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A method of strengthening the flocculation ability of ester flocculant by prehydrolysis

A flocculant and pre-hydrolysis technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of long treatment process, large amount of flocculant, low economic benefits, etc., and achieves a high degree of environmental harmlessness. The effect of secondary pollution and simple process

Active Publication Date: 2022-04-19
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of strong pertinence and remarkable treatment effect, but its treatment process is long, requires two flocculation and adsorption, the operation is more complicated, the amount of flocculant is large, and the economic benefit is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The flocculation ability of ester flocculants is enhanced by pre-hydrolysis in the following ways:

[0024] 1) Flocculant pre-hydrolysis: Take 0.2g of ester flocculant AM-g-MPC into distilled water to make a mixed solution with a concentration of 0.2%, add phosphotungstic acid to catalyze hydrolysis, AM-g-MPC and phosphotungstic acid The mass ratio of is 2:1, and the mixture is stirred and hydrolyzed in a constant temperature water bath at 40°C for 6h.

[0025] 2) Flocculation: The hydrolyzed AM-g-MPC is used for flocculation treatment of kaolin wastewater with a turbidity of about 60NTU, and the dosage of flocculant is 20mg / L.

[0026] 3) Stand still: The treated kaolin wastewater is left to stand for 20 minutes to achieve solid-liquid separation, which can effectively remove kaolin suspended particles in the water body.

Embodiment 2

[0028] The flocculation ability of ester flocculants is enhanced by pre-hydrolysis in the following ways:

[0029] 1) Flocculant pre-hydrolysis: Take 0.4g of ester flocculant AM-g-MPC into distilled water to make a mixed solution with a concentration of 0.4%, add phosphotungstic acid to catalyze hydrolysis, AM-g-MPC and phosphotungstic acid The mass ratio of is 2:1, and the mixture is stirred and hydrolyzed in a constant temperature water bath at 60°C for 7h.

[0030] 2) Flocculation: The hydrolyzed AM-g-MPC is used for flocculation treatment of kaolin wastewater with a turbidity of about 60NTU, and the dosage of flocculant is 20mg / L.

[0031] 3) Stand still: The treated kaolin wastewater is left to stand for 20 minutes to achieve solid-liquid separation, which can effectively remove kaolin suspended particles in the water body.

Embodiment 3

[0033] The flocculation ability of ester flocculants is enhanced by pre-hydrolysis in the following ways:

[0034] 1) Flocculant pre-hydrolysis: Take 0.6g of ester flocculant AM-g-MPC into distilled water to make a mixed solution with a concentration of 0.6%, add phosphotungstic acid to catalyze hydrolysis, AM-g-MPC and phosphotungstic acid The mass ratio of is 2:1, and the mixture is stirred and hydrolyzed in a constant temperature water bath at 50°C for 8h.

[0035] 2) Flocculation: The hydrolyzed AM-g-MPC is used for flocculation treatment of kaolin wastewater with a turbidity of about 60NTU, and the dosage of flocculant is 30mg / L.

[0036] 3) Stand still: The treated kaolin wastewater is left to stand for 30 minutes to achieve solid-liquid separation, which can effectively remove kaolin suspended particles in the water body.

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Abstract

The invention discloses a method for strengthening the flocculation ability of an ester flocculant through pre-hydrolysis, which specifically includes the following steps: (1) Pre-hydrolysis of the flocculant: taking an appropriate amount of the ester flocculant AM-g-MPC into distilled water, adding a certain A large amount of phosphotungstic acid is used to catalyze hydrolysis, and the mixture is stirred and hydrolyzed in a constant temperature water bath at 40~70°C; (2) Flocculation: the hydrolyzed AM‑g‑MPC is used for flocculation treatment of kaolin wastewater with a turbidity of about 60NTU; (3) Stand still: The treated kaolin wastewater is allowed to stand for a certain period of time to achieve solid-liquid separation, which can effectively remove suspended particles of kaolin in the water body. The method has a treatment efficiency of more than 92% for kaolin wastewater. Under the same conditions, the removal rate of AM-g-MPC after hydrolysis is improved compared with that without hydrolysis. The materials used are easy to prepare, the treatment efficiency of kaolin wastewater is high, and the treatment cost is low. , which has good economic benefits and application potential.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for strengthening the flocculation ability of an ester flocculant through prehydrolysis. Background technique [0002] Water resources are an important resource for the normal operation of natural ecosystems and human survival. However, with the development of the world economy, the population continues to grow, cities are increasing and expanding, and water consumption in various places is increasing. At the same time, with the development of industrial production and life , water pollution is also becoming more and more serious, and water pollution will cause great harm to the ecological environment and biological health. Wastewater often needs to be strictly treated before it can enter the circulating water body for daily use. Improving the quality of the water environment and protecting the safety of the water environment are the focus of at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
CPCC02F1/56
Inventor 黄廷唐晓旻
Owner CHONGQING TECH & BUSINESS UNIV