CN106986522A - A kind of flocculation dewatering agent and preparation method thereof - Google Patents
A kind of flocculation dewatering agent and preparation method thereof Download PDFInfo
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- CN106986522A CN106986522A CN201710308113.1A CN201710308113A CN106986522A CN 106986522 A CN106986522 A CN 106986522A CN 201710308113 A CN201710308113 A CN 201710308113A CN 106986522 A CN106986522 A CN 106986522A
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- sludge
- dewatering agent
- flocculation dewatering
- polyacrylamide
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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
- C02F11/12—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
Abstract
The invention discloses a kind of flocculation dewatering agent, the weight proportion of its each component is：10 15 parts of potato starch acrylamnide graft copolymer, 15 parts of aluminium chloride, 15 parts of polyacrylamide, 15 parts of modification infusorial earth, the wherein ratio of polyacrylamide and modification infusorial earth are 1:1.A kind of flocculation dewatering agent that the present invention is obtained, the advantage compared with other flocculation dewatering agent：Dosage is few；Sludge dewatering effect is good, moisture percentage in sewage sludge can be made to be down to less than 60%；Sludge structure can effectively be changed, the part irreducible water in sludge is removed, effectively improve dewatering efficiency.Accelerate sludge of sewage treatment plant processing speed simultaneously, the sludge that can discharge sedimentation basin directly carries out flocculation dewatering modulation, so as to cross sludge in sludge-tank concentrating, assimilating process, greatly shortens the Treatment of Sludge time.
Description
Technical field
The present invention relates to a kind of dehydrating agent, particularly a kind of flocculation dewatering agent and preparation method thereof.
Background technology
With the quickening of China's Development of China's Urbanization, municipal sewage is largely discharged, therefore urban wastewater treatment firm is also largely built
And if coming into operation.Urban wastewater treatment firm can produce substantial amounts of excess sludge in the process of running, and excess sludge is disposed
It is the problem during municipal sewage treatment all the time.At present, according to statistics, the total sludge row of wastewater treatment in China factory
High-volume in 1.38-2.30 × 108Ton/year.Such substantial amounts of sludge will cause huge if it can not properly dispose to environment
Influence.Can sludge reach that whether the standard directly filled is primarily to see the moisture content of sludge less than 60%.Current sewage treatment plant
The moisture content for the sludge that mechanism filter-pressing is produced is 80% or so.Because moisture content is very high, to subsequent treatment bring it is a variety of it is unfavorable because
Element, such as subsequent processing device are invested and operating cost is very high, easily produce the environmental sanitation problems such as foul smell, mosquito.Make a general survey of whole
Sludge disposal technology service market, the sludge of moisture content 80% is either dried, compost, burning, or its various group technology,
Its equipment investment and operating cost are all sufficiently expensive.In environmental requirement increasingly strict today, sludge carry out advanced treating into
For certainty.
Current sludge deep treatment technology has sludge drying dehydration technique and sludge modulation technique.Sludge drying dehydration technique
It is divided into sludge again and dries desiccation, heat drying, microwave desiccation, four kinds of sludge lime drying and other treatment.Sludge is dried needed for desiccation method
Site area it is very big, dry efficiency is relatively low, while also having foul gas is emitted into surrounding environment, environment is caused
Secondary pollution.Site area needed for heat drying method and microwave desiccation method is larger, and equipment investment expense and operating cost are very high,
The scope of application is very narrow.The higher sludge drying technique of lime desiccation method cost performance, but dosage is very big, reduces sludge water content
The quality of dewatered sludge is considerably increased simultaneously.The increase of dewatered sludge quality improves transport and landfill expense, therefore the comprehensive regulation
Expense is also higher.
Sludge modulation technique is directed to add flocculation dewatering agent in water-containing sludge, with destroy the constraint water-bound in sludge and
Microbe composition structure, reaches stabilized sludge, reduces the purpose of moisture content.Sludge modulation technique is most effective at present, and improvement takes
With relatively low sludge disposal technology.The core of the technology is flocculation dewatering agent.The flocculation dewatering agent used at present mainly has inorganic
Coagulation dehydrating agent, organic-flocculation dehydrating agent, microorganism dehydrating agent three major types.It is dehydrated using molysite, aluminium salt as the inorganic coagulation of representative
Consumption is big in use for agent, with certain toxicity and corrosivity；Microbiology class flocculation dewatering agent has free of contamination
Advantage, but its action principle is still undetermined so far, and prepare that cost is high, specific aim is not strong, exists very big blind during use
Mesh.Therefore, organic-flocculation dehydrating agent is still the main flow studied at present.
In sludge dewatering, conventional organic-flocculation dehydrating agent has two kinds of synthesis type and natural polymer subtype, and synthesis type has
The agent of machine flocculation dewatering is best with the dehydrating effect of cationic, such as：PDDA (PDMDAAC) is a kind of
There is positive charge density height, good water solubility, relative molecular mass to be easy to for water-soluble cationic polymer, its homopolymer or copolymer
Control, high effect nontoxic, it is cheap the advantages of.The organic polymer coargulator of synthesis such as polyacrylamide, polyacrylic acid etc. have
Have the advantages that consumption is few, flocculation rate is fast, but the residual monomer of this kind of high polymer has toxicity, can teratogenesis, carcinogenic, mutagenesis,
Thus it is restricted its application.And natural polymer flocculation dewatering agent has the advantages that nontoxic, non-secondary pollution, but wadding
Relatively low, DeGrain during exclusive use of solidifying activity.
The content of the invention
One kind is provided and has high flocculation dewatering effect concurrently the invention aims to solve above-mentioned the deficiencies in the prior art
Economic and environment-friendly a kind of flocculation dewatering agent and preparation method thereof again.
To achieve these goals, a kind of flocculation dewatering agent designed by the present invention, the weight proportion of each component is：Starch
10-15 parts of acrylamide grafted copolymer, 1-5 parts of aluminium chloride, 1-5 parts of polyacrylamide, 1-5 parts of modification infusorial earth, wherein poly-
The ratio of acrylamide and modification infusorial earth is 1:1.
Each component weight proportion in the modification infusorial earth is 60 parts of diatomite, 15 parts of pomelo peel, 5 parts of activated carbon, stone
Black 10 parts of alkene, 2 parts of poly-ferric chloride, 3 parts of cerous nitrate, 5 parts of oxalic acid.
The polyacrylamide is PAMC, and its molecular weight is 10,000,000.
A kind of preparation method of above-mentioned flocculation dewatering agent, comprises the following steps：
Step 1, pomelo peel is cleaned with distilled water, dries 2h after chopping at 105 DEG C, ground after taking-up, taken after crossing 100 mesh sieves
15 parts are put into beaker, add 5 parts of activated carbon, it is well mixed after be put into the 2- well prepared in advance being made up of 5 parts of oxalic acid
In 3mol/L oxalic acid solution, 60 parts of diatomite, 10 parts of graphene, 2 parts of poly-ferric chloride, 3 parts of cerous nitrate are then sequentially placed into,
By stirring mixing, after the normal-temperature reaction of 24 hours, deliver in baking oven, take out cooling after being dried in 105 DEG C, be ground to
100 mesh, it is standby to make to obtain modification infusorial earth；
Step 2, it is 10-15 parts of potato starch acrylamnide graft copolymer is soluble in water, after being uniformly mixed, mixed
Thing A is standby to make；
Step 3, it is 1-5 parts of aluminium chloride, 1-5 parts of polyacrylamide is soluble in water, mixed by mixing apparatus, at normal temperatures and pressures
By 100 turns per minute, through 10 ~ 20 minutes be thoroughly mixed, mixture B is obtained standby to make；
Step 4, after mixture A is mixed with mixture B, then 1-5 parts of modification infusorial earth is put into, at normal temperatures and pressures, by every point
The speed that 100 turns of clock is carried out after the mixing of 30 ~ 60 minutes, and natural air drying is the flocculation dewatering agent for obtaining the present invention.
Wherein potato starch acrylamnide graft copolymer is a kind of high molecular polymer, with nontoxic, fully biodegradable
The features such as, amide groups on the polymer can, absorption affine with many materials, form hydrogen bond and the shape between adsorbed ion
Floc sedimentation is generated into " bridging ", therefore shows stronger flocculating property.Polyacrylamide equally have good flocculability, with aluminium
During Ar ion mixing, its flocculation ability can be strengthened, increase the cohesiveness of adsorbed material to a certain extent.Potato starch acrylamnide connects
Graft copolymer-aluminium-polyacrylamide three can promote mutually, improve flocculation ability.
Other diatomite is a kind of siliceous organism sedimentary rock, and main chemical is SiO2, and contain a small amount of Al2O3,
P2O5, CaO, MgO etc., it is made up of the wall shell of diatom, has multistage, a large amount of, micropore of ordered arrangement on wall shell, surface has largely
Carboxyl is covered, thus aobvious faintly acid, is referred to as solid acid in catalytic field.Diatomite light weight, porous, relative density are small, aperture
Distribution is big, and porosity is high, and high adsorption capacity can adsorb 1.5~4 times of impurity of own wt.Therefore, by diatomite
Unique microcellular structure, waste water is handled using its absorption property can not only reduce cost, but also can more effective land productivity
With the mineral resources of China's abundant.And in this patent, diatomite is modified using graphene and poly-ferric chloride so that change
Diatomite after property is greatly improved for the clearance of organic matter.When graphene and poly-ferric chloride are distributed in diatomaceous surface
When, there is stronger cohesiveness to the organic matter in sewage so that more organic matters are attracted in microcellular structure.While nitre
The addition of sour cerium then improves facilitation, improves the activity of graphene and poly-ferric chloride.The shaddock peel powder that it is possible to additionally incorporate
End, is also the material with stronger adsorption capacity, and both diatomite and pomelo peel powder cooperate, had to organic removal rate
Bigger enhancement effect, and the toxic heavy metal ion that pomelo peel powder can be in absorption effluent.Wherein activated carbon has
There are certain deodorizing capability and adsorption capacity, to having certain improvement result on the smell of sanitary sewage and sludge.
A kind of flocculation dewatering agent that the present invention is obtained, its stability is high, the characteristics of lacking with efficient, cleaning, consumption, can
The organic pollution and suspension effectively gone in water removal, so as to lift water treatment capacity, improves the quality of processing water.Specifically and its
The advantage that his flocculation dewatering agent is compared：Dosage is few；Sludge dewatering effect is good, moisture percentage in sewage sludge can be made to be down to less than 60%；Can have
Effect changes sludge structure, removes the part irreducible water in sludge, effectively improves dewatering efficiency.Accelerate sludge of sewage treatment plant simultaneously
Processing speed, the sludge that can discharge sedimentation basin directly carries out flocculation dewatering modulation, disappears so as to cross sludge in sludge-tank concentration
Change process, greatly shortens the Treatment of Sludge time.
Embodiment
With reference to embodiment, the present invention is further described.
Embodiment 1：
A kind of flocculation dewatering agent that the present embodiment is provided, the weight proportion of each component is：Potato starch acrylamnide graft copolymer 10
Part, 1 part of aluminium chloride, 2 parts of polyacrylamide, 2 parts of modification infusorial earth.
Each component weight proportion in the modification infusorial earth is 60 parts of diatomite, 15 parts of pomelo peel, 5 parts of activated carbon, stone
Black 10 parts of alkene, 2 parts of poly-ferric chloride, 3 parts of cerous nitrate, 5 parts of oxalic acid.
A kind of preparation method of above-mentioned flocculation dewatering agent, comprises the following steps：
Step 1, pomelo peel is cleaned with distilled water, dries 2h after chopping at 105 DEG C, ground after taking-up, taken after crossing 100 mesh sieves
15 parts are put into beaker, add 5 parts of activated carbon, it is well mixed after be put into the 2- well prepared in advance being made up of 5 parts of oxalic acid
In 3mol/L oxalic acid solution, 60 parts of diatomite, 10 parts of graphene, 2 parts of poly-ferric chloride, 3 parts of cerous nitrate are then sequentially placed into,
By stirring mixing, after the normal-temperature reaction of 24 hours, deliver in baking oven, take out cooling after being dried in 105 DEG C, be ground to
100 mesh, it is standby to make to obtain modification infusorial earth；
Step 2, it is 10 parts of potato starch acrylamnide graft copolymer is soluble in water, after being uniformly mixed, obtain mixture A
It is standby to make；
Step 3, it is 1 part of aluminium chloride, 2 parts of polyacrylamide is soluble in water, mixed by mixing apparatus, at normal temperatures and pressures by every
100 turns of minute, through 10 ~ 20 minutes be thoroughly mixed, obtain mixture B standby to make；
Step 4, after mixture A is mixed with mixture B, then 2 parts of modification infusorial earth is put into, at normal temperatures and pressures, by per minute
100 turns of speed is carried out after the mixing of 30 ~ 60 minutes, and natural air drying is the flocculation dewatering agent for obtaining the present invention.
The residual active sludge for finally taking certain secondary sedimentation tank of sewage treatment work to discharge, moisture content 92-98%.Then this implementation is taken
Obtained flocculation dewatering agent carries out flocculation dewatering in example, and dosage is 7.0mg/L, and the moisture content of sludge is after press filtration after processing
58.7%, reach that the sludge of national regulation directly fills requirement.
The purity of the potato starch acrylamnide graft copolymer wherein used in the present invention is 99.87%, and it is by starch and propylene
Acid amides produces free radical using redox initiation system, and further generation chain triggers, chain increases, three primitives of chain termination are anti-
Should.This is a complicated heterogeneous system, and water soluble starter decomposes in aqueous phase and produces free radical and monomer solution, You Jirong
Inverse suspension polymerization occurs for agent, dispersant formation water-in-oil type suspension and starch.Polymerisation is by the water of dispersant
Carried out in phase droplet.Specific preparation process is as follows：
Oil phase is prepared：3g Arlacel-60s are added in 60ml hexamethylenes, and continuously stirred, make Arlacel-60 be completely dissolved, it is stand-by.
Aqueous phase is prepared：By ammonium ceric nitrate（CAN）And potassium peroxydisulfate（KPS）With 1:2（Mol ratio）It is mixed to prepare compound initiation
Agent；Take 0.3g composite initiators to be together added in 50mL deionized waters with 10g starch, be continuously stirring to and be completely dissolved, it is stand-by.
Acrylamide monomer solution is prepared：Take 5g acrylamides（AM）, it is added in 50mL deionized waters, continuously stirs
It is stand-by to being completely dissolved.
Potato starch acrylamnide graft copolymer（FSM）It is prepared by head product：Agitator, condensing reflux pipe and dropping liquid will be installed
The 250ml four-hole bottles of funnel are placed in water bath with thermostatic control, add oil phase and aqueous phase, and heating stirring is carried out under nitrogen protection.Work as temperature
Degree is added when reaching 70 DEG C into four-hole bottle to be continued to stir 2.5h after acrylamide monomer solution, completion of dropping, and reaction is completed.Drop
To room temperature, liquid phase is poured out, you can obtain gluey head product.
Extract blend：Head product is washed into precipitation with acetone, is then washed for several times with ethanol, that is, obtains graft copolymer
With the blend of non-grafted starch.
Remove homopolymer：By blend as in Soxhlet extractor, using volume ratio as 3：2 ethylene glycol and glacial acetic acid mixing
Liquid extracts for extract, removes homopolymer, then is washed, filtered with absolute ethyl alcohol, is dried under vacuum to constant weight, obtains crude product.
Crude product is purified：Used after a certain amount of 0.5mol/L NaOH or KOH solution, stirring 0.5-1h are added into crude product
Filtered on buchner funnel, takes remaining solid drying, crushes, as pure product potato starch acrylamnide graft copolymer（FSM）.
Embodiment 2：
A kind of flocculation dewatering agent that the present embodiment is provided and preparation method thereof is substantially same as Example 1, and its main distinction point exists
In the weight proportion of each component is in the present embodiment：15 parts of potato starch acrylamnide graft copolymer, 5 parts of aluminium chloride, polyacrylamide
4 parts of amine, 4 parts of modification infusorial earth.
The residual active sludge for taking certain secondary sedimentation tank of sewage treatment work to discharge, moisture content 92-98%.Then take in the present embodiment
Obtained flocculation dewatering agent carries out flocculation dewatering, and dosage is 8.0mg/L, and the moisture content of sludge is after press filtration after processing
55.6%, reach that the sludge of national regulation directly fills requirement.
Embodiment 3：
A kind of flocculation dewatering agent that the present embodiment is provided and preparation method thereof is substantially same as Example 1, and its main distinction point exists
In the weight proportion of each component is in the present embodiment：12 parts of potato starch acrylamnide graft copolymer, 4 parts of aluminium chloride, polyacrylamide
5 parts of amine, 5 parts of modification infusorial earth.
The residual active sludge for taking certain secondary sedimentation tank of sewage treatment work to discharge, moisture content 92-98%.Then take in the present embodiment
Obtained flocculation dewatering agent carries out flocculation dewatering, and dosage is 6.5mg/L, and the moisture content of sludge is after press filtration after processing
53.5%, reach that the sludge of national regulation directly fills requirement.
Claims (4)
1. a kind of flocculation dewatering agent, it is characterized in that the weight proportion of each component is：Potato starch acrylamnide graft copolymer 10-15
Part, 1-5 parts of aluminium chloride, 1-5 parts of polyacrylamide, the ratio of 1-5 parts of modification infusorial earth, wherein polyacrylamide and modification infusorial earth
Example is 1:1.
2. a kind of flocculation dewatering agent according to claim 1, it is characterized in that each component weight in the modification infusorial earth
Match as 60 parts of diatomite, 15 parts of pomelo peel, 5 parts of activated carbon, 10 parts of graphene, 2 parts of poly-ferric chloride, 3 parts of cerous nitrate, oxalic acid
5 parts.
3. a kind of flocculation dewatering agent according to claim 1, it is characterized in that the polyacrylamide is cation polypropylene
Acid amides, its molecular weight is 10,000,000.
4. a kind of preparation method of flocculation dewatering agent as claimed in claim 1, it is characterized in that comprising the following steps：
Step 1, pomelo peel is cleaned with distilled water, dries 2h after chopping at 105 DEG C, ground after taking-up, taken after crossing 100 mesh sieves
15 parts are put into beaker, add 5 parts of activated carbon, it is well mixed after be put into the 2- well prepared in advance being made up of 5 parts of oxalic acid
In 3mol/L oxalic acid solution, 60 parts of diatomite, 10 parts of graphene, 2 parts of poly-ferric chloride, 3 parts of cerous nitrate are then sequentially placed into,
By stirring mixing, after the normal-temperature reaction of 24 hours, deliver in baking oven, take out cooling after being dried in 105 DEG C, be ground to
100 mesh, it is standby to make to obtain modification infusorial earth；
Step 2, it is 10-15 parts of potato starch acrylamnide graft copolymer is soluble in water, after being uniformly mixed, mixed
Thing A is standby to make；
Step 3, it is 1-5 parts of aluminium chloride, 1-5 parts of polyacrylamide is soluble in water, mixed by mixing apparatus, at normal temperatures and pressures
By 100 turns per minute, through 10 ~ 20 minutes be thoroughly mixed, mixture B is obtained standby to make；
Step 4, after mixture A is mixed with mixture B, then 1-5 parts of modification infusorial earth is put into, at normal temperatures and pressures, by every point
The speed that 100 turns of clock is carried out after the mixing of 30 ~ 60 minutes, and natural air drying is the flocculation dewatering agent for obtaining the present invention.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107285446A (en) * | 2017-08-28 | 2017-10-24 | 湖南奇思环保有限公司 | A kind of flocculant and its synthetic method and application |
| CN107417060A (en) * | 2017-08-28 | 2017-12-01 | 湖南奇思环保有限公司 | A kind of curing agent and its synthetic method and application |
| CN107986417A (en) * | 2017-12-28 | 2018-05-04 | 安徽宏实光机电高科有限公司 | A kind of preparation method of Sewage sepiolite/starch grafted polyacrylamide composite flocculation agent |
| CN108408859A (en) * | 2018-05-03 | 2018-08-17 | 合肥宸翊商贸有限公司 | A kind of composite flocculation agent promoting tailing flocculating setting |
| WO2020186620A1 (en) * | 2019-03-15 | 2020-09-24 | 招远市汇潮新能源科技有限公司 | Drying treatment method and system |
| CN112979141A (en) * | 2021-02-18 | 2021-06-18 | 杭州楠大环保科技有限公司 | Modified activated sludge and application thereof |
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| CN101746907A (en) * | 2008-12-01 | 2010-06-23 | 中国石油化工股份有限公司 | Silicon-containing wastewater treatment method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107285446A (en) * | 2017-08-28 | 2017-10-24 | 湖南奇思环保有限公司 | A kind of flocculant and its synthetic method and application |
| CN107417060A (en) * | 2017-08-28 | 2017-12-01 | 湖南奇思环保有限公司 | A kind of curing agent and its synthetic method and application |
| CN107986417A (en) * | 2017-12-28 | 2018-05-04 | 安徽宏实光机电高科有限公司 | A kind of preparation method of Sewage sepiolite/starch grafted polyacrylamide composite flocculation agent |
| CN108408859A (en) * | 2018-05-03 | 2018-08-17 | 合肥宸翊商贸有限公司 | A kind of composite flocculation agent promoting tailing flocculating setting |
| WO2020186620A1 (en) * | 2019-03-15 | 2020-09-24 | 招远市汇潮新能源科技有限公司 | Drying treatment method and system |
| CN112979141A (en) * | 2021-02-18 | 2021-06-18 | 杭州楠大环保科技有限公司 | Modified activated sludge and application thereof |
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Application publication date: 20170728 |