CN110467332A - A kind of efficient sludge conditioning and dewatering - Google Patents
A kind of efficient sludge conditioning and dewatering Download PDFInfo
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- CN110467332A CN110467332A CN201910876847.9A CN201910876847A CN110467332A CN 110467332 A CN110467332 A CN 110467332A CN 201910876847 A CN201910876847 A CN 201910876847A CN 110467332 A CN110467332 A CN 110467332A
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- sludge
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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
- C02F11/02—Biological treatment
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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
- C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of sludge conditioning-horizontal component of electric field dehydration method, the key step of this method is as follows: (1) being ultrasonically treated to sludge；(2) conditioning of mud temperature, pH；(3) Thiobacillus, siderite, persulfate are added in sludge, are uniformly mixed, are carried out the reaction of certain time；(4) access horizontal component of electric field is dehydrated.The present invention is combined with ultrasound destruction microbial cell, Thiobacillus promotes siderite and persulfate oxidation reaction, excite the generation of potentiometric titrations, form the redox cycle of Fe (II), breaking sludge structure, parallel connection is closed horizontal component of electric field and is dehydrated, respective advantage is given full play to, synergy is generated, moisture percentage in sewage sludge after conditioning is made to be down to 50-70%.This Opsonizing method step is clear, easy to operate, avoids and adds excessive siderite and generate excessive Fe2+, save the cost, dehydrating effect is obvious, without secondary pollution.
Description
Technical field
A kind of efficient sludge conditioning and dewatering, belong to environmental technology field.
Background technique
In China, due to society, the fast development of economy and urbanization, municipal sewage plant (WWTPs) is produced greatly
The sludge of amount, it is contemplated that 60,000,000 tons/year will be broken through to the year two thousand twenty sludge yield.Contain a large amount of pathogen, weight in excess sludge
Metal and organic agricultural chemicals can bring harm to environmental quality, human health.The processing disposition of sludge has become severe environment
Problem." the water prevention and cure of pollution action plan " that China in 2015 promulgates needs to promote at Treatment of Sludge for sludge is especially set out
It sets, the sludge that sewage treatment facility generates should carry out minimizing, stabilisation, innoxious and recycling, how sludge be effectively reduced
Moisture content is the key link of Treatment of Sludge.
The processing unit for realizing mud decrement includes conditioning and dehydration.Wherein, physics conditioning mainly has microwave, ultrasound, heat
Hydrolyze method etc., microwave and pyrohydrolysis mainly utilize external energy to generate heat, so that sludge particle generates warm-up movement, cell is heated
Rupture discharges wherein internal water.But general high temperature preprocessing process, not only energy consumption is high, pretreatment cost is considerably increased,
And high temperature is frequently accompanied by foul gas, the generation of toxic tail gas causes secondary pollution to environment.And ultrasound is existed using ultrasonic wave
The micro-cavities of numerous air-bubble shape are generated in liquid, cavity instantaneously bursts apart, and destroy sludge zoogloea by biggish shearing force,
To discharge organic matter and moisture therein, treatment effect is preferable, without secondary pollution.Chemical conditioning is using chemical substance (medicine
Agent) improve dewatering performance of sludge, easy to operate, effect stability, operating cost is lower, is a kind of method being widely used at present.
Biology conditioning is the new technology improved using microorganism or microbial metabolic products sludge, using in waste sludge
The ingredients such as carbon, nitrogen, phosphorus are growth substrate, to achieve the effect that mud decrement and destroy the high pore structure of sludge.In general, single
The function and effect of one conditioning are limited, and therefore, it will be that improve dewatering performance of sludge will be a kind of that different Opsonizing methods, which are carried out joint,
Selection.The present invention can further crack cell inside EPS and sludge, release using physics conditioning amalgamation conditioning
It more combines water and is translated into Free water.
Existing mud dewatering method can be divided into natural drying, four class of heat drying, mechanical dehydration and electric dehydration.It spontaneously dries
Method is that the separation of muddy water is realized using the gravity of mud granule and natural evaporation effect, takes up a large area, occupies to surrounding
The influences such as people's environment are serious.Heat drying technology, which refers to, evaporates moisture in sludge using heating, achievees the effect that mud-water separation, but
Complex process equipment, operation requires and energy consumption is high.Mechanical dehydration such as compresses filtering, gravitational settling, centrifugal action can effectively be gone
Except the Free water of sludge, but Interstitial Water, surface water, hydrated state water are difficult to remove.During the dehydration process, taking off with Free water
It removes, particle can be deposited on filter medium the blocking for leading to medium, influence the further progress of dehydration.Electric dehydration utilizes outer power-up
Enhancing dewatering performance of sludge method, water removing occur each floccule body particle inner and outer surfaces, Interstitial Water and from
It is removed simultaneously by water, grain density equably increases, and can effectively improve dehydration efficiency.
The Chinese patent application of 109665692 A of Publication No. CN discloses a kind of based on Fenton reagent under hydrothermal condition
Aoxidize excess sludge Opsonizing method.This patent is that the excess sludge of certain moisture content and Fenton reagent are input to autoclave
In, reaction temperature, reaction time, initial pH progress hydrothermal oxidization reaction are adjusted, then the sludge after conditioning is dehydrated.This
Patent utilizes two kinds of Strong oxdiative reaction condition co-conditioning sludge, improves the dewatering of sludge, greatly reduces sludge body
Product.But this patent is carried out under high-temperature and high-pressure conditions, not only energy consumption consumption it is larger, but also high temperature often with foul gas, have
It is the problem of malicious tail gas, more dangerous.Fenton reagent will generate hydroxyl radical free radical under conditions of pH < 3, and reaction condition is more severe
It carves, and the subsequent processing for being unfavorable for sludge be easy to cause secondary pollution；And hydrogen peroxide is a kind of liquid with oxidisability,
It is easily decomposes, it is not easy to storage and transport.
The Chinese patent application of 109485229 A of Publication No. CN discloses a kind of sludge deep conditioning dehydration simultaneously time
The method for receiving conditioning activator.This patent is that sludge is first carried out pH conditioning, adds zeroth order iron mixture and hydrogen peroxymonosulfate
Potassium complex salt carries out sludge heat treatment, and treated sludge recycles Zero-valent Iron therein by Magnetic Isolation, improves
Sludge afterwards is dehydrated.This patent is based on free-radical chemistry activation joint thermal activation collaboration conditioning sludge, it can be achieved that activator
Recycling, but the method conditioner use Zero-valent Iron, since Zero-valent Iron has high surface energy, so aerial stabilization
Property it is very poor, and the method needs to add that zeroth order iron is larger, accounts for the 25-27% of mud dry weight, higher cost, and after improving
Dewatering performance of sludge be not fine.
Therefore, the present invention is directed in view of the problems of the existing technology provide a kind of simple reaction condition, stable reagent and
It facilitates storage and transportation, is at low cost, the method for efficient conditioning sludge dewatering without secondary pollution.
Summary of the invention
It, should in order to solve the problems in the prior art, the purpose of the present invention is to providing a kind of method of highly effective sludge conditioning dehydration
Opsonizing method destroys cell inside sludge by ultrasonic treatment sludge.Then on the one hand siderite and mistake are promoted by Thiobacillus
Sulfuric acid reactant salt generates more potentiometric titrations, and Fe (III) can be reduced to Fe (II) by another aspect Thiobacillus, is formed
The redox cycle system of Fe (II) aoxidizes the EPS on sludge wadding body surface while not needing to add more reagents
With it is broken, release a large amount of in conjunction with water of EPS and sludge cell interior so that be converted into Free water in conjunction with water, while with level
Field coupling realizes sludge dewatering.The method reaction condition of sludge conditioning dehydration is simple, reagent facilitates storage and transportation, together
When can effectively reduce moisture percentage in sewage sludge, sludge reduction is realized, convenient for subsequent processing disposition.
In order to achieve the above object, the present invention is main by physics conditioning, sludge pretreatment, chemical conditioning, sludge dewatering etc.
Step is wanted to realize:
(1) physics improves: sludge being ultrasonically treated, is adjusted to suitable supersonic frequency；
(2) temperature of sludge, pH sludge pretreatment: are adjusted to the optimum range to Thiobacillus；
(3) chemical conditioning: adding a certain amount of Thiobacillus, siderite, persulfate into sludge, is uniformly mixed, goes forward side by side
The stirring of row certain time；
(4) sludge dewatering: horizontal component of electric field voltage is adjusted, sludge is carried out dehydrating.
Wherein, sludge conditioning dehydration technique is as shown in Figure 1.
Especially, dewatered sludge to be conditioned described in step is the residual active sludge of municipal sewage plant, digestion
One of sludge or its mixing sludge, moisture content 96.00%-99.99%, preferably 97.50%-98.50%, sludge are dense
Degree is between 18-27g/L, preferably 18-20g/L.
In particular, physics conditioning will adjust suitable supersonic frequency in step (1), frequency is generally 20-100kHz, excellent
Select 5k-10kHz.
In particular, conditioning of mud temperature, pH to Thiobacillus are suitable for the range of existence in step (2), temperature is 15-40 DEG C,
It is preferred that 25-30 DEG C；PH is 5-7, preferably 6-7.
Especially, conditioner described in step (3) is siderite and persulfate, and siderite partial size is in millimeter to micro-
Meter level, preferably 0.5-1.0mm, dosage are 0.05-0.2g/g TSS, preferably 0.05-0.1g/g TSS；Persulfate is preferably
One or two kinds of cooperations in potassium peroxydisulfate or potassium hydrogen persulfate are crossed, dosage is 0.2-0.4g/g TSS, preferably 0.2-0.3g/g
TSS。
In particular, the Thiobacillus added in sludge, siderite, persulfate are mixed in step (3), mixing time
For 30-60min, preferably 30-40min.
Especially, sludge electric dehydration described in step (4), horizontal DC voltage of electric field virtual value set 20-60V, preferably
For 20-40V；The electric field dehydration time is arranged in 0.5-5h, preferably 2-3h.
Mud dewatering method of the invention has the advantages that
1. sludge conditioning dewatering of the invention is the method for a kind of joint physics conditioning and chemical conditioning, can be abundant
The advantage for playing two kinds of conditionings, realizes the deep dehydration of sludge.Firstly, physics conditioning destroys eucaryotic cell structure inside sludge, then
It carries out chemical conditioning and promotes siderite to react with persulfate by Thiobacillus, generate more potentiometric titrations, crack dirt
Mud cell further discharges cell interior part and combines water, and is converted into Free water.Secondly, under horizontal component of electric field effect, it will be dirty
The moisture removal that mud releases improves dehydrating effect.
2. sludge conditioning method of the invention can be by Fe in siderite2+It releases, gives full play to the value of siderite,
The redox cycle system of Fe (II) is formed, reagent is saved.
3. sludge conditioning process reaction mild condition of the present invention and applied widely, the sludge for being 80% or more to moisture content
It is all suitable for.
4. the material properties that sludge conditioning process of the present invention uses is stable, facilitates storage, is without secondary pollution.
5. medicament used in sludge conditioning process of the present invention is solid chemicals, solid powder is direct plungeed into when adding,
It is simple and convenient without wiring solution-forming.
6. in the present invention sludge dehydration process use horizontal component of electric field, can make sludge remove under electroosmosis Free water with
Part combines water, easy to operate, effect stability.
Detailed description of the invention
Fig. 1 is sludge conditioning dehydration technique route map of the present invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments:
Embodiment 1:
The sewage treatment plant in sludge acquisition to be drained off Mr. Yu city, the sewage treatment plant use traditional activated sludge process technique pair
Municipal wastewater is handled.Activated sludge collection point is located at somewhere on secondary settling tank to aeration tank reflux section.Sludge concentration
(MLSS) reach 20.0g/L, moisture content 97.328%, temperature and pH value are respectively 25 DEG C and 6.5.
1) 300mL activated sludge is taken to be placed in a beaker；
2) the ultrasonication 5min for being 1k-5kHz by sludge frequency of use；
3) mistake of the Thiobacillus of 0.02g/g TSS and the siderite of 0.05g/gTSS and 0.10g/gTSS is added into sludge
Potassium acid sulfate is opened mechanical agitator, is stirred to sludge, then stirring intensity 100r/min persistently stirs 30min；
4) sludge after conditioning is subjected to gravitational settling, is then discharged out filtrate；
5) DC power supply is opened, dehydration voltage effective value is set as 20V, control dewatering time is 2h.Collect reaction knot
Sludge in pond is dehydrated after beam, with its moisture content of gravimetric detemination.
Measurement result is as shown in table 1.
Embodiment 2:
The sewage treatment plant in sludge acquisition to be drained off Mr. Yu city, the sewage treatment plant use traditional activated sludge process technique pair
Municipal wastewater is handled.Activated sludge collection point is located at somewhere on secondary settling tank to aeration tank reflux section.Sludge concentration
(MLSS) reach 20.0g/L, moisture content 97.330%, temperature and pH value are respectively 25 DEG C and 6.5.
1) 300mL activated sludge is taken to be placed in a beaker；
2) the ultrasonication 25min for being 8k-10kHz by sludge frequency of use；
3) mistake of the Thiobacillus of 0.04g/g TSS and the siderite of 0.10g/gTSS and 0.20g/gTSS is added into sludge
Potassium acid sulfate is opened mechanical agitator, is stirred to sludge, then stirring intensity 100r/min persistently stirs 10min；
4) sludge after conditioning is subjected to gravitational settling, is then discharged out filtrate；
5) DC power supply is opened, dehydration voltage effective value is set as 30V, control dewatering time is 2h.Collect reaction knot
Sludge in pond is dehydrated after beam, with its moisture content of gravimetric detemination.
Measurement result is as shown in table 1.
Embodiment 3:
The sewage treatment plant in sludge acquisition to be drained off Mr. Yu city, the sewage treatment plant use traditional activated sludge process technique pair
Municipal wastewater is handled.Activated sludge collection point is located at somewhere on secondary settling tank to aeration tank reflux section.Sludge concentration
(MLSS) reach 20.0g/L, moisture content 97.322%, temperature and pH value are respectively 25 DEG C and 6.5.
1) 300mL activated sludge is taken to be placed in a beaker；
2) the ultrasonication 5min for being 1k-5kHz by sludge frequency of use；
3) mistake of the Thiobacillus of 0.02g/g TSS and the siderite of 0.10g/gTSS and 0.20g/gTSS is added into sludge
Potassium acid sulfate is opened mechanical agitator, is stirred to sludge, then stirring intensity 100r/min persistently stirs 30min；
4) sludge after conditioning is subjected to gravitational settling, is then discharged out filtrate；
5) DC power supply is opened, dehydration voltage effective value is set as 40V, control dewatering time is 3h.Collect reaction knot
Sludge in pond is dehydrated after beam, with its moisture content of gravimetric detemination.
Measurement result is as shown in table 1.
Embodiment 4:
The sewage treatment plant in sludge acquisition to be drained off Mr. Yu city, the sewage treatment plant use traditional activated sludge process technique pair
Municipal wastewater is handled.Activated sludge collection point is located at somewhere on secondary settling tank to aeration tank reflux section.Sludge concentration
(MLSS) reach 20.0g/L, temperature and pH value are respectively 25 DEG C and 6.5.
1) 300mL activated sludge is taken to be placed in a beaker；
2) the ultrasonication 5min for being 5k-8kHz by sludge frequency of use；
3) mistake of the Thiobacillus of 0.06g/g TSS and the siderite of 0.05g/gTSS and 0.10g/gTSS is added into sludge
Potassium acid sulfate is opened mechanical agitator, is stirred to sludge, then stirring intensity 100r/min persistently stirs 30min；
4) sludge after conditioning is subjected to gravitational settling, is then discharged out filtrate；
5) DC power supply is opened, dehydration voltage effective value is set as 40V, control dewatering time is 3h.Collect reaction knot
Sludge in pond is dehydrated after beam, with its moisture content of gravimetric detemination.
Measurement result is as shown in table 1.
Embodiment 5:
The sewage treatment plant in sludge acquisition to be drained off Mr. Yu city, the sewage treatment plant use traditional activated sludge process technique pair
Municipal wastewater is handled.Activated sludge collection point is located at somewhere on secondary settling tank to aeration tank reflux section.Sludge concentration
(MLSS) reach 20.0g/L, moisture content 97.328%, temperature and pH value are respectively 25 DEG C and 6.5.
1) 300mL activated sludge is taken to be placed in a beaker；
2) the ultrasonication 25min for being 5k-8kHz by sludge frequency of use；
3) mistake of the Thiobacillus of 0.04g/g TSS and the siderite of 0.10g/gTSS and 0.20g/gTSS is added into sludge
Potassium acid sulfate is opened mechanical agitator, is stirred to sludge, then stirring intensity 100r/min persistently stirs 30min；
4) sludge after conditioning is subjected to gravitational settling, is then discharged out filtrate；
5) DC power supply is opened, dehydration voltage effective value is set as 30V, control dewatering time is 2h.Collect reaction knot
Sludge in pond is dehydrated after beam, with its moisture content of gravimetric detemination.
Measurement result is as shown in table 1.
Embodiment 6:
The sewage treatment plant in sludge acquisition to be drained off Mr. Yu city, the sewage treatment plant use traditional activated sludge process technique pair
Municipal wastewater is handled.Activated sludge collection point is located at somewhere on secondary settling tank to aeration tank reflux section.Sludge concentration
(MLSS) reach 20.0g/L, moisture content 97.329%, temperature and pH value are respectively 25 DEG C and 6.5.
1) 300mL activated sludge is taken to be placed in a beaker；
2) the ultrasonication 25min for being 8k-10kHz by sludge frequency of use；
3) mistake of the Thiobacillus of 0.02g/g TSS and the siderite of 0.05g/gTSS and 0.10g/gTSS is added into sludge
Potassium acid sulfate is opened mechanical agitator, is stirred to sludge, then stirring intensity 100r/min persistently stirs 10min；
4) sludge after conditioning is subjected to gravitational settling, is then discharged out filtrate；
5) DC power supply is opened, dehydration voltage effective value is set as 30V, control dewatering time is 2h.Collect reaction knot
Sludge in pond is dehydrated after beam, with its moisture content of gravimetric detemination.
Measurement result is as shown in table 1.
Case of comparative examples 1:
Except ultrasonic treatment time is 25min, remaining is identical as embodiment 1.
Case of comparative examples 2:
Except ultrasonic frequency is 5k-8kHz, remaining is identical as embodiment 2.
Case of comparative examples 3:
Except chemical conditioning mixing time is 10min, remaining is identical as embodiment 3.
Case of comparative examples 4:
Except dewatering time is set as 2h, remaining is identical as embodiment 4.
Case of comparative examples 5:
Except Thiobacillus dosage is 0.02g/g TSS, remaining is identical as embodiment 5.
Case of comparative examples 6:
Except Thiobacillus dosage is 0.04g/g TSS, remaining is identical as embodiment 6.
The sludge dewatering effect of the present invention of table 1
| Primary sludge moisture content (%) | Dehydrated sludge moisture content (%) | |
| Embodiment 1 | 97.328 | 68.637 |
| Embodiment 2 | 97.330 | 65.328 |
| Embodiment 3 | 97.322 | 67.554 |
| Embodiment 4 | 97.327 | 66.325 |
| Embodiment 5 | 97.328 | 63.462 |
| Embodiment 6 | 97.329 | 66.879 |
| Case of comparative examples 1 | 97.328 | 67.027 |
| Case of comparative examples 2 | 97.330 | 64.864 |
| Case of comparative examples 3 | 97.322 | 68.137 |
| Case of comparative examples 4 | 97.327 | 67.013 |
| Case of comparative examples 5 | 97.328 | 62.968 |
| Case of comparative examples 6 | 97.329 | 65.975 |
Testing result shows:
It is dehydrated 1. pair sludge carries out ultrasonic conditioning-Thiobacillus/siderite/persulfate conditioning combined level electric field,
It can effectively reduce moisture percentage in sewage sludge；
2. the dosage of conditioner increases during sludge conditioning, dehydration efficiency is improved；
3. it is advantageous to sludge dewatering effect to increase mixing time during sludge conditioning；
4. extending the electric field dehydration time, increasing supply voltage can effectively reduce moisture percentage in sewage sludge；
5. it is advantageous to sludge dewatering effect to extend ultrasonic time；
6. changing supersonic frequency to have an impact to sludge dewatering effect, but excessive supersonic frequency may result in dehydrating effect
It is deteriorated；
7. the dosage for increasing microbial inoculum has an impact to sludge dewatering effect, but excessive microbial inoculum dosage can make dehydrating effect
It is deteriorated.
Claims (9)
1. a kind of sludge conditioning and the method for dehydration, it is characterised in that combining ultrasonic cracks and Thiobacillus-siderite-persulfate
Oxidation improves sludge, then carries out the operation of sludge electric dehydration；On the one hand Thiobacillus promotes siderite and persulfate anti-
It answers, excites the generation of potentiometric titrations, Fe (III) can be reduced to Fe (II) by another aspect Thiobacillus, form Fe (II)
Redox cycle system saves chemical reagent dosage；Ultrasound strengthens the above process, realizes the degradation of sludge EPS
With the rupture of cell, combination water therein is converted into Free water, improves sludge electric dehydration effect.
2. the method as described in claim 1, it is characterised in that sludge is dirty using the excess sludge of municipal sewage plant, digestion
Or mixtures thereof one of mud, moisture content 96.00%-99.99%, sludge concentration 18-27g/L.
3. the method as described in claim 1, it is characterised in that include the following steps:
(1) sludge is ultrasonically treated；
(2) temperature of sludge, pH are adjusted to the optimum range to Thiobacillus；
(3) a certain amount of Thiobacillus, siderite, persulfate are added into sludge, and carry out the stirring of certain time；
(4) by the sludge gravitational settling after conditioning, filtrate is discharged；
(5) power supply is opened, horizontal component of electric field voltage is adjusted, sludge is carried out dehydrating.
4. step (1) as claimed in claim 3, it is characterised in that the ultrasonication sludge 30- of frequency of use 20-100kHz
60min。
5. step (2) as claimed in claim 3, it is characterised in that the optimum range of Thiobacillus is as follows: temperature be 15-40 DEG C,
PH is 5-7.
6. step (3) as claimed in claim 3, it is characterised in that improve the Thiobacillus added in the process, siderite, persulfuric acid
Salt, Thiobacillus dosage are 0.02-0.10g/g TSS；Using the particle of millimeter to micron-scale, dosage is siderite
0.05-0.2g/g TSS；The dosage of persulfate is 0.2-0.4g/g TSS.
7. step (3) as claimed in claim 3, it is characterised in that churned mechanically revolving speed is set as 100-400r/min, stirs
Mixing the time is 30-60min.
8. step (5) as claimed in claim 3, it is characterised in that the supply voltage of horizontal component of electric field dehydration is set as 20-60V,
Dewatering time is 0.5-5h.
9. sludge conditioning dewatering as claimed in claim 3, it is characterised in that the moisture content of dehydrated sludge is up to 50-
70%.
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| CN112551843A (en) * | 2020-12-16 | 2021-03-26 | 太原理工大学 | Method for improving sludge dewatering performance by combining bioleaching and ultrasonic |
| CN117342776A (en) * | 2023-12-04 | 2024-01-05 | 中煤科工集团杭州研究院有限公司 | Sludge composite conditioning and deep dewatering method |
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| CN112028423A (en) * | 2020-09-03 | 2020-12-04 | 江苏江达生态环境科技有限公司 | Method for treating river and lake substrate sediment floating |
| CN112551843A (en) * | 2020-12-16 | 2021-03-26 | 太原理工大学 | Method for improving sludge dewatering performance by combining bioleaching and ultrasonic |
| CN117342776A (en) * | 2023-12-04 | 2024-01-05 | 中煤科工集团杭州研究院有限公司 | Sludge composite conditioning and deep dewatering method |
| CN117342776B (en) * | 2023-12-04 | 2024-03-19 | 中煤科工集团杭州研究院有限公司 | Sludge composite conditioning and deep dewatering method |
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