosynthesis, the effect of promoting plant growth

Active Publication Date: 2018-08-28
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Physical algae removal methods are easy to relapse, chemical algae killing has ecological risks, and biological algae control is slow to take effect. This technical solution is proposed

Method used

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  • Alga control method and alga control agent for blue-green algae
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  • Alga control method and alga control agent for blue-green algae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Algae killing experiment

[0073] First, add algae with a density of about 1.5×10 to six 1L reactors. 6 1 / L of algae liquid, then add the BM algae control enzyme with the final concentration of 0mg / L, 1mg / L, 2mg / L, 3mg / L, 4mg / L, 5mg / L respectively in the algae liquid, and 150r / L Mim assisted stirring for 2 minutes to make it evenly mixed; then left it for 30 minutes to measure the turbidity and chlorophyll a content of the water body, and calculate the turbidity and chlorophyll a removal rate, the results are shown in Table 1. It can be seen from Table 1 that the algicidal effect of BM algae control enzyme is good. When the dosage is 3.0mg / L, the removal rate of turbidity is 51.12%, and the removal rate of chlorophyll a reaches 93.67%. Increase the dosage , The removal rate of turbidity and chlorophyll did not increase significantly, so from the perspective of economy and environmental protection, 3.0mg / L was selected as the dosage of BM algae control enzyme.

[0074]...

Embodiment 2

[0077] Algae inhibition experiment

[0078] Prepare a stock solution of L-lysine with a concentration of 10 mg / mL for later use.

[0079] The density of algae loaded in the 1L reactor is about 1.5×10 6Add 3.0mg / L of BM algae control enzyme to each / L of Microcystis aeruginosa liquid, and add 0.1mL, 0.3mL, 0.5mL, 0.7mL, 1.0mL of L-lysine stock solution, add The amounts were 1.0mg / L, 3.0mg / L, 5.0mg / L, 7.0mg / L, 10.0mg / L, respectively. Among them, the algae liquid without adding the medicament was used as the blank group, and the algae liquid added with BM algae control enzyme (the dosage was 3.0 mg / L) and L-lysine (the dosage was 5.0 mg / L) alone was used as the blank group. control group. Stir with 150r / mim for 2 minutes to make it evenly mixed; then place it for 0.017d, 1d, 5d, 15d, 30d, 45d, 60d under the conditions of temperature 25°C, light intensity 2000lx, light-dark cycle 12h:12h Measure the content of chlorophyll a in the water body, calculate the removal rate of chlor...

Embodiment 3

[0081] Algae sinking experiment

[0082] 1L of initial algae density of 1.5×10 was added to 6 reactors respectively 6 Microcystis aeruginosa algae liquid per unit / L, carry out the operation of embodiment 2, wherein the dosage of BM algae control enzyme is 3.0mg / L, and the dosage of L-lysine is 5.0mg / L. Then add PAC flocculants with dosages of 5.0mg / L, 10.0mg / L, 20.0mg / L, 30.0mg / L and 40.0mg / L respectively into the reactor. Among them, the algae liquid without adding the drug was taken as the control group. Stir with 150r / mim for 2 minutes to make it evenly mixed; then, under the conditions of temperature 25°C, light intensity 2000lx, and light-dark cycle 12h:12h, measure the turbidity of the water body after standing for 30min, and calculate the turbidity removal rate. As shown in table 2. When the flocculant dosage is 20.0mg / L, the turbidity removal rate reaches 89.33%.

[0083] Table 2 The effect of different dosages of PAC flocculants on the removal rate of turbidity of...

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Abstract

The invention discloses an alga control method for blue-green algae and belongs to the technical field of environmental ecological engineering. The method comprises the steps of adding BM-alga controlenzyme and L-lysine into a microcystis aeruginosa liquid, conducting stirring and fully mixing the liquid uniformly; adding a flocculating agent into the mixed liquid and conducting stirring and thenstanding. The invention also provides an alga control agent used for the alga control method, and the alga control agent comprises BM-alga control enzyme and L-lysine. The provided method or the algacontrol agent can achieve large-scale treatment and have the advantages that an alga killing effect on the blue-green algae is achieved, the alga precipitation speed is high, the transparency of water body after treatment is high, the alga control time is long, the treatment cost is low and there is no secondary pollution.

Description

technical field [0001] The invention relates to the technical field of environmental ecological engineering, in particular to a cyanobacteria control method and an algae control agent. Background technique [0002] In recent years, with the intensification of eutrophication in water bodies, the frequency of cyanobacterial blooms in China and the world has gradually increased. In addition to large lakes such as Taihu Lake, Chaohu Lake and Dianchi Lake, there are also urban landscape water bodies, such as landscape lakes (Wuhan East Lake , Nanjing Xuanwu Lake); urban rivers (Beijing Changhe water system), have been reported. [0003] Landscape water bodies mainly include small rivers and lakes artificially constructed or transformed, which have become an important part of optimizing, beautifying and purifying the urban environment. At present, since most of these water bodies are artificially constructed or transformed, they are basically in a closed or semi-closed state, wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F1/52C02F9/14
CPCC02F1/5236C02F3/342C02F3/348C02F2103/007C02F2209/11C02F2303/20
Inventor 吴越刘丹妮任宁郭敏常江侯文华赵若楠
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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