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 PDF

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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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CN
China
Prior art keywords
curing
solidify
gypsum
lime
cement
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Application number
CNB2007101338759A
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Chinese (zh)
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CN101172749A (en
Inventor
朱伟
李磊
张春雷
林城
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河海大学
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Application filed by 河海大学 filed Critical 河海大学
Priority to CNB2007101338759A priority Critical patent/CN100522854C/en
Publication of CN101172749A publication Critical patent/CN101172749A/en
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Publication of CN100522854C publication Critical patent/CN100522854C/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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

The dewatered sludge that Sewage Plant produces is cured/method of stabilization treatment

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.
CNB2007101338759A 2007-10-12 2007-10-12 Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant CN100522854C (en)

Priority Applications (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

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

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CN101172749A CN101172749A (en) 2008-05-07
CN100522854C true CN100522854C (en) 2009-08-05

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Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101633549B (en) * 2009-08-31 2011-09-07 江汉大学 Sludge conditioner and sludge dewatering method thereof
CN101805104B (en) * 2010-04-27 2012-11-28 河海大学 Soil treatment method for dredged sediment
CN101955345B (en) * 2010-09-29 2013-04-17 江苏艾特克环境工程设计研究院有限公司 Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge
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
US9382143B2 (en) 2011-11-02 2016-07-05 Empire Technology Development Llc Solidifying sludge
CN103159391A (en) * 2011-12-08 2013-06-19 宇星科技发展(深圳)有限公司 Sludge dewatering solidification treatment method
CN102659294A (en) * 2012-05-23 2012-09-12 重庆大学 Method for solidifying sludge of urban sewage treatment factory by using ardealite, coal ash and carbide slag
CN103979771B (en) * 2013-02-07 2016-03-30 株式会社Cmd技术团 Utilize the high-moisture-contensludge sludge solidifying agent of petroleum coke desulfurated plaster
CN103288330A (en) * 2013-07-10 2013-09-11 江苏坤泽科技股份有限公司 Freshwater sludge curing agent
CN104310884B (en) * 2014-10-08 2017-02-08 南京大学 Curing agent for attapulgite reinforced printing and dyeing sludge treatment and curing method thereof
CN104478058B (en) * 2014-11-04 2016-03-30 沈礼群 A kind of Gou Tang lake heavy metal agriculture chemical pollutes solidification remover and preparation method thereof
CN105819798B (en) * 2015-01-04 2018-05-22 三川德青科技有限公司 A kind of quick setting and high strength sludge consolidating agent and preparation method thereof
CN104609786A (en) * 2015-01-12 2015-05-13 枞阳县天筑新型建筑材料有限公司 Cold-proof outdoor concrete
CN105801056A (en) * 2016-04-13 2016-07-27 吴申龙 Efficient curing agent for treating sewer sludge and preparation method of efficient curing agent
CN105753279B (en) * 2016-04-15 2018-05-22 武汉美丽东方环保有限公司 A kind of silt/sludge solidifying agent and its application method
CN106277663A (en) * 2016-04-29 2017-01-04 天津城建大学 Sludge solidifying agent and application, sludge curing soil
CN106082903B (en) * 2016-06-17 2018-02-09 武汉大学 A kind of dredging silt composite curing agent
CN107586003A (en) * 2017-08-22 2018-01-16 北京融达环科新材料科技有限公司 Sludge treating agent and method for sludge treatment
CN107473684B (en) * 2017-09-11 2020-05-05 广州中科地化环保工程有限公司 Environment-friendly river bottom mud treatment agent

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