CN110117149A - A kind of Opsonizing method of catalysis oxidation type sludge conditioner and sludge - Google Patents
A kind of Opsonizing method of catalysis oxidation type sludge conditioner and sludge Download PDFInfo
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- CN110117149A CN110117149A CN201910399749.0A CN201910399749A CN110117149A CN 110117149 A CN110117149 A CN 110117149A CN 201910399749 A CN201910399749 A CN 201910399749A CN 110117149 A CN110117149 A CN 110117149A
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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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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
- 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 catalysis oxidation type sludge conditioner and the Opsonizing methods of sludge, the catalysis oxidation type sludge conditioner includes oxidant, catalyst, coagulant and flocculant, the oxidant is permonosulphuric acid hydrogen salt complex salt, catalyst is cobalt salt, coagulant is aluminium polychloride, and flocculant is polyacrylamide.Sludge conditioning method of the invention improves sludge using catalysis oxidation type sludge conditioner, improves the dewatering of sludge, cooperative mechanical dehydration, so that mud extraction moisture content is reduced to 60% or less.Meanwhile solving the problems, such as that existing Sludge Chemical Conditioning technology conditioner dosage is big and sludge increase-volume is serious, conducive to the processing and disposition of sludge.
Description
Technical field
The present invention relates to a kind of catalysis oxidation type sludge conditioner and the Opsonizing methods of sludge.
Background technique
With urbanization develop, the sludge quantity of China's municipal wastewater processing is continuously increased.Moisture percentage in sewage sludge is more than 97%,
Moisture percentage in sewage sludge is still 90% or so after Direct Dehydration.Moisture percentage in sewage sludge is high, bulky, to later period Treatment of Sludge and disposition
Bring very big difficulty.
Chemical amendment is widely used in sludge dewatering technology, and conditioner lime, flyash, molysite etc. are applied to tradition
In sludge dewatering technology.This traditional sludge dehydration technique, conditioner dosage is big, and sludge increase-volume is serious, at high cost, gives the later period
Sludge treatment brings many difficulties.
Summary of the invention
Present invention solves the technical problem that being to overcome existing chemical conditioning sludge dewatering technology conditioner dosage big
The serious disadvantage with sludge increase-volume, provides that a kind of conditioner is adding less, catalysis oxidation type sludge conditioner of sludge not increase-volume
And its Opsonizing method of sludge.
A kind of catalysis oxidation type sludge conditioner, it is characterised in that including oxidant, catalyst, coagulant and wadding
Solidifying agent, the oxidant are permonosulphuric acid hydrogen salt complex salt, and catalyst is cobalt salt, and coagulant is aluminium polychloride, and flocculant is
Polyacrylamide.
A kind of catalysis oxidation type sludge conditioner, it is characterised in that the work in the permonosulphuric acid hydrogen salt complex salt
Property ingredient be permonosulphuric acid hydrogen salt, the dosage weight ratio of the permonosulphuric acid hydrogen salt is the 0.047% ~ 0.056% of over dry sludge quantity,
The dosage weight ratio of cobalt ions in cobalt salt is the 0.010% ~ 0.011% of over dry sludge quantity.
A kind of catalysis oxidation type sludge conditioner, it is characterised in that the dosage weight ratio of aluminium polychloride is over dry
The 12% ~ 13% of sludge quantity, the dosage weight ratio of polyacrylamide are the 0.0015% ~ 0.0017% of over dry sludge quantity.
The Opsonizing method of a kind of sludge, it is characterised in that include the steps that next coming in order carry out:
1) sludge is added in sludge agitation device；
2) cobalt salt and permonosulphuric acid hydrogen salt complex salt is added, is then stirred；
3) aluminium polychloride is added, is stirred；
4) polyacrylamide is added, is stirred；
5) sludge after mixing evenly is subjected to mechanical dehydration.
A kind of Opsonizing method of the sludge, it is characterised in that in step 1), the sludge is secondary settling tank excess sludge,
Its moisture content 99.1% ~ 99.3%, 7.2 ~ 7.5g/L of TSS, 5.2 ~ 5.5g/L of VSS, pH are 6.7 ~ 7.1.
The Opsonizing method of a kind of sludge, it is characterised in that in step 2, cobalt salt is added to the dosage in sludge and is
0.7 ~ 0.8mg cobalt ions/every liter of sludge, the active constituent in permonosulphuric acid hydrogen salt complex salt are permonosulphuric acid hydrogen salt, the mistake
It is 3.5 ~ 4.0mg permonosulphuric acid hydrogen salt/every liter of sludge that one disulfate, which is added to the dosage in sludge,；In step 2, stirring speed
Rate is 180 ~ 220rpm, and preferably 200rpm, mixing time is 20 ~ 40 minutes, preferably 30 minutes.
A kind of Opsonizing method of the sludge, it is characterised in that the coagulant polymeric aluminium chloride being added in step 3),
Dosage weight ratio is the 12% ~ 13% of over dry sludge quantity；In step 3), stirring rate is 80 ~ 120rpm, and mixing time is 0.8 ~ 2
Minute.
A kind of Opsonizing method of the sludge, it is characterised in that the flocculant polyacrylamide being added in step 4),
Dosage is 0.11mg ~ 0.12mg polyacrylamide/every liter of sludge；Speed of agitator in step 4) successively decreases at any time, process are as follows: with
The revolving speed of 48 ~ 52rpm stirs 3 ~ 5 minutes, and then adjusting revolving speed is that 33 ~ 37rpm is stirred 3 ~ 5 minutes, finally adjust revolving speed be 18 ~
22rpm is stirred 3 ~ 5 minutes.The purpose that speed of agitator in step 4) successively decreases at any time is: stirring rate is gradually reduced, be because
It is gradually grown up for condensate by adsorption bridging, it is big to start revolving speed, is to accelerate uniformly to mix, while it is long to help condensate
Greatly, finally reduce is because revolving speed is excessively high to be unfavorable for big floccule body formation (preventing from stirring from destroying big floccule body to be formed).
The Opsonizing method of a kind of sludge, it is characterised in that the mechanical dewatering process of step 5) includes: by into mud
Pressure is that sludge feeding squeeze pressure into dredge pump is up to the filter press of 1.8MPa by 0.9MPa, dehydration treatment time is 70 ~
90 minutes.
The Opsonizing method of a kind of sludge, it is characterised in that moisture percentage in sewage sludge of the step 5) after mechanical dehydration be
60% or less.
Catalysis oxidation type sludge conditioner and sludge conditioning method of the invention compared with prior art, has beneficial below
Effect.
1, the degradable sludge extracellular polymeric (EPS) of catalysis oxidation type sludge conditioner of the invention and the destruction micro- life of sludge
Object cell helps to discharge the combination water in the water and microbial cell that sludge extracellular polymeric (EPS) is combined, to mention
High dewatering performance of sludge.
2, potassium hydrogen persulfate composite salts are by potassium hydrogen persulfate KHSO5, potassium acid sulfate KHSO4With potassium sulfate K2SO4Three kinds
At being grouped as, it is marked as 2 KHSO5·KHSO4·K2SO4.Cobalt ions can be catalyzed 2 KHSO5·KHSO4·K2SO4It generates
The potentiometric titrations of strong oxidizing property, and the dosage of cobalt ions is few, the potentiometric titrations of the strong oxidizing property pass through Oxidative demage
Sludge extracellular polymeric and microbial cell, so that sludge is easier to be dehydrated.Coagulant polymeric aluminium chloride, sludge promote to be formed solidifying
Aggressiveness；Polyacrylamide adsorption bridging is at big floccule body.The sulfate radical for having used cobalt ions catalysis to generate strong oxidizing property is free
Base, oxidation susceptibility is strong, and added amount of chemical is few, at low cost.Coagulant and flocculant are arranged in pairs or groups, and aluminium polychloride and poly- third are made full use of
The characteristics of acrylamide, sedimentation effect is more preferable, more dehydration.
3, sludge conditioning method of the invention improves sludge using catalysis oxidation type sludge conditioner, improves the de- of sludge
Aqueous energy, cooperative mechanical dehydration, so that mud extraction moisture content is reduced to 60% or less.Meanwhile solving existing Sludge Chemical Conditioning skill
The problem that art conditioner dosage is big and sludge increase-volume is serious, conducive to the processing of sludge.
Specific embodiment
The present invention is further explained in the light of specific embodiments, but the scope of protection of the present invention is not limited thereto.
In following embodiment and comparative example, potassium hydrogen persulfate composite salts are purchased from the limited public affairs of the clean magnificent chemical industry in Shaoxing Shangyu
It takes charge of, the active constituent in potassium hydrogen persulfate composite salts is potassium hydrogen peroxymonosulfate.
Embodiment 1:
The present embodiment utilizes the Opsonizing method of catalysis oxidation type conditioner, comprising the following steps:
1) sludge is added in sludge agitation device, the sludge is secondary settling tank excess sludge, moisture content 99.2%, TSS 7.3g/
L, VSS 5.3g/L, 7.0 pH；
2) cobalt chloride and potassium hydrogen persulfate composite salts are added, the cobalt chloride dosage of addition is 0.8mg cobalt ions/every liter of sludge,
It is 3.6mg potassium hydrogen peroxymonosulfate/every liter of sludge that active constituent in potassium hydrogen persulfate composite salts, which is added to the dosage in sludge,
Then it is stirred, speed of agitator is 200 revs/min, and when stirring is 30 minutes a length of；
3) coagulant polymeric aluminium chloride is added, the aluminium polychloride dosage weight ratio of addition is the 12.0% of over dry sludge quantity, then
It is stirred, speed of agitator is 100 revs/min, and when stirring is 1 minute a length of；
4) it is subsequently added into flocculant polyacrylamide, dosage is 0.12mg polyacrylamide/every liter of sludge, and then stirring is mixed
It closes, is stirred 4 minutes with 50 revs/min of revolving speeds, then adjusting revolving speed is that 35 revs/min of revolving speeds stir 4 minutes, finally adjusts revolving speed
It is stirred 4 minutes for 20 revs/min；
5) by after mixing evenly sludge carry out mechanical dehydration, specifically: by into mud pressure be 0.9MPa will be dirty into dredge pump
Mud is sent into the filter press that squeeze pressure is up to 1.8MPa, and dehydration treatment time is 80 minutes, after last mechanical dehydration, out
Mud moisture content of the cake is 58.4%.
Embodiment 2:
The present embodiment utilizes the Opsonizing method of catalysis oxidation type conditioner, comprising the following steps:
1) sludge is added in sludge agitation device, the sludge is secondary settling tank excess sludge, moisture content 99.1%, TSS 7.4
G/L, VSS 5.4g/L, pH 6.9；
2) cobalt chloride and potassium hydrogen persulfate composite salts are added, the cobalt chloride dosage of addition is 0.7mg cobalt ions/every liter of sludge,
It is 3.9mg potassium hydrogen peroxymonosulfate/every liter of sludge that active constituent in potassium hydrogen persulfate composite salts, which is added to the dosage in sludge,
Then it is stirred, speed of agitator is 200 revs/min, and when stirring is 30 minutes a length of；
3) coagulant polymeric aluminium chloride is added, the aluminium polychloride dosage weight ratio of addition is the 12.6% of over dry sludge quantity, then
It is stirred, speed of agitator is 100 revs/min, and when stirring is 1 minute a length of；
4) it is subsequently added into flocculant polyacrylamide, dosage is 0.11mg polyacrylamide/every liter of sludge, and then stirring is mixed
It closes, is stirred 4 minutes with 50 revs/min of revolving speeds, then adjusting revolving speed is that 35 revs/min of revolving speeds stir 4 minutes, finally adjusts revolving speed
It is stirred 4 minutes for 20 revs/min；
5) by after mixing evenly sludge carry out mechanical dehydration, specifically: by into mud pressure be 0.9MPa will be dirty into dredge pump
Mud is sent into the filter press that squeeze pressure is up to 1.8MPa, and dehydration treatment time is 80 minutes, after last mechanical dehydration, out
Mud moisture content of the cake is 57.6%.
Embodiment 3:
The present embodiment utilizes the Opsonizing method of catalysis oxidation type conditioner, comprising the following steps:
1) sludge is added in sludge agitation device, the sludge is secondary settling tank excess sludge, moisture content 99.3%, TSS 7.2
5.2 g/L, pH 6.8 of g/L, VSS；
2) cobalt chloride and potassium hydrogen persulfate composite salts are added, the cobalt chloride dosage of addition is 0.8mg cobalt ions/every liter of sludge,
It is 3.8mg potassium hydrogen peroxymonosulfate/every liter of sludge that active constituent in potassium hydrogen persulfate composite salts, which is added to the dosage in sludge,
Then it is stirred, speed of agitator is 200 revs/min, and when stirring is 30 minutes a length of；
3) coagulant polymeric aluminium chloride is added, the aluminium polychloride dosage weight ratio of addition is the 13.0% of over dry sludge quantity, then
It is stirred, speed of agitator is 100 revs/min, and when stirring is 1 minute a length of；
4) it is subsequently added into flocculant polyacrylamide, dosage is 0.12mg polyacrylamide/every liter of sludge, and then stirring is mixed
It closes, is stirred 4 minutes with 50 revs/min of revolving speeds, then adjusting revolving speed is that 35 revs/min of revolving speeds stir 4 minutes, finally adjusts revolving speed
It is stirred 4 minutes for 20 revs/min；
5) by after mixing evenly sludge carry out mechanical dehydration, specifically: by into mud pressure be 0.9MPa will be dirty into dredge pump
Mud is sent into the filter press that squeeze pressure is up to 1.8MPa, and dehydration treatment time is 80 minutes, after last mechanical dehydration, out
Mud moisture content of the cake is 57.8%.
Comparative example 1:(successively decreases to specific speed)
The present embodiment utilizes the Opsonizing method of catalysis oxidation type conditioner, comprising the following steps:
1) sludge is added in sludge agitation device, the sludge is secondary settling tank excess sludge, moisture content 99.2%, TSS 7.3g/
L, VSS 5.3g/L, 7.0 pH；
2) cobalt chloride and potassium hydrogen persulfate composite salts are added, the cobalt chloride dosage of addition is 0.8mg cobalt ions/every liter of sludge,
It is 3.6mg potassium hydrogen peroxymonosulfate/every liter of sludge that active constituent in potassium hydrogen persulfate composite salts, which is added to the dosage in sludge,
Then it is stirred, speed of agitator is 200 revs/min, and when stirring is 30 minutes a length of；
3) coagulant polymeric aluminium chloride is added, the aluminium polychloride dosage weight ratio of addition is the 12.0% of over dry sludge quantity, then
It is stirred, speed of agitator is 100 revs/min, and when stirring is 1 minute a length of；
4) it is subsequently added into flocculant polyacrylamide, dosage is 0.12mg polyacrylamide/every liter of sludge, and then stirring is mixed
It closes, is stirred 16 minutes with 50 revs/min of revolving speeds；
5) by after mixing evenly sludge carry out mechanical dehydration, specifically: by into mud pressure be 0.9MPa will be dirty into dredge pump
Mud is sent into the filter press that squeeze pressure is up to 1.8MPa, and dehydration treatment time is 80 minutes, after last mechanical dehydration, out
Mud moisture content of the cake is (61.2%).
It can be seen that step 4) by the experimental result of embodiment 1 and comparative example 1 and the speed of agitator after flocculant be added
Setting has a certain impact to sludge dewatering, and the larger formation for being unfavorable for floccule body formation of speed of agitator is unfavorable for last sludge
Dehydrating effect.
It is hydrogen peroxide that comparative example 2:(, which compares oxidant)
This comparative example replaces cobalt chloride and potassium hydrogen persulfate composite salts as oxidant using hydrogen peroxide and compares experiment,
The following steps are included:
1) sludge is added in sludge agitation device, the sludge is secondary settling tank excess sludge, moisture content 99.1%, TSS 7.4
G/L, VSS 5.4g/L, pH 6.9；
2) hydrogenperoxide steam generator is added, addition hydrogen peroxide use is 4.6 mg hydrogen peroxide/every liter of sludge, and then stirring is mixed
It closes, speed of agitator is 200 revs/min, and when stirring is 30 minutes a length of；
3) coagulant polymeric aluminium chloride is added, the aluminium polychloride dosage weight ratio of addition is the 12.6% of over dry sludge quantity, then
It is stirred, speed of agitator is 100 revs/min, and when stirring is 1 minute a length of；
4) it is subsequently added into flocculant polyacrylamide, dosage is 0.11mg polyacrylamide/every liter of sludge, and then stirring is mixed
It closes, is stirred 4 minutes with 50 revs/min of revolving speeds, then adjusting revolving speed is that 35 revs/min of revolving speeds stir 4 minutes, finally adjusts revolving speed
It is stirred 4 minutes for 20 revs/min；
5) by after mixing evenly sludge carry out mechanical dehydration, specifically: by into mud pressure be 0.9MPa will be dirty into dredge pump
Mud is sent into the filter press that squeeze pressure is up to 1.8MPa, and dehydration treatment time is 80 minutes, after last mechanical dehydration, out
Mud moisture content of the cake is 64.4%.
It can be seen that by the experimental result of embodiment 2 and comparative example 2 for the cobalt ions in embodiment 2 and cross a sulphur
Total mass concentration of the potassium hydrogen phthalate in sludge is (3.9mg+0.7mg)/every liter of sludge, and comparative example 2 is using equal quality concentration
Hydrogen peroxide is replaced, it can be seen that the dehydrating effect using sludge when hydrogen peroxide is poor, this may be because of peroxidating
Hydrogen is poor by the ability of Oxidative demage sludge extracellular polymeric and microbial cell, influences the dehydrating effect of final sludge.
Content described in this specification is only to enumerate to inventive concept way of realization, and protection scope of the present invention is not answered
When the concrete form for being seen as limited by embodiment and being stated.
Claims (10)
1. a kind of catalysis oxidation type sludge conditioner, it is characterised in that including oxidant, catalyst, coagulant and flocculant, institute
Stating oxidant is permonosulphuric acid hydrogen salt complex salt, and catalyst is cobalt salt, and coagulant is aluminium polychloride, and flocculant is polyacrylamide
Amine.
2. a kind of catalysis oxidation type sludge conditioner as described in claim 1, it is characterised in that the permonosulphuric acid hydrogen salt is multiple
Closing the active constituent in salt is permonosulphuric acid hydrogen salt, and the dosage weight ratio of the permonosulphuric acid hydrogen salt is over dry sludge quantity
0.047% ~ 0.056%, the dosage weight ratio of the cobalt ions in cobalt salt is the 0.010% ~ 0.011% of over dry sludge quantity.
3. a kind of catalysis oxidation type sludge conditioner as described in claim 1, it is characterised in that the dosage weight of aluminium polychloride
Amount than being the 12% ~ 13% of over dry sludge quantity, the dosage weight ratio of polyacrylamide be over dry sludge quantity 0.0015% ~
0.0017%。
4. a kind of Opsonizing method of sludge, it is characterised in that include the steps that next coming in order carry out:
1) sludge is added in sludge agitation device；
2) cobalt salt and permonosulphuric acid hydrogen salt complex salt is added, is then stirred；
3) aluminium polychloride is added, is stirred；
4) polyacrylamide is added, is stirred；
5) sludge after mixing evenly is subjected to mechanical dehydration.
5. a kind of Opsonizing method of sludge as claimed in claim 4, it is characterised in that in step 1), the sludge is two heavy
Pond excess sludge, moisture content 99.1% ~ 99.3%, 7.2 ~ 7.5g/L of TSS, 5.2 ~ 5.5g/L of VSS, pH are 6.7 ~ 7.1.
6. a kind of Opsonizing method of sludge as claimed in claim 5, it is characterised in that in step 2, cobalt salt is added in sludge
Dosage be 0.7 ~ 0.8mg cobalt ions/every liter of sludge, the active constituent in permonosulphuric acid hydrogen salt complex salt is hydrogen peroxymonosulfate
Salt, it is 3.5 ~ 4.0mg permonosulphuric acid hydrogen salt/every liter of sludge that the permonosulphuric acid hydrogen salt, which is added to the dosage in sludge,；Step 2
In, stirring rate is 180 ~ 220rpm, and preferably 200rpm, mixing time is 20 ~ 40 minutes, preferably 30 minutes.
7. a kind of Opsonizing method of sludge as claimed in claim 5, it is characterised in that the coagulant polymeric being added in step 3)
Aluminium chloride, dosage weight ratio are the 12% ~ 13% of over dry sludge quantity；In step 3), stirring rate is 80 ~ 120rpm, when stirring
Between be 0.8 ~ 2 minute.
8. a kind of Opsonizing method of sludge as claimed in claim 5, it is characterised in that the flocculant being added in step 4) poly- third
Acrylamide, dosage are 0.11mg ~ 0.12mg polyacrylamide/every liter of sludge；Speed of agitator in step 4) successively decreases at any time,
Process are as follows: stirred 3 ~ 5 minutes with the revolving speed of 48 ~ 52rpm, then adjusting revolving speed is that 33 ~ 37rpm is stirred 3 ~ 5 minutes, is finally adjusted
Revolving speed is that 18 ~ 22rpm is stirred 3 ~ 5 minutes.
9. a kind of Opsonizing method of sludge as claimed in claim 4, it is characterised in that the mechanical dewatering process of step 5) includes:
By being that sludge feeding squeeze pressure into dredge pump is up to the filter press of 1.8MPa by 0.9MPa into mud pressure, when dehydration
Between be 70 ~ 90 minutes.
10. a kind of Opsonizing method of sludge as claimed in claim 4, it is characterised in that sludge of the step 5) after mechanical dehydration
Moisture content is 60% or less.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110563290A (en) * | 2019-09-09 | 2019-12-13 | 湖南鑫恒环境科技有限公司 | in-situ deep dehydration treatment method for urban sludge plant |
| CN111068659A (en) * | 2019-12-13 | 2020-04-28 | 中山大学 | Composite piezoelectric catalytic material, preparation method thereof and sludge dewatering application |
| CN112537832A (en) * | 2020-12-03 | 2021-03-23 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of flocculant containing potassium hydrogen peroxymonosulfate composite salt, product and application thereof |
| CN113429112A (en) * | 2021-06-23 | 2021-09-24 | 宁波职业技术学院 | Novel sludge dewatering method |
| CN114409223A (en) * | 2022-01-19 | 2022-04-29 | 中国科学院生态环境研究中心 | Advanced oxidation synchronous/coupling flocculation conditioning method for deep dehydration of sludge |
| CN115124204A (en) * | 2022-06-16 | 2022-09-30 | 安徽省交通航务工程有限公司 | Processing method for realizing rapid mud-water separation of dredged mud |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110563290A (en) * | 2019-09-09 | 2019-12-13 | 湖南鑫恒环境科技有限公司 | in-situ deep dehydration treatment method for urban sludge plant |
| CN111068659A (en) * | 2019-12-13 | 2020-04-28 | 中山大学 | Composite piezoelectric catalytic material, preparation method thereof and sludge dewatering application |
| CN111068659B (en) * | 2019-12-13 | 2021-02-05 | 中山大学 | Composite piezoelectric catalytic material, preparation method thereof and sludge dewatering application |
| CN112537832A (en) * | 2020-12-03 | 2021-03-23 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of flocculant containing potassium hydrogen peroxymonosulfate composite salt, product and application thereof |
| CN113429112A (en) * | 2021-06-23 | 2021-09-24 | 宁波职业技术学院 | Novel sludge dewatering method |
| CN114409223A (en) * | 2022-01-19 | 2022-04-29 | 中国科学院生态环境研究中心 | Advanced oxidation synchronous/coupling flocculation conditioning method for deep dehydration of sludge |
| CN115124204A (en) * | 2022-06-16 | 2022-09-30 | 安徽省交通航务工程有限公司 | Processing method for realizing rapid mud-water separation of dredged mud |
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Application publication date: 20190813 |