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Superfine powder flocculant for treating algae in eutrophic water body and preparation method thereof

An ultra-fine powder, nutrient-rich technology, used in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Poor stability and other problems, to achieve long-lasting algae removal effect, improve stability, and facilitate industrial production.

Active Publication Date: 2020-11-03
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above existing technical solutions have the following defects: the algal bloom flocs formed by the commonly used flocculants are loose and have poor settling properties, and the algae have phototaxis and are easy to float up, so it is easy to make the algal bloom flocs formed by the algae and the flocculants The poor stability of flocculants makes it easy for algae to separate from algal bloom flocs and re-float to the surface of the water body, thereby easily affecting the algae removal efficiency of flocculants. Therefore, there is still room for improvement

Method used

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  • Superfine powder flocculant for treating algae in eutrophic water body and preparation method thereof
  • Superfine powder flocculant for treating algae in eutrophic water body and preparation method thereof
  • Superfine powder flocculant for treating algae in eutrophic water body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A method for preparing an ultrafine powder flocculant for treating algae in nutrient-rich waters, comprising the following steps:

[0070] Step (1), prepare attapulgite powder, specifically as follows:

[0071] Put the attapulgite in an industrial calcining kiln, and carry out calcination at a temperature of 450°C for 1.5 hours, then crush the attapulgite, pass through a 200-mesh sieve, and re-grind the attapulgite that cannot be sieved until all All the attapulgite powders pass through a 200-mesh sieve to obtain the attapulgite powder with a particle size less than or equal to 200 mesh.

[0072] Step (2), mixing, is as follows:

[0073] Add 30kg of polyaluminum chloride and 20kg of water into a 100L stirred tank, and stir at a speed of 240r / min to dissolve the polyaluminum chloride to form a solution, then add the attapulgite powder prepared in step (1) while stirring 5kg, 3kg of resveratrol, 1kg of lauryl methacrylate, and 1.5kg of silicone oil were stirred and mixe...

Embodiment 2

[0077] The difference with embodiment 1 is:

[0078] Step (2), mixing, is as follows:

[0079] Add 35kg of polyaluminum chloride and 17.5kg of water into a 100L stirred tank, and stir at a speed of 240r / min to dissolve the polyaluminum chloride to form a solution, then add the attapulgite obtained in step (1) while stirring 4kg of powder, 2kg of resveratrol, 0.5kg of lauryl methacrylate, and 1.25kg of silicone oil were stirred and mixed evenly, then the temperature was raised to 60°C, and the mixture was reacted for 23 minutes to form the first mixture.

[0080] The drying temperature in step (3) is 85° C., and the drying time is 13.5 hours.

Embodiment 3

[0082] The difference with embodiment 1 is:

[0083] Step (2), mixing, is as follows:

[0084] Add 40kg of polyaluminum chloride and 15kg of water into a 100L stirred tank, and stir at a speed of 240r / min to dissolve the polyaluminum chloride to form a solution, then add the attapulgite powder prepared in step (1) while stirring 3kg, 1kg of resveratrol, 0.75kg of lauryl methacrylate, and 1kg of silicone oil were stirred and mixed evenly, then the temperature was raised to 70° C., and reacted for 15 minutes to form the first mixture.

[0085] The drying temperature in step (3) is 90° C., and the drying time is 13 hours.

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Abstract

The invention relates to the technical field of sewage treatment, and relates to an ultrafine powder flocculant for treating algae in eutrophic water, which comprises the following components by mass:30-40 parts of polyaluminum chloride; 15-20 parts of water; 3-5 parts of attapulgite; 1-3 parts of resveratrol; 0.5-1 parts of lauryl methacrylate; and 1-1.5 parts of silicone oil. The preparation method comprises the following steps: (1) preparing attapulgite powder; (2) performing mixing; and (3) performing drying. The flocculant has the advantages that algae in a water body can be removed morethoroughly, and the algae removal effect of the flocculating agent is more lasting and long-acting.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an ultrafine powder flocculant for treating algae in nutrient-rich water bodies and a preparation method thereof. Background technique [0002] At present, water eutrophication refers to that under the influence of human activities, a large amount of nutrients such as nitrogen and phosphorus required by organisms enter lakes, rivers, bays and other slow-flowing water bodies, causing algae and other plankton to multiply rapidly, and dissolved oxygen in water bodies The amount of water has declined, the water quality has deteriorated, and fish and other organisms have died in large numbers. Once the water body becomes eutrophic, even if the source of external nutrients is cut off, the water body will be difficult to self-purify and return to a normal state. The most important thing to deal with eutrophic water body is to remove the algae in the water body. [0003] The e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/54C02F1/52
CPCC02F1/5236C02F1/5245C02F1/54
Inventor 易皓胡勇有虢清伟王丽崔恺洪伟林健聪刘芸
Owner SOUTH CHINA UNIV OF TECH
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