CN108423962A - A method of improving dewatering performance of sludge - Google Patents
A method of improving dewatering performance of sludge Download PDFInfo
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- CN108423962A CN108423962A CN201710078234.1A CN201710078234A CN108423962A CN 108423962 A CN108423962 A CN 108423962A CN 201710078234 A CN201710078234 A CN 201710078234A CN 108423962 A CN108423962 A CN 108423962A
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- sludge
- dewatering performance
- biosurfactant
- construction body
- framework construction
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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
- C02F11/121—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
-
- 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
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
Abstract
The invention discloses a kind of method improving dewatering performance of sludge, this method carries out co-conditioning using biosurfactant and framework construction body to primary sludge.Improve the dewatering of sludge in the method for the present invention jointly with framework construction body co-conditioning using biosurfactant, the dewatering of sludge can not only be significantly improved, significantly reduce the moisture content of sludge, it can also realize sludge reduction and reduce the purpose of disposal costs, and treated that moisture percentage in sewage sludge is low through the method for the present invention, poisonous and harmful substance and pathogen content are low, it can be used for filling, compost is directly used in improvement soil, basis is provided for the subsequent processing and utilization of sludge, to realizing the stabilisation of sludge, the disposition of innoxious and recycling treatment is of great significance.
Description
Technical field
The invention belongs to excess sludge of town sewage plant processing technology fields, are related to a kind of side improving dewatering performance of sludge
Method, and in particular to a kind of biosurfactant combines the method for improvement dewatering performance of sludge with framework construction body.
Background technology
Sludge is the by-product of sewage disposal, is a kind of pollutant of enrichment method.Mud organic substance content is high, perishable
It is rotten, there is strong stink, also, after the sludge without appropriately handling enters environment, can be brought directly to water body and air secondary
Pollution, constitutes a serious threat to ecological environment and the mankind.Sludge is properly disposed after having to pass through processing, ecological environment of being allowed for access
System.Related data shows annual China's urban wastewater treatment firm sewage load in 2015 up to 410.3 billion cubic meters, wet dirt
Mud (moisture content 80%) yield reaches 34,000,000 tons, that is, produces 90,000 tons of sludge or more daily.For sludge treatment problem, China is real
It applies《Water prevention and cure of pollution action plan》It requires in scheme (2016-2020), the sludge that sewage treatment facility generates must be into
Row stabilizes, innoxious and recycling treatment is disposed, and prefecture-level city's sewage sludge harmlessness processing disposition rate will be reached before the year two thousand twenty bottom
To 90% or more.In addition, by sludge for subsequently stabilizing, when innoxious and recycling treatment is disposed, to the moisture content of sludge
More stringent requirements are proposed, China《Urban sewage treatment plant sludge disposes blended landfill shale》(GBT 23485-2009) is marked
It is provided in standard, to for blended landfill and the sludge as overburden soil, moisture content need to be less than 60%.Therefore, sludge is studied
Method of disposal is handled, reducing the moisture content of manufacture sludge seems particularly urgent.
Currently, the processing of China's town sewage plant sludge, which mostly divides, all follows " minimizing, innoxious, recycling " principle,
Mainly take the technology path that sludge condensation, sludge conditioning, sludge dewatering, four step of subsequent processing are walked.Existing improvement sludge dewatering
The method of performance mainly has the methods of physics, chemistry and microorganism conditioning, individually using Physical to improving dewatering performance of sludge
Effect is limited, and poor to the low Treatment of Sludge effect of content of organics；Individually using chemical method, that there are medicaments is expensive, increases
The problems such as big follow-up dewatered sludge amount；The problems such as individually being improved using microorganism has the time long, and specific aim is not strong.Due to these
Method there are the problem of, existing conventional conditioning medicament is difficult the mesh realized sludge dewatering minimizing simultaneously and reduce medicament expense
Mark.Therefore, how effectively, cheap improvement dewatering performance of sludge is still a urgent problem needed to be solved.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide it is a kind of it is of low cost, can be notable
Improve the method for dewatering performance of sludge, is significantly improved by biosurfactant and framework construction body co-conditioning in this method
The dewatering of sludge, the moisture content for significantly reducing sludge, and realize sludge reduction and reduce the purpose of disposal costs.
In order to solve the above technical problems, the present invention uses following technical scheme：
A method of improving dewatering performance of sludge, the method is using biosurfactant and framework construction body to original
Beginning sludge carries out co-conditioning.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that the described method comprises the following steps：
S1, primary sludge is improved using biosurfactant；
S2, using framework construction body to through step S1, treated that sludge improves；
Or, the described method comprises the following steps：
S1, primary sludge is improved using framework construction body；
S2, using biosurfactant to through step S1, treated that sludge improves.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that the additive amount of the biosurfactant is every
Biosurfactant 0.2g~the 0.5g is added in kilogram primary sludge.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that the biosurfactant is rhamnolipid, Chinese scholartree
It is one or more in glycolipid, seaweed glycolipid.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that the additive amount of the framework construction body is every kilogram
The framework construction body 0.2g~2.0g is added in the primary sludge.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that the framework construction body be flyash, ardealite,
It is one or more in red mud.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that using the conditioned of the biosurfactant
Journey carries out under agitation；The rotating speed of the stirring is 100r/min~200r/min；The time of the stirring be 10min~
50min；
And/or it is carried out under agitation using the conditioning process of the framework construction body；The rotating speed of the stirring is
100r/min~200r/min；The time of the stirring is 10min~50min；Using the conditioning process of the framework construction body
Middle pH value is 6.8~9.0.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that the primary sludge is concentration basin sludge；The original
The moisture content of beginning sludge is 96% or more.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that further include step S3：To after step S2 processing
Sludge carries out mechanical dehydration, obtains the dewatered sludge that moisture content is 55%~70%.
In the method for above-mentioned improvement dewatering performance of sludge, it is preferred that in the step S3, using plate compression method into
Row mechanical dehydration；Operating pressure is 0.05MPa~2.0MPa in the plate compression method.
Compared with the prior art, the advantages of the present invention are as follows：
(1) proposing for the invention a kind of is improved using biosurfactant and framework construction body co-conditioning
The method of dewatering performance of sludge, one side biosurfactant group are aligned in unimolecule, can be adsorbed on solid liquid interface
On, after soluble in water, the surface tension of water can be reduced, hydrone is reduced in the adsorption energy of Sludge Surface, and improve and organise
The solubility for closing object, to increase sludge dewatering degree；On the other hand, framework construction body material can be by Bio-surface active
The rigid lattice structure of high osmosis is formed in mud cake after agent conditioning, and the compressibility of these framework construction bodies is good, it can
The rate of water loss for improving sludge, to improve the dewatering of sludge.As it can be seen that the present invention improves the method for dewatering performance of sludge
In by using biosurfactant and framework construction body process integration, effectively improve the dewatering of sludge so that de-
The moisture content of sewage sludge is reduced to 55%~70%, is of great significance to realizing sludge reduction and reducing disposal costs.
(2) in method of the invention, biosurfactant is rhamnolipid, sophorolipid, seaweed glycolipid, and having can biology
Degradability can be completely degraded, and acted on environment nonhazardous, not will produce secondary pollution, and large-scale application is suitble to.
(3) in method of the invention, framework construction body is flyash, ardealite, red mud, and compressibility is good, can improve
The rate of water loss of sludge, the slack-off disadvantage of sludge dehydration speed after overcoming biosurfactant is added early period, and can be to sludge
Middle heavy metal plays immobilization, stabilization effect, reduces the content of poisonous and harmful substance in sludge；The present invention is used simultaneously
Framework construction body be industrial waste material, use it for improve sludge dewatering, it can be achieved that " treatment of wastes with processes of wastes against one another " purpose,
And obtain good economic benefit.
(4) moisture content is low in the method for the present invention treated sludge, poisonous and harmful substance and pathogen content are low, Ke Yiyong
In landfill, compost or it is directly used in improvement soil, for the subsequent processing of sludge and using basis is provided, to realizing dewatered sludge
It stabilizes, the disposition of innoxious and recycling treatment is of great significance.
Description of the drawings
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carries out clear, complete description.
Fig. 1 is the process flow chart for improving dewatering performance of sludge in the embodiment of the present invention 1.
Fig. 2 is for different rhamnolipids in the embodiment of the present invention 1~6 and comparative example 1~2 with flyash proportion to sludge CST
Influence diagram.
Fig. 3 is different rhamnolipids and flyash proportion pair in the embodiment of the present invention 1~6, comparative example 1~2 and blank group
The influence diagram of moisture percentage in sewage sludge.
Specific implementation mode
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
Material and instrument employed in following embodiment are commercially available.
Embodiment 1：
A method of improving dewatering performance of sludge, process flow chart is as shown in Figure 1, include the following steps：
(1) it pre-processes：It is derived from the excess sludge of Changsha sewage treatment plant concentration basin, the pH value of wherein excess sludge is
6.8, moisture content 98.8%；Using impurity larger in the sieve removal sludge of 0.66mm, primary sludge is obtained, it is spare.
(2) biosurfactant improves：It is that 0.2g/kg (adds in the primary sludge of i.e. every kilogram step (1) by additive amount
Enter biosurfactant 0.2g) rhamnolipid is added into the primary sludge of step (1), it is to be stirred under 200r/min in rotating speed
15min。
(3) framework construction body improves：It is that 0.2g/kg (is added in the primary sludge of i.e. every kilogram step (1) according to additive amount
Framework construction body 0.2g), flyash is added in through step (2) treated sludge, during control framework construction body conditioning
PH value is 8.15, is to stir 15min under 200r/min in rotating speed.
(4) mechanical dehydration：Using plate and frame filter press press filtration through step (3) treated sludge, wherein operating pressure is
1.5MPa completes the dehydration to sludge.
The water of the mud cake outward transport processing obtained after mechanical dehydration in the present invention or landfill, abjection returns to sewage disposal system.
Comparative example 1：
A method of dewatering performance of sludge, area essentially identical with the processing step of embodiment 1 are improved using rhamnolipid
It is not：It is improved without framework construction body in comparative example 1.
Comparative example 2：
A method of dewatering performance of sludge being improved using flyash, difference essentially identical with the processing step of embodiment 1
It is：The additive amount of flyash is 0.3g/kg in comparative example 2, and does not add biosurfactant and improved.
Embodiment 2：
A method of improving dewatering performance of sludge, it is essentially identical with the processing step of embodiment 1, difference lies in：Implement
The additive amount of flyash is that flyash 0.4g is added in every kilogram of primary sludge in the step of example 2 (3).
Embodiment 3：
A method of improving dewatering performance of sludge, it is essentially identical with the processing step of embodiment 1, difference lies in：Implement
The additive amount of flyash is that flyash 0.6g is added in every kilogram of primary sludge in the step of example 3 (3).
Embodiment 4：
A method of improving dewatering performance of sludge, it is essentially identical with the processing step of embodiment 1, difference lies in：Implement
The additive amount of rhamnolipid is that rhamnolipid 0.4g is added in every kilogram of primary sludge in the step of example 4 (2).
Embodiment 5：
A method of improving dewatering performance of sludge, includes the following steps：
(1) it pre-processes：It is derived from the excess sludge of Changsha sewage treatment plant concentration basin, the pH value of wherein excess sludge is
6.8, moisture content 98.8%；Using impurity larger in the sieve removal sludge of 0.66mm, primary sludge is obtained, it is spare.
(2) biosurfactant improves：It is that 0.4g/kg (adds in the primary sludge of i.e. every kilogram step (1) by additive amount
Enter biosurfactant 0.2g), rhamnolipid is added in the primary sludge obtained to step (1), in rotating speed be 200r/min
Lower stirring 15min.
(3) framework construction body improves：It is that 0.6g/kg (is added in the primary sludge of i.e. every kilogram step (1) according to additive amount
Framework construction body 0.2g), flyash is added in through step (2) treated sludge, during control framework construction body conditioning
PH value is 8.15, is to stir 15min under 200r/min in rotating speed.
(4) mechanical dehydration：Using plate and frame filter press press filtration through step (3) treated sludge, wherein operating pressure is
1.5MPa completes the dehydration to sludge.
Embodiment 6：
A method of improving dewatering performance of sludge, includes the following steps：
(1) it pre-processes：It is derived from the excess sludge of Changsha sewage treatment plant concentration basin, the pH value of wherein excess sludge is
6.8, moisture content 98.8%；Using impurity larger in the sieve removal sludge of 0.66mm, primary sludge is obtained, it is spare.
(2) framework construction body improves：It is that 0.6g/kg (is added in the primary sludge of i.e. every kilogram step (1) according to additive amount
Framework construction body 0.2g), flyash is added in the primary sludge obtained to step (1), during control framework construction body conditioning
PH value is 8.15, is to stir 15min under 200r/min in rotating speed.
(3) biosurfactant improves：It is that 0.4g/kg (adds in the primary sludge of i.e. every kilogram step (1) by additive amount
Enter biosurfactant 0.2g) rhamnolipid is added into through step (2) treated sludge, in rotating speed be under 200r/min
Stir 15min.
(4) mechanical dehydration：Using plate and frame filter press press filtration through step (3) treated sludge, wherein operating pressure is
1.5MPa completes the dehydration to sludge.
In Example 1-6 and comparative example 1-2 it is conditioned after sludge, measure its capillary water absorbing time (CST), test knot
Fruit is as shown in table 1 and Fig. 2；The moisture content of the sludge cake after medicament conditioning and mechanical dehydration, test result such as table 1 are measured simultaneously
Shown in Fig. 3.
The different rhamnolipids of table 1 and influence of the flyash proportion to sludge CST values and moisture content
In table 1, rhamnolipid and flyash proportion：" 0 " indicates raw sewage, does not add any medicament；" 0.2: 0 " indicates to throw
Dosage is the rhamnolipid of 0.2g/kg；" 0: 0.3 " indicates that dosage is the flyash of 0.3g/kg；" 0.2: 0.2 " indicates to add
The flyash that the rhamnolipid and dosage that amount is 0.2g/kg are 0.2g/kg；" 0.2: 0.4 " indicates that dosage is 0.2g/kg
Rhamnolipid and dosage be 0.4g/kg flyash；" 0.2: 0.6 " indicates that dosage is the rhamnolipid of 0.2g/kg
And the flyash that dosage is 0.6g/kg；" 0.4: 0.2 " indicates that dosage is the rhamnolipid and dosage of 0.4g/kg
For the flyash of 0.2g/kg；" 0.4: 0.6 " indicates that the rhamnolipid that dosage is 0.4g/kg and dosage are 0.6g/kg's
Flyash.
CST values are to characterize the important indicator of dewatering performance of sludge, and CST values are bigger, and expression dewatering is poorer.By table 1 and figure
The test result of CST values can be seen that compared to the comparative example 2 (CST values are 108.9s) for being not added with rhamnolipid in 2, and the present invention is real
It is respectively 97.3s and 91.1s to apply CST values in example 1 and embodiment 4, it follows that the CST values of sludge can be made by adding rhamnolipid
It reduces.But when the additive amount of rhamnolipid increases to 0.4g/kg from 0.2g/kg, the CST values variation of sludge is less apparent, shows
Rhamnolipid be not add it is The more the better.
Rhamnolipid additive amount under the same conditions, the CST test results in comparing embodiment 1,2,3 are it is found that fine coal
When the additive amount of ash increases to 0.6g/kg from 0.2g/kg, CST values are significantly reduced to 79.1s from 97.3s, show that flyash is added
More, dewatering performance of sludge is better.However, flyash is added excessively, dewatered sludge volume and weight can be increased, this is unfavorable for realizing
Sludge dewatering minimizing and the target for reducing medicament expense.4-6 and great number tested data are it is found that work as framework construction in conjunction with the embodiments
When the additive amount of body is 0.2g/kg~2.0g/kg, it can either realize sludge dewatering minimizing and reduce the target of medicament expense,
The moisture content of dehydrated sludge can be made close to 60%, even lower than 60% again, to meet national standard (GBT 23485-
2009) regulation in, and low, poisonous and harmful substance and pathogen content are low through moisture content in the method for the present invention treated sludge,
It can be used for landfill, compost or be directly used in improvement soil, for the subsequent processing of sludge and using basis is provided, be dehydrated to realizing
The stabilisation of sludge, the disposition of innoxious and recycling treatment are of great significance.
First add rhamnolipid that the CST values of flyash is added to be 71.0s again in embodiment 5, first flyash is added to add again in embodiment 6
The CST values of rhamnolipid are 73.5s, show that the addition sequence difference of two kinds of medicaments directly affects the conditioning effect of sludge.
By the water cut test result of dehydrated sludge mud cake in table 1 and Fig. 3 it is found that comparing blank group, comparative example 1 and right
The water cut test of ratio 2 as a result, it has been found that, be individually added into rhamnolipid or flyash, the moisture content of primary sludge can be reduced,
But the moisture content of sludge is still relatively high, is such as individually added into moisture content still up to 93.4%, the list of sludge after rhamnolipid processing
The moisture content that sludge after flyash is handled solely is added is up to 85.3%.Rhamnolipid additive amount under the same conditions, it is relatively real
The test result of moisture percentage in sewage sludge in a 1-6 is applied it is found that after flyash joint addition, addition is more, the moisture content of sludge
It is lower；When the additive amount of rhamnolipid and flyash is respectively 0.4g/kg and 0.6g/kg, the sludge after plate compression
Moisture content can drop to 58.2%.
After first adding rhamnolipid that flyash is added to improve again in embodiment 5, the moisture content of final sludge is 58.2%, embodiment
After first adding flyash that rhamnolipid is added to improve again in 6, the moisture content of final sludge is 69.8%, under the conditions of showing Isodose,
The addition sequence difference of two kinds of medicaments can directly affect the moisture content of follow-up sludge.
In the present invention, the additive amount of biosurfactant is that the biosurfactant is added in every kilogram of sludge
0.2g~0.5g, the additive amount of framework construction body are that the framework construction body 0.2g~2.0g is added in every kilogram of sludge,
Same or analogous technique effect can be reached.
In the present invention, biosurfactant is one or more, the skeleton in rhamnolipid, sophorolipid, seaweed glycolipid
Construct is one or more in flyash, ardealite, red mud, can reach same or analogous technique effect.
Embodiment 7：
A method of improving dewatering performance of sludge, it is essentially identical with the processing step of embodiment 5, difference lies in：Implement
PH value control is 6.83 during the framework construction body conditioning of 7 step of example (3).
Embodiment 8：
A method of improving dewatering performance of sludge, it is essentially identical with the processing step of embodiment 5, difference lies in：Implement
PH value control is 7.10 during the framework construction body conditioning of 8 step of example (3).
Embodiment 9：
A method of improving dewatering performance of sludge, it is essentially identical with the processing step of embodiment 5, difference lies in：Implement
PH value control is 8.78 during the framework construction body conditioning of 9 step of example (3).
In Example 7-9 it is conditioned after sludge, measure its capillary water absorbing time (CST)；It is mechanical in Example 7-9
Dehydrated sludge measures the moisture content of mud cake, and test result is as shown in table 2.
Influence of the different pH value of table 2 to sludge CST values and moisture content
| Index | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| Rhamnolipid and flyash proportion | 0.4∶0.6 | 0.4∶0.6 | 0.4∶0.6 |
| CST values (s) | 86.7 | 84.3 | 73.5 |
| Moisture content (%) | 64.03 | 63.30 | 63.8 |
By CST values in Tables 1 and 2 and moisture content of the cake test result it is found that pH value control during the conditioning of framework construction body
System has a significant impact to the CST values of sludge and final moisture content, corresponding when wherein pH value is 6.83,7.10,8.15,8.78
CST values are respectively 86.7s, 84.3s, 71.0s, 73.5s, it can be seen that, pass through the pH during control framework construction body conditioning
Value significantly reduces the CST values of sludge, to improve dewatering performance of sludge.Meanwhile pH value 6.83,7.10,8.15,
Corresponding moisture content is respectively 64.03%, 63.30%, 58.2%, 63.8% when 8.78, i.e., by controlling framework construction body tune
PH value during reason significantly reduces the moisture content of sludge, and the moisture content of dehydrated sludge is close to 60% or even low
In 60%, to meet regulation in national standard (GBT 23485-2009).Therefore, by controlling the conditioning of framework construction body in the present invention
PH value in the process is of great significance to reducing moisture percentage in sewage sludge.
In the present invention, pH value control is 6.8~9.0 during the conditioning of framework construction body, can be reached same or analogous
Technique effect.
In conclusion can significantly be changed using the method for biosurfactant and framework construction body co-conditioning in the present invention
The dewatering of kind sludge, and this method has the advantages that of low cost, can either realize sludge dewatering minimizing and reduction medicine
The target of agent expense, and the moisture content in sludge and poisonous and harmful substance, the content of pathogen can be reduced, it can be used for filling out
It buries, compost or be directly used in improvement soil, for the subsequent processing of sludge and using basis is provided, to realizing the stabilization of dewatered sludge
Change, the disposition of innoxious and recycling treatment is of great significance.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example.All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It is noted that for the art
Those of ordinary skill for, improvements and modifications without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of method improving dewatering performance of sludge, which is characterized in that the method uses biosurfactant and skeleton
Construct carries out co-conditioning to primary sludge.
2. the method according to claim 1 for improving dewatering performance of sludge, which is characterized in that the method includes following steps
Suddenly：
S1, primary sludge is improved using biosurfactant；
S2, using framework construction body to through step S1, treated that sludge improves；
Or, the described method comprises the following steps：
S1, primary sludge is improved using framework construction body；
S2, using biosurfactant to through step S1, treated that sludge improves.
3. the method according to claim 2 for improving dewatering performance of sludge, which is characterized in that the biosurfactant
Additive amount be every kilogram of primary sludge in the biosurfactant 0.2g~0.5g is added.
4. the method according to claim 3 for improving dewatering performance of sludge, which is characterized in that the biosurfactant
It is one or more in rhamnolipid, sophorolipid, seaweed glycolipid.
5. the method according to claim 2 for improving dewatering performance of sludge, which is characterized in that the framework construction body adds
Dosage is that the framework construction body 0.2g~2.0g is added in every kilogram of primary sludge.
6. the method according to claim 5 for improving dewatering performance of sludge, which is characterized in that the framework construction body is powder
It is one or more in coal ash, ardealite, red mud.
7. the method for the improvement dewatering performance of sludge according to any one of claim 2~6, which is characterized in that use institute
The conditioning process for stating biosurfactant carries out under agitation；The rotating speed of the stirring is 100r/min~200r/
min；The time of the stirring is 10min~50min；
And/or it is carried out under agitation using the conditioning process of the framework construction body；The rotating speed of the stirring is 100r/
Min~200r/min；The time of the stirring is 10min~50min；Using pH value during the conditioning of the framework construction body
It is 6.8~9.0.
8. the method for the improvement dewatering performance of sludge according to any one of claim 2~6, which is characterized in that the original
Beginning sludge is concentration basin sludge；The moisture content of the primary sludge is 96% or more.
9. the method for the improvement dewatering performance of sludge according to any one of claim 2~6, which is characterized in that further include
Step S3：Mechanical dehydration is carried out to sludge after step S2 processing, obtains the dewatered sludge that moisture content is 55%~70%.
10. the method according to claim 9 for improving dewatering performance of sludge, which is characterized in that in the step S3, use
Plate compression method carries out mechanical dehydration；Operating pressure is 0.05MPa~2.0MPa in the plate compression method.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461304A (en) * | 2021-08-05 | 2021-10-01 | 上海大学 | Red mud-based mixed acid chemical conditioner special for deep dehydration of dehydrated sludge and use method thereof |
| WO2024015720A1 (en) * | 2022-07-11 | 2024-01-18 | Locus Solutions Ipco, Llc | Compositions and methods for dewatering |
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| CN108423962B (en) | 2020-12-29 |
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