CN102424511A - Solidification treatment method for sludge of urban sewage plant - Google Patents

Solidification treatment method for sludge of urban sewage plant Download PDF

Info

Publication number
CN102424511A
CN102424511A CN2011102574863A CN201110257486A CN102424511A CN 102424511 A CN102424511 A CN 102424511A CN 2011102574863 A CN2011102574863 A CN 2011102574863A CN 201110257486 A CN201110257486 A CN 201110257486A CN 102424511 A CN102424511 A CN 102424511A
Authority
CN
China
Prior art keywords
sludge
cement
lime
flyash
solidifying agent
Prior art date
Application number
CN2011102574863A
Other languages
Chinese (zh)
Inventor
周健
卿晓霞
方俊华
詹芹
周炯
刘杰
韩懿
何雨舟
Original Assignee
重庆大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 重庆大学 filed Critical 重庆大学
Priority to CN2011102574863A priority Critical patent/CN102424511A/en
Publication of CN102424511A publication Critical patent/CN102424511A/en

Links

Abstract

The invention discloses a solidification treatment method for sludge of urban sewage plants. The method comprises the following steps of (1) adding curing agent consisting of lime, sulfate aluminum cement, portland cement and fly ash in dehydrated sludge based on the weight of the dehydrated sludge, wherein the weight percentage of lime, sulfate aluminum cement, portland cement and fly ash in the curing agent are as follows: 1.2-1.9% of lime, 3.0-6.1% of sulfate aluminum cement, 3.0-3.7% of portland cement and 4.7-6.0% of fly ash; and (2) mixing the sludge added with the curing agent to form precursors of solidified blocks, piling the precursors up according to a height of 7 cm, and covering with waterproof membrane, maintaining the precursors for three days with a dry maintaining method, and forming sludge solidified blocks. The method provided by the invention has the advantages of efficiency, low cost, simple operation and the like.

Description

A kind of solidification processing method of municipal sewage sludge

Technical field

The invention belongs to field of environment engineering technology, be specifically related to a kind of solidification processing method of municipal sewage sludge.

Background technology

At present, the disposal options of municipal sewage sludge is mainly landfill, soil utilization, building materials utilization etc.Wherein, it is the Sludge Disposal Techniques of a comparative maturity that the mud landfill is disposed, and one of its advantage is that processing cost is low, the 2nd, and treating processes is simple, has solved the mud problem of outlet quickly; The rheological of mud made when shortcoming was mud and domestic garbage mixing landfill msw landfill easy deformation, landslide, landslide becomes artificial " swampland ", has great potential safety hazard; The HV of mud causes machineries such as cram packer, dozer, excavator to skid, falls into car, can't normally carry out landfill operation etc.Therefore, sludge landfill often need add stopping composition such as a large amount of sand, soil to mud, but this method makes not only the cost of mud landfill increase greatly, has also reduced the useful volume of landfill yard in mud landfill process both at home and abroad.

In order to guarantee the normal operation of refuse landfill; Must carry out pre-treatment such as mummification or curing to dewatered sludge to reduce water ratio (< 60%) and to improve mechanical property; After making it satisfy " urban wastewater treatment firm sludge disposal-mixing landfill is used shale " /> (GBT 23485-2009), could mix landfill with domestic refuse.Yet existing sludge curing technology exists that curing time is long, floor space is big, processing cost is higher, and problem such as usefulness is low under the coldcondition.

Summary of the invention

The object of the present invention is to provide a kind of solidification processing method of municipal sewage sludge, it can be cured mud fast and solidify increase-volume than little, to solidify usefulness high, make mud after the curing can satisfy landfill yard and mix standard of landfill.

The solidification processing method of a kind of municipal sewage sludge of the present invention is characterized in that comprising the following steps:

(1) be benchmark with dewatered sludge weight; In dewatered sludge, add the solidifying agent of being made up of lime, aluminosulfate cement, silicate cement and flyash, its weight percent is: lime 1.2 ~ 1.9%, aluminosulfate cement 3.0 ~ 6.1%, silicate cement 3.0 ~ 3.7%, flyash 4.7 ~ 6.0%;

(2) mud that has added solidifying agent is mixed formation cured block precursor, stack, and cover upward waterproof membrane, adopt dry type maintenance process maintenance 3 days, form the sludge curing piece according to the height of 7cm.

Constantly repeat above step (1) and (2), thereby accomplish the curing to all mud of municipal wastewater treatment plant, the mud after the curing reaches the mixing standard of landfill.

Further, above-mentioned steps (1) is when temperature is 10 ± 2 ℃, and the weight percent of the solidifying agent of interpolation is lime 1.9%, aluminosulfate cement 6.1%, silicate cement 3.7%, flyash 6.0%.

Further, above-mentioned steps (1) is when temperature is 20 ± 2 ℃, and the weight percent of the solidifying agent of interpolation is lime 1.7%, aluminosulfate cement 3.9%, silicate cement 3.0%, flyash 6.0%.

Further, above-mentioned steps (1) is when temperature is 30 ± 2 ℃, and the weight percent of the solidifying agent of interpolation is lime 1.2%, aluminosulfate cement 3.0%, silicate cement 3.0%, flyash 4.7%.

The present invention adopts complex cement as solidifying agent dewatered sludge to be cured.Curing agent component is lime, aluminosulfate cement, silicate cement and flyash; Mix the back with dewatered sludge hydration reaction formation cured body takes place; There are crystalline substances such as a large amount of lime carbonate, lime carbonate silicate cement compound and quartz in the cured body; These materials combine to form eutectic with mud granule preferably, and hydrated calcium silicate and calcium aluminate gelatinous mass connect particle simultaneously, reduce gap between particles; And the dual function of the filling of small amount of calcium aluminite and support has remedied the insufficient problem of simple hydrated cementitious product cementation preferably, and the strength ratio dewatered sludge of cured body is significantly improved; Simultaneously, hydrated product has stable and sealing process to pollution substance, reduces the harm of mud to environment.

The present invention adopts less solidifying agent to realize the curing to mud, and the cured body increase-volume is than little; After dewatered sludge solidifies through solidifying agent, curing time only needed 3 days and under 10 ± 2 ℃ temperature condition usefulness greatly improve, reached the mixing standard of landfill; Mud after the curing has advantages of higher compressive strength and anti-immersion ability, the low toxicity that leaches, and at medium-term and long-term the stable of form and chemical property that keep of landfill yard; Financial cost is low, and the curing cost of three kinds of following 1 ton of mud of temperature condition calculates by market value in 2011 and is respectively 78.7 yuan, 56.0 yuan and 45.4 yuan, significantly reduces than the solidification method of independent cement and solidification method cost commonly used at present, has good and economic; One of the solidifying agent that adopts flyash is the industrial waste material, and low price and wide material sources can reduce the treatment and disposal problem that the curing cost has solved flyash again as subsidiary material, the protection environment.Have efficient, low-cost, simple operation and other advantages.

Embodiment

Through concrete embodiment technical scheme of the present invention is described further below, following examples do not constitute qualification of the present invention.

Embodiment 1: in temperature is under 10 ± 2 ℃ of conditions, gets 1 ton of water ratio and be 81.1% dewatered sludge of urban sewage plant; With dewatered sludge weight is benchmark, and curing agent component (being lime, aluminosulfate cement, silicate cement, flyash) is prepared according to lime 19kg, aluminosulfate cement 61kg, silicate cement 37kg, flyash 60kg, is added in the dewatered sludge solidifying agent and mixing and stirring; 7cm stacks by height; Add waterproof membrane, adopt dry type method of curing maintenance 3 days, the unconfined compression strength of sludge curing piece reaches 72.71kpa; Water ratio reaches 59.97%; Leaching pollutent COD (being chemical oxygen demand) clearance is 82.11%, and ammonia-N removal rate is 92.19%, satisfies and mixes standard of landfill.Calculate by market value in 2011, under this temperature condition, solidifying 1 ton of required solidifying agent expense of mud is 78.7 yuan, compares curing at present commonly used, and cost significantly reduces.

Embodiment 2:In temperature is under 20 ± 2 ℃ of conditions, gets 1 ton of water ratio and be 81.1% dewatered sludge of urban sewage plant; With dewatered sludge weight is benchmark, and curing agent component (being lime, aluminosulfate cement, silicate cement, flyash) is prepared according to lime 17kg, aluminosulfate cement 39kg, silicate cement 30kg, flyash 60kg, is added in the dewatered sludge solidifying agent and mixing and stirring; 7cm stacks by height; Add waterproof membrane, adopt dry type method of curing maintenance 3 days, the unconfined compression strength of sludge curing piece reaches 81.04kpa; Water ratio reaches 59.79%; Leaching pollutent COD clearance is 80.57%, and ammonia-N removal rate is 92.37%, satisfies and mixes standard of landfill.Calculate by market value in 2011, under this temperature condition, solidifying 1 ton of required solidifying agent expense of mud is 56.0 yuan, compares curing at present commonly used, and cost significantly reduces.

Embodiment 3:In temperature is under 30 ± 2 ℃ of conditions, gets 1 ton of water ratio and be 81.1% dewatered sludge of urban sewage plant; With dewatered sludge weight is benchmark, and curing agent component (being lime, aluminosulfate cement, silicate cement, flyash) is prepared according to lime 12kg, aluminosulfate cement 30kg, silicate cement 30kg, flyash 47kg, is added in the dewatered sludge solidifying agent and mixing and stirring; 7cm stacks by height; Add waterproof membrane, adopt dry type method of curing maintenance 3 days, the unconfined compression strength of sludge curing piece reaches 127.54kpa; Water ratio reaches 58.51%; Leaching pollutent COD clearance is 80.28%, and ammonia-N removal rate is 92.22%, satisfies and mixes standard of landfill.Calculate by market value in 2011, under this temperature condition, solidifying 1 ton of required solidifying agent expense of mud is 45.4 yuan, compares curing at present commonly used, and cost significantly reduces.

Claims (4)

1. the solidification processing method of a municipal sewage sludge is characterized in that comprising the following steps:
(1) be benchmark with dewatered sludge weight; In dewatered sludge, add the solidifying agent of being made up of lime, aluminosulfate cement, silicate cement and flyash, its weight percent is: lime 1.2 ~ 1.9%, aluminosulfate cement 3.0 ~ 6.1%, silicate cement 3.0 ~ 3.7%, flyash 4.7 ~ 6.0%;
(2) mud that has added solidifying agent is mixed formation cured block precursor, stack, and cover upward waterproof membrane, adopt dry type maintenance process maintenance 3 days, form the sludge curing piece according to the height of 7cm.
2. the solidification processing method of a kind of municipal sewage sludge according to claim 1; It is characterized in that: when temperature was 10 ± 2 ℃, the weight percent of the solidifying agent of interpolation was lime 1.9%, aluminosulfate cement 6.1%, silicate cement 3.7%, flyash 6.0%.
3. the solidification processing method of a kind of municipal sewage sludge according to claim 1; It is characterized in that: when temperature was 20 ± 2 ℃, the weight percent of the solidifying agent of interpolation was lime 1.7%, aluminosulfate cement 3.9%, silicate cement 3.0%, flyash 6.0%.
4. the solidification processing method of a kind of municipal sewage sludge according to claim 1; It is characterized in that: when temperature was 30 ± 2 ℃, the weight percent of the solidifying agent of interpolation was lime 1.2%, aluminosulfate cement 3.0%, silicate cement 3.0%, flyash 4.7%.
CN2011102574863A 2011-09-02 2011-09-02 Solidification treatment method for sludge of urban sewage plant CN102424511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102574863A CN102424511A (en) 2011-09-02 2011-09-02 Solidification treatment method for sludge of urban sewage plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011102574863A CN102424511A (en) 2011-09-02 2011-09-02 Solidification treatment method for sludge of urban sewage plant

Publications (1)

Publication Number Publication Date
CN102424511A true CN102424511A (en) 2012-04-25

Family

ID=45958554

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011102574863A CN102424511A (en) 2011-09-02 2011-09-02 Solidification treatment method for sludge of urban sewage plant

Country Status (1)

Country Link
CN (1) CN102424511A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN103130396A (en) * 2013-03-11 2013-06-05 绍兴伊诺环保科技有限公司 Sludge modification method
CN103304115A (en) * 2013-06-17 2013-09-18 昆明理工大学 Harmless treatment method for transforming copper sludge to arenolite
CN103449692A (en) * 2013-09-04 2013-12-18 湖南大学 Method for solidifying and stabilizing sludge
CN104671635A (en) * 2015-01-27 2015-06-03 上海隧道工程有限公司 Construction method for treating waste mud produced during bored pile construction
CN105174686A (en) * 2015-10-12 2015-12-23 北京高能时代环境技术股份有限公司 Curing agent for curing and stabilizing municipal dewatered sludge and preparation method and application of curing agent
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
CN106865926A (en) * 2017-03-09 2017-06-20 中交疏浚技术装备国家工程研究中心有限公司 One kind has filled municipal sludge curing agent and its deep dehydration method
CN107381990A (en) * 2017-08-30 2017-11-24 湖南军信环保股份有限公司 A kind of method of sludge curing
CN109053101A (en) * 2018-10-12 2018-12-21 江苏科技大学 The construction method of modified sewage sludge and preparation method thereof as well as cover soil material
CN111348813A (en) * 2020-03-25 2020-06-30 江苏坤泽科技股份有限公司 Silt solidified soil with ultrahigh water stability

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544355A (en) * 1978-09-27 1980-03-28 Tokuyama Soda Co Ltd Hardening method for organic sludge
JPS5644100A (en) * 1979-09-17 1981-04-23 Takenaka Komuten Co Ltd Dehydration/caking treating method of sludge
CN101050046A (en) * 2007-05-10 2007-10-10 上海交通大学 Treatment method for solidifying sludge of sewage plant in city
CN101172749A (en) * 2007-10-12 2008-05-07 河海大学 Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544355A (en) * 1978-09-27 1980-03-28 Tokuyama Soda Co Ltd Hardening method for organic sludge
JPS5644100A (en) * 1979-09-17 1981-04-23 Takenaka Komuten Co Ltd Dehydration/caking treating method of sludge
CN101050046A (en) * 2007-05-10 2007-10-10 上海交通大学 Treatment method for solidifying sludge of sewage plant in city
CN101172749A (en) * 2007-10-12 2008-05-07 河海大学 Solidifying agent for solidifying and stabilizing treatment of generated dewatered sludge in sewage plant

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN103130396A (en) * 2013-03-11 2013-06-05 绍兴伊诺环保科技有限公司 Sludge modification method
CN103304115A (en) * 2013-06-17 2013-09-18 昆明理工大学 Harmless treatment method for transforming copper sludge to arenolite
CN103304115B (en) * 2013-06-17 2014-08-06 昆明理工大学 Harmless treatment method for transforming copper sludge to arenolite
CN103449692A (en) * 2013-09-04 2013-12-18 湖南大学 Method for solidifying and stabilizing sludge
CN104671635A (en) * 2015-01-27 2015-06-03 上海隧道工程有限公司 Construction method for treating waste mud produced during bored pile construction
CN104671635B (en) * 2015-01-27 2017-03-08 上海隧道工程有限公司 For processing the construction method of bored pile construction discarded slurry
CN105174686A (en) * 2015-10-12 2015-12-23 北京高能时代环境技术股份有限公司 Curing agent for curing and stabilizing municipal dewatered sludge and preparation method and application of curing agent
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
CN106865926A (en) * 2017-03-09 2017-06-20 中交疏浚技术装备国家工程研究中心有限公司 One kind has filled municipal sludge curing agent and its deep dehydration method
CN107381990A (en) * 2017-08-30 2017-11-24 湖南军信环保股份有限公司 A kind of method of sludge curing
CN109053101A (en) * 2018-10-12 2018-12-21 江苏科技大学 The construction method of modified sewage sludge and preparation method thereof as well as cover soil material
CN111348813A (en) * 2020-03-25 2020-06-30 江苏坤泽科技股份有限公司 Silt solidified soil with ultrahigh water stability

Similar Documents

Publication Publication Date Title
CN105970979B (en) A kind of ecological bank protecting method based on utilizing solidified earth from sludge
CN104291749B (en) A kind of concrete material and preparation method thereof
Cihangir et al. Utilisation of alkali-activated blast furnace slag in paste backfill of high-sulphide mill tailings: effect of binder type and dosage
CN102712548B (en) Methods and compositions using calcium carbonate
Van Jaarsveld et al. The potential use of geopolymeric materials to immobilise toxic metals: Part I. Theory and applications
Dwivedi et al. Fly ash–waste management and overview: A Review
US20160347658A1 (en) Healing agent for self-healing cementious material
CN102503263B (en) Building hollow brick using industrial tailings and preparation method thereof
CN101182143B (en) Preparation of composite high-expansion cementing material by using industrial slag and preparation technique thereof
CN102153326B (en) Curing agent for soft soil and application thereof
CN101637936B (en) Method for producing baking-free bricks by using phosphorous gypsum based cementitious material to solidify yellow phosphorous slags
CN104487458B (en) Use the method and system of calcium carbide lime
EP1720809B1 (en) Construction material based upon a sludge or sludged waste material
CN101602589B (en) Preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and preparation method thereof
CN104310918A (en) Cement-based composite material used for 3D printing technology as well as preparation method and application thereof
CN102344813B (en) Curing agent for curing marine poor subsoil
CN106116327A (en) A kind of pervious concrete utilizing solid-state castoff to produce and preparation method thereof
KR101198327B1 (en) Method for Manufacturing Lightweight Construction Material Using Waste Sludge
CN101713234B (en) Non-autoclaved and unburned brick and preparation method thereof
CN103626447A (en) Ecological permeable pavement brick and preparation method thereof
CN101570037B (en) Method for preparing construction material by utilizing electrolytic manganese slag
CN102060480B (en) Composite curing agent for dredged silt in watercourse
CN104909816A (en) Sintering swelled ultra-lightweight ceramsite produced by using silt and manufacturing method thereof
CN104876500A (en) Self-compacting powder concrete for ocean engineering as well as preparation method and application
CN101955345A (en) Neutral inorganic composite material for dehydration, solidification and modification of high water content sludge

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120425