CN100522854C - Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant - Google Patents
Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant Download PDFInfo
- Publication number
- CN100522854C CN100522854C CNB2007101338759A CN200710133875A CN100522854C CN 100522854 C CN100522854 C CN 100522854C CN B2007101338759 A CNB2007101338759 A CN B2007101338759A CN 200710133875 A CN200710133875 A CN 200710133875A CN 100522854 C CN100522854 C CN 100522854C
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- gypsum
- lime
- curing
- cement
- mud
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to curing agent used for curing and stabilizing dewatered sludge produced by a sewage plant. The invention is characterized in that curing material and assistant curing material bentonite are added by weight in the dewatered sludge, and each component is mixed evenly, and the weight percentage of each component is 30 to 80 percent of sludge, 15 to 30 percent of curing material, and 5 to 40 percent of bentonite. The curing material is formed by concrete, lime, fly ash and gypsum by weight. The invention has the advantages that the disposed sludge can be disposed by burying to be as fillings for the using of renewable recources. The curing agent can improve the high water content and the low intensity of the sewage, and has the advantages of increasing curing effect, reducing curing material use amount and reducing disposal cost. The compositions of the curing agent of concrete, fly ash, lime, gypsum and bentonite have wide distribution and low price with finished produces selling, thereby realizing the industrialization of sludge curing and stabilizing techniques.
Description
Technical field
What the present invention relates to is that a kind of dewatered sludge that Sewage Plant is produced is cured/method of stabilization treatment.By this solidifying agent be cured/mud after the stabilization treatment can satisfy the requirement that landfill is disposed, and also can be used as general soil material and uses, and belongs to the resource environment field.
Background technology
The disposal of mud at present is mainly agricultural to transfer to, burning disposal and landfill yard landfill.It is agricultural that heavy metals exceeding standard in the mud has limited mud.Burning disposal investment and working cost are bigger.Mud is sent to sanitary filling field carries out the landfill disposal, because water ratio height, the mechanical property of mud are poor, undressed mud directly enters the engineering project disaster that landfill yard tends to cause landfill yards such as landslide.Mud is because the water ratio height, the organic content height, the inorganic solid particles composition is few, and it mainly is the hydrated product that relies on hydrated reaction of cement to form that curing/stabilizing is handled the formed intensity in back, so just need to consume a large amount of cement and could obtain certain intensity, so its processing costs is higher.
Summary of the invention
The objective of the invention is a large amount of mud of producing in the sewage disposal for solving, it is cured/method of stabilization treatment, the mud after the processing can satisfy that landfill is disposed or the requirement of recycling.
Technical scheme of the present invention: it is characterized in that adding by weight proportion in dewatered sludge the auxiliary solidify material wilkinite of solidify material, with each component mixing and stirring, the shared weight percent of each component is:
Mud 30~80%,
Solidify material 15~30%,
Wilkinite 5~40%;
Above-mentioned solidify material is made up of cement, lime, flyash and gypsum, and each moiety mass ratio is a cement: lime: flyash: gypsum=(13-18): (1-4): (1-3): (1-3).
Advantage of the present invention and effect are: in dewatered sludge, add a certain proportion of solidify material, and
Add a certain proportion of wilkinite as auxiliary solidify material, the hydrate that the solidify material hydration reaction produces and the cementation of wilkinite mineral form skeleton in mud, improve the intensity of solidification sludge, utilize the stable and sealing process of hydrate simultaneously, reduce the harm of mud environment to pollutent.And it specifically also has following characteristics: (1) processing cost significantly reduces: owing to increased the skeleton composition in the mud by adding wilkinite, can significantly reduce the solidify material consumption, thereby reduce the cost of handling; (2) composition cement, lime, flyash, gypsum, the wilkinite of solidifying agent are a kind of mineral wealth of extensive distribution, also have finished product to sell, and are convenient to realize the industrialization of sludge curing technology; (3) the outlet diversification after the sludge treatment: present method can be according to actual needs, makes that by optimizing the material addition both can carry out landfill after the sludge treatment disposes, and also can carry out recycling, as cap rock or the embankment material as landfill yard;
Embodiment
Embodiment 1:
Each component of the present invention mixes by following weight percent and forms:
Mud 65%
Solidify material 15%
Wilkinite 20%
Above-mentioned solidify material is by cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=14: 3: 2: 1.
According to this proportioning, in mud per ton, add the solidify material of 142.9kg, the wilkinite mixing and stirring of 285.7kg, 7 days unconfined compression strengths of the mud after the processing can reach 50kPa, and coefficient of permeability is less than 10
-7Cm/s can satisfy and carry out that landfill is disposed or as the needs of landfill yard earthing.Directly adopt the method for handling than not adding wilkinite, reach identical effect and can save nearly 4 times expense.
Embodiment 2:
Each component of the present invention mixes by following weight percent and forms:
Mud 60%
Solidify material 20%
Wilkinite 20%.
Above-mentioned solidify material is by cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=16: 2: 1: 1.
Utilize this proportioning, in mud per ton, add the 333.3kg solidify material, the wilkinite mixing and stirring of 333.3kg, 7 days unconfined compression strengths of the mud after the processing can reach 100kPa.Can satisfy the requirement of banketing,, reach identical effect and can save nearly 5 times expense than not adding the method that wilkinite is directly handled as common engineering.
Embodiment 3:
Each component of the present invention mixes by following weight percent and forms:
Mud 30%
Solidify material 30%
Wilkinite 40%
Above-mentioned solidify material is by cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=13: 4: 3: 3.
According to this proportioning, get mud 300kg, solidify material 300kg, with wilkinite 400Kg mixing and stirring, 7 days unconfined compression strengths of mud after the processing can reach 50kPa, and coefficient of permeability is less than 10-7cm/s, can satisfy to carry out that landfill is disposed or as the needs of landfill yard earthing.Directly adopt the method for handling than not adding wilkinite, reach identical effect and can save nearly 4 times expense.
Embodiment 4:
Each component of the present invention mixes by following weight percent and forms:
Mud 80%
Solidify material 15%
Wilkinite 5%
Above-mentioned solidify material is by cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=18: 1: 1: 3.
Utilize this proportioning, get mud 800kg, solidify material, 15kg and wilkinite 5kg mixing and stirring, 7 days unconfined compression strengths of the mud after the processing can reach 100kPa.Can satisfy the requirement of banketing,, reach identical effect and can save nearly 5 times expense than not adding the method that wilkinite is directly handled as common engineering.
To mud be cured/to put forward high-intensity mechanism mainly be that hydrated reaction of cement generates to stabilization processes Hydrated calcium silicate solid waste particle is produced cementation. The present invention is a kind of by adding in mud Sludge solidifying agent realizes reducing the curing materials consumption, reduces the target of processing cost. And adopt Curing agent has wide material sources, cheap, characteristics with shaped article, is convenient to realize sludge curing The industrialization of/stabilization processes technology.
Claims (5)
1, the dewatered sludge that produces of Sewage Plant is cured/method of stabilization treatment, it is characterized in that adding by weight proportion in dewatered sludge solidify material and auxiliary solidify material wilkinite, and with each component mixing and stirring, the shared weight percent of each component is:
Mud 30~80%,
Solidify material 15~30%,
Wilkinite 5~40%;
Above-mentioned solidify material is made up of cement, lime, flyash and gypsum, and each moiety mass ratio is a cement: lime: flyash: gypsum=(13-18): (1-4): (1-3): (1-3).
2. the dewatered sludge that Sewage Plant according to claim 1 produces is cured/method of stabilization treatment, it is characterized in that the shared weight percent of described each component:
Mud 65%,
Solidify material 15%,
Wilkinite 20%;
Above-mentioned solidify material is made up of cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=14: 3: 2: 1.
3. the dewatered sludge that Sewage Plant according to claim 1 produces is cured/method of stabilization treatment, it is characterized in that the shared weight percent of described each component:
Mud 60%,
Solidify material 20%,
Wilkinite 20%;
Above-mentioned solidify material is made up of cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=16: 2: 1: 1.
4. the dewatered sludge that Sewage Plant according to claim 1 produces is cured/method of stabilization treatment, it is characterized in that the shared weight percent of described each component:
Mud 30%,
Solidify material 30%,
Wilkinite 40%,
Above-mentioned solidify material is made up of cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=13: 4: 3: 3.
5. the dewatered sludge that Sewage Plant according to claim 1 produces is cured/method of stabilization treatment, it is characterized in that the shared weight percent of described each component:
Mud 80%,
Solidify material 15%,
Wilkinite 5%,
Above-mentioned solidify material is made up of cement, lime, flyash and gypsum, and the weight ratio between them is a cement: lime: flyash: gypsum=18: 1: 1: 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CNB2007101338759A CN100522854C (en) | 2007-10-12 | 2007-10-12 | Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2007101338759A CN100522854C (en) | 2007-10-12 | 2007-10-12 | Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant |
Publications (2)
Publication Number | Publication Date |
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CN101172749A CN101172749A (en) | 2008-05-07 |
CN100522854C true CN100522854C (en) | 2009-08-05 |
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CNB2007101338759A Expired - Fee Related CN100522854C (en) | 2007-10-12 | 2007-10-12 | Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant |
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Families Citing this family (26)
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CN102408179A (en) * | 2011-07-25 | 2012-04-11 | 江苏东方生态清淤工程有限公司 | Dewatered sludge solidifying agent |
CN102424511A (en) * | 2011-09-02 | 2012-04-25 | 重庆大学 | Solidification treatment method for sludge of urban sewage plant |
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2007
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