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A kind of harmless treatment method of algal bloom

A technology for harmless treatment and blooming of cyanobacteria, applied in chemical instruments and methods, multi-stage water/sewage treatment, light water/sewage treatment, etc., can solve problems such as no treatment method, resuspension of cyanobacteria, secondary pollution, etc. , to achieve the effect of easy implementation, promotion of flocculation and good treatment effect

Active Publication Date: 2014-10-22
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current chemical treatment method is mainly based on flocculation and sedimentation, which may easily cause the resuspension of cyanobacteria, or sink to the bottom to die and decompose to release toxins and organic nutrients, resulting in secondary pollution.
There is currently no effective way to deal with

Method used

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  • A kind of harmless treatment method of algal bloom
  • A kind of harmless treatment method of algal bloom
  • A kind of harmless treatment method of algal bloom

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Embodiment Construction

[0019] A harmless treatment method for blooming cyanobacteria,

[0020] 1. Choose a specific gravity of 0.2~0.8g / cm 3 Organic macromolecular light-weight flocculant, prepared into a mother liquor of flocculant with a concentration of 0.5-5g / L for later use;

[0021] 2. Set up interception nets around the work area;

[0022] 3. Detect the density of bloom cyanobacteria in the water body, when the density reaches 1×10 5 ~10 6 Ind / L, the pH value of the water body is between 10.0-11.0, the light intensity on the water surface exceeds 20000 Lux, and the wind force is less than 3, the prepared flocculant mother liquor is sprayed downwind at 0.25-3.0L per square meter of water surface while stirring the surface water body. The depth of the stirred water body is not less than 0.5 meters;

[0023] 4. After 1-2 hours, the blooming cyanobacteria in the water body flocculate into clusters. Under the action of strong sunlight, the air sacs formed by some of the cyanobacteria cells or the buoyancy...

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Abstract

A method for treating water bloom blue-green algae harmlessly includes: 1 choosing organic macromolecule light flocculant with proportion ranging from 0.2-0.8g / cm3 to prepare spare flocculant mother liquor; 2 setting an arresting barrier on the periphery of an operation area; 3 spraying the prepared flocculant mother liquor along the wind direction with 0.25-3.0L on each square meter of water surface and simultaneously stirring the surface layer water body when density of microcystis aeruginosa in a water body achieves 1*105-106ind / L, potential of hydrogen (pH) value of the water body ranges between 10.0-11.0, illumination intensity on water surface exceeds 20000Lux, and wind power is less than three levels; and 4 when the water bloom blue-green algae in the water body coagulates into cluster shape after 1 to 2 hours, and buoyancy generated by air sacs formed by partial blue-green algae cells or generated by increasing of the air sacs leads the whole flocculation groups to float on the water surface, and dredging the floating flocculated water bloom blue-green algae manually or mechanically. The method can remove the water bloom blue-green algae in water environment effectively, and is easy to implement and good in treating effect.

Description

Technical field [0001] The invention relates to a treatment technology for water bloom cyanobacteria, in particular to a harmless treatment method for water bloom cyanobacteria. Background technique [0002] As the water contains nitrogen and phosphorus, the cyanobacteria in lakes and ponds multiply to form blooms, which not only destroy the lake landscape, but also reduce the oxygen content of the water body. Some toxins released by the cyanobacteria seriously damage the water ecosystem and cause fish, shrimp and other aquatic organisms. Death also endangers human health and survival. The current chemical treatment methods used are mainly flocculation and sedimentation, which can easily cause the resuspension of cyanobacteria, or the death and decomposition of the sedimentation to release toxins and organic nutrients, resulting in secondary pollution. There is no effective treatment method yet. Summary of the invention [0003] The technical problem to be solved by the present ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F1/56C02F1/30
Inventor 朱明晏维龙
Owner HUAIHAI INST OF TECH
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