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Composite flocculant for municipal sewage treatment and use method thereof

A composite flocculant and urban sewage technology, applied in the field of composite flocculants for urban sewage treatment, can solve the problems of poor biodegradability, removal of heavy metal ions, secondary pollution, etc., and achieve the effect of enhanced adsorption performance and good adsorption effect

Inactive Publication Date: 2020-10-23
中科乐美科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing flocculants are difficult to effectively remove heavy metal ions in industrial wastewater, have poor biodegradability, and easily cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A composite flocculant for urban sewage treatment, the composition of the composite flocculant includes the following raw materials in parts by weight: 12.5 parts of kaolin powder, 20 parts of hydroxyethyl cellulose, 5 parts of sodium hypochlorite, 12.5 parts of lignosulfonate, 1 part of ammonium sulfate, 15 parts of acrylamide, 10 parts of polyaluminum chloride, 1 part of ammonium thiosulfate, 32.5 parts of dilute hydrochloric acid, and 165 parts of deionized water.

[0025] The preparation method of the composite flocculant for urban sewage treatment comprises the following steps:

[0026] (1) Weigh the kaolin powder in proportion, add it to the roasting furnace, heat to 800° C., take it out, add the calcined kaolin powder into dilute hydrochloric acid, stir at a speed of 165 r / min for 30 min, and set aside;

[0027] (2) Weigh 1 / 4 of the total mass of hydroxyethyl cellulose, sodium hypochlorite and deionized water in proportion, add them into the reaction vessel toget...

Embodiment 2

[0032] A composite flocculant for urban sewage treatment, the composition of the composite flocculant includes the following raw materials in parts by weight: 10 parts of kaolin powder, 15 parts of hydroxyethyl cellulose, 3 parts of sodium hypochlorite, 10 parts of lignosulfonate, 0.5 parts of ammonium sulfate, 10 parts of acrylamide, 7 parts of polyaluminum chloride, 0.5 parts of sodium hydrosulfide, 30 parts of dilute hydrochloric acid, and 150 parts of deionized water.

[0033] The preparation method of the composite flocculant for urban sewage treatment comprises the following steps:

[0034] (1) Weigh the kaolin powder in proportion, add it to the roasting furnace, heat to 800°C, take it out, add the calcined kaolin powder into dilute hydrochloric acid, stir at a speed of 150r / min for 30min, and set aside;

[0035] (2) Weigh 1 / 4 of the total mass of hydroxyethyl cellulose, sodium hypochlorite and deionized water in proportion, add them into the reaction vessel together, s...

Embodiment 3

[0040] A composite flocculant for urban sewage treatment, the composition of the composite flocculant includes the following raw materials in parts by weight: 15 parts of kaolin powder, 25 parts of hydroxyethyl cellulose, 7 parts of sodium hypochlorite, 15 parts of lignosulfonate, 1.5 parts of ammonium sulfate, 20 parts of acrylamide, 13 parts of polyaluminum chloride, 1.5 parts of sodium hypophosphite, 35 parts of dilute hydrochloric acid, and 180 parts of deionized water.

[0041] The preparation method of the composite flocculant for urban sewage treatment comprises the following steps:

[0042](1) Weigh the kaolin powder in proportion, add it to the roasting furnace, heat to 800°C, take it out, add the calcined kaolin powder into dilute hydrochloric acid, stir at a speed of 180r / min for 30min, and set aside;

[0043] (2) Weigh 1 / 4 of the total mass of hydroxyethyl cellulose, sodium hypochlorite and deionized water in proportion, add them into the reaction vessel together, ...

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PUM

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Abstract

The invention provides a composite flocculant for municipal sewage treatment and a use method thereof. The composite flocculant is prepared from the following raw materials in parts by weight: 10-15 parts of kaolin powder, 15-25 parts of hydroxyethyl cellulose, 3-7 parts of sodium hypochlorite, 10-15 parts of lignosulfonate, 0.5-1.5 parts of a catalyst, 10-20 parts of acrylamide, 7-13 parts of polyaluminum chloride, 0.5-1.5 parts of a stabilizer, 30-35 parts of diluted hydrochloric acid and 150-180 parts of deionized water. The composite flocculant for municipal sewage treatment has a good adsorption effect on heavy metal ions in industrial wastewater, is good in biodegradability and does not easily cause secondary pollution.

Description

technical field [0001] The invention relates to the technical field of flocculants, in particular to a composite flocculant for urban sewage treatment and a use method thereof. Background technique [0002] Flocculant, also known as settling agent, is a kind of substance that can coagulate and settle solid suspended particles that are not easy to settle in liquid. It is widely used in post-treatment of fermentation industry, food processing, civil dredging construction, wastewater treatment and other fields. Flocculants can be divided into three categories: inorganic system, biological system and synthetic polymer system. Synthetic polymer flocculants, such as tannin, are widely used due to their high flocculation activity and low cost, but their residues are not easy to be Biodegradable, and its monomer has strong neurotoxicity and three effects (teratogenic, mutagenic, carcinogenic), causing secondary pollution and greatly restricting its application. It has been banned i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F101/20
CPCC02F1/5236C02F1/56C02F2101/20
Inventor 梁俊杰曹宇翔高丽耿南桥唐公明
Owner 中科乐美科技集团有限公司
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