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Composite flocculant for sludge treatment and preparation method thereof

A composite flocculant and sludge treatment technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc. problems such as high density, to achieve the effect of reducing volume, good physical adsorption capacity, and increasing sedimentation speed

Inactive Publication Date: 2019-04-12
ANHUI UNIVERSITY OF ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used flocculants include natural flocculants and polymeric flocculants. Whether it is a natural flocculant or a polymeric flocculant, the flocculation time is longer, the turbidity is higher, and the moisture content of the sludge after flocculation is higher.

Method used

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  • Composite flocculant for sludge treatment and preparation method thereof
  • Composite flocculant for sludge treatment and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A composite flocculant for sludge treatment, comprising the following composition in parts by weight, 5 parts of ethylenediaminetetraacetic acid, 5 parts of polyferric sulfate, 1 part of caffeic acid, 5 parts of polyaluminum ferric chloride, carboxymethyl 10 parts of sodium cellulose, 5 parts of bentonite and 1 part of sodium carbonate.

[0020] A preparation method for a composite flocculant for sludge treatment,

[0021] Add 0.5g of ethylenediaminetetraacetic acid, 0.5g of polyferric sulfate, 0.1g of caffeic acid, 0.5g of polyaluminum ferric chloride, 1g of sodium carboxymethyl cellulose, and 0.5g of bentonite into 100mL of water in sequence, at 20°C, 100r / Stir for 20 min under the condition of 1 min, add 0.1 g of sodium carbonate, continue stirring for 5 min, vacuum filter, and dry the filter cake at 100°C to obtain the composite flocculant.

Embodiment 2

[0023] A composite flocculant for sludge treatment, comprising the following composition in parts by weight, 1 part of ethylenediaminetetraacetic acid, 1 part of polyferric sulfate, 5 parts of caffeic acid, 1 part of polyaluminum ferric chloride, carboxymethyl 20 parts of sodium cellulose, 7 parts of bentonite and 5 parts of sodium carbonate.

[0024] A preparation method for a composite flocculant for sludge treatment,

[0025] Add 0.1g of ethylenediaminetetraacetic acid, 0.1g of polyferric sulfate, 0.5g of caffeic acid, 0.1g of polyaluminum ferric chloride, 2g of sodium carboxymethyl cellulose, and 0.7g of bentonite into 100mL of water in turn, at 20°C, 100r / Stir for 20 min under the condition of 1 min, add 0.5 g of sodium carbonate, continue stirring for 5 min, vacuum filter, and dry the filter cake at 100°C to obtain the composite flocculant.

Embodiment 3

[0027] A composite flocculant for sludge treatment, comprising the following composition in parts by weight, 5 parts of ethylenediaminetetraacetic acid, 5 parts of polyferric sulfate, 5 parts of caffeic acid, 5 parts of polyaluminum ferric chloride, carboxymethyl 20 parts of sodium cellulose, 5 parts of bentonite and 3 parts of sodium carbonate.

[0028] A preparation method for a composite flocculant for sludge treatment,

[0029] Add 0.5g of ethylenediaminetetraacetic acid, 0.5g of polyferric sulfate, 0.5g of caffeic acid, 0.5g of polyaluminum ferric chloride, 2g of sodium carboxymethyl cellulose, and 0.5g of bentonite into 100mL of water in sequence, at 30°C, 100r / Stir for 40 min under the condition of 1 min, add 0.3 g of sodium carbonate, continue stirring for 5 min, vacuum filter, and dry the filter cake at 110°C to obtain the composite flocculant.

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Abstract

The invention belongs to the technical field of flocculants, and particularly relates to a composite flocculant for sludge treatment. The composite flocculant consists of the following components in parts by weight: 1-25 parts of ethylenediamine tetraacetic acid, 1-20 parts of polymeric ferric sulfate, 1-10 parts of caffeic acid, 1-20 parts of polymeric ferric chloride, 10-30 parts of sodium carboxymethylcellulose, 5-15 parts of bentonite and 1-5 parts of sodium carbonate. The composite flocculant has the beneficial effects: 1, when the composite flocculant prepared provided by the invention is used for sewage treatment, the water content of sludge subjected to flocculation is low to 69.1%, the volume of sewage is greatly reduced, and processing cost of subsequent processes is reduced; and2. after flocculation by using the composite flocculant provided by the invention is completed, the composite flocculant can be recycled through simple drying and grinding treatment.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and in particular relates to a composite flocculant for sludge treatment and a preparation method thereof. Background technique [0002] With the acceleration of urbanization and industrialization, the rapid acceleration of urbanization has led to a gradual increase in urban water consumption, followed by a great increase in the amount of domestic sewage pollution treatment, and the amount of sludge has also increased. The common method before mud dewatering is flocculation and sedimentation. [0003] The currently used flocculants include natural flocculants and polymeric flocculants. Regardless of whether it is a natural flocculant or a polymeric flocculant, the flocculation time is longer, the turbidity is higher, and the moisture content of the sludge after flocculation is higher. Contents of the invention [0004] In order to solve the above problems, the purpose of the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/148
CPCC02F11/14
Inventor 张华黄显怀黄健张勇刘俊闫珍刘渐和
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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