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Process for preparing flocculation agent cactus

A technology of cactus and flocculant, which is applied in the preparation of cactus flocculant. Cactus flocculant is especially suitable for the application field in water treatment. It can solve the problem of poor treatment effect of domestic sewage and printing and dyeing wastewater, limited range of applicable water bodies, and unusable water supply. The overall clarification time is short, the treatment is convenient and complete, and the treatment effect is good.

Inactive Publication Date: 2006-01-25
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing inorganic flocculants have the disadvantages of limited application range of water bodies, large amount of use, large amount of flocs, slow sedimentation speed, difficult sludge dehydration and high cost of final sludge treatment. accumulation can lead to dementia
Polyacrylamide is mostly used in organic polymer flocculants, and its disadvantages are mainly the low molecular weight of the product, complex production process, and the residual toxic acrylamide monomer in the treated water, which cannot be used for water supply treatment
In addition, polyacrylamide has poor treatment effect on domestic sewage and printing and dyeing wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The cactus is cleaned, cut into thin slices with a thickness of about 0.5 cm, dried at 80° C. for 8 to 10 hours, and the obtained dried solid is pulverized with a pulverizer, and then the gained solid powder is passed through a 30-mesh sieve and a 40-mesh sieve. Mesh sieve to select dried cactus powder with a particle size of 0.45mm-0.60mm, and use the concentration of 45mg / L to coagulate the kaolin suspension with a turbidity of 80NTU, and stir at 125r / min for 2min. Stir at 70r / min for 20min, then let stand for 20min, measure the turbidity of the supernatant, and the removal rate is 91.8%.

Embodiment 2

[0023] Embodiment 2: The cactus is cleaned, cut into thin slices with a thickness of about 0.5 cm, dried at 80° C. for 8 to 10 hours, and the obtained dried solid is pulverized by a pulverizer, and then the obtained solid powder is passed through a 20-mesh sieve and a 30-mesh sieve. Mesh sieve to select dry cactus powder with a particle size of 0.60mm-0.90mm, and use it to coagulate the kaolin suspension with a turbidity of 80NTU according to the concentration of 50mg / L, and stir it at 125r / min for 2min. Stir at 70r / min for 20min, then let stand for 20min, measure the turbidity of the supernatant, and the removal rate is 92.2%.

Embodiment 3

[0024] Embodiment 3: The cactus is cleaned, cut into thin slices with a thickness of about 0.5 cm, dried at 80° C. for 8 to 10 hours, and the obtained dried solid is pulverized by a pulverizer, and then the obtained solid powder is passed through a 16-mesh sieve and a 20-mesh sieve. Mesh sieve to select dry cactus powder with a particle size of 0.90mm-1.25mm, and use it to coagulate the kaolin suspension with a turbidity of 80NTU at a concentration of 60mg / L, and stir at 125r / min for 2min. Stir at 70r / min for 20min, then let stand for 20min, measure the turbidity of the supernatant, and the removal rate is 91.5%.

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PUM

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Abstract

A cactus flocculant is prepared from cactus through washing, slicing, baking, pulverizing and sieving. Its advantages are high flocculating speed and performance and low cost.

Description

technical field [0001] The invention relates to the technical field of water treatment flocculation, and more specifically relates to a preparation method of a cactus flocculant, which is especially suitable for application in water treatment. Background technique [0002] The flocculation process of water treatment is to add flocculants to the water body, so that the colloidal substances, suspended solids and partially dissolved substances in the water body will form aggregates with a certain particle size through physical and chemical actions under the action of the flocculant, and through further collision, chemical adhesion Alum flowers are formed by knotting, netting, sweeping, co-precipitation, etc., and finally solid-liquid separation is carried out by gravity. Thus, the turbidity, chromaticity and COD (chemical oxygen demand) of the water body are removed, and the water quality of the water body is improved. [0003] At present, the floccul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 张敬东叶春松罗玉红张芳
Owner WUHAN UNIV
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