A kind of preparation method of environment-friendly algae-removing coagulant

An environmentally friendly, coagulant technology, applied in the field of environmental governance, can solve the problems of consuming dissolved oxygen, easily clogged membrane pores, and increased treatment costs of water plants, achieving low water pollution and good results

Active Publication Date: 2022-04-22
CHANGZHOU INST OF LIGHT IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultrafiltration membrane method has a good removal effect on algae cells and extracellular polymers in water, but algae and algae-derived organic matter can easily block the membrane pores, causing serious membrane fouling
The air flotation method is only suitable for water treatment with high algae and low turbidity. At the same time, the water plant must build new structures and newly added water pumps to increase energy consumption and increase the treatment cost of the water plant.
Biological treatment uses bacteria that can dissolve algae to destroy the algal cell wall, but after the algae ruptures and dies, the organic matter in the cells will be released, consuming dissolved oxygen in the water body, increasing the concentration of total organic carbon in the water body, and destroying the ecological balance of aquatic organisms

Method used

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  • A kind of preparation method of environment-friendly algae-removing coagulant

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Experimental program
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Effect test

Embodiment 1

[0022] An environment-friendly algae-removing coagulant, the preparation method of which is:

[0023] (1) Aluminum chloride hexahydrate powder, ferric chloride hexahydrate powder, and cerium trichloride hexahydrate powder are respectively ground and passed through a 500-mesh sieve, and aluminum chloride hexahydrate and chlorine hexahydrate after sieving are weighed. Ferric chloride, cerium trichloride hexahydrate powder, three kinds of sieved powders are mixed evenly in the ratio of aluminum chloride hexahydrate by mass: ferric chloride hexahydrate: cerium trichloride hexahydrate=1:1:0.3 Finally, heat to 250°C for a roasting, the roasting time is 20min, after the roasting is completed, air cool to normal temperature, and then add iridium trichloride powder to the powder, the blending quality of the iridium trichloride powder is chlorinated hexahydrate in the powder 1 / 18 times the mass of aluminum, stir the powder evenly, heat again to 180°C for secondary roasting, the roasting...

Embodiment 2

[0027] An environment-friendly algae-removing coagulant, the preparation method of which is:

[0028] (1) Aluminum chloride hexahydrate powder, ferric chloride hexahydrate powder, and cerium trichloride hexahydrate powder were ground respectively and passed through a 500-mesh sieve, and the sieved aluminum chloride hexahydrate and hexahydrate Ferric chloride, cerium trichloride hexahydrate powder, three kinds of sieved powders are mixed by mass ratio aluminum chloride hexahydrate: ferric chloride hexahydrate: cerium trichloride hexahydrate=1:1:0.4 After uniformity, heat to 270 ° C for a roasting time of 18 minutes. After the roasting is completed, air cool to room temperature, and then add iridium trichloride powder to the powder. 1 / 18 times the mass of aluminum chloride, stir the powder evenly, heat again to 190°C for a second roasting, the roasting time is 30min; after the roasting is completed, air cool to room temperature;

[0029] (2) Pour the powder processed in the ste...

Embodiment 3

[0032] An environment-friendly algae-removing coagulant, the preparation method of which is:

[0033] (1) Aluminum chloride hexahydrate powder, ferric chloride hexahydrate powder, and cerium trichloride hexahydrate powder were ground respectively and passed through a 500-mesh sieve, and the sieved aluminum chloride hexahydrate and hexahydrate Ferric chloride, cerium trichloride hexahydrate powder, three kinds of sieved powders are mixed in the ratio of aluminum chloride hexahydrate by mass: ferric chloride hexahydrate: cerium trichloride hexahydrate=1:2:0.5 After uniformity, heat to 290 ° C for a roasting time of 15 minutes. After the roasting is completed, air cool to room temperature, and then add iridium trichloride powder to the powder. 1 / 18 times the mass of aluminum chloride, stir the powder evenly, heat again to 190°C for secondary roasting, the roasting time is 30min; air cool to room temperature after the roasting is completed;

[0034] (2) Pour the powder processed ...

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Abstract

The invention discloses a preparation method of an environment-friendly algae-removing coagulant. The preparation method is as follows: (1) taking aluminum chloride hexahydrate, ferric chloride hexahydrate and cerium trichloride hexahydrate respectively after sieving Powder, mixed evenly, heated for one roasting, air cooling, mixed with iridium trichloride, second roasting, air cooling; (2) Add deionized water to the roasted powder to react until dark brown polymer is formed and air cool to room temperature Stop stirring to obtain the crude coagulant; (3) Configure an aqueous solution of sodium hydroxide, soak the crude coagulant in the aqueous solution of sodium hydroxide, stir rapidly, then add iron oxide powder and hydrogen peroxide sequentially therein, and the feeding is completed Then continue to stir, stand at room temperature for more than 20h, and freeze-dry to obtain the coagulant. The algae-removing coagulant prepared by the invention has good algae-removal effect, less water pollution, and is suitable for primary treatment of water body pollutants.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, in particular to an environmentally friendly algae-removing coagulant and a preparation method thereof. Background technique [0002] Algae-rich water will bring difficulties to the water quality treatment of waterworks. During the metabolism of algae cells, organic matter will be released into the water body, including odor and smell substances, and disinfection by-products will be produced during the disinfection process. At present, there are three commonly used algae removal methods: biological removal, chemical removal and physical removal. Physical methods include ultrafiltration membrane method, air flotation method and activated carbon adsorption method. The ultrafiltration membrane method has a good removal effect on algae cells and extracellular polymers in water, but algae and algae-derived organic matter can easily block the membrane pores, causing serious membrane fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01P13/00C02F1/52
CPCA01N59/16C02F1/5236C02F2103/007
Inventor 陈怀民徐点点
Owner CHANGZHOU INST OF LIGHT IND TECH
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