CN108545816A - A kind of dense media/alkali coupling broken wall formula flocculant and its preparation method and application - Google Patents

A kind of dense media/alkali coupling broken wall formula flocculant and its preparation method and application Download PDF

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Publication number
CN108545816A
CN108545816A CN201810448349.XA CN201810448349A CN108545816A CN 108545816 A CN108545816 A CN 108545816A CN 201810448349 A CN201810448349 A CN 201810448349A CN 108545816 A CN108545816 A CN 108545816A
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CN
China
Prior art keywords
alkali
dense media
flocculant
broken wall
wall formula
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Pending
Application number
CN201810448349.XA
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Chinese (zh)
Inventor
李登新
郭启浩
马颖潇
郭庆峰
袁晓玲
王雅萌
刘二燕
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Donghua University
National Dong Hwa University
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Donghua University
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Priority to CN201810448349.XA priority Critical patent/CN108545816A/en
Publication of CN108545816A publication Critical patent/CN108545816A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5263Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material

Abstract

The present invention relates to a kind of dense media/alkali to couple broken wall formula flocculant and its preparation method and application, and flocculant includes porous dense media and alkali;Preparation method includes:Dense media is crushed, filter, stirred together with alkali to get;Flocculant is applied to sewage disposal.The present invention destroys the structure of the cell wall of microorganism or change cell in sludge by alkali and improves dehydration efficiency;It compresses sludge cake moisture content and is less than 60%;The nitrogenous liquid of height that broken wall generates can be used as the raw material of plant nutrition liquid or soil conditioner;Impurity in sludge is attached to surface and the pore interior of dense media, and in sedimentation, since the density of dense media is more than the density of sewage, impurity settles together with dense media, and sludge settlement rate is fast.

Description

A kind of dense media/alkali coupling broken wall formula flocculant and its preparation method and application
Technical field
The invention belongs to flocculant and its preparation method and application field, more particularly to a kind of dense media/alkali couples broken wall Formula flocculant and its preparation method and application.
Background technology
Organic flocculant performance is stablized, and flocculating effect is good, but expensive, and the residual monomer of this kind of high polymer has " three cause " effect (causing rugged, carcinogenic, mutagenesis);Traditional inorganic flocculating agent stability is poor, and flocculating effect is general, but price is just Preferably, demand is high;But the sludge that inorganic flocculating agent flocculates passes through press filtration, it is necessary to by means of additives such as lime Or sludge cake moisture content could be reduced to 60% by lime with high pressure, but the non-combustible part of dewatered sludge increases by 25~50%, even Taller, burning flying dust and lime-ash are significantly increased, and reduce sludge ultimate disposal effect, improve processing cost, this technology is caused to lack Caused by sunken reason is existing flocculant design principle.
Existing flocculant theoretical foundation is:" coalescence " is theoretical.Flocculant mainly carries positive (negative) electrical group and water In it is close to each other with negative (just) electrical some particles for being difficult to detach or particle, reduce its potential, be at shakiness Determine state, using its coalescence property agglomeration, and is separated by physics or chemical method.It generates with this method For sludge aqueous up to 80% after press filtration, this brings very big influence to follow-up sludge treatment technique.
Invention content
Technical problem to be solved by the invention is to provide a kind of dense media/alkali coupling broken wall formula flocculant and its preparation sides Method and application, the flocculant have coalescence ability, and have and abolish microorganism wall or the cyto-architectural function of change, Substantially reduce filter press cake moisture content.
A kind of dense media of the present invention/alkali couples broken wall formula flocculant, and the flocculant includes porous dense media and alkali, alkali Account for the 50%-95% of porous dense media and alkali gross mass.
The alkali is attached to the pore surface of porous dense media.
The dense media is one or more in flyash, sand, biogum.
The dense media grain size is 60~300 mesh.
The alkali is sodium hydroxide, potassium hydroxide or calcium hydroxide.
A kind of preparation method of dense media of the present invention/alkali coupling broken wall formula flocculant, including:
Dense media is crushed, filters, filtered dense media is poured into together with ground caustic end in blender and is stirred, obtains weight Medium/alkali couples broken wall formula flocculant.
The crushing is carried out in pulverizer;Filtering is to use sieve.
The rotating speed of the pulverizer is 1000~3000r/min;Sieve mesh number is 60~300 mesh.
The mixing speed is 500~1000r/min.
A kind of dense media of the present invention/alkali coupling broken wall formula flocculant is applied to sewage disposal, the specific steps are:
Dense media/alkali coupling broken wall formula flocculant is put by 2%~5% mass concentration in sewage, according to sewage feelings Condition is stirred to react 4~8 hours, is precipitated 30~60 minutes.
A kind of dense media of the present invention/alkali couples broken wall formula flocculant during treated sewage, the alkali soluble in flocculant In water, the effect of alkali is exactly to dissolve cell wall while inhibiting cell activity, it is organic to release intracellular macromolecular to solution Substance and moisture;Dense media in flocculant can adsorb pollutant, in infall process, the pollutant that is attached on dense media It is settled together with dense media, accelerated sedimentation process.
Advantageous effect
(1) present invention destroys the structure of the cell wall of microorganism or change cell in sludge by alkali and improves dehydration effect Rate;It compresses sludge cake moisture content and is less than 60%.The nitrogenous liquid of height that broken wall generates can be used as plant nutrition liquid or soil conditioner Raw material.Impurity in sludge is attached to surface and the pore interior of dense media, in sedimentation, since the density of dense media is more than The density of sewage, impurity settle together with dense media, and sludge settlement rate is fast.
(2) the present invention is directed to overcome existing inorganic matter flocculant disadvantage, be fully solved sludge flocculation dehydration and it is final efficiently Pollution-free problem of complex utilization.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, people in the art Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited Range.
Embodiment 1
Biogum (grain size is 300 mesh) is smashed by pulverizer under 3000r/min rotating speeds, by the sieve of 200 mesh Filtering, obtains biogum powder, weighs 50g biogums powder and 50g sodium hydroxides respectively, pour into blender, in 600r/ It is stirred evenly under min rotating speeds, obtains dense media/alkali coupling broken wall formula flocculant.Dehydration efficiency can be improved in this broken wall formula flocculant, Sewage disposal for Shanghai Songjiang sewage treatment plant, sewage disposal the specific steps are:By broken wall formula flocculant by 5% Mass concentration is put into sewage, is stirred to react 4 hours according to sewage situation, is precipitated 30 minutes.Sludge cake is compressed after sewage disposal Moisture content is less than 55%, and the sedimentation time shortens 20%.
Embodiment 2
Flyash (grain size is 300 mesh) is smashed by pulverizer under 1000r/min rotating speeds, by the sieve mistake of 60 mesh Filter, obtains flyash powder, weighs 10g flyash powders and 100g calcium hydroxides respectively, pour into blender, in 600r/min It is stirred evenly under rotating speed, obtains dense media/alkali coupling broken wall formula flocculant.Dehydration efficiency can be improved in this broken wall formula flocculant, right In the sewage disposal of Shanghai Songjiang sewage treatment plant, sewage disposal the specific steps are:Broken wall formula flocculant is pressed to 2% quality Concentration is put into sewage, is stirred to react 8 hours according to sewage situation, is precipitated 30 minutes.It is aqueous that sludge cake is compressed after sewage disposal Rate is less than 60%, and the sedimentation time shortens 20%.
Embodiment 3
Flyash (grain size is 300 mesh) is smashed by pulverizer under 1000r/min rotating speeds, by the sieve of 100 mesh Filtering, obtains flyash powder, weighs 100g flyash powders and 100g potassium hydroxide respectively, pour into blender, in 600r/ It is stirred evenly under min rotating speeds, obtains dense media/alkali coupling broken wall formula flocculant.Dehydration efficiency can be improved in this broken wall formula flocculant, Sewage disposal for Shanghai Songjiang sewage treatment plant, sewage disposal the specific steps are:Broken wall formula flocculant is pressed to 3% matter It measures in concentration input sewage, is stirred to react 6 hours, is precipitated 60 minutes according to sewage situation.Sludge cake is compressed after sewage disposal to contain Water rate is less than 60%, and the sedimentation time shortens 30%.
The above, only presently preferred embodiments of the present invention, not to the present invention in any form with substantial limitation, It should be pointed out that for those skilled in the art, under the premise of not departing from the method for the present invention, can also make Several improvement and supplement, these are improved and supplement also should be regarded as protection scope of the present invention.All those skilled in the art, Without departing from the spirit and scope of the present invention, when made using disclosed above technology contents it is a little more Dynamic, modification and the equivalent variations developed, are the equivalent embodiment of the present invention;Meanwhile all substantial technologicals pair according to the present invention The variation, modification and evolution of any equivalent variations made by above-described embodiment, still fall within the range of technical scheme of the present invention It is interior.

Claims (10)

1. a kind of dense media/alkali couples broken wall formula flocculant, which is characterized in that the flocculant includes porous dense media and alkali, Alkali accounts for the 50%-95% of porous dense media and alkali gross mass.
2. a kind of dense media described in accordance with the claim 1/alkali couples broken wall formula flocculant, which is characterized in that the alkali attachment In the pore surface of porous dense media.
3. a kind of dense media described in accordance with the claim 1/alkali couples broken wall formula flocculant, which is characterized in that the dense media It is one or more in flyash, sand, biogum.
4. coupling broken wall formula flocculant according to a kind of dense media described in claim 1 or 3/alkali, which is characterized in that the dense medium Plasmid diameter is 60~300 mesh.
5. a kind of dense media described in accordance with the claim 1/alkali couples broken wall formula flocculant, which is characterized in that the alkali is hydrogen Sodium oxide molybdena, potassium hydroxide or calcium hydroxide.
6. a kind of preparation method of dense media as described in claim 1/alkali coupling broken wall formula flocculant, including:
Dense media is crushed, filters, filtered dense media is stirred together with alkali, obtains dense media/alkali coupling broken wall formula wadding Solidifying agent.
7. the preparation method of dense media/alkali coupling broken wall formula flocculant according to claim 6, which is characterized in that described Crushing is carried out in pulverizer;Filtering is to use sieve.
8. the preparation method of dense media/alkali coupling broken wall formula flocculant according to claim 7, which is characterized in that described The rotating speed of pulverizer is 1000~3000r/min;Sieve mesh number is 60~300 mesh.
9. the preparation method of dense media/alkali coupling broken wall formula flocculant according to claim 6, which is characterized in that described Mixing speed is 500~1000r/min.
10. a kind of application of dense media as described in claim 1/alkali coupling broken wall formula flocculant, which is characterized in that be applied to Sewage disposal, the specific steps are:Dense media/alkali coupling broken wall formula flocculant is put into sewage by 2%~5% mass concentration In, it is stirred to react 4~8 hours, precipitates 30~60 minutes.
CN201810448349.XA 2018-05-11 2018-05-11 A kind of dense media/alkali coupling broken wall formula flocculant and its preparation method and application Pending CN108545816A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030189008A1 (en) * 2002-04-05 2003-10-09 Hickey Roger A. Process for treating liquid septage and biosolids
CN102173556A (en) * 2011-01-20 2011-09-07 北京城市排水集团有限责任公司 Device and method for cell wall breaking in municipal sludge dewatering process
CN107686225A (en) * 2017-09-05 2018-02-13 神美科技有限公司 A kind of compound type sludge conditioner for sludge dewatering

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030189008A1 (en) * 2002-04-05 2003-10-09 Hickey Roger A. Process for treating liquid septage and biosolids
CN102173556A (en) * 2011-01-20 2011-09-07 北京城市排水集团有限责任公司 Device and method for cell wall breaking in municipal sludge dewatering process
CN107686225A (en) * 2017-09-05 2018-02-13 神美科技有限公司 A kind of compound type sludge conditioner for sludge dewatering

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Application publication date: 20180918

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