CN105731746A - Method for curing sludge for roadbed filling - Google Patents
Method for curing sludge for roadbed filling Download PDFInfo
- Publication number
- CN105731746A CN105731746A CN201610263770.4A CN201610263770A CN105731746A CN 105731746 A CN105731746 A CN 105731746A CN 201610263770 A CN201610263770 A CN 201610263770A CN 105731746 A CN105731746 A CN 105731746A
- Authority
- CN
- China
- Prior art keywords
- sludge
- soil
- stirred
- quick lime
- emulsified asphalt
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
-
- 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
- C02F11/008—Sludge treatment by fixation or solidification
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
Abstract
The invention relates to a method for curing sludge for roadbed filling. The method is characterized in that quick lime, emulsified asphalt and natural soil are adopted as curing materials, and the method comprises the following steps that 1, 5% to 15% of quick lime is added to the sludge with the moisture content of 65% to 85% to be stirred; 2, after the quick lime is stirred to be uniform, 5% to 10% of emulsified asphalt is added for secondary stirring; 3, after the emulsified asphalt is stirred to be uniform, 400% to 500% of natural soil is added to be stirred for the third time; 4, after the stirred sludge is cured for dry maintenance for 7 days, the sludge is directly used for roadbed filling. The method has the advantages that the treated sludge cured soil is high in strength, free of pollution and high in long-term stability. The sludge cured soil can be directly used for roadbed filling, waste is turned into wealth, and high economic benefits are achieved.
Description
Technical field
The present invention relates to a kind of solidification sludge method for Roadbed Soil, belong to resource and environment filed.Through this
Mud comprcssive strength after method solidification is big, pollutes character and eliminates, has long-time stability, can be directly used for
Roadbed Soil.
Background technology
Sewage sludge is the waste products after municipal sewage plant carries out sewage disposal, usually contains the most micro-
Biology, organic pollution, heavy metal etc., be a kind of complicated component, the pollutant of harmful substance high enrichment.
Along with quickening and the raising of environmental consciousness of China's Development of China's Urbanization, the generation amount of municipal sewage and treating capacity
Also getting more and more, accordingly, the generation amount of mud is also significantly increased.The end of the year 2010, at the town sewage of the whole nation
Reason amount is more than 30,000,000,000 m3, dewatered sludge generation amount reaches 30,000,000 tons.As can be seen here, if not to mud
Properly disposing, resident living and natural environment will certainly be caused huge danger by such substantial amounts of pollutant
Evil.
The mode of existing disposing sludge mainly has burning, agricultural use, landfill, building materials utilization etc..Burning is
Mud is carried out minimizing, innoxious most effective method the most thoroughly, but it is big to there is one-time investment, fortune
Row cost is high, and technology requires high drawback, is the most only used in a large number in Japan.Agricultural use achieves
Turning waste into wealth of mud, is the effective means of a kind of recycling sludge, but Land_use change there is also heavy metal
Exceed standard, pest and disease damage is propagated, seasonality utilizes the problem such as unbalanced and limits the popularization of itself.At landfill
Put low cost, technology requirement is low, capacity big, instant effect, it is adaptable to land resource is abundant but underdeveloped
Area, is the mud that mainly uses of China, but along with the further development in China city,
People ground contradiction, the mode of landfill stabilization mud is the most applicable.It is to control to pollute that building materials utilize
Thing, the cost-effective method of one that mud is turned waste into wealth, the mode that the present invention utilizes based on building materials, will
Mud is carried out after solidification and stabilization for Roadbed Soil, is the effective ways that utilize of a kind of recycling sludge.
Traditional sludge curing material mainly has cement, flyash, Calx, slag and clay mineral etc., Gu
Change mechanism mainly by various hydrated products mud wrapped up and solidify, reach to increase sludge intensity and
Control the purpose polluted.But the sludge curing soil basicity formed after using traditional method solidification is high, and pH value is usually
Reaching about 12, under the leaching of rainwater, leaching alkali liquor can be to the environment of surrounding.And along with
The decline of mud basicity, microorganism starts breeding and decomposes the Organic substance in sludge curing soil, reduces mud solid
Change the stability of soil, be easily caused solidification heap body unstable failure.Therefore, use the mud of traditional method solidification,
Polluting property fails to be completely eliminated, and long-time stability do not ensure, it is impossible to reach the requirement of Roadbed Soil, only
Landfill yard landfill can be used for, cause the burden of environment and the waste of resource.
Summary of the invention
The present invention is directed to the deficiency of existing sludge curing technology, it is provided that a kind of solidification sludge is for Roadbed Soil
Method, the intensity of sludge curing soil can be improved, can control again sludge pollution characteristic, ensure sludge curing
The long-time stability of soil, make sludge curing soil may be used for Roadbed Soil, reach the purpose turned waste into wealth.
For reaching above-mentioned purpose, the present invention provides techniques below solution:
A kind of solidification sludge is for the method for Roadbed Soil, and the moisture content of described mud is 65-85%, solidifies material
Material is quick lime, Colophonium, naturally soil.Shared by various components, percentage by weight is:
The method of the present invention comprises the following steps:
(1) municipal sewage sludge that moisture content is 65-85% is taken, on the basis of mud weight, in mud
Add the quick lime of 5-15%, tentatively stir mixing；
(2) after stirring, add the emulsified asphalt of 5-10%, carry out second time and stir；
(3), after second time stirs, add the soil naturally of 450-550%, carry out third time and stir；
(4) solidified earth stirred is carried out dry type maintenance 7 days, i.e. can be used for Roadbed Soil.
The invention have the advantages that
(1) a kind of solidification sludge is for the method for Roadbed Soil, after first step stirring adds quick lime, calculogenesis
Ash reacts with the water in mud.In this course of reaction, quick lime can absorb water, and the most also releases substantial amounts of
Heat, the moisture in evaporation mud, reaches the effect of dewatered sludge further.The calcium hydroxide that reaction generates
There is strong basicity, the Bactericidal effect that disappears, decomposition organic in suppression mud can be played.Reaction generates
Calcium hydroxide, after later stage carbonization, generates calcium carbonate, plays the effect strengthening firming body intensity.
(2), after second step stirring adds emulsified asphalt, emulsified asphalt can form parcel and bonding to mud.Breast
After changing Colophonium mummification, there is the highest intensity, play the effect increasing sludge curing soil intensity.Meanwhile, Colophonium
For hydrophobic material, and there is stronger acid resistance and alkali resistance, be possible to prevent the pollution in sludge curing soil
Thing and Calx alkali liquor are leached by rainwater.Package action due to Colophonium, moreover it is possible to make the internal holding of sludge curing soil
Long-term alkaline environment, thus suppress the growth of antibacterial, ensure the long-time stability of sludge curing soil.
(3) the 3rd step stirrings add nature soil, on the one hand can increase sludge curing soil intensity, the most then
The content of organic matter of sludge curing soil can be reduced, ensure the long-time stability of Roadbed Soil.
(4) the sludge curing soil intensity after processed by the invention is high, pollution-free, and has long-time stability,
Disclosure satisfy that the requirement of Roadbed Soil.
Detailed description of the invention
Embodiment 1
Take the dewatered sludge of urban sewage plant 100kg that moisture content is 80%, be initially charged the quick lime of 10kg, stir
After mixing uniformly, add the emulsified asphalt of 5kg, carry out second time and stir, after stirring, add 500kg
Naturally soil, carry out third time stir.Finally sludge curing soil is placed in curing field, after dry type maintenance 7 days,
Sludge curing soil comprcssive strength reaches 1000kPa.Show through toxicity characteristic leaching procedure result, each heavy metal species and having
The detected level of machine matter does not all exceed standard, and can meet Roadbed Soil requirement.
Embodiment 2
Take the dewatered sludge of urban sewage plant 100kg that moisture content is 80%, be initially charged the quick lime of 15kg, stir
After mixing uniformly, add the emulsified asphalt of 8kg, carry out second time and stir, after stirring, add 400kg
Naturally soil, carry out third time stir.Finally sludge curing soil is placed in curing field, after dry type maintenance 7 days,
Sludge curing soil comprcssive strength reaches 900kPa, can meet Roadbed Soil requirement.Tie through toxicity characteristic leaching procedure
Fruit display, each heavy metal species and organic detected level all do not exceed standard, and can meet Roadbed Soil requirement.
Claims (2)
1. a solidification sludge is for the method for Roadbed Soil, it is characterised in that use quick lime, emulsified asphalt, from
So soil is as curing materials, and shared by various components, percentage by weight is:
2. the method that a solidification sludge is used for Roadbed Soil, it is characterised in that comprise the following steps: 1) first toward containing
Water rate be 65-85% mud in add quick lime be stirred；2), after lime under agitation is uniform, emulsifying is added
Colophonium carries out second time and stirs；3), after emulsified asphalt stirs, add nature soil and carry out stirring for the third time；
4), after the sludge curing soil after stirring being carried out dry type maintenance 7 days, it is directly used in Roadbed Soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610263770.4A CN105731746A (en) | 2016-04-19 | 2016-04-19 | Method for curing sludge for roadbed filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610263770.4A CN105731746A (en) | 2016-04-19 | 2016-04-19 | Method for curing sludge for roadbed filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105731746A true CN105731746A (en) | 2016-07-06 |
Family
ID=56285582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610263770.4A Pending CN105731746A (en) | 2016-04-19 | 2016-04-19 | Method for curing sludge for roadbed filling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105731746A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107162366A (en) * | 2017-07-05 | 2017-09-15 | 安徽潜润环保科技有限公司 | A kind of solidification method of disposal of municipal sewage |
| CN111622208A (en) * | 2020-06-12 | 2020-09-04 | 中铁隧道局集团有限公司 | Construction method for filling adjacent roadbed by in-situ solidified sludge of rail-to-subway foundation pit |
| CN115259713A (en) * | 2022-07-04 | 2022-11-01 | 上海城市水资源开发利用国家工程中心有限公司 | Method for replacing different layer position materials of road with sludge incineration residues with different particle sizes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05192695A (en) * | 1991-08-23 | 1993-08-03 | Ribaa Furonto Seibi Center | Soil quality improvement of construction surplus soil |
| CN1381316A (en) * | 2001-04-17 | 2002-11-27 | 上海华标质量认证咨询有限公司 | Process for treating sludge of sewer |
-
2016
- 2016-04-19 CN CN201610263770.4A patent/CN105731746A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05192695A (en) * | 1991-08-23 | 1993-08-03 | Ribaa Furonto Seibi Center | Soil quality improvement of construction surplus soil |
| CN1381316A (en) * | 2001-04-17 | 2002-11-27 | 上海华标质量认证咨询有限公司 | Process for treating sludge of sewer |
Non-Patent Citations (2)
| Title |
|---|
| V.BEDNARIK 等: "Stabilization/solidification of galvanic sludges by asphalt emulsions", 《JOURNAL OF HAZARDOUS MATERIALS》 * |
| 邹小钢 主编: "《环境保护工作创新与发展（上）》", 30 April 2009 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107162366A (en) * | 2017-07-05 | 2017-09-15 | 安徽潜润环保科技有限公司 | A kind of solidification method of disposal of municipal sewage |
| CN111622208A (en) * | 2020-06-12 | 2020-09-04 | 中铁隧道局集团有限公司 | Construction method for filling adjacent roadbed by in-situ solidified sludge of rail-to-subway foundation pit |
| CN111622208B (en) * | 2020-06-12 | 2022-03-29 | 中铁隧道局集团有限公司 | Construction method for filling adjacent roadbed by in-situ solidified sludge of rail-to-subway foundation pit |
| CN115259713A (en) * | 2022-07-04 | 2022-11-01 | 上海城市水资源开发利用国家工程中心有限公司 | Method for replacing different layer position materials of road with sludge incineration residues with different particle sizes |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160706 |
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| WD01 | Invention patent application deemed withdrawn after publication |