KR20160122579A - Dehydration material of sludge and soil with high water containing rate - Google Patents
Dehydration material of sludge and soil with high water containing rate Download PDFInfo
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- KR20160122579A KR20160122579A KR1020150052693A KR20150052693A KR20160122579A KR 20160122579 A KR20160122579 A KR 20160122579A KR 1020150052693 A KR1020150052693 A KR 1020150052693A KR 20150052693 A KR20150052693 A KR 20150052693A KR 20160122579 A KR20160122579 A KR 20160122579A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
- C09K17/42—Inorganic compounds mixed with organic active ingredients, e.g. accelerators
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
The present invention relates to a high-function sludge and a dewatering material for efficiently dewatering soil, and more particularly, to a dewatering material for a high-function sludge and a soil, Sludge and soil quick dehydration treatment material capable of steadily solidifying the water content by abruptly reducing the water content.
In recent years, a large amount of high-function sludge is generated. For example, sewage sludge is an organic sludge composed of a body such as a microorganism that purifies domestic wastewater at a sewage end treatment plant. Even after dehydration treatment by a dehydrator, the water content is about 80 to 90% Which is a typical high-function material, has conventionally been treated by methods such as marine dumping and landfilling.
For example, domestic sewage sludge, which is currently discharging more than 8,000 t a day, has been banned from general landfill sites since July 2003, and marine dumping, which was the easiest to deal with, was banned in January 2012 .
At present, the sewage sludge is solidified in Daegu, Sejong, and Jeju including the landfill in the metropolitan area. So, we are operating a treatment plant to produce solidified soil that can be used as daily and intermediate cover materials. In this regard, However, it is urgently required to develop dehydrated materials having excellent performance in terms of ammonia gas generation, facility operation, and quality of solidified soil.
In order to solve these problems, Korean Patent Registration No. 10-0838627 discloses a method in which a primary mixing step of mixing an acidic incineration dust with an alkaline paper dust, a second mixing step of mixing sulfuric acid and ferrous sulfate heptahydrate, and a third mixing step A cooling step for removing heat of the coarse mixture, a fourth mixing step for mixing the quicklime to the powdered acidic powder via a pulverizing step and a pulverizing step for pulverizing the mixture through the cooling step . However, since the high-temperature heat is generated when the strong acidic powder is reacted with the alkaline powder due to the characteristics of sulfuric acid, a separate cooling device is required. In addition, there is a fear of explosion due to high temperature neutralizing heat in the closed powder mixer. And thus the generation of neutralizing heat is weak when dewatering the high-function sludge, thereby reducing the dehydration effect.
On the other hand, Korean Patent Registration No. 10-1091557 discloses a method comprising mixing a mixture of an alkaline dust waste and a sewage sludge to lower the water content of the sewage sludge, injecting an acidic solution through the injector into the mixture to stabilize the mixture by chemical reaction, However, in the case of concentrated sulfuric acid, there is a possibility that a large amount of hydrogen sulfide gas is generated when the mixture is directly contacted with a mixture containing a large amount of organic substance and strong alkaline powder. In the case of dilute sulfuric acid, And there is a large amount of water in the dilute sulfuric acid, so that the solidification of the solidified material is re-grown and the water content increases. Thus, there are many problems in actual use in the field.
SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and an object of the present invention is to provide a sludge- Sludge and soil quick dehydration treatment material which can stably be solidified.
In order to solve the above technical problems, the sludge and soil quick-dehydration treatment material according to the present invention comprises 50 to 50,000 parts by weight of a superabsorbent soft material, based on 100 parts by weight of the powdery superabsorbent polymer.
The powdery superabsorbent polymer may also be selected from the group consisting of poly (acrylic acid), starch crosslinked poly (acyl acid), hydrolyzed starch-acrylonitrile graft polymer, saponified vinyl acetate-acrylic acid ester polymer, starch- acrylic acid graft polymer, Or a mixture of two or more selected from the group consisting of rhenitrile polymer, sodium acrylate polymer, sodium methacrylate polymer, hydrolyzed acrylamide polymer, hydrolyzed acrylonitrile polymer, acrylic acid methacrylic acid copolymer and acrylic acid acrylamide copolymer .
It is preferable that the high-absorptive soft material is any one or a mixture of two or more selected from the group consisting of coal coal material, petro coke coal material, paper sludge material, sewage sludge material, and biomass material.
In addition, the rapid dehydration treatment material may further include a heat generating agent composed of any one of lime or lime dolomite or mixtures thereof in order to improve water dewatering performance by heat generation, and the heating agent may be added in an amount of 50 to 10,000 parts by weight per 100 parts by weight of the powdery superabsorbent polymer. By weight.
The rapid dehydration treatment material may further comprise an adsorbent composed of any one selected from the group consisting of sulfuric acid alumina, diatomaceous earth, zeolite, and bentonite to improve the water adsorption performance. The adsorbent may be added to the powdery superabsorbent polymer in an amount of 50 to 100 parts by weight, Preferably 10,000 parts by weight.
Further, in order to manifest the strength of the high-function sludge and the soil, the composition further comprises a strength-developing agent composed of one or more selected from the group consisting of ordinary Portland cement, blast furnace slag fine powder and blast furnace slag cement, And further preferably 50 to 20,000 parts by weight based on 100 parts by weight of the polymer.
According to the present invention, by using a powdery superabsorbent polymer and a soft material excellent in water absorption ability, the water content of the sludge and soil in a high-function state can be abruptly reduced and stably solidified.
In addition, since there is no need to further mix sulfuric acid and strongly acidic substances at the site of producing solidified soil, it is possible to solve corrosion problems and safety problems of workers in existing solidification facilities.
In addition, since the reaction heat is not excessively generated, the occurrence of odor during the dehydration process of the soil in a high-functioning state can be minimized, and the water can be dehydrated effectively.
Hereinafter, the sludge in high function state and the rapid dehydration treatment material for soil according to the present invention will be described in detail.
The high dehydration sludge and soil quick dehydration treatment material according to the present invention comprises 50 to 50,000 parts by weight of a superabsorbent soft material based on 100 parts by weight of the powdery superabsorbent polymer.
A powdery superabsorbent polymer is a resin particle that absorbs water several hundreds times its own weight and does not emit the liquid absorbed even when the absorbency is much higher than that of cotton or cotton without a similar role.
The powdery superabsorbent polymer may be selected from the group consisting of poly (acrylic acid), starch-crosslinked poly (acyl acid), hydrolyzed starch-acrylonitrile graft polymer, saponified vinyl acetate-acrylic acid ester polymer, starch-acrylic acid graft polymer, It is preferably one or a mixture of two or more selected from a nitrile polymer, a sodium acrylate polymer, a sodium methacrylate polymer, a hydrolyzed acrylamide polymer, a hydrolyzed acrylonitrile polymer, an acrylic acid methacrylic acid copolymer and an acrylic acid acrylamide copolymer .
It is preferable that the high-absorptive soft material is any one or a mixture of two or more selected from a coal coal material, a petro coke soft material, a paper sludge soft material, a sewage sludge soft material, and a biomass soft material.
It is preferable that the superabsorbent soft material is burned at a combustion temperature of 1,200 DEG C or lower to form a smooth glassy surface, so that the surface of the superabsorbent softened material is present in a coarse state. Also, CaO component capable of absorbing water is contained in an amount of 20% It can absorb moisture rapidly when it comes into contact with high moisture sludge and soil moisture.
The coal ash is generated from a thermal power and a cogeneration power plant having an in-furnace desulfurization system. Since coal and limestone are mixed and burned, a large amount of CaO is contained in the coal ash.
The petro coke ash is CaO and CaSO the sulfur component and the limestone contained in the petro coke in the process by the decarboxylation of CaO component to react at high temperatures to dual fuel limestone to the furnace desulfurization from the boiler to the petro cokes as fuel 4 form Lt; / RTI >
The paper sludge ash is used as a filler to reduce the amount of pulp used during the paper manufacturing process and to improve the quality of paper. In the process of incineration of excess limestone powder in sludge form in the boiler, limestone Resulting in combustion products having a high decalcified CaO content.
The biomass incineration ash is also mixed with limestone for boiler desulfurization in the boiler, so that the CaO content is high.
It is preferable that the superabsorbent soft material contains 50 to 50,000 parts by weight of a superabsorbent soft material based on 100 parts by weight of the superabsorbent polymer. When the amount of the superabsorbent polymer is less than 50 parts by weight, the content of the superabsorbent polymer increases, The content of the super-absorbent polymer is relatively decreased, and the water absorption capacity is rapidly deteriorated.
It is preferable that the rapid dehydration treatment material further comprises a heat generating agent composed of any one of lime or light dolomite or a mixture thereof in order to improve the water dewatering performance due to heat generation.
In addition, it is preferable that the exothermic agent further comprises 50 to 10,000% by weight based on 100 parts by weight of the powdery superabsorbent polymer. If the amount is less than 50 parts by weight, the exothermic effect is insufficient. If the amount exceeds 10,000 parts by weight, excessive heat may be generated to react with the sludge of high hydration state and organic matter of the soil, thereby generating odor such as ammonia.
The rapid dehydration treatment material may further include an adsorbent composed of any one selected from the group consisting of sulfuric acid alumina, diatomaceous earth, zeolite, and bentonite to improve water adsorption performance. The adsorbent preferably further comprises 50 to 10,000% by weight based on 100% by weight of the powdery superabsorbent polymer. When the amount is less than 50 parts by weight, the water adsorption effect is insufficient. When the amount exceeds 10,000 parts by weight, aggregation phenomenon occurs excessively, and mixing and transporting of the solidified soil may become difficult.
Further, it is preferable to further include a strength-developing agent comprising at least one selected from the group consisting of ordinary Portland cement, blast furnace slag fine powder and blast furnace slag cement for the purpose of manifesting the strength of the high-function sludge and the soil.
In addition, the strength agent preferably further comprises 50 to 20,000 parts by weight based on 100 parts by weight of the powdery superabsorbent polymer. If the amount is less than 50 parts by weight, the effect of improving the strength is insufficient. If the amount exceeds 10,000 parts by weight, the strength is excessively developed, and the hardened soil is hardened rapidly, which makes handling difficult and the vegetation of the hardened soil may not be possible in the future.
The high-function sludge and the soil may be selected from the group consisting of sewage sludge, purified sludge, process sludge, organic wastewater sludge, inorganic wastewater sludge, sludge sludge, food sludge, mud sludge, dredged soil, red mud, It is preferably one or a mixture of two or more.
Hereinafter, the performance and the performance of the high dehydration sludge and soil dehydration treatment material according to the present invention are compared and analyzed by using the embodiment and the comparative example.
Example One
First, 9.5 kg of papermaking sludge soft material was homogeneously mixed with 0.5 kg of a polyacrylic acid powder type superabsorbent polymer to prepare a dehydrated material.
Next, 20 kg of sewage sludge having a water content of 82.3% was mixed with 10 kg of the dehydrated material prepared as above, and cured to prepare a solidified soil.
Example 2
First, 6.5 kg of petroleum coke, 0.5 kg of burnt lime, and 2.5 kg of blast furnace slag powder were homogeneously mixed with 0.5 kg of a polyacrylic acid powder type superabsorbent polymer to prepare a dehydrated material.
Next, 20 kg of sewage sludge having a water content of 82.3% was mixed with 10 kg of the dehydrated material prepared as described above and cured to prepare a solidified soil.
Comparative Example One
First, 5 kg of papermaking sludge material, 3.5 kg of PET coke oven material, and 1.5 kg of burnt lime were homogeneously mixed to prepare a dehydrated material.
Next, 20 kg of sewage sludge having a water content of 82.3% was mixed with 10 kg of the dehydrated material prepared as described above and cured to prepare a solidified soil.
When the sludge and soil of the high-function state are dehydrated and solidified by using the dehydrated material produced by the present invention, it is required to have the required strength and the weather characteristics such as heavy rainfall, heavy snowfall It is necessary to prevent the re-slurrying phenomenon and the strength reduction phenomenon by flooding. Therefore, in this experiment, the unconfined compressive strength before and after flooding was investigated for the solidified soils cured for 7 days.
Table 1 shows the change in uniaxial compressive strength before and after immersion. On the 7th day of curing, 0.145 MPa in Example 1, 0.361 MPa in Example 2, and 0.137 MPa in Comparative Example were shown to exceed 0.1 MPa which is the strength standard of the cover material and the embankment. This shows the strength that can be used for various soil materials such as soft soil improvement material, car water material, back fill material. However, after flooding, the solidified soil of Example 1 showed -0.007 MPa, the solidified soil of Example 2 showed -0.01 MPa, and the solidified soil produced by Comparative Example showed a -0.046 MPa strength change ratio.
As can be seen from the above results, the uniaxial compressive strength change of the solidified soil before and after immersion in Examples 1 and 2 of the present invention showed a comparatively small reduction rate, whereas the comparative example without the superabsorbent polymer showed a high strength reduction rate, Which is lower than the strength standard of 0.1 MPa. This is because the superabsorbent polymer stabilizes the sludge particles physically by absorbing / fixing a large amount of water present in the sludge. Therefore, when the dehydrated material produced by the present invention is used in a sludge or soil of a high-function state to produce a solidified soil, sludge or soil of a high-function state can be handled and transported in a stable state, It is expected that it will not affect the operation of vehicles and equipments during rainstorming even if it is used as landfill / embankment of lowland farmland or construction of super levee.
Claims (6)
And 50 to 50,000 parts by weight of a superabsorbent soft material.
The powdery superabsorbent polymer may be selected from the group consisting of poly (acrylic acid), starch-crosslinked poly (acyl acid), hydrolyzed starch-acrylonitrile graft polymer, saponified vinyl acetate-acrylic acid ester polymer, starch-acrylic acid graft polymer, Or a mixture of two or more selected from the group consisting of a nitrile polymer, a sodium acrylate polymer, a sodium methacrylate polymer, a hydrolyzed acrylamide polymer, a hydrolyzed acrylonitrile polymer, an acrylic acid methacrylic acid copolymer and an acrylic acid acrylamide copolymer Characterized in that the sludge is a sludge,
Characterized in that the superabsorbent soft material is any one or a mixture of two or more selected from the group consisting of a coal soft material, a petro coke soft material, a paper sludge soft material, a sewage sludge soft material, and a biomass soft material. And rapid dehydration treatment for soil.
The rapid dehydration treatment material may further include a heat-generating agent composed of any one of lime or light dolomite or a mixture thereof to improve water dewatering performance by heat generation,
Wherein the heating agent further comprises 50 to 10,000 parts by weight based on 100 parts by weight of the powdery superabsorbent polymer.
The rapid dehydration treatment material may further include an adsorbent composed of any one selected from the group consisting of sulfuric acid alumina, diatomaceous earth, zeolite, and bentonite to improve water adsorption performance,
Wherein the adsorbent further comprises 50 to 10,000 parts by weight of the adsorbent per 100 parts by weight of the powdery superabsorbent polymer.
Further comprising a strength agent comprising at least one selected from the group consisting of ordinary Portland cement, blast furnace slag powder, and blast furnace slag cement for the purpose of expressing the strength of the high-function sludge and the soil,
Wherein the strength enhancer further comprises 50 to 20,000 parts by weight based on 100 parts by weight of the powdery superabsorbent polymer.
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| KR1020150052693A KR101795489B1 (en) | 2015-04-14 | 2015-04-14 | Dehydration material of sludge and soil with high water containing rate |
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| KR1020150052693A KR101795489B1 (en) | 2015-04-14 | 2015-04-14 | Dehydration material of sludge and soil with high water containing rate |
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Cited By (7)
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| KR101863673B1 (en) * | 2017-11-07 | 2018-06-01 | 한우선 | A high moisture soil solidification stabilizer and the progessing method thereof and the treatment method of high moisture soils |
| CN108996579A (en) * | 2018-08-08 | 2018-12-14 | 鞍钢股份有限公司 | A kind of reuse method of coking wastewater |
| KR102111881B1 (en) * | 2019-02-26 | 2020-05-15 | 임호 | Treatment agent for wet waste |
| KR20200098879A (en) * | 2019-02-13 | 2020-08-21 | (주)그린 엔바이론텍 | Manufacturing method of pulp mould product |
| CN112047676A (en) * | 2020-07-31 | 2020-12-08 | 河海大学 | Light solidified soil for resource utilization of river and lake bottom mud and preparation method and application thereof |
| FR3133607A1 (en) * | 2022-03-16 | 2023-09-22 | Aprotek | Drying composition to facilitate the handling of sludge |
| CN117603707A (en) * | 2024-01-22 | 2024-02-27 | 中建八局西南建设工程有限公司 | Solid waste-based soil curing agent and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001181074A (en) * | 1999-12-21 | 2001-07-03 | Sato Masako | Method for producing livestock dung fertilizer, the resultant livestock dung fertilizer and livestock dung treatment agent |
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2015
- 2015-04-14 KR KR1020150052693A patent/KR101795489B1/en active IP Right Grant
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101863673B1 (en) * | 2017-11-07 | 2018-06-01 | 한우선 | A high moisture soil solidification stabilizer and the progessing method thereof and the treatment method of high moisture soils |
| CN108996579A (en) * | 2018-08-08 | 2018-12-14 | 鞍钢股份有限公司 | A kind of reuse method of coking wastewater |
| CN108996579B (en) * | 2018-08-08 | 2021-07-20 | 鞍钢股份有限公司 | Method for recycling coking wastewater |
| KR20200098879A (en) * | 2019-02-13 | 2020-08-21 | (주)그린 엔바이론텍 | Manufacturing method of pulp mould product |
| KR102111881B1 (en) * | 2019-02-26 | 2020-05-15 | 임호 | Treatment agent for wet waste |
| CN112047676A (en) * | 2020-07-31 | 2020-12-08 | 河海大学 | Light solidified soil for resource utilization of river and lake bottom mud and preparation method and application thereof |
| FR3133607A1 (en) * | 2022-03-16 | 2023-09-22 | Aprotek | Drying composition to facilitate the handling of sludge |
| CN117603707A (en) * | 2024-01-22 | 2024-02-27 | 中建八局西南建设工程有限公司 | Solid waste-based soil curing agent and preparation method and application thereof |
| CN117603707B (en) * | 2024-01-22 | 2024-03-22 | 中建八局西南建设工程有限公司 | Solid waste-based soil curing agent and preparation method and application thereof |
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