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Method for controlling cyanobacteria bloom

A technology of cyanobacteria blooms and cyanobacteria, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of inability to ensure high microbial density, inability to ensure microbial activity, and reduce algae control Effects and other issues, to achieve good applicability and stability, maintain high-efficiency activity, and large biomass effects

Inactive Publication Date: 2011-07-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this time, the microorganisms are directly in contact with the natural water body, lack of protection, and have weak poison resistance, and the activity of the microorganisms cannot be guaranteed. Effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for controlling cyanobacteria blooms, characterized in that the following steps are adopted:

[0013] A) Collect water samples from the surface layer of natural waters where cyanobacteria have exploded, and store them in an ice bath. The water samples pass through microporous membranes with a pore size of 0.80 μm, 0.45 μm, and 0.22 μm in turn, and then concentrated by a tangential flow ultrafiltration system. The cyanophage concentrated solution should be stored in the dark at 4°C for later use; the concentration ratio of the above-mentioned cyanophage concentrated solution is 200 times;

[0014] B) Cut the degradable polyurethane foam into cubes with a side length of 5mm as a carrier, pass through a 16-mesh sieve to remove debris, wash with distilled water several times, and sterilize for later use. The cyanophage concentrate obtained in step A) is mixed with the opposite Several phases of Microcystis aeruginosa liquid were prepared into a mixed solution at a ...

Embodiment 2

[0018] A method for controlling cyanobacteria blooms, characterized in that the following steps are adopted:

[0019] A) Collect water samples from the surface layer of natural waters where cyanobacteria have exploded, and store them in an ice bath. The water samples pass through microporous membranes with a pore size of 0.80 μm, 0.45 μm, and 0.22 μm in turn, and then concentrated by a tangential flow ultrafiltration system. The cyanophage concentrated solution should be stored in the dark at 4°C for future use; the concentration factor of the above-mentioned cyanophage concentrated solution is 600 times;

[0020] B) Cut the degradable polyurethane foam into cubes with a side length of 5mm as a carrier, pass through a 16-mesh sieve to remove debris, wash with distilled water several times, and sterilize for later use. The cyanophage concentrate obtained in step A) is mixed with the opposite Several phases of Microcystis aeruginosa liquid were prepared into a mixed solution at ...

Embodiment 3

[0024] A method for controlling cyanobacteria blooms, characterized in that the following steps are adopted:

[0025] A) Collect water samples from the surface layer of natural waters where cyanobacteria have exploded, and store them in an ice bath. The water samples pass through microporous membranes with a pore size of 0.80 μm, 0.45 μm, and 0.22 μm in turn, and then concentrated by a tangential flow ultrafiltration system. The cyanophage concentrated solution should be stored in the dark at 4°C for later use; the concentration factor of the above-mentioned cyanophage concentrated solution is 400 times;

[0026] B) Cut the degradable polyurethane foam into cubes with a side length of 5mm as a carrier, pass through a 16-mesh sieve to remove debris, wash with distilled water several times, and sterilize for later use. The cyanophage concentrate obtained in step A) is mixed with the opposite Several phases of Microcystis aeruginosa liquid were prepared into a mixed solution at a...

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PUM

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Abstract

A method for controlling cyanobacteria bloom is characterized in that the method comprises the following steps: A) collecting a water sample of the surface layer of a natural water area where cyanobacteria bloom occurs, allowing the water sample to pass through a microporous membrane, and concentrating the water sample by an ultrafiltration system to obtain a phycophage concentrate; B) preparing a mixed solution of the phycophage concentrate and a log-phase microcystic aeruginosa solution with degradable polyurethane foam as a carrier, adding the mixed solution into a container, adding the carrier simultaneously to fix the phycophage on the carrier; C) adding the carrier into the natural water area where cyanobacteria bloom occurs with an adding amount of the fixed phycophage carrier being 0.5-1 kg per one square meter water area. Compared with the prior art, the invention has the following outstanding advantages: 1) the phycophage obtained from a water area where cyanobacteria bloom occurs has good applicability and stability; 2) the phycophage fixed on the carrier has a high density of biomass and a strong capability to resist noxious material impact, and can maintain high efficiency and activity. 3) the phycophage and the carrier is environment-friendly.

Description

technical field [0001] The invention relates to a water environment treatment method, in particular to a method for controlling cyanobacteria blooms. Background technique [0002] When the water quality is eutrophic, the cyanobacteria proliferate in large numbers, leading to water pollution, resulting in the lack of dissolved oxygen in the water, the death of aquatic organisms in large numbers, and the decay of organic matter, resulting in unpleasant odors around the lake. Currently, algae removal and algae control technologies are usually divided into physical methods, chemical and biological methods. Among them, biological methods mainly include algae control by fish, algae control by higher plants, algae removal by microbial flocculants, and algae control by adding biological reagents, etc., the effect is obvious, and it is economical and environmentally friendly; among them, biological reagents are mostly used to control algae. Bacteria, fungi or Viruses are expanded an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor 郭宗楼武海涛刘露黄朴徐立红
Owner ZHEJIANG UNIV
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