CN106430890A - Sludge dewatering method for reduction - Google Patents
Sludge dewatering method for reduction Download PDFInfo
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- CN106430890A CN106430890A CN201610950801.3A CN201610950801A CN106430890A CN 106430890 A CN106430890 A CN 106430890A CN 201610950801 A CN201610950801 A CN 201610950801A CN 106430890 A CN106430890 A CN 106430890A
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- mud
- dewatering method
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Classifications
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a sludge dewatering method for reduction. The sludge dewatering method comprises the following steps: sequentially adding an oxidant, a conditioning agent and an auxiliary to to-be-treated sludge; then centrifuging and filter-pressing to obtain sludge subjected to deep dewatering treatment. According to the sludge dewatering method provided by the invention, moisture in a microbiological body and moisture combined in chemical bonds are removed; through adding the oxidant, the chemical bonds of macro-molecular organic matters in the sludge are broken, so that micro-molecular matters easily dissolved in water or easily separated are formed; through adding the conditioning agent, the system surface tension and the electric charge characteristics are reduced, so that the micro-molecular matters are more easily removed in the subsequent centrifuging and press-filtering processes; through adding the auxiliary, not only is a channel provided for removal of the moisture in the sludge, but also the matter decomposition is promoted.
Description
Technical field
The present invention relates to a kind of dewatering, more particularly to a kind of mud dewatering method of minimizing.
Background technology
Mud is the product of sewage disposal, is mainly derived from the process procedures such as primary sedimentation pond, secondary sedimentation tank.Due to richness
Containing the compositions such as Organic substance, microorganism, colloid, every ten thousand m3Mud yield (based on moisture content 80%) is general about after treatment for sewage
For 5-10t.2011, firmly build portion and the Committee of Development and Reform combines issue《Urban wastewater treatment firm specific resistance to filtration technical manual》In
Point out, China's sludge treatment should meet the requirement of " stabilisation, minimizing and harmless treatment ".Due to moisture content height (90-
99%), yield is huge, and China's sludge treatment ability faces major test.Therefore, how deep the primary problem of Treatment of Sludge is
Degree dehydration and yield decrement.
In mud, water can be followed successively by Free water, capillary water according to different bond strength is ascending, and surface water, in conjunction with water
(comprising chemical bonding water, derivatized polymers irreducible water and intracellular water).Mechanical dehydration can only remove most freedom
Water, and capillary water, surface water, then could can only remove after specific process is processed in conjunction with water.At present, mud decrement processing mode
There are the treatment technologies such as anaerobic digestion, aerobic fermentation, hydro-thermal method.However, the mud after anaerobic digestion, aerobic fermentation process is still deposited
In problems with：1. mud storage is still larger.2. moisture percentage in sewage sludge still up to more than 84%, and be difficult to continue with conventional method
Continuous removing moisture.Hydro-thermal method disposing sludge need to be carried out with special hydrothermal device in the range of higher temperature (160-180 DEG C),
Can not under room temperature, normal condition advanced treating mud.Therefore, exploitation one kind can have notable under room temperature, normal condition
The deeply dehydrating sludge processing method of minimizing is imperative.
Based on above-mentioned present situation, the sludge deep that exploitation one kind under room temperature, normal condition, can have notable minimizing takes off
Method for treating water is imperative.
Content of the invention
Present invention is primarily targeted at, a kind of mud dewatering method of minimizing, technical problem to be solved are provided
It is the water content reducing in mud, reduce the quality of mud, thus more suitable for practicality simultaneously.
The object of the invention to solve the technical problems employs the following technical solutions to realize.
According to a kind of mud dewatering method of minimizing proposed by the present invention, including, step one, add oxidation in mud
Agent；Step 2, the addition conditioner in mud, and the pH value of conditioning of mud are surfactant to 1-7, described conditioner
And/or coagulant；Step 3, adds auxiliary agent in mud；Centrifugation, filter pressing, obtain the mud after deep dehydration is processed.The present invention
Described auxiliary agent, has specific molecular structure, can form framing structure in mud, and the outflow for moisture provides passage.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, before step one, calculates the dry basis in mud
Amount A, described butt weight A deducts the weight of moisture in mud equal to mud gross weight.The test of the weight of described moisture,
By the mud foundation after processing《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) in, moisture percentage in sewage sludge is surveyed
Examination is carried out.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, the addition of wherein said oxidant is 50-
600%A.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, wherein said oxidant is hydrogen peroxide or Gao Meng
Sour potassium.
Preferably, a kind of mud dewatering method of aforesaid minimizing, described hydrogen peroxide is configured to percent mass and contains
Measure and add for after the aqueous hydrogen peroxide solution of 5-30%.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, the addition of wherein said conditioner is 1-6%
A.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, wherein said surfactant for conditioner is
Cetyl trimethylammonium bromide and/or octadecyl dimethyl benzyl aliquat, described coagulant is polyacrylamide
Amine.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, the addition of wherein said auxiliary agent is 5-20%
A.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, wherein said auxiliary agent is calcium oxide and/or chlorination
Calcium.
Preferably, the mud dewatering method of aforesaid a kind of minimizing, the pressure of wherein said pressure-filtering process is 1-
3kg/cm2.
By technique scheme, a kind of mud dewatering method of minimizing of the present invention at least has following advantages：
1st, achieve the purpose to deeply dehydrating sludge.
The composition such as larger molecular organicses, microorganism, colloid is contained, the present invention passes through successively in pending mud in mud
Add oxidant, conditioner and auxiliary agent, the moisture making the moisture in microbial body and being incorporated in chemical bond is changed into being more easy to remove
Free water, and the addition of auxiliary agent, is that the flowing of moisture in mud provides passage, advantageously outflows in moisture, realizes
The purpose of deep dehydration.
2nd, during deeply dehydrating sludge, reached the purpose of sludge reduction.
The addition of oxidant, makes the chemical bond rupture of the larger molecular organicses in mud, becomes soluble in water or easily separated
Small-molecule substance；The addition of conditioner, reduces system surface tension and charge characteristic so that small-molecule substance is more prone to
In follow-up centrifugation, pressure-filtering process removing；The addition of auxiliary agent, only in mud, the removing of moisture does not provide passage, also promotes
Substance decomposition.Oxidant, conditioner and auxiliary agent using it is achieved that the purpose of mud decrement；On this basis, it is centrifuged and press
Filter can remove unnecessary moisture further it is achieved that the deep dehydration of mud is processed.
3rd, the mud after processed of the present invention, advantageously in the protection to soil environment.
In mud dewatering method of the present invention, due to the addition of oxidant, intractable macromole in mud is made to become
Decompose or diffluent small molecule for easy, meanwhile, moisture is less than 60%, be more applicable for agricultural application.Modern crops
In production, due to the administration of a large amount of chemical fertilizer, pesticide, in soil, remain the substantial amounts of macromolecular organic compound being difficult to and decomposing,
The presence of these compounds, have impact on the Quantityanddiversity of Soil Microorganism, reduces the environmental quality of soil.This
Bright, by the larger molecular organicses of difficult degradation in mud in the presence of oxidant, it is oxidized to soluble in water or labile little point
Sub- material, wherein, small-molecule substance soluble in water, discharge with follow-up processed；Labile small-molecule substance, easily quilt
Microbial decomposition in soil utilizes.Therefore, the mud after present invention process, is either used for agricultural shale, or warp
Landfill disposal, all advantageously in the protection to soil environment.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, after being described in detail such as with presently preferred embodiments of the present invention below.
Specific embodiment
For further illustrating that the present invention is to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Preferred embodiment, to according to a kind of mud dewatering method of minimizing proposed by the present invention, its specific embodiment, structure, spy
Levy and its effect, after describing in detail such as.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily same
One embodiment.Additionally, special characteristic in one or more embodiments, structure or feature can be combined by any suitable form.
A kind of mud dewatering method of minimizing of the present invention, including, step one, add oxidant in mud；Step 2,
Add conditioner in mud, and the pH value of conditioning of mud is to 1-7, described conditioner is surfactant and/or coagulant；
Step 3, adds auxiliary agent in mud；Centrifugation, filter pressing, obtain the mud after deep dehydration is processed.
The composition such as larger molecular organicses, microorganism, colloid is contained in mud.The invention provides a kind of sludge deep takes off
Water, and make the processing method of mud decrement, the wherein addition of (1) oxidant, on the one hand make the larger molecular organicses in mud
Chemical bond rupture, become soluble in water or segregative small-molecule substance, in follow-up centrifugation and pressure-filtering process remove, reach
Purpose to decrement；On the other hand, oxidant makes the membranolysises of microorganism in mud, makes to be incorporated in microbial cell
Moisture flows out, and is changed into the Free water being more easy to remove, and then eliminates the moisture in microorganism.(2) contain substantial amounts ofization in mud
Learn and combine water, derivatized polymers irreducible water, the addition of conditioner, make the chemical bonding water in mud and irreducible water disengagingization
Learn key and cancellated constraint, make point in the little hydrone cohesion in mud it is easy to outflow from mud.(3) auxiliary agent
The mud that is incorporated as provide specific supporting structure, be that the outflow of moisture in mud provides passage.To change mud electric charge
Characteristic and the oxidizing effect of enhancing, improve dewatering performance of sludge.
Further, before step one, calculate butt weight A in mud, described butt weight A is mud gross weight
The weight of surplus materialss after the moisture weight that amount deducts in mud.
Oxidant, conditioner and auxiliary agent, mainly act on the dry matter in mud, therefore, calculate butt thing in mud
The weight of matter, is conducive to determining that the optimal addn of oxidant, conditioner and auxiliary agent is so as to play one's part to the full and unlikely
In waste of resource.
Further, the addition of described oxidant is 50-600%A.
The addition of oxidant, on the one hand, make the chemical bond rupture of larger molecular organicses in butt, on the other hand, makes butt
The membranolysises of middle microorganism.Simultaneously act on two kinds of materials in butt due to oxidant, and both materials dry
Content in base is larger, therefore, the addition not preferably less than 50%A of oxidant, otherwise oxidation and bactericidal effect be not thorough, and then
Impact dehydration and the effect of decrement；And, the addition of oxidant is not preferably greater than 600%A, otherwise, remaining oxidant increases
Follow-up centrifugation and the load of pressure-filtering process, and, the conditioner that subsequently adds can be made to lose effect, and then affect the effect of dehydration
Really.
Further, described oxidant is hydrogen peroxide or potassium permanganate.
The oxidisability of hydrogen peroxide is strong, can be with the larger molecular organicses in oxidized sludge so as to chemical bond rupture；And, it is double
Oxygen water has bactericidal effect, can destroy the cell membrane of microorganism in mud, makes to flow out with reference to the water in microbial cell, becomes
For the Free water that can slough；Furthermore, the structural formula of hydrogen peroxide is H2O2, simply, the post-oxidation product of generation is water to structural formula
And oxygen, do not have impurity to generate.Because the addition of oxidant is larger, it is the 50-600%A of butt mud, if oxidant is in oxygen
Generate impurity during change, then increase burden for the removal of follow-up impurity.
Further, hydrogen peroxide is made and add after the aqueous hydrogen peroxide solution that weight/mass percentage composition is 5-30%.
Hydrogen peroxide is viscous liquid, is directly added into the larger aqueous hydrogen peroxide solution of concentration although the extra moisture adding
Few, but due to the big characteristic of its viscosity, it is not easy to quick in mud, dispersed, meanwhile, mud also has certain gluing
Degree, therefore, need to adjust the concentration of the aqueous hydrogen peroxide solution of addition, further to coordinate hydrogen peroxide finely dispersed speed in mud
Rate and external adding water divide between relation.The concentration of aqueous hydrogen peroxide solution of the present invention preferably less than 5%, otherwise additional excess moisture,
Increase burden for follow-up dehydration；In addition, the concentration of hydrogen peroxide is not preferably greater than 30%, otherwise, the viscosity of hydrogen peroxide is excessive, is unfavorable for
Its rapid dispersion in mud.
Further, the mud after above-mentioned oxidation processes is carried out heat treated under the conditions of 65-80 DEG C.
Larger molecular organicses and microbe species are more it is impossible to concrete calculate in mud, it usually needs add partial oxidation
Agent is so as to oxidation effectiveness is complete, but remaining unreacted oxidant can affect the performance of the effect of the conditioner subsequently adding, because
This, need to carry out heat treated, so that unnecessary oxidant is decomposed.
Further, the addition of described conditioner is 1-6%A.
The addition of conditioner of the present invention, can improve the charge characteristic of surface tension within mud and molecule, further
Make chemical bonding water in mud and irreducible water departs from chemical bond and cancellated constraint so as in follow-up dry run
Remove, however, it is desirable to strictly control the addition of conditioner, otherwise in whipping process, easily produce bubble, take off for follow-up
Water process is more difficult.
Further, described surfactant is cetyl trimethylammonium bromide and/or octadecyldimethyl benzyl
Base aliquat, described coagulant is polyacrylamide.
Further, the addition of described auxiliary agent is 5-20%A.
Auxiliary agent of the present invention, can be as support, be dispersed in irregular mud, this support effect, be
The outflow of moisture provides specific passage, is conducive to follow-up processed.
Further, described auxiliary agent is calcium oxide and/or calcium chloride.
Selective oxidation calcium is as auxiliary agent, on the one hand, it has stronger water sorption, can absorb the part water in mud
Point, it is changed into the calcium hydroxide with specific framing structure, because in now mud, moisture is larger, and the addition of calcium oxide
Less, so in the case that moisture is more, calcium hydroxide will not lump, only it is dissolved in mud, as support, and,
Follow-up heat treated, makes calcium hydroxide decompose, sloughs that portion of water of its absorption；Calcium chloride in the presence of water,
Generate calcium chloride dihydrate, it may have specific framing structure, and, in a heated condition, easily combination water therein is removed.
Further, the pressure of described pressure-filtering process is 1-3kg/cm2.
Filter pressing under having certain pressure condition, can improve the efficiency of filter pressing, but the pressure of pressure-filtering process of the present invention
Unsuitable excessive, otherwise can destroy skeleton framework therein, make pressure-filtering process not thorough.
The present invention is applied to the institutes such as mud, river and lake silt and other bed muds containing organic matter or microorganism of sewage treatment plant
Have containing can be described by the present invention oxidizing molecule or microorganism mud.
Embodiment 1
(Beijing Qinghe is dirty to take wet basis mud 23.0139g (moisture content 84.855%, after butt conversion, weight is 3.4855g)
Water treatment plant's mud, (quality of oxidant is butt quality to add the aqueous hydrogen peroxide solution that 70g mass fraction is 10%
200%), after magnetic agitation 30min, obtain the first mixture.
Again, add conditioner cetyl trimethylammonium bromide (the CTAB) (conditioner of 0.07g in the first mixture
Quality be the 2% of butt quality), pH=5.8 is adjusted by the NaOH solution of the HCl solution of 2mol/L and 2mol/L, in magnetic force
After stirring 30min, obtain the second mixture.
Afterwards, add the auxiliary agent calcium oxide (quality of auxiliary agent is the 20% of butt quality) of 0.7g in the second mixture,
After magnetic agitation 30min, obtain the 3rd mixture.By the 3rd mixture through centrifugation, in 2kg/cm2Pressure under filter pressing
Mud after 10min, after being processed；Dry in the baking oven again mud after processing being inserted 100-105 DEG C and contained with testing it
Water rate.
Test result shows, the present embodiment sludge quality cut rate α=69.08%, and mud achieves at significant minimizing
Reason.Moisture percentage in sewage sludge is 53.83%, and compared with before processing 84.855%, moisture content has been greatly lowered it is sufficient to meet agricultural shale
The requirement of moisture content≤60%.
Embodiment 2
(Beijing Qinghe is dirty to take wet basis mud 34.7834g (moisture content 84.855%, after butt conversion, weight is 5.2679g)
Water treatment plant's mud), (quality of oxidant is butt quality to add the aqueous hydrogen peroxide solution that 106g mass fraction is 10%
200%), after magnetic agitation 30min, obtain the first mixture.
Again, add conditioner cetyl trimethylammonium bromide (the CTAB) (conditioner of 0.05g in the first mixture
Quality be the 1% of butt quality), pH=4 is adjusted by the NaOH solution of the HCl solution of 2mol/L and 2mol/L, stirs in magnetic force
After mixing 30min, obtain the second mixture.
Afterwards, add the auxiliary agent calcium oxide (quality of auxiliary agent is the 5% of butt quality) of 0.26g in the second mixture,
After magnetic agitation 30min, obtain the 3rd mixture.By the 3rd mixture through centrifugation, in 2kg/cm2Pressure under filter pressing
Mud after 10min, after being processed；Dry in the baking oven again mud after processing being inserted 100-105 DEG C and contained with testing it
Water rate.
Test result shows, the present embodiment sludge quality cut rate α=82.16%, and mud achieves at significant minimizing
Reason.Moisture percentage in sewage sludge is 54.75%, and compared with before processing 84.855%, moisture content is greatly lowered.
Embodiment 3
(Beijing Qinghe is dirty to take wet basis mud 27.7461g (moisture content 84.855%, after butt conversion, weight is 4.2021g)
Water treatment plant's mud), (quality of oxidant is butt quality to add the aqueous hydrogen peroxide solution that 168g mass fraction is 10%
400%), after magnetic agitation 30min, obtain the first mixture.
Again, add conditioner cetyl trimethylammonium bromide (the CTAB) (conditioner of 0.17g in the first mixture
Quality be the 4% of butt quality), pH=4 is adjusted by the NaOH solution of the HCl solution of 2mol/L and 2mol/L, stirs in magnetic force
After mixing 30min, obtain the second mixture.
Afterwards, add the auxiliary agent calcium oxide (quality of auxiliary agent is the 20% of butt quality) of 0.84g in the second mixture,
After magnetic agitation 30min, obtain the 3rd mixture.By the 3rd mixture through centrifugation, in 2kg/cm2Pressure under filter pressing
Mud after 10min, after being processed；Dry in the baking oven again mud after processing being inserted 100-105 DEG C and contained with testing it
Water rate.
Test result shows, the present embodiment sludge quality cut rate α=81.23%, and mud achieves at significant minimizing
Reason.Moisture percentage in sewage sludge is 59.28%, and compared with before processing 84.855%, moisture content is greatly lowered.
Heretofore described numerical range includes all of numerical value in the range of this, and includes any two in the range of this
The value range of numerical value composition.For example, " addition of conditioner is 1%-6%A ", this numerical range includes institute between 1%-6%A
Some numerical value, and include in the range of this any two numerical value (for example：2%A, 3%A) value range (2%-3%A) that forms；
The different numerical value of the same index occurring in all embodiments of the invention, can in any combination, compositing range value.
The above, be only presently preferred embodiments of the present invention, and not the present invention is made with any pro forma restriction, according to
Any simple modification, equivalent variations and modification above example made according to the technical spirit of the present invention, all still falls within this
In the range of bright technical scheme.
Claims (10)
1. a kind of mud dewatering method of minimizing it is characterised in that：Including,
Step one, adds oxidant in mud；
Step 2, the addition conditioner in mud, and the pH value of conditioning of mud are surfactant to 1-7, described conditioner
And/or coagulant；
Step 3, adds auxiliary agent in mud；
Centrifugation, filter pressing, obtain the mud after deep dehydration is processed.
2. a kind of minimizing according to claim 1 mud dewatering method it is characterised in that：Also include,
Before step one, calculate butt weight A in mud,
Described butt weight A deducts the weight of moisture in mud equal to mud gross weight.
3. a kind of minimizing according to claim 1 mud dewatering method it is characterised in that：
The addition of described oxidant is 50-600%A.
4. a kind of minimizing according to claim 1 or 3 mud dewatering method it is characterised in that：
Described oxidant is hydrogen peroxide or potassium permanganate.
5. a kind of minimizing according to claim 4 mud dewatering method it is characterised in that：
Described hydrogen peroxide is configured to after the aqueous hydrogen peroxide solution that weight/mass percentage composition is 5-30% add.
6. a kind of minimizing according to claim 1 mud dewatering method it is characterised in that：
The addition of described conditioner is 1-6%A.
7. a kind of minimizing according to claim 1 or 6 mud dewatering method it is characterised in that：
Described surfactant is cetyl trimethylammonium bromide and/or octadecyl dimethyl benzyl aliquat,
Described coagulant is polyacrylamide.
8. a kind of minimizing according to claim 1 mud dewatering method it is characterised in that：
The addition of described auxiliary agent is 5-20%A.
9. a kind of minimizing according to claim 1 or 8 mud dewatering method it is characterised in that：
Described auxiliary agent is calcium oxide and/or calcium chloride.
10. a kind of minimizing according to claim 1 mud dewatering method it is characterised in that：
The pressure of described pressure-filtering process is 1-3kg/cm2.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107082545A (en) * | 2017-05-23 | 2017-08-22 | 北京首创污泥处置技术股份有限公司 | A kind of conditioner for improving anaerobic sludge digestion efficiency |
| CN107285604A (en) * | 2017-08-18 | 2017-10-24 | 河海大学 | A kind of dense mud consolidated depth dewatering of selective oxidation |
| CN108191184A (en) * | 2018-01-29 | 2018-06-22 | 江苏丰源环保科技工程有限公司 | A kind of sludge chemical deodorizing method |
| CN108439765A (en) * | 2018-04-19 | 2018-08-24 | 北京林业大学 | A method of strengthening lysozyme and improves sludge |
| CN109111080A (en) * | 2018-08-01 | 2019-01-01 | 华南理工大学 | A kind of cation montmorillonite type sludge dehydrating agent and its preparation method and application |
| CN109574459A (en) * | 2018-12-14 | 2019-04-05 | 上海交通大学 | Improve the method for dewatering performance of sludge using segmentation microbubble ozone and surfactant co-conditioning |
| CN109574446A (en) * | 2018-12-14 | 2019-04-05 | 上海交通大学 | A method of improving dewatering performance of sludge using ozone/coagulant/hydrophobic polyurethane |
| CN113003913A (en) * | 2021-01-28 | 2021-06-22 | 河海大学 | Method and equipment for two-stage integrated deep dehydration of municipal sludge |
| CN113024079A (en) * | 2021-04-20 | 2021-06-25 | 惠州市鑫隆环境服务有限公司 | Sludge conditioning system and method thereof |
| CN114514214A (en) * | 2019-09-15 | 2022-05-17 | 宝勒清洁科技有限公司 | Organic mineral fertilizer and production method thereof |
| CN115010344A (en) * | 2022-06-24 | 2022-09-06 | 昭仕（厦门）新材料有限公司 | Sludge dehydrating agent and application method thereof in sludge dehydrating |
| CN115925208A (en) * | 2022-11-07 | 2023-04-07 | 镇江市规划勘测设计集团有限公司 | High-water-content waste slurry dehydration method based on controllable skeleton effect and preparation method of high-strength brick |
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