CN109502950A - A kind for the treatment of process of sludge dewatering - Google Patents
A kind for the treatment of process of sludge dewatering Download PDFInfo
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- CN109502950A CN109502950A CN201811139641.XA CN201811139641A CN109502950A CN 109502950 A CN109502950 A CN 109502950A CN 201811139641 A CN201811139641 A CN 201811139641A CN 109502950 A CN109502950 A CN 109502950A
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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
- C02F11/14—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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind for the treatment of process of sludge dewatering comprising following steps: water-containing sludge is stirred evenly；It to water-containing sludge addition flocculant after mixing evenly and stirs, water-containing sludge and flocculant is made to carry out flocculation reaction；Gravity concentration processing is carried out to the water-containing sludge after flocculation treatment；It to the water-containing sludge addition flocculation aid after gravity concentration and stirs, is condensed water-containing sludge with flocculation aid and reacts；Filters pressing processing is carried out to the water-containing sludge after hybrid reaction；By filters pressing, treated that water-containing sludge is input to sludge discharging machine is dehydrated, and dewatered mud cake is discharged.The treatment process of sludge dewatering of the present invention has high efficiency dredging, reduces secondary environmental pollution risk, the high advantage of dewatering rate.
Description
Technical field
The present invention relates to technical field of sewage, more particularly to a kind for the treatment of process of sludge dewatering.
Background technique
Over the past several decades, China's economy experienced high speed development, but environmental protection do not obtained in many places it is due
Pay attention to, keeps our ecological environmental pollution serious.Wherein, numerous rivers and lakes receive a large amount of industrial wastewater and life
Sewage even rubbish, and for many years without carrying out effective dredging regulation, severe water pollution becomes black and odorous water, seriously affects
The living environment of people and hinder regional economy sustainable development.Therefore the improvement of comprehensive water body environment has become these ground
District government's vital task is very urgent.
It is dredging that water body environment, which administers most basic work,.During river and lake dredging, due to the body of mud itself
Huge, the only productivity height of dredging treatment process, the completion dredging work of ability short time is measured, and is reduced to the production of periphery enterprise
With the influence of people's life；Also require dehydration rate high simultaneously, making that treated, moisture content of the cake is low, is convenient for subsequent processing and benefit
With, and reduce the secondary pollution possibility to environment.
Domestic desilting equipment mostly uses large dredger to carry out large area operation, the mud air storage of cleaning, land occupation
Environment is polluted again；It to small-sized river course or pond then without suitable equipment, is generally used and manually dredges, take a lot of work laborious, work
Environment is very poor.
Summary of the invention
Based on this, the object of the present invention is to provide a kind for the treatment of process of sludge dewatering, with high efficiency dredging,
Reduce secondary environmental pollution risk, the high advantage of dewatering rate.
A kind for the treatment of process of sludge dewatering, includes the following steps:
S10: water-containing sludge is input in homogeneous tank, water-containing sludge is stirred evenly；
S20: being input to flocculation tank for water-containing sludge after mixing evenly, the addition of Xiang Suoshu flocculation tank by flocculant and/or
The mixed chemical additive of flocculation aid and/or deodorant composition makes water-containing sludge and mixed chemical additive after mixing evenly
Sufficiently reaction；
S30: the water-containing sludge after sufficiently reacting with mixed chemical additive is input to thickener, is added to mixed chemical
Water-containing sludge after adding agent sufficiently to react carries out gravity concentration processing, and filters out sewage；
S40: the water-containing sludge after gravity concentration is input to blender, Xiang Suoshu blender addition conditioner simultaneously stirs；
S50: being input to filter press for the water-containing sludge after stir process, carries out filters pressing to the water-containing sludge after stir process
Processing, and filter out sewage；
S60: by filters pressing, treated that water-containing sludge is input to sludge discharging machine, and dewatered mud cake is discharged.
The treatment process of sludge dewatering of the present invention stirs evenly water-containing sludge using homogeneous tank, and buffering is led
The fluctuating change of the discharge of sewage and clay content that enter saves subsequent additive dosage, is conducive to subsequent sludge dewatering treatment and sets
Standby stable operation is to maintain the basis of high dehydration rate；Using the group for including a variety of chemical addition agents such as flocculant, flocculation aid
It closes, is conducive to the cohesion and dehydration of sludge；Dehydration is carried out by gravity concentration and is added according to the ingredient of organic matter in water-containing sludge
Add conditioner to change the structure of sludge, is that better sludge characteristics are created in the dehydration of subsequent filter press；Filters pressing processing carries out the
Double dehydration improves dehydration rate.
Further, the homogeneous tank includes tank body and diving mixer；The tank body is horizontal, the diving mixer
It is two, is lifted on the tank interior respectively；The diving mixer mounting height is identical, and impeller is opposite, and axis is parallel.
It using horizontal homogeneous tank, is moved easily, is not easy to topple in transport process, it is reusable；Using the latent of lifting
Water mixer, structure is simple, and diving mixer is convenient to removal tank body and is overhauled, due to the bottom of diving mixer and tank body
Part is not from contacting, less scaling, easy to clean and working service；In addition, low energy consumption for diving mixer, it is more energy efficient.
Further, the filter press is belt filter press comprising mutually matched two for extrusion of water-containing sludge
Strainer, the strainer are to plant hair strainer；The plant hair strainer includes planting hair and strainer layer；The strainer layer is upper layer and lower layer,
Upper layer and lower layer strainer layer is bonded together, and upper layer and lower layer strainer layer is both provided with through-hole；The through-hole and lower filter belt layer of upper strainer layer
Throughhole portions or whole intersecting；The plant hair is uniformly fixed on strainer layer surface.
Filter press, which is equipped with, plants hair strainer, and very thin plant hair can tangle floc sedimentation dirt during gradually pressurizeing to sludge
Mud reduces two sides and runs mud and sludge refluence phenomenon, can more be pierced into sludge, promote more sludge internal junction Heshuis, pore water
It is extruded, improves dewatering rate.
Further, the filter press further include it is at least one set of squeeze to roller, two strainers hold water-containing sludge from described
It squeezes to being passed through in the roller gap of roller.
The extruding pressurizes to roller to two strainers, forms the higher-pressure region to water-containing sludge, further increases dewatering rate.
Further, before described the step of water-containing sludge is input in homogeneous tank, water-containing sludge is stirred evenly, also
Include the following steps:
Ship pump silt dredging mud is inhaled using twisting, scarfing cinder processing is carried out to mud by smoothing machine, mud is carried out by litter cleaning machine
It removes sand processing, obtains water-containing sludge.
It by twisting the mud inhaled in ship pump suction river and lake, and is pre-processed before carrying out sludge dewatering, clearly
Except the rubbish and the grains of sand adulterated in mud, is conducive to the stable operation of subsequent sludge dewatering treatment equipment and prevents equipment fault,
The impurity of the mud cake after sludge dewatering and the recycling of mud cake are advantageously reduced simultaneously.
Further, further include following steps S60: collecting the sewage that filters out in above-mentioned steps S30 and S50, to sewage into
Row clarification, obtains clear liquid and turbid.
Further, described to collect the sewage filtered out in above-mentioned steps S30 and S50, sewage is clarified, clear liquid is obtained
Further include following steps and after the step of turbid:
S80: turbid is returned into homogeneous tank, carries out sludge dewatering again；
S90: the thickener and filter press after clear liquid flushing work are used.
It can be obtained by above-mentioned technical proposal, the sewage filtered out in sludge dehydration process is clarified as clear liquid, can be used for rinsing pressure
Filter and thickener, promote water resource recycles and saves water resource, and the clear liquid obtained after clarifying can be arranged directly
It puts and does not pollute the environment；And turbid then participates in the process of sludge dewatering again, improves the productivity of mud cake.
Further, the step S20 is to be pumped to water-containing sludge after mixing evenly from homogeneous tank by slush pump
Flocculation tank.
Further, the flocculant, flocculation aid, regulation machine and deodorant are respectively combined by medicine system by chemical feed pipe
It is added to the flocculation tank, thickener and blender.
Further, moisture content of the cake≤50%.A variety of chemical addition agent combination auxiliary cohesions and double dehydration pole
The earth improves the dehydration rate of sludge.
In order to better understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is the treatment process route map of sludge dewatering of the invention；
Fig. 2 is the complete set of equipments layout drawing of the treatment process of sludge dewatering of the invention；
Fig. 3 is the flow diagram of the treatment process of sludge dewatering of the invention；
Fig. 4 is the structural schematic diagram of the homogeneous tank of the treatment process of sludge dewatering of the invention；
Fig. 5 is the structural schematic diagram of the flocculation tank of the treatment process of sludge dewatering of the invention；
Fig. 6 is the structural schematic diagram of the thickener of the treatment process of sludge dewatering of the invention；
Fig. 7 is the structural schematic diagram of the blender of the treatment process of sludge dewatering of the invention；
Fig. 8 is the structural schematic diagram of the filter press of the treatment process of sludge dewatering of the invention；
Fig. 9 is the structural schematic diagram of the plant hair strainer of the treatment process of sludge dewatering of the invention；
Figure 10 is the pretreated flow chart of the treatment process of sludge dewatering of the invention；
Figure 11 is the process flow diagram to the sewage filtered out of the treatment process of sludge dewatering of the invention.
Specific embodiment
During solving river and lake dredging in the prior art, sludge is difficult to handle, and dehydration rate is low, pollutes environment
Problem, the present invention provide a kind for the treatment of process of sludge dewatering, mainly it is a variety of chemically and physically react by way of, optimization group
It closes processing technological flow and obtains higher dehydration rate under the premise of guaranteeing Treatment of Sludge productivity, so that the mud cake excluded obtains
Lower moisture content is obtained, provides good basis for subsequent further Treatment of Sludge and utilization.
Please refer to Fig. 1 and Fig. 2, the treatment process of sludge dewatering of the invention includes the following steps:
S10: water-containing sludge is input in homogeneous tank, water-containing sludge is stirred evenly；
S20: being input to flocculation tank for water-containing sludge after mixing evenly, the addition of Xiang Suoshu flocculation tank by flocculant and/or
The mixed chemical additive of flocculation aid and/or deodorant composition makes water-containing sludge and mixed chemical additive after mixing evenly
Sufficiently reaction；
S30: the water-containing sludge after sufficiently reacting with mixed chemical additive is input to thickener, is added to mixed chemical
Water-containing sludge after adding agent sufficiently to react carries out gravity concentration processing, and filters out sewage；
S40: the water-containing sludge after gravity concentration is input to blender, Xiang Suoshu blender addition conditioner simultaneously stirs；
S50: being input to filter press for the water-containing sludge after stir process, carries out filters pressing to the water-containing sludge after stir process
Processing, and filter out sewage；
S60: by filters pressing, treated that water-containing sludge is input to sludge discharging machine, and dewatered mud cake is discharged.
Wherein, in step 10, homogeneous tank, which can use aeration type homogeneous tank or use, is provided with diving mixer
Homogeneous tank, in one embodiment, referring to Fig. 2,3 and 4, the present invention using the homogeneous tank 1 for being provided with diving mixer,
It is more energy efficient compared to aeration type homogeneous tank.Using the reason of pot type be pot type be closed be conducive to keep the clean and tidy of equipment and environment with
Environmental protection also can control penetrating odor and dissipate and overflows.In addition, the homogeneous tank 1 includes tank body 11 and diving mixer 12；The tank
Body 11 is horizontal oval tubular, and integrally closed, the diving mixer 12 is two, is lifted on inside the tank body 11 respectively；
12 mounting height of diving mixer is identical, and impeller is opposite, and axis is parallel.Horizontal setting is shifted convenient for vehicle-mounted transport, thus
The realization equipment of the treatment process of sludge dewatering of the invention is mobile.Aqueous dirt is stirred evenly by diving mixer 12
Mud can save subsequent additive dosage so that water-containing sludge can be reacted sufficiently when subsequent addition chemical addition agent.
Diving mixer separates less scaling with the bottom of tank body, is convenient to clean.
In step 20, referring to Fig. 2,3 and 5, the flocculation tank 2 is the tank body of vertical mixer, equipped with stirring in tank body
It mixes device and is stirred continuously 30~40 points after addition is including mixed chemical additives of compositions such as flocculant, flocculation aid and deodorant
Clock, so that most sludge is precipitated, forms floc sedimentation so that mixed chemical additive is sufficiently reacted with water-containing sludge.Add
The peculiar smell for adding deodorant removal sludge, reduces the odor contamination to environment, is conducive to subsequent Treatment of Sludge.
In one embodiment, in the step 20, the step S20 is aqueous by after mixing evenly by slush pump
Sludge is pumped to flocculation tank from homogeneous tank.This is because homogeneous tank mounting surface 3.5m lower than other equipment mounting surface or more.
In one embodiment, the homogeneous tank 1 and 2 quantity of flocculation tank are two, between any two by placed in series, are made
It obtains entire process flow and realizes that circulation continuous constantly carries out sludge dewatering.
In step 30, referring to Fig. 2,3 and 6, the subsequent connection of vertical mixer is thickener 3, and thickener 3 is a band
Formula conveyer, conveyer belt are made of braiding synthetic fibers filter clothes, using its high permeability rate realize the water-containing sludge of floc sedimentation shape with
Water efficiently separates, and filters out sewage.
It in step 40, is horizontal mixer 4 after thickener 3, horizontal mixer is for referring to Fig. 2,3 and 7
The sewage being significantly concentrated is stirred again, while and add conditioner, be subsequent belt filter press dehydration create it is more preferable
Sludge characteristics.
In addition, addition chemical addition agent is completed by medicine system 5, the dosing in step 20 and step 40
System includes additive preparation system, stirs evenly system, stocking system, metering system and pumping system, enumerates matching for additive
Medicine is stirred evenly, is stored, weighing and the overall process of dosing, is connect respectively with flocculation tank and blender by chemical feed pipe, in sludge
The different links of the treatment process of dehydration add chemical addition agent.The chemical addition agent being equipped in medicine system include flocculant,
Chemical addition agent in flocculation aid, conditioner and deodorant at least 4.
In step 50, referring to Fig. 2,3,8 and 9, the water-containing sludge after stir process is input to filter press 6, to mixed
Water-containing sludge after closing reaction carries out filters pressing processing, and filters out sewage.In the present invention, filter press described in the filter press 6 is
Belt filter press comprising mutually matched two strainers 61 for extrusion of water-containing sludge, the strainer 61 are to plant hair strainer；
The plant hair strainer includes planting hair 611 and strainer layer 612；The strainer layer is upper layer and lower layer, and upper layer and lower layer strainer layer is bonded in
Together, upper layer and lower layer strainer layer is both provided with through-hole；The through-hole of upper strainer layer interlocks with the throughhole portions of lower filter belt layer or all
Stacking；The plant hair is uniformly fixed on strainer layer surface.Filter press 6 be equipped with plant hair strainer, very thin plant hair to sludge by
Floc sedimentation sludge can be tangled during gradually pressurizeing, and reduced two sides and run mud and sludge refluence phenomenon, can more be pierced into sludge, promote
More sludge internal junction Heshuis, pore water are extruded, and improve dewatering rate.
Further, the filter press 6 further includes at least one set of extruding to roller, and two strainers 61 hold water-containing sludge from institute
Extruding is stated to passing through in the roller gap of roller.
The extruding pressurizes to roller to two strainers, forms the higher-pressure region to water-containing sludge, further increases dewatering rate.
Referring to Fig. 10, in one embodiment, it is described that water-containing sludge is input in homogeneous tank, water-containing sludge is stirred
Further include following steps before uniform step 10:
Using twist inhale ship 7 pump silt dredging mud, by smoothing machine 8 to mud carry out scarfing cinder processing, by litter cleaning machine 9 to mud into
Capable processing of removing sand, obtains water-containing sludge.
In the step, pre-processed before carrying out sludge dewatering, using traditional strand inhale ship by river or lake or
Pond bottom silt stirs, and silt mixes river water and forms mud, is pumped and goes on board, then soft by keeping afloat
Pipe is by slurry transportation to riverbank, then the pipe-line system by arranging along river is by slurry transportation to smoothing machine 8 and litter cleaning machine 9.Its
In, smoothing machine 8 is carried secretly for removing the various rubbish that the diameter carried secretly in mud is more than 3mm, litter cleaning machine for removing in mud
Partial size be more than 0.2mm the grains of sand, separative efficiency is up to 96%~98%.The main purpose of the step is to remove to adulterate in mud
Rubbish and the grains of sand, prevent rubbish and the grains of sand from damaging subsequent sludge dewatering treatment equipment or causing mechanical disorder, thus favorably
In the high efficiency of stable operation and the guarantee sludge dewatering of subsequent sludge dewatering treatment equipment.
In view of can all filter out sewage in step 30 and 50, in order to which that realizes water resource recycles and improves mud cake
Productivity please refers to Figure 11, further includes following steps 70 in one embodiment: the sewage filtered out in above-mentioned steps is collected, it is right
Sewage is clarified, and clear liquid and turbid are obtained.
After the step of sewage filtered out in the collection above-mentioned steps, clarifies sewage, obtains clear liquid and turbid,
Further include following steps:
Step 80: turbid being returned into homogeneous tank, carries out sludge dewatering again；
Step 90: using the thickener and filter press after clear liquid flushing work.
Step 70~90 pair sewage is handled, and the clear liquid after clarification is up to standard can also be used as flushing with direct emission
The use water of thickener and filter press after work, realizes the effective use of water resource.And turbid is back in homogeneous tank, can be adjusted
Even water-containing sludge increases mud cake productivity.
It is noted that after the treatment process processing of sludge dewatering through the invention, the moisture content of the cake of discharge≤
50%.The cohesion of multiple additives auxiliary and double dehydration greatly improve the dehydration rate of sludge.
Compared to the prior art, the treatment process of sludge dewatering of the present invention uses homogeneous tank for water-containing sludge
It stirs evenly, saves subsequent additive dosage, be conducive to the stable operation of subsequent sludge dewatering treatment equipment, be to maintain high de-
The basis of water rate；Using the combination for including a variety of chemical addition agents such as flocculant, flocculation aid, is conducive to the cohesion of sludge and takes off
Water；Double dehydration is handled by gravity concentration and filters pressing, improves dehydration rate.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.
Claims (10)
1. a kind for the treatment of process of sludge dewatering, which comprises the steps of:
S10: water-containing sludge is input in homogeneous tank, water-containing sludge is stirred evenly；
S20: water-containing sludge after mixing evenly is input to flocculation tank, the addition of Xiang Suoshu flocculation tank is by flocculant and/or helps solidifying
The mixed chemical additive of agent and/or deodorant composition, keeps water-containing sludge after mixing evenly and mixed chemical additive abundant
Reaction；
S30: being input to thickener for the water-containing sludge after sufficiently reacting with mixed chemical additive, to mixed chemical additive
Water-containing sludge sufficiently after reaction carries out gravity concentration processing, and filters out sewage；
S40: the water-containing sludge after gravity concentration is input to blender, Xiang Suoshu blender addition conditioner simultaneously stirs；
S50: being input to filter press for the water-containing sludge after stir process, carries out at filters pressing to the water-containing sludge after stir process
Reason, and filter out sewage；
S60: by filters pressing, treated that water-containing sludge is input to sludge discharging machine, and dewatered mud cake is discharged.
2. the treatment process of sludge dewatering according to claim 1, it is characterised in that: the homogeneous tank includes tank body and dives
Water mixer；The tank body be it is horizontal, the diving mixer be two, be lifted on the tank interior respectively；The diving
Blender mounting height is identical, and impeller is opposite, and axis is parallel.
3. the treatment process of sludge dewatering according to claim 1, it is characterised in that: the filter press is belt filters pressing
Machine comprising mutually matched two strainers for extrusion of water-containing sludge, the strainer are to plant hair strainer；The plant hair strainer
Including planting hair and strainer layer；The strainer layer is upper layer and lower layer, and upper layer and lower layer strainer layer is bonded together, upper layer and lower layer strainer layer
It is both provided with through-hole；The through-hole of upper strainer layer and the throughhole portions of lower filter belt layer or whole intersectings；The plant hair is uniformly solid
It is scheduled on strainer layer surface.
4. the treatment process of sludge dewatering according to claim 3, it is characterised in that: the filter press further includes at least one
Group is squeezed to roller, and two strainers hold to be passed through in roller gap of the water-containing sludge from the extruding to roller.
5. the treatment process of sludge dewatering according to claim 1, it is characterised in that: described to be input to water-containing sludge
Further include following steps before the step of water-containing sludge is stirred evenly in matter tank:
Ship pump silt dredging mud is inhaled using twisting, scarfing cinder processing is carried out to mud by smoothing machine, is removed sand by litter cleaning machine to mud
Processing obtains water-containing sludge.
6. the treatment process of sludge dewatering according to claim 1, which is characterized in that further include following steps S60: collecting
The sewage filtered out in above-mentioned steps S30 and S50, clarifies sewage, obtains clear liquid and turbid.
7. the treatment process of sludge dewatering according to claim 6, which is characterized in that the collection above-mentioned steps S30 and
Further include following steps after the step of sewage filtered out in S50, clarifies sewage, obtains clear liquid and turbid:
Turbid is returned to homogeneous tank by S61, carries out sludge dewatering again；
S62 uses the thickener and filter press after clear liquid flushing work.
8. the treatment process of sludge dewatering according to claim 1, it is characterised in that: the step S20 is to pass through mud
Water-containing sludge after mixing evenly is pumped to flocculation tank from homogeneous tank by pump.
9. the treatment process of sludge dewatering according to claim 1, it is characterised in that: the flocculant, flocculation aid, conditioning
Machine and deodorant, which are respectively combined by medicine system by chemical feed pipe, is added to the flocculation tank and blender.
10. the treatment process of sludge dewatering according to claim 1, it is characterised in that: moisture content of the cake≤50%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110066097A (en) * | 2019-04-25 | 2019-07-30 | 北京金河水务建设集团有限公司 | A kind of riverway sludge dehydrating and curing treatment process |
| CN114315092A (en) * | 2021-12-31 | 2022-04-12 | 江苏环保产业股份有限公司 | Sludge dewatering treatment method |
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| CN105461189A (en) * | 2015-12-28 | 2016-04-06 | 上海中信水务产业有限公司 | Combined sludge deep dehydration system and deep dehydration technique |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110066097A (en) * | 2019-04-25 | 2019-07-30 | 北京金河水务建设集团有限公司 | A kind of riverway sludge dehydrating and curing treatment process |
| CN114315092A (en) * | 2021-12-31 | 2022-04-12 | 江苏环保产业股份有限公司 | Sludge dewatering treatment method |
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