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Slow release type algal inhibition granules

A slow-release, granular technology, applied in the field of water treatment, can solve problems such as secondary pollution, and achieve the effect of suppressing outbreaks and controlling algae.

Pending Publication Date: 2017-11-07
南京中科水治理股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used measures in the treatment of river cyanobacteria are mostly chemical agents to kill algae, such as copper sulfate, strong oxides, etc., but they are all treated in the later stage, causing secondary pollution, and need to be applied repeatedly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A slow-release algae-inhibiting granule, including wheat straw as the main carrier and high-purity allelochemicals as additives. Wheat straws are crushed, soaked in the allelochemical solution, dried in the air, and then evenly mixed Allelopathic substances can be made into particles of different shapes through mixing and extrusion. When used in water bodies, it can be suspended on microbial attachment bases, biological membranes, and aquatic plants through small mesh bags.

[0018] The method comprises the steps of:

[0019] (1) Collect the discarded stalks after harvesting the wheat, and process them by drying, drying, and crushing to 100 mesh;

[0020] (2) The crushed wheat straw is soaked in a saturated aqueous solution of gallic acid for 48 hours, then aired and dried, and finally mixed with gallic acid evenly according to the weight ratio of wheat straw to gallic acid of 8:1;

[0021] (3) After evenly mixing gallic acid, kneading, extruding, and then placing it ...

Embodiment 2

[0025] It is basically the same as Example 1, except that rice straw is used and crushed to 150 meshes, the allelochemical is citric acid, the weight ratio of rice straw to citric acid is 9:1, and the shape of the particles is cube with a side length of 0.5 cm.

[0026] In a small river in Jiangsu. The application time is in mid-April. The average water depth of the river is 1 meter, the river width is 10-20 meters, and the length is 1.2 kilometers. The total nitrogen content of the water body is 3.8mg / L, the ammonia nitrogen content is 1.7mg / L, and the total phosphorus content is 0.37mg / L. In the past two years, whenever summer comes in the river, there will be large-scale algae blooms. After the implementation in mid-April this year, no algae blooms occurred in the inner river this year, and blue-green algae were significantly curbed.

Embodiment 3

[0028] It is basically the same as Example 1, except that corn stalks are used and crushed to 200 meshes, the allelochemicals are gallic acid, citric acid, and aconitic acid mixed in a weight ratio of 1:1:2, and the shape of the particles is cuboid , side length 0.6*0.8*1cm.

[0029] In a small pond in Jiangsu. The application time is in late April. The average water depth of the pond is 0.5 meters. The pond is irregular polygonal and covers an area of ​​12,000 square meters. The total nitrogen content of the water body is 6.5mg / L, the ammonia nitrogen content is 2.9mg / L, and the total phosphorus content is 0.62mg / L. For the past five years, whenever summer came to this pond, algae blooms would break out in the whole pond. After the implementation in mid-April this time, no water blooms occurred in the pond this year, and blue-green algae were significantly curbed.

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Abstract

The invention discloses slow release type algal inhibition granules. The slow release type algal inhibition granules are prepared by taking crop straw as a carrier and an allelochemical as an additive, crushing the straw, uniformly mixing the straw with the allelochemical and then pressing the mixture into the granules. When the slow release type algal inhibition granules are used in a water body, the slow release type algal inhibition granules can be suspended on a microorganism attachment substrate, a biological net film and a water plant through a small-size net bag. The slow release type algal inhibition granules have the advantages that an allelopathic algal inhibition principle of the plants is applied and an allelopathic effect is strengthened; the allelopathic effect strength in the water body is kept in a certain period and the burst of blue alga in the water body is inhibited; the slow release type algal inhibition granules belong to a blue algae pre-control means and can be used for effectively controlling the burst of the blue alga in the water body; compared with a present condition that the alga are killed by pesticides in a large scale after the burst of the blue alga, the method basically does not cause secondary pollution to the water body and the algal control effect is obvious.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a slow-release algae-inhibiting granule. Background technique [0002] With the growth of my country's population, the continuous development of industrialization and urbanization, and the continuous acceleration of urbanization, more and more industrial wastewater and domestic sewage enter the river in the form of point source or non-point source, resulting in continuous deterioration of water quality, and more and more Algal blooms occur in many river courses when the high temperature comes in summer, and the problem of blue-green algae bloom is becoming more and more serious. At present, the commonly used measures in the treatment of river cyanobacteria are mostly chemical agents to kill algae, such as copper sulfate, strong oxides, etc., but they are all post-treatment, there is secondary pollution, and they need to be applied repeatedly. [0003] Through the slow release of al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50
CPCC02F1/50C02F2103/007
Inventor 路丁王恒吴梅玲刘平平柴夏
Owner 南京中科水治理股份有限公司
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