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Sludge curing agent and preparation method thereof

A technology of sludge solidification agent and coagulation accelerator, which is applied in chemical instruments and methods, sludge treatment, fixed/solidified sludge treatment, etc. It can solve soil and groundwater pollution, sludge with poor mechanical properties and difficult to reuse To achieve the effect of promoting sludge dehydration, loosening sludge structure and increasing adsorption effect

Active Publication Date: 2019-08-09
深圳丁道筑恒设计咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sludge solidification material can solidify sludge and heavy metal elements, the mechanical properties of the solidified sludge are poor, and the weight of the soil is increased, and the solidification time is long. Difficult to redevelop and utilize
[0006] In summary, in the prior art, sludge fixatives still have poor fixation effect and low efficiency, and the mechanical properties of the fixed sludge are poor, making it difficult to reuse, and the heavy metal elements in the sludge will cause soil and groundwater damage. Pollution

Method used

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  • Sludge curing agent and preparation method thereof

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Effect test

Embodiment 1

[0029] Embodiment 1 A kind of sludge curing agent

[0030] The sludge curing agent is composed of the following components and parts by weight: 30 parts of attapulgite, 25 parts of modified straw, 18 parts of coagulant, 10 parts of bactericide, 5 parts of phenolic resin and carboxymethyl cellulose 0.5 parts of sodium; the bactericide is composed of calcium propionate and polyquaternium salt in a weight ratio of 1:9.

[0031] The preparation method of the modified straw is as follows: take 80 parts of corn stalks, dry them at 100°C, crush them to 100 mesh, add 40% citric acid aqueous solution which is 6 times the weight of the corn stalks, heat to 100°C, and stir After 80 minutes, add 20 parts of polyacrylamide and stir for 30 minutes, dry and crush through a 200-mesh sieve to obtain the product.

[0032] The coagulant is composed of the following components and parts by weight: 40 parts of cassava flour, 8 parts of acrylic acid, and 1 part of initiator; the initiator is ammon...

Embodiment 2

[0037] Embodiment 2 A kind of sludge curing agent

[0038] The sludge curing agent is composed of the following components and parts by weight: 40 parts of attapulgite, 35 parts of modified straw, 20 parts of coagulant, 12 parts of bactericide, 8 parts of phenolic resin and carboxymethyl cellulose 1.5 parts of sodium; the bactericide is composed of calcium propionate and polyquaternium salt in a weight ratio of 2:7.

[0039] The preparation method of the modified straw is as follows: take 80 parts of corn stalks, dry them at 100°C, crush them to 120 mesh, add 40% citric acid aqueous solution which is 7 times the weight of the corn stalks, heat to 110°C, stir After 80 minutes, add 20 parts of polyacrylamide and stir for 30 minutes, dry and crush through a 200-mesh sieve to obtain the product.

[0040] The coagulant is composed of the following components and parts by weight: 50 parts of cassava flour, 12 parts of acrylic acid, and 3 parts of initiator; the initiator is ammoniu...

Embodiment 3

[0045] Embodiment 3 a kind of sludge curing agent

[0046] The sludge curing agent is composed of the following components and parts by weight: 50 parts of attapulgite, 40 parts of modified straw, 28 parts of coagulant, 15 parts of bactericide, 10 parts of phenolic resin and carboxymethyl cellulose 2.0 parts of sodium; the bactericide is composed of calcium propionate and polyquaternium salt in a weight ratio of 3:4.

[0047] The preparation method of the modified stalks is as follows: take 80 parts of corn stalks, dry them at 100°C, crush them to 130 mesh, add 40% citric acid aqueous solution which is 8 times the weight of the corn stalks, heat to 120°C, stir After 80 minutes, add 20 parts of polyacrylamide and stir for 30 minutes, dry and crush through a 200-mesh sieve to obtain the product.

[0048] The coagulant includes the following components and parts by weight: 60 parts of cassava flour, 18 parts of acrylic acid, and 5 parts of initiator; the initiator is ammonium pe...

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Abstract

The invention belongs to the field of sludge treatment, and particularly relates to a sludge curing agent and a preparation method thereof. The sludge curing agent is prepared from, by weight, 30-50 parts of attapulgite, 25-40 parts of modified straw, 18-28 parts of a coagulant, 10-15 parts of a bactericide, 5-10 parts of phenolic resin and 0.5-2.0 parts of sodium carboxymethyl cellulose. The sludge curing agent can effectively improve the dewatering effect on purified sludge and reduce the content of heavy metal, the cost is low, the curing speed is high, the curing effect is good, the waterquality of a sludge filtrate can also be effectively improved, the environmental pollution is reduced, and the large-scale application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to a sludge solidifying agent and a preparation method thereof. Background technique [0002] With the large-scale production of modern industrialization and the improvement of the quality of life of residents, the global wastewater discharge is increasing year by year. In 2011 alone, the total amount of wastewater discharged in the country reached 65,919,220,000 tons. With the increase in the amount of sewage treatment, there will be an increase in sludge after treatment. The methods of sludge treatment generally include sludge concentration, conditioning, dehydration and sludge stabilization technology. In the past, most foreign cities used dehydration as the leading sludge treatment and disposal process. Due to the high initial moisture content of sludge, even after conventional dehydration, its moisture content is often above 80%, which is especially suitable for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/148C02F101/20
CPCC02F11/008C02F11/148C02F2101/20C02F2303/04
Inventor 罗磊鑫
Owner 深圳丁道筑恒设计咨询有限公司