CN106865926A - One kind has filled municipal sludge curing agent and its deep dehydration method - Google Patents
One kind has filled municipal sludge curing agent and its deep dehydration method Download PDFInfo
- Publication number
- CN106865926A CN106865926A CN201710137689.6A CN201710137689A CN106865926A CN 106865926 A CN106865926 A CN 106865926A CN 201710137689 A CN201710137689 A CN 201710137689A CN 106865926 A CN106865926 A CN 106865926A
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- Prior art keywords
- sludge
- curing agent
- municipal sludge
- deep dehydration
- landfill
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Classifications
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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
- C02F11/008—Sludge treatment by fixation or solidification
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
本发明公开了一种已填埋市政污泥固化剂及其深度脱水方法，属于市政污泥处理领域。填埋市政污泥一方面在填埋前已添加一定比例固化剂，增加了二次深度脱水处理难度，另一方面填埋污泥在厌氧环境中发生复杂的生化反应，含水率又会增加，且污泥成分变得更加复杂。针对填埋市政污泥特性，使用固化剂包括电石渣、硫铝酸盐水泥、矿粉、粉煤灰和铁盐，按一定的污泥干基百分比、添加顺序和搅拌时间添加，对污泥进行调理，有效改善污泥的脱水性能，使污泥中的胶体颗粒脱稳、絮凝，脱去大量水分，为污泥的深度脱水营造基础条件，脱水后泥饼含水率可降至50％‑60％。本发明解决了已填埋市政污泥深度脱水问题，脱水后污泥可作资源化利用。固化剂易于获得且价格低廉。The invention discloses a solidifying agent for landfilled municipal sludge and a deep dehydration method thereof, belonging to the field of municipal sludge treatment. On the one hand, a certain proportion of curing agent has been added to landfill municipal sludge, which increases the difficulty of secondary deep dehydration treatment. On the other hand, landfill sludge undergoes complex biochemical reactions in an anaerobic environment, and the moisture content will increase. , and the sludge composition becomes more complex. According to the characteristics of landfill municipal sludge, solidifying agents including calcium carbide slag, sulphoaluminate cement, mineral powder, fly ash and iron salt are used according to a certain percentage of sludge dry basis, adding order and stirring time. Conditioning can effectively improve the dehydration performance of the sludge, destabilize and flocculate the colloidal particles in the sludge, remove a large amount of water, and create basic conditions for the deep dehydration of the sludge. After dehydration, the moisture content of the mud cake can be reduced to 50%‑ 60%. The invention solves the problem of deep dehydration of landfilled municipal sludge, and the dehydrated sludge can be used for resource utilization. Curing agents are readily available and inexpensive.
Description
Technical field
Municipal sludge curing agent and its deep dehydration side have been filled the invention belongs to field of sludge treatment, more particularly to one kind
Method.
Background technology
Substantial amounts of sludge can be produced in sewage disposal process, its quality accounts for processing the 0.3%-0.5% of water, by
In the end of the year 2015, the sludge yield of national urban wastewater treatment firm is up to more than 35,000,000 tons/year, it is contemplated that to the year two thousand twenty, sludge yield
Will be up to 60,000,000 tons/year.Current sludge treatment approach topmost in the world includes agricultural use, sanitary landfills, burning and sea
Ocean jettisons, and China mainly uses the methods such as landfill, compost, desiccation, burning for the treatment and disposal of sludge, at these four
Reason mode accounting is respectively 65%, 15%, 6% and 3%.Consider environmental benefit and economic benefit, whole nation cities and towns are dirty at present
The sludge of water treatment plant has turned into the major way of China's sludge treatment by carrying out sanitary landfills after press filtration, and following one
Still will be the main sludge treating method of China in individual period.
China's land resource is limited, and the sludge for continually producing is caused by landfill to surrounding enviroment and the ecosystem
Many harm, and the land resource of preciousness is taken, especially in the eastern region that China's land resource is the most in short supply, without conjunction
When suitable disposal technology and no extraneous region is available for Sludge landfill, will fill the further volume reduction of sludge turns into what is explored now
Direction.
Sludge components are complicated, are the collection of organic matter and the inorganic matter composition of the zoogloea and its absorption of multiple-microorganism formation
Zoarium, in sludge in addition to containing substantial amounts of moisture, also containing heavy metal, hardly degraded organic substance and salt, and pathogen, virus
Microorganism and parasitic ovum etc., with easy smelly, perishable property.Because the high-hydrophilic of sludge to it, it is necessary to adjust
Manage to change the physicochemical characteristics and component on mud granule surface, so that the colloform texture destroyed inside sludge, reaches improvement
The purpose of dewatering performance of sludge.Press《Consumer waste filling and embedding Environmental capacity standard》(GB16889-2008) specify：At sanitary sewage
Reason factory sludge moisture content after treatment is less than 60% can just enter household refuse landfill sites landfill stabilization.Therefore it is new to produce dirt
Mud can be nursed one's health in sewage treatment plant by dosing, and carry out landfill after press filtration.So, landfill municipal sludge is on the one hand added
Curing agent is crossed, the biochemistry that further deep dehydration difficulty is bigger, and on the other hand complexity can occur in sludge sump is filled is carried out
Reaction, moisture content can increase again, and sludge components become more complicated.And at present for the research of curing agent and its dewatering
And application is concentrated mainly on river and lake silt and fresh municipal sludge, for having filled municipal sludge curing agent and its deep dehydration
The research of method there is no precedent.This is directed to, the present invention is proposed.
The content of the invention
The technical problems to be solved by the invention be to provide a kind of low cost, process time is short, sedimentation rate of impurities
The fast, municipal sludge of the landfill curing agent and its deep dehydration method that degree of dehydration is high.
To realize above-mentioned technical problem, the technical scheme that the present invention is provided is：
One kind landfill municipal sludge curing agent, it is characterised in that：
The curing agent includes carbide slag, sulphate aluminium cement, miberal powder, flyash and molysite, each group in the curing agent
Split-phase is respectively for the percentage of sludge butt：
Carbide slag：37.5%-62.5%；
Sulphate aluminium cement：12.5%-25%；
Miberal powder：6.25%-12.5%；
Flyash：6.25%-12.5%；
Molysite：2.75%-3.25%.
Above-mentioned sludge butt refers to the quality of over dry sludge in wet mud.
The dewatering of the above-mentioned curing agent that the present invention is used is：
(1) after carbide slag being dissolved in into water, add under agitation, stir 5-10min, make mixing more uniform.Calcium carbide
Slag main component is calcium hydroxide, also there is the calcium carbide not reacted completely, can meet water and react, and releases substantial amounts of heat, and
Generation calcium hydroxideIts effect and the basically identical (CaO+H of quick lime2O=Ca
(OH)2), the free water in sludge can be sloughed；Calcium ion can be with electronegative group knot in sludge extracellular polymeric (EPS)
Close, increase floc strength, isolate the combination water in sludge.
(2) sulphate aluminium cement is subsequently added into, 3-5min is stirred.Sulphate aluminium cement is mainly with anhydrous sulphur (iron) aluminic acid
Calcium and dicalcium silicate are the novel concrete of main mineral composition.
(3) miberal powder is added after, 3-5min is stirred.After miberal powder generally refers to for mined ore to carry out pulverizing processing
Resulting feed powder.
(4) flyash is added, 5-8min is stirred.Mainly by SiO2、CaO、Al2O3, MgO, FeO and Fe2O3Deng chemicals
Matter is constituted, and particle inside easily forms loose structure, and specific surface area is larger, high adsorption capacity, after mixing with sludge, destroys sludge
The stabilization of colloidal solid, mutual aggregation forms bulky grain between making scattered little particle, produces and electrically neutralize and adsorption bridging
Effect, can isolate sludge absorption water.
(5) molysite is eventually adding, the sludge after conditioning is pumped into filter press after stirring 10-15min carries out press filtration.Using dirt
The electronegativity of mud and the polar group on mud granule surface, add the Ferric Salt Flocculants of positively charged, by compressing colloid electric double layer
With the reagentia such as absorption-charge neutrality, so as to improve the dewatering of sludge, make the de- steady, flocculation of colloidal solid.Described molysite
It is ferric trichloride or ferric sulfate etc..
Present invention has the advantages that：
(1) effect of carbide slag in sludge dewatering conditioning is basically identical with quick lime, can effectively slough the trip in sludge
From water and water is combined, its price is only the 1/4-1/5 of quick lime.
(2) sulphate aluminium cement can have special efficiency to poisonous, harmful components consolidations in sludge, and miberal powder can increase de-
Mud cake intensity after water, therefore addition sulphate aluminium cement and miberal powder can further promote the resource profit after sludge conditioning dehydration
With, greening soil can be made, compost is disposed, brickmaking, haydite etc..
(3) flyash has larger discharge capacity as a kind of common industrial residue in China, cheap, and itself is again
Belong to easily dehydration material, the curing agent to be formed is combined with carbide slag can both improve dewatering performance of sludge, and generation is solidifying rigid to answer
Miscellaneous hydroxide, occurs electrically to neutralize the volume effect of sweeping, and forms big more uniform flocculation structure, and sludge can be controlled again
pH。
(4) molysite belongs to inorganic sludge conditioning flocculant, and flocculating effect is good, and price is cheap compared with aluminium salt, is wadded a quilt with cotton compared to macromolecule
It is more simple and easy to get for solidifying agent.
(5) with above-mentioned landfill municipal sludge curing agent and its dewatering, can make it is added cross curing agent, in sludge
There is the biochemical reaction of complexity in hole, moisture content increases, composition becomes more complicated landfill municipal sludge and slough a large amount of water
Point, moisture content of the cake can be down to 50%-60% after dehydration, and mud cake intensity is big, and harmful components are few, be conducive to follow-up resource profit
With.
Specific embodiment
Municipal sludge curing agent and its deep dehydration method have been filled the invention discloses one kind.The landfill side of municipal sludge one
Certain proportion curing agent and high polymer coagulant have been added in face before landfill, increased secondary deep dewatering intractability, another
Aspect can occur the biochemical reaction of complexity in landfill sludge in anaerobic environment, and moisture content can increase again, and sludge components become
It is more complicated.For landfill municipal sludge characteristic, the present invention design curing agent include carbide slag, sulphate aluminium cement, miberal powder,
Flyash and molysite, add according to certain butt sludge percentage, and in use according to certain order of addition and stirring
Time is carried out, and can be effectively improved the dewatering of sludge, and structural behaviour, water the reason characteristic to sludge, physical and mechanical property enter
Row conditioning, makes the de- steady, flocculation of the colloidal solid in sludge, sloughs large quantity of moisture, is that the deep dehydration of sludge builds basic condition,
Moisture content of the cake can be down to 50%-60% after dehydration.The present invention solves the problems, such as to have filled municipal sludge deep dehydration, dehydration
Sludge can make greening soil, compost disposal, brickmaking, haydite etc..Curing agent is easily obtained and cheap.With reference to specific reality
The present invention is described in further detail to apply example.
The landfill municipal sludge in certain Sludge landfill area is taken, moisture content is 80%, butt quality is 16kg, is poured into conditioning
In homogenizing bucket.After carbide slag is dissolved, add under agitation, stir 5-10min, the carbide slag is special purchased from Shanghai Pujiang
Plant gas Co., Ltd；Sulphate aluminium cement is subsequently added into, 3-5min is stirred, the sulphate aluminium cement is purchased from Yicheng An Date
Plant Cement Co., Ltd；Miberal powder is added afterwards, 3-5min is stirred, and the miberal powder is purchased from Hebei Ke Xu building materials Co., Ltd；Again plus
Enter flyash, stir 5-8min, flyash is three-level ash, purchased from new energy Development Co., Ltd of Yangzhou China Telecom.；It is eventually adding three
Ferric chloride solution, mass fraction is 38%, purchased from Shanghai Huan Fa Chemical Co., Ltd.s, will be adjusted in homogenizing bucket after stirring 10-15min
Sludge after reason is pumped into and carry out in compact board frame pressure filter experiment machine press filtration, curing agent addition and by plate compression testing machine pressure
Moisture content of the cake after filter is shown in Table 1.
Each embodiment curing agent addition of table 1 and moisture content of the cake
Embodiment of above is only the present invention more preferably mode, is not intended to limit the invention, all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (2)
1. one kind has filled municipal sludge curing agent, it is characterised in that the curing agent comprising carbide slag, sulphate aluminium cement,
Miberal powder, flyash and molysite, each component is respectively relative to the ratio between sludge butt in the curing agent：
Carbide slag：37.5%-62.5%；
Flyash：6.25%-12.5%；
Sulphate aluminium cement：12.5%-25%；
Miberal powder：6.25%-12.5%；
Molysite：2.75%-3.25%；
Above-mentioned sludge butt refers to the quality of over dry sludge in wet mud.
2. a kind of deep dehydration method for having filled municipal sludge curing agent according to claim 1, it is characterised in that bag
Include following steps：
(1) after carbide slag first being dissolved in into water, add under agitation, stir 5-10min.
(2) sulphate aluminium cement is subsequently added into, 3-5min is stirred.
(3) miberal powder is added after, 3-5min is stirred.
(4) flyash is added, 5-8min is stirred.
(5) molysite is eventually adding, 10-15min is stirred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137689.6A CN106865926A (en) | 2017-03-09 | 2017-03-09 | One kind has filled municipal sludge curing agent and its deep dehydration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137689.6A CN106865926A (en) | 2017-03-09 | 2017-03-09 | One kind has filled municipal sludge curing agent and its deep dehydration method |
Publications (1)
| Publication Number | Publication Date |
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| CN106865926A true CN106865926A (en) | 2017-06-20 |
Family
ID=59170370
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710137689.6A Pending CN106865926A (en) | 2017-03-09 | 2017-03-09 | One kind has filled municipal sludge curing agent and its deep dehydration method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606547A (en) * | 2020-04-17 | 2020-09-01 | 路德环境科技股份有限公司 | Municipal sludge treatment method and equipment |
| CN112159052A (en) * | 2020-09-24 | 2021-01-01 | 广州珠科院工程勘察设计有限公司 | Quick dehydration curing agent |
| CN113149377A (en) * | 2021-02-09 | 2021-07-23 | 虞克夫 | Dewatered sludge curing agent, preparation method and use method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606547A (en) * | 2020-04-17 | 2020-09-01 | 路德环境科技股份有限公司 | Municipal sludge treatment method and equipment |
| CN112159052A (en) * | 2020-09-24 | 2021-01-01 | 广州珠科院工程勘察设计有限公司 | Quick dehydration curing agent |
| CN113149377A (en) * | 2021-02-09 | 2021-07-23 | 虞克夫 | Dewatered sludge curing agent, preparation method and use method |
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