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Enhanced coagulation removal method for algae in water body for eliminating inhibition of algae-derived organic matters

An organic matter and algae technology is applied in the field of enhanced coagulation and removal of algae in water bodies inhibited by algae-derived organic matter, and achieves the effects of low cost, increased selective action probability, and reduced dosage

Pending Publication Date: 2022-06-28
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of algae enhanced coagulation removal method in the water body that eliminates the inhibition of algae source organic matter, to solve the problem of the prior art shortcoming in the above-mentioned background technology

Method used

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  • Enhanced coagulation removal method for algae in water body for eliminating inhibition of algae-derived organic matters
  • Enhanced coagulation removal method for algae in water body for eliminating inhibition of algae-derived organic matters
  • Enhanced coagulation removal method for algae in water body for eliminating inhibition of algae-derived organic matters

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Passivation of active functional groups of algae-derived organic matter: Add sulfuric acid with a concentration of 0.5 mol / L to the raw water containing algae to passivate the active functional groups of algae-derived organic matter in the raw water, and the passivation time is 30 seconds. The active functional groups that inhibit coagulation on the algae-derived organic matter are inactive.

[0030] (2) Selective adsorption of coagulant: After the passivation is completed, within 30 seconds, add 4 mg / L PAC as a coagulant, and immediately stir at 200 rpm for 30 seconds to make the coagulant fully contact with the algal cells. adsorption.

[0031] (3) Enhanced coagulation: After the coagulant is selectively adsorbed on the algal cells, the pH of the raw water is adjusted to 6.5 by adding 0.5mol / L sodium hydroxide solution, and the shape of the coagulant is changed to make it easier Coagulation with algal cells was performed, and then the algal cells were coagulated ...

Embodiment 2

[0035] (1) Passivation of active functional groups of algae-derived organic matter: Add hydrochloric acid with a concentration of 0.1 mol / L to the raw water containing algae to passivate the active functional groups of algae-derived organic matter in the raw water. The passivation time is 60 seconds, so that the The active functional groups that inhibit coagulation on the algae-derived organic matter are inactive.

[0036] (2) Selective adsorption of coagulant: After passivation, within 60 seconds, add 5 mg / L aluminum sulfate as coagulant, and immediately stir at 300 rpm for 30 seconds to make the coagulant fully contact with algal cells and adsorbed.

[0037] (3) Enhanced coagulation: After the coagulant is selectively adsorbed on the algal cells, the pH of the raw water is adjusted to 7 by adding 0.1mol / L sodium hydroxide solution, and the form of the coagulant is changed to make it easier Perform coagulation with algal cells, and then slowly stir at 50 rpm for 5 minutes to...

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Abstract

The invention discloses a method for removing algae in water by enhanced coagulation for eliminating inhibition of algae-derived organic matters, which comprises the following four steps: passivating active functional groups of the algae-derived organic matters, selectively adsorbing a coagulant, performing enhanced coagulation and removing algae cells. The active functional group passivation of the algae-derived organic matters is to add a proper amount of functional group active passivation solution with a certain concentration into the algae-containing raw water, and the active functional groups of the algae-derived organic matters in the water body are passivated through rapid stirring; according to the selective adsorption of the coagulant, after active functional groups of the algae-derived organic matter in raw water are passivated, the coagulant is added, and the coagulant and algae cells are selectively adsorbed through rapid stirring, so that the inhibition effect of the algae-derived organic matter on coagulation can be eliminated, the dosage of the coagulant is remarkably reduced, and the utilization rate of the coagulant is increased; the secondary pollution of the coagulant to the water body is reduced, the coagulation of algae cells can be enhanced, the removal efficiency of algae in the water body is improved, the process flow is simple, and the popularization and application are easy to realize.

Description

technical field [0001] The invention relates to the technical field of water purification of natural water bodies, in particular to a method for enhanced coagulation and removal of algae in water bodies which eliminates the inhibition of algae-derived organic matter. Background technique [0002] With the increasingly serious eutrophication of water bodies, many natural water bodies such as reservoirs, lakes, and rivers at home and abroad are facing the threat of seasonal outbreaks of cyanobacterial blooms, causing damage to the water ecological environment and threatening the safety of drinking water for the general public. After the outbreak of cyanobacterial blooms, due to factors such as wind, waves and weather, the rapid accumulation of algal cells will accelerate the corruption of algal cells, resulting in excessive algal toxins and odorous substances in the water body, which seriously threatens aquatic organisms and the safety of human and animal life. Therefore, effi...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/00C02F1/66C02F1/5236C02F1/56C02F2303/20C02F2301/08
Inventor 张海阳张学治程绍哲李静
Owner INST OF AQUATIC LIFE ACAD SINICA
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