CN104973751B - A kind of additive for sludge dewatering and mud dewatering method - Google Patents
A kind of additive for sludge dewatering and mud dewatering method Download PDFInfo
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- CN104973751B CN104973751B CN201510478324.0A CN201510478324A CN104973751B CN 104973751 B CN104973751 B CN 104973751B CN 201510478324 A CN201510478324 A CN 201510478324A CN 104973751 B CN104973751 B CN 104973751B
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Abstract
The invention provides a kind of additive in order to sludge dewatering.This additive using antibiotic medicinal residues ash as sludge dewatering additive, not only solve the problems, such as that pollution and the process cost of disposal of hazardous waste antibiotic medicinal residues are high, but also expanded the purposes of antibiotic medicinal residues ash, antibiotic medicinal residues ash is as a kind of green resource of safety non-pollution, being added in mud will not be to environmental danger, reach the treatment of wastes with processes of wastes against one another, the effect of twice laid.Simultaneously as the unique property of antibiotic medicinal residues ash, use it for can also being conducive to sludge dewatering during sludge dewatering.The present invention also provides a kind of application additive provided by the present invention to carry out mud dewatering method, and the method can make additive fully mix with mud, is conducive to the dehydration of mud.
Description
Technical field
The present invention relates to field of sludge treatment, take off in particular to a kind of additive for sludge dewatering and mud
Water method.
Background technology
Municipal sludge leads to Treatment of Sludge difficult because yield is big, mud component is complicated, moisture content is high.And in mud
In process step, sludge dewatering becomes the committed step of Treatment of Sludge.Good mud dewatering method can reduce processing cost, right
Follow-up mud continues with unaffected.
Moisture in mud is divided into four kinds by its existence：1) Interstitial Water, Interstitial Water is the trip that mud granule surrounds
From moisture, typically constitute from the 70% about of mud total moisture content；2) capillary water, capillary water is between mud granule or in particulate fractures
The moisture being combined together due to capillarity and mud granule, accounts for the 20% about of total Water；3) adsorb water, absorption water be by
In the moisture on mud granule surface for the capillary effect absorption, because mud granule is little, there are extremely strong superficial attractive forces；
4) combine water, be included in the moisture in microbial cell body in mud in conjunction with water, only change the internal structure of mud granule
Could separate in conjunction with water；Account for 10% about of total moisture content in mud in conjunction with water together with absorption water.
Interstitial Water easily removes in theory, but because mud is to be formed by cotton-shaped colloid set, granule very thin and
Very soft.When an external force is applied, gluey subparticle will block formation filter bridge, increases the ratio resistance of filtration；And due to
Soft granule has certain compressibility, and when external force increases, it is very little that granule can form one layer of hole in filter media surface
" film ", so that water is difficult to pass through, dehydration also just seems abnormal difficult.
Existing sludge dewatering treatment need to add high polymer polyacrylamide 0.5-1% (mud dry weight) to concentrate as flocculant
Carry out subsequent treatment after dehydration.The every annual meeting of China uses substantial amounts of polyacrylamide (PAM), and polyacrylamide is also to ring simultaneously
The material that border is harmful to, also has extremely strong intoxicating to act on biology, so remaining in the PAM in mud can affect the final soil of mud
Cost and effect that ground utilizes.
Antibiotic medicinal residues are the filtering residues after fermentation produces antibiotic.Noxious substance may be remained due in antibiotic medicinal residues
Or drug resistance pathogen, therefore antibiotic medicinal residues are a kind of hazardous wastes, country expressly provides and must deliver to the useless place of local danger
Reason center burning disposal.The antibiotic medicinal residues ash obtaining after burning is a kind of nutrient substance resource, rich in N, P, K, organic matter.
But it is used merely to do landfill disposal in the useless processing center of danger, cause the significant wastage of resource.
In view of this, the special proposition present invention.
Content of the invention
The first object of the present invention is to provide a kind of additive for sludge dewatering.In the present invention, by antibiotic
Medicinal residues ash, as the additive of sludge dewatering, has not only expanded the purposes of antibiotic medicinal residues ash, and, the ash conduct of antibiotic medicinal residues
A kind of green resource of safety non-pollution, being added in mud will not be to environmental danger.Simultaneously as antibiotic medicinal residues are grey
Unique property, uses it for can also being conducive to sludge dewatering during sludge dewatering.
The second object of the present invention is to provide a kind of application additive provided by the present invention to carry out mud dewatering method,
The method can make additive fully mix with mud, is conducive to the dehydration of mud.
In order to realize the above-mentioned purpose of the present invention, spy employs the following technical solutions：
A kind of additive for sludge dewatering, described additive includes antibiolicss slag ash；Calculated with percentage composition, institute
State in antibiotic medicinal residues ash, the content of N is 2.5%-5%, the content of P is 9%-15%, the content of K is 1%-5%, organic
Content be 15%-25%.
Because the mud after dehydration is as land resource, usually it is secondary use, for example, prepares agricultural fertilizer, health
Landfill and production construction material etc..Therefore, the safety of the mud after dehydration is most important.In the present invention, by safety non-pollution
Antibiotic medicinal residues ash as sludge dewatering treatment additive, will not to environment produce pollution-free.And, due to antibiolicss
Slag ash is enriched in the green resource of the nutritional labelings such as N, P, K, organic matter, and in this mud after making to process, nutritional labeling increases,
Secondary value greatly improves.
Adopt antibiotic medicinal residues ash as the additive of sludge dewatering in the present invention, not only expand antibiotic medicinal residues ash
Purposes, and sludge dewatering can also be conducive to.Because antibiotic medicinal residues ash is the granule of relative rigid and surface imperfection, when
The grain structure of mud when mixing with mud, can be changed, increase permeability and the aperture rate of mud.When being dehydrated
When, it is possible to reduce resistance, make water be easy to pass through, thus being conducive to the dehydration of mud.
Secondly as antibiotic medicinal residues ash is the material of meta-alkalescence, rich in elements such as K, P, N, and pH is more than 10.When with dirt
During mud mixing, be conducive to the dissociation dissolving of the outer polymer of mud, beneficial to the release of water.
When antibiotic medicinal residues ash is added to and is dehydrated in mud, antibiotic medicinal residues ash supply mud is with cellular grid
Skeleton, changes mud granule structure, increases permeability and the aperture rate of mud.Preferably, the granularity of described antibiotic medicinal residues ash
For 0.3-6mm.It is further preferred that in described antibiotic medicinal residues ash, granularity is that the component of 0.3-0.9mm accounts for 10%-15%, grain
Spend the component for 1-3mm and account for 30%-40%, granularity is that the component of 4-6mm accounts for 50%-60%.
Preferably, also include polyacrylamide in described additive.Using antibiotic medicinal residues ash joint polyacrylamide altogether
Carry out processed with to mud, not only can reduce the usage amount of high polymer polyacrylamide, and can make full use of useless
Thing medicinal residues ash.And, when antibiotic medicinal residues ash and polyacrylamide collective effect, it is added to when carrying out processed in mud,
The dewatering that municipal sludge can also be conducive to improves, and significantly improves sludge dewatering effect.Preferably, described polyacrylamide
Quality is the 3%-5% of described antibiotic medicinal residues grey matter amount.It is further preferred that described polyacrylamide is cation polypropylene
Amide.
The species of antibiotic is more, and in the present invention, antibiotic medicinal residues ash used is preferably lincomycin medicinal residues ash, penicillin medicine
One or more of slag ash, streptomycin medicinal residues ash, tetracycline medicinal residues ash.Component preferably in this several antibiotic medicinal residues ash
Content is suitable, its pH meta-alkalescence.When be added to carry out processed in mud when, be more beneficial for the solution exsolution of the outer polymer of mud
Solution, the release beneficial to moisture in mud is it is ensured that the dehydrating effect of mud is preferable.
A kind of mud dewatering method using additive provided by the present invention, comprises the steps：Add in mud
Additive mix, after carry out processed.
The mud dewatering method that the present invention provides is simple to operation, only additive provided by the present invention need to be added to dirt
Fully mix in mud, you can play a role.When carrying out sludge dewatering operation, it is mixed with the granule knot of the mud of described additive
Structure changes, and the permeability of mud and aperture rate increase, and are conducive to the dehydration of mud.
Preferably, in the described addition additive mixing in mud, following steps are specifically included：
Add additive in mud, first under 50-60 rev/min of rotating speed, stir 5-10 minute, after at 10-25 rev/min
Rotating speed under stir 10-15 minute.
Because the moisture in mud forms " film " of densification around mud, result in mud and be difficult with material mixing one
Rise.In the present invention, by first quick stirring 5-10 minute under 50-60 rev/min of rotating speed, form a kind of high shear force, destroy
The compactness of " film " is so that additive can merge in mud.Under 10-25 rev/min of rotating speed, stirring 10-15 divides again afterwards
Clock is it is ensured that the additive merging in mud is uniformly dispersed.
Preferably, in described mud, the content of the antibiotic medicinal residues ash in described additive is 4-10g/L, preferably
4-6g/L.
In the present invention, the usage amount of antibiotic medicinal residues ash is little, and in every liter of mud, the antibiotic medicinal residues ash being added is only 4-
10g, preferably 4-6g.This small consumption will not be to the mud production environment pollution after processing.And, due to antibiolicss
Slag ash is enriched in the green resource of the nutritional labelings such as N, P, K, organic matter, and in this mud after making to process, nutritional labeling increases,
Secondary value greatly improves.It is further preferred that in every liter of mud, the antibiotic medicinal residues ash being added is only 4-6g.
Compared with prior art, beneficial effects of the present invention are：
(1) using the antibiotic medicinal residues ash of safety non-pollution as the additive of sludge dewatering treatment, environment will not be produced
Pollution-free.And, because antibiotic medicinal residues ash is enriched in the green resource of the nutritional labelings such as N, P, K, organic matter, this makes to process
In mud afterwards, nutritional labeling increases, and secondary value greatly improves.
(2) adopt antibiotic medicinal residues ash as the additive of sludge dewatering, not only expand the purposes of antibiotic medicinal residues ash,
And sludge dewatering can also be conducive to.Because antibiotic medicinal residues ash is the granule of relative rigid and surface imperfection, when with dirt
The grain structure of mud when mud mixes, can be changed, increase permeability and the aperture rate of mud.When being dehydrated, can
To reduce resistance, water is made to be easy to pass through, thus being conducive to the dehydration of mud.Secondly as antibiotic medicinal residues ash is meta-alkalescence
Material, rich in elements such as K, P, N, and pH be more than 10.When mixing, be conducive to the solution exsolution of the outer polymer of mud with mud
Solution, beneficial to the release of water.
(3) granularity passing through antibiotic medicinal residues ash preferably used is 0.3-6mm so that antibiotic medicinal residues ash changes further
Mud granule structure, increases permeability and the aperture rate of mud.
(4) pass through in antibiotic medicinal residues ash used by restriction, granularity is that the component of 0.3-0.9mm accounts for 10%-15%, and granularity is
The component of 1-3mm accounts for 30%-40%, and granularity is that the component of 4-6mm accounts for 50%-60%, improves the dehydrating effect of mud further.
(5) jointly processed is carried out to mud using antibiotic medicinal residues ash joint polyacrylamide, not only can reduce
The usage amount of high polymer polyacrylamide, and waste medicinal residues ash can be made full use of.And, when antibiotic medicinal residues grey with poly- third
Acrylamide collective effect, is added to when carrying out processed in mud moreover it is possible to be conducive to the dewatering of municipal sludge to improve, and shows
Write and improve sludge dewatering effect.
(6) in sludge dewatering, the additive adding in mud is first stirred under 50-60 rev/min of rotating speed 5-10 and divide
Clock, forms a kind of high shear force, and the compactness destroying " film " around mud is so that additive can merge in mud.Exist afterwards
Under 10-25 rev/min of rotating speed, stirring 10-15 minute is it is ensured that the additive merging in mud is uniformly dispersed.
(7) in sludge dewatering, the consumption of the antibiotic medicinal residues ash in described additive is few.This small consumption will not
To the mud production environment pollution after processing.And, because antibiotic medicinal residues ash is enriched in the nutritional labelings such as N, P, K, organic matter
Green resource, in this mud after making to process, nutritional labeling increases, and secondary value greatly improves.
Specific embodiment
Below in conjunction with embodiment, embodiment of the present invention is described in detail, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and be not construed as limiting the scope of the present invention.Unreceipted concrete in embodiment
Condition person, the condition according to normal condition or manufacturer's suggestion is carried out.Agents useful for same or the unreceipted production firm person of instrument, are
Can be by the commercially available conventional products bought and obtain.
Embodiment 1
The present embodiment provides a kind of additive for sludge dewatering, and this additive is antibiotic medicinal residues ash.And, it is used
Antibiotic medicinal residues ash in, the percentage composition of N be 2.5%, P percentage composition be the percentage composition of 9%, K be 1%, organic
Percentage composition be 15%.
Embodiment 2
The present embodiment provides a kind of additive for sludge dewatering, and this additive is antibiotic medicinal residues ash.And, it is used
Antibiotic medicinal residues ash in, the percentage composition of N be 5%, P percentage composition be the percentage composition of 15%, K be 5%, organic
Percentage composition is 25%.
Embodiment 3
The present embodiment provides a kind of additive for sludge dewatering, on the basis of embodiment 1, used by the present embodiment
The granularity of antibiotic medicinal residues ash is 6mm.
Embodiment 4
The present embodiment provides a kind of additive for sludge dewatering, on the basis of embodiment 1, used by the present embodiment
In antibiotic medicinal residues ash, granularity is that the component of 0.3-0.9mm accounts for 10%, and granularity is that the component of 1-3mm accounts for 40%, and granularity is 4-
The component of 6mm accounts for 50%.
Embodiment 5
The present embodiment provides a kind of additive for sludge dewatering, on the basis of embodiment 2, used by the present embodiment
In antibiotic medicinal residues ash, granularity is that the component of 0.3-0.9mm accounts for 15%, and granularity is that the component of 1-3mm accounts for 30%, and granularity is 4-
The component of 6mm accounts for 55%.
Embodiment 6
The present embodiment provides a kind of additive for sludge dewatering, on the basis of embodiment 1, adding in the present embodiment
Plus agent also includes polyacrylamide, its quality is the 3% of antibiotic medicinal residues grey matter amount.Both collectively constitute the present embodiment offer
Additive for sludge dewatering.
Embodiment 7
The present embodiment provides a kind of additive for sludge dewatering, on the basis of embodiment 2, adding in the present embodiment
Plus agent also includes PAMC, its quality is the 5% of antibiotic medicinal residues grey matter amount.Both collectively constitute the present embodiment
The additive for sludge dewatering providing.
Embodiment 8
Present embodiments provide above-described embodiment 1-6 additive in order to mud dewatering method during sludge dewatering, specifically
Comprise the steps：
To in mud add additive mix, after carry out processed.
Embodiment 9
Present embodiments provide the method in order to sludge dewatering during sludge dewatering for the additive that embodiment 1-5 provided,
Specifically include following steps：
Add additive in mud, first stir 10 minutes under 50 revs/min of rotating speed, after under 10 revs/min of rotating speed
Stirring 15 minutes.
In mud, the content of the antibiotic medicinal residues ash in described additive is 4g/L.
Embodiment 10
Present embodiments provide the method in order to sludge dewatering during sludge dewatering for the additive that embodiment 6-7 provided,
Specifically include following steps：
Add additive in mud, first stir 10 minutes under 50 revs/min of rotating speed, after under 10 revs/min of rotating speed
Stirring 15 minutes.
In mud, the content of the antibiotic medicinal residues ash in described additive is 4g/L, the polypropylene in described additive
The content of amide (embodiment 7 is PAMC) is 125mg/L.
Experimental example 1
In order to verify the using effect of the additive in order to sludge dewatering treatment provided by the present invention, do in this experimental example
Following contrast test：
Contrast test 1：Take 1000 milliliters of the excess sludge of sewage treatment plant's moisture content 99%, without any additive,
Directly carry out processed.
Comparative example 2：Take 1000 milliliters of the excess sludge of sewage treatment plant's moisture content 99%, add PAMC
125mg stirs.
Experimental example 1：Take 1000 milliliters of the excess sludge of sewage treatment plant's moisture content 99%, add lincomycin medicinal residues ash 4g to stir
Mix uniformly, lincomycin medicinal residues ash used is made through calcination using lincomycin medicinal residues, before and after its calcination component list such as table 1 institute
Show.
Nutrient change before and after table 2 lincomycin medicinal residues calcination
Experimental example 2：Take 1000 milliliters of the excess sludge of sewage treatment plant's moisture content 99%, add clean mould in comparative example 3
Plain medicinal residues ash 4g and PAMC 125mg stirs.
Mud in above-mentioned comparative example and experimental example is measured under pressure 0.035MPa its sludge specific resistance (SRF) and count
Calculate mud compressible coefficient.Its result is as shown in table 2.
Table 2 comparative example and the testing result of experimental example
| SRF/(m/kg) | Mud compressible coefficient | |
| Comparative example 1 | 4.52×1012 | 1.186 |
| Comparative example 2 | 2.255×1012 | 0.866 |
| Experimental example 1 | 3.23×1012 | 1.044 |
| Experimental example 2 | 1.822×1012 | 0.515 |
Note:Sludge specific resistance (SRF) value is less, illustrates that dewatering performance of sludge is better；Mud compressible coefficient is less, and dirt is described
Mud dewatering is better.
As shown in Table 2, can be pressed as the SRF of the mud in the experimental example 1 of additive and mud using medicinal residues ash
The numerical value of contracting coefficient is respectively less than comparative example 1.It can be seen that, can be shown as the additive of sludge dewatering treatment using antibiotic medicinal residues ash
Work improves dewatering performance of sludge.
The result of contrast experiment's example 1, experimental example 2 and comparative example 2 can be seen that antibiotic medicinal residues ash and cation polypropylene
During amide collective effect, when the dewatering of mud is far longer than antibiotic medicinal residues ash or PAMC single effect
Dewatering.It can be seen that, when antibiotic medicinal residues ash and PAMC synergism, antibiotic medicinal residues ash is solidifying as helping
Agent, can change the grain structure of mud, increase permeability and the aperture rate of mud.When being dehydrated, it is possible to reduce resistance,
Water is made to be easy to pass through.And, because antibiotic medicinal residues ash is the material of meta-alkalescence, rich in elements such as K, P, N, and pH is more than
10.When mixing, be conducive to the dissociation dissolving of the outer polymer of mud with mud, beneficial to the release of water.And cation polypropylene acyl
Amine as flocculant, and antibiotic medicinal residues ash synergism, improve the dewatering of mud further so that sludge specific resistance and dirt
Mud compressible coefficient significantly reduces.
Although illustrate and describing the present invention with specific embodiment, but it will be appreciated that without departing substantially from the present invention's
Many other changes can be made in the case of spirit and scope and change.It is, therefore, intended that in the following claims
Including all such changes and modifications belonging in the scope of the invention.
Claims (10)
1. a kind of additive for sludge dewatering is it is characterised in that described additive includes antibiolicss slag ash；Contained with percentage
Amount calculates, and in described antibiotic medicinal residues ash, the content of N is 2.5%-5%, and the content of P is 9%-15%, and the content of K is 1%-
5%, organic content is 15%-25%.
2. additive according to claim 1 is it is characterised in that the granularity of described antibiotic medicinal residues ash is 0.3-6mm.
3. additive according to claim 2 is it is characterised in that in described antibiotic medicinal residues ash, granularity is 0.3-0.9mm
Component account for 10%-15%, granularity be 1-3mm component account for 30%-40%, granularity be 4-6mm component account for 50%-60%.
4. additive according to claim 1 is it is characterised in that also including polyacrylamide in described additive, described
The quality of polyacrylamide is the 3%-5% of described antibiotic medicinal residues grey matter amount.
5. additive according to claim 4 is it is characterised in that described polyacrylamide is PAMC.
6. additive according to claim 1 it is characterised in that described antibiotic medicinal residues ash selected from lincomycin medicinal residues ash,
One or more of penicillin medicinal residues ash, streptomycin medicinal residues ash, tetracycline medicinal residues ash.
7. a kind of usage right requires the mud dewatering method of additive described in any one of 1-6 it is characterised in that including following walking
Suddenly：To in mud add additive mix, after carry out processed.
8. mud dewatering method according to claim 7 is it is characterised in that described add additive to mix in mud
In, specifically include following steps：
Add additive in mud, under 50-60 rev/min of rotating speed, first stir 5-10 minute, after in 10-25 rev/min turn
Speed is lower to stir 10-15 minute.
9. mud dewatering method according to claim 7 is it is characterised in that in described mud, in described additive
The content of antibiotic medicinal residues ash is 4-10g/L.
10. mud dewatering method according to claim 7 is it is characterised in that in described mud, in described additive
The content of antibiotic medicinal residues ash is 4-6g/L.
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| CN108101336B (en) * | 2016-11-25 | 2020-09-11 | 中国石油化工股份有限公司 | Drying treatment process for residual activated sludge |
| CN112358162A (en) * | 2020-12-29 | 2021-02-12 | 山东颖慧园环保科技有限公司 | Additive for sludge dewatering and sludge dewatering method |
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| CN101397181A (en) * | 2008-08-15 | 2009-04-01 | 华中科技大学 | Inorganic composite conditioner and sludge dewatering method thereof |
| CN101633549B (en) * | 2009-08-31 | 2011-09-07 | 江汉大学 | Sludge conditioner and sludge dewatering method thereof |
| CN101851053B (en) * | 2010-06-11 | 2012-05-23 | 上海老港废弃物处置有限公司 | Inorganic composite sludge dehydration conditioner and application thereof |
| CN103613268B (en) * | 2013-12-03 | 2016-03-30 | 湖南科技大学 | A kind of sludge dehydration conditioner and deep dehydration method thereof |
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