CN107285604A - A kind of dense mud consolidated depth dewatering of selective oxidation - Google Patents
A kind of dense mud consolidated depth dewatering of selective oxidation Download PDFInfo
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- CN107285604A CN107285604A CN201710711098.5A CN201710711098A CN107285604A CN 107285604 A CN107285604 A CN 107285604A CN 201710711098 A CN201710711098 A CN 201710711098A CN 107285604 A CN107285604 A CN 107285604A
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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
- C02F11/12—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
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
A kind of dense mud consolidated depth dewatering of selective oxidation of the present invention, dewatered sludge after Fenton reagent and flocculation dewatering is mixed, utilize the EPS in Fenton reagent selective oxidation degraded dewatered sludge, make to be converted into Free water with reference to water, form the dense mud state for being easy to dehydration and be delivered to plate and frame filter press and carry out filter-press dehydration, the deep dehydration sludge that water content is down to 48 55% is obtained, small volume, mud waste water is few.The dense mud consolidated depth dewatering for the selective oxidation that the present invention is provided, secondary deep dewatering is carried out to dewatered sludge or the old sludge of sludge sump, moisture content is less than the moisture percentage in sewage sludge that existing dewatering process is produced, the method heightened moisture content and nursed one's health using flocculants such as iron ion and lime that need to be added water again to dewatered sludge progress from existing dehydration technique is different, need not add water just can directly nurse one's health, and have important practical value to the deep dehydration of a large amount of dewatered sludges produced every year and the old sludge of sludge sump being widely present.
Description
Technical field
The invention belongs to municipal dewatered sludge and the old sludge treatment field of sludge sump, and in particular to a kind of selective oxidation
Dense mud consolidated depth dewatering.
Background technology
In recent years, with the fast development of China's economy, the discharge capacity of municipal sewage continues to increase, water processing establishment construction
Put more effort, cause the yield of inevitable outcome-sludge in water treatment procedure to be continuously increased.According to《Close in house town and country construction portion
In the circular of the national urban wastewater treatment Facilities Construction of the first quarter in 2016 and running situation》Data display, by 2016 3
At the end of month, national cities and towns are accumulative to build up sewage treatment plant 3910, and sewage treatment capacity is up to 1.67 hundred million m3/ d, sewage load is carried
Height necessarily brings sludge quantity to increase, and sewage disposal is substantially that polluter migrates the mistake into sludge in water after Degradation and Transformation
" the light mud of heavy water " thought is still retained in journey, and industry.Announced according to State Statistics Bureau《National economy in 2015 and society are sent out
Open up statistical communique》It has been shown that, by the end of the year 2015, sludge yield reaches 35,000,000 tons (moisture content is in terms of 80%), it is contemplated that the year two thousand twenty,
The municipal sludge yield of China is up to ten thousand tons of 6000-9000, therefore the minimizing of sewage plant sludge just turns into a focus.
For a long time, China's a big chunk dewatered sludge takes land-fill method to be disposed, therefore, it is in all parts of the country also
Generally existing big and small sludge sump and interim stacking field, and the old sludge of these sludge sumps is exactly that the dehydration of sewage plant is dirty substantially
Mud, its moisture content is 78-82%, and moisture content is high, and volume is big, and quality is soft, hardly possible compacting, and compacting machinary when easily causing landfill
The landslide of body is skidded and filled to depression.In addition, as land use day is becoming tight, the minimizing of the old sludge of sludge sump also increasingly by
To everybody concern.
The appropriate method of disposal of dewatered sludge mainly has the means such as landfill, burning, compost and building materials, and these are influenceed at present
The biggest obstacle that means are smoothly implemented is that the moisture percentage in sewage sludge after dispatching from the factory is still too high.Moisture content is up to after excess sludge is produced
96-98%, is similar fine hair branch and net of wadding structure, contains a large amount of hydrophily organic matters, it is extremely difficult to be dehydrated.At present, more ripe dirt
Mud dehydration technique enters plate compression after mainly being nursed one's health by excess sludge through flocculants such as molysite, aluminium salt, PAM or through electrolyte
The equipment such as machine, centrifugal dehydrator or belt filter press are dehydrated, and moisture content is down to 78-82%, it is virtually impossible to reach less than 60%；
In addition, also have the modes such as heat conditioning, Frozen-thawed cycled and ultrasound conditioning, but because the main component of excess sludge is still water and requirement
Quickly complete dehydration so that these conditioning means are difficult to promote.In recent years, engendered and iron ion is added in excess sludge
With the dewatering such as lime or flyash, and moisture percentage in sewage sludge can be down to less than 60% by Large-scale High-Pressure plate compression, but lacked
Point is that treating capacity is big and the increase of dehydrated sludge amount is obvious, can not break away from by adding dry to adjust the suspicion of moisture content all the time
Doubt, deep dehydration truly is not realized, can only reach that the double effectses of reduction moisture content and volume reduction just may be used
To be referred to as deep dehydration.
Fenton reagent is as a kind of inexpensive advanced oxidation agent simple and easy to get in degraded difficult degradation organic matter, destruction EPS
With in terms of cell membrane have its distinctive advantage, can be applied to high concentrated organic wastewater processing, landfill leachate treatment and
In terms of the pretreatment of microorganism hard-degraded substance before processing.In recent years, sludge of sewage treatment plant dehydration minimizing side is being realized
Face also occurs in that some are attempted, and such as Application No. 201110087907.2 discloses the excess sludge concentration of moisture content more than 95%
After acidifying, successively nursed one's health using " Fenton reagent oxidation+CPAM flocculations ", through centrifugal dehydration so that final moisture content is by 87.7%
It is down to 79.3%；Application No. 201610135493.9, which is disclosed, to be first let down dewatered sludge, is acidified to moisture content for 96%-99%,
Equivalent to excess sludge or thickened sludge, the dewatering efficiency of sludge can be improved by recycling Fenton to carry out oxidation conditioning；Application
Number being disclosed for 201010000269.1 improves excess sludge through Fenton reagent oxidation again after a kind of acidifying using bioanalysis and takes off
The method of aqueous energy, sludge specific resistance is less than 4 × 108 s2/ g, dehydrated sludge moisture content is down to 65-75%；Application No.
201210449383.1 disclose one kind in thickened sludge after elder generation through " Fenton+ surfactants+PAM " co-conditioning it is laggard
Row mechanical dehydration, final moisture content can be down to 78.2% by 87.7%；Application No. 201110300223.6, which is disclosed, is working as sludge
Moisture content is successively nursed one's health more than 95% using " Fenton/ modified Fenton reactions+framework construction thing ", and early stage destruction organic matter changes
Become water morphology, later stage reduction sludge compressibility can be substantially prevented from drainage channel blocking, and sludge specific resistance reduced rate surpasses after conditioning
80% is crossed, moisture content can be down to 30-60% after frame dehydration, but the increase of this method sludge quantity is fairly obvious, subsequent treatment
Amount is big, and cost is high.
In summary, dewatering process is the excess sludge for moisture content 96-98% after existing Fenton oxidation, is existed
That medicament volume is big, need early stage to be acidified, dehydration equipment build is larger, generation substantial amounts of acid sludge water the shortcomings of, because
This is difficult to a wide range of popularization.In addition, major part sewage plant is such as carried using dehydrating process after first flocculating using aforesaid way at present
Larger change may be made to original dewatering system by rising dewatering efficiency, and dehydration equipment load is high, energy consumption is big, Fenton reagent
Serious to equipment corrosion, and when carrying out deep dehydration applied to the old sludge of sludge sump, early stage, which needs to reuse a large amount of water, to be let down
Sludge causes moisture content to recall to more than 95% again, can enforcement difficulty it is larger.
The content of the invention
To solve problem of the prior art, the present invention provides a kind of dense mud consolidated depth dewatering of selective oxidation,
Deep dehydration is carried out for dewatered sludge and the old sludge of sludge sump.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of dense mud consolidated depth dewatering of selective oxidation, comprises the following steps：
Step 1: selective oxidation material is mixed with the dewatered sludge after sewage treatment plant's flocculation dewatering and aoxidize instead
Should, using the EPS that dehydration is hindered in selective oxidation material selectivity oxidative degradation dewatered sludge, make the combination in dewatered sludge
Water is converted into Free water, and conversion ratio is 35-40%, and fluidity improves 88-92%, forms the dense pureed state for being easy to dehydration；
Step 2: the sludge for the dense pureed state that step one is obtained, which is delivered to plate and frame filter press, carries out depth filter-press dehydration, obtain
Water content is 48-55% deep dehydration sludge, and the deep dehydration sludge cake volume is the dewatered sludge mud after flocculation dewatering
The 33-35% of cake volume, is the 50-60% of uniform pressure but the mud cake volume of not oxidised processing.
Further, in step one, the sewage treatment plant is added to excess sludge after flocculant flocculates to be passed through again
Belt filter press carries out belt type filter-pressing dehydration plant or carries out centrifugal dehydration by centrifugal filter press machine, forms dewatered sludge, the residue
The moisture content of sludge is 96-98%, and the moisture content of the dewatered sludge is 78-82%, and the dewatered sludge volume is reduced to remaining dirt
The 1/4-1/10 of mud volume.
Further, in step one, the selective oxidation material is Fenton reagent, including FeSO4·7H2O and
H2O2, dewatered sludge and FeSO after the flocculation dewatering4·7H2O solid powders carry out adding H again after being well mixed2O2Solution
Fenton oxidation reaction is carried out, for the EPS in dewatered sludge of degrading.
Further, the H2O2Dosage H in molar ratio2O2:FeSO4·7H2O=1.8：1-2.2:1, FeSO4·
7H2O dosage is 40.5-49.5% DS, H2O2Dosage be 0.33 mL/g DS.
Further, in step one, the fluidity of the dense pureed state sludge is 90-120 mm, and moisture content is 85-88%.
Further, in step one, the selective oxidation material and the dewatered sludge after sewage treatment plant's flocculation dewatering
Uniformly mixed by double axial mixer.
Further, in step 2, the dense pureed state sludge is delivered to plate and frame filter press by plunger pump and carries out depth
Filter-press dehydration, dewatering time is 30 min, and pressure is 0.8-1.0 Mpa.
Further, in the sludge water and step 2 that are obtained in the step one after flocculation dewatering after plate and frame filter press press filtration
Obtained sludge water is recycled to sewage disposal system and carries out sewage disposal.
Compared with prior art, the present invention has advantages below：
The present invention provides a kind of dense mud consolidated depth dewatering of selective oxidation, for dewatered sludge or the old sludge of sludge sump
Carry out secondary deep dewatering and its moisture content is down to 48-55%, dewatered sludge need to be carried out again with existing deep dehydration technology
Adding water, the method heightened moisture content and nursed one's health using flocculants such as iron ion and lime is different, and the present invention, which need not add water, just may be used
Directly nursed one's health, selective oxidation material is added directly in dewatered sludge or the old sludge of sludge sump and is decomposed in sludge and hinders water
Divide the materials such as the EPS of discharge, more cell combination water is converted into Free water, improve the mobility of sludge, it is every for China
The higher dewatered sludge of nearly 40,000,000 tons of moisture content and the deep dehydration for the old sludge of sludge sump being widely present that year produces have
Important value.
1）Existing sewage plant evaporation plant can keep present situation substantially, can match with belt filter press or centrifugal dehydrator
Set, takes full advantage of the advantage of early stage flocculation, and early stage dewatering process is kept intact substantially, greatly reduces later stage building sequence formula depth
The load of dehydration, is easy to sewage plant to come into operation；
2）The flocculation dewatering of first stage and the conditioning effect of the Fenton oxidation conditioning of second stage are independent of each other, and fully demonstrate
The advantage that two kinds of conditioning modes are combined is maximized, and dosage is small, corrosion that is being caused to equipment is low, and the acid sludge water of generation is significantly
Reduce, sewage disposal system will not be affected greatly substantially during reflow treatment；
3）Sludge reduction effect is obvious, and mixing conditioning medicament hardly increases sludge dry；
4）Without carrying out early stage acidifying to sludge, pH value needed for being rapidly reached reaction by Fenton autoreactivity, without
Early stage is acidified；
5）Key component-EPS in Fenton reagent selective oxidation degraded sludge, additive material is few, can be quickly by dirt
Combination water in mud is converted into Free water, improves the mobility of sludge, forms the dense pureed state that can be directly dehydrated, and improves
The deep dehydration performance of sludge, dewatering efficiency is high, and waste water yield is few, and sludge volume can be quickly reduced under low voltage situations,
It is easy to convey and compact board frame filter press is pumped into by plunger pump；
6）Dewatered sludge after chosen property is decomposed is pumped into compact board frame filter press through plunger pump and consolidated under oil pressure pressurization
Knot dehydration, according to the requirement of concrete engineering, can reach that 48-55%'s is de- by adjusting pre-treatment pressing time and moulding pressure
Water effect, small-sized plate and frame filter press can be with independent operating, and equipment is small, energy consumption is low, process is simple, and building sequence formula deep dehydration effect is more
It is high, it is easy to operate.
Brief description of the drawings
Fig. 1 is the process chart of the present invention；
Fig. 2 is the experimental result comparison diagram of the present invention and prior art；
Wherein, a is the mud cake without Fenton oxidation processing, and b is the mud cake handled through Fenton oxidation.
Embodiment
The present invention is further described with reference to specific embodiment.
As shown in Figure 1-2, the dense mud consolidated depth dewatering of a kind of selective oxidation, for dewatered sludge or sludge sump
Old sludge carries out secondary deep dewatering and its moisture content is down into 48-55%, including two entirely different stages：First stage
For flocculation dewatering, delivered in the excess sludge that moisture content is 96-98% after a certain amount of flocculant is flocculated again by belt
Filter press carries out belt type dehydration, or carries out centrifugal dehydration, substantially " mud is taken in water " stage by centrifugal filter press machine, and its parent is
Water, main task during dehydration is to ensure that larger rate of water loss, now, and the permeability of sludge is limiting factor, should be as far as possible
So that sludge keeps preferable skeleton, the dehydrating amount and volume compression amount in the stage are big, and required pressure is small, and the time is short, the first rank
The dewatered sludge that section is produced after flocculation dewatering is further processed into second stage, and the sludge water produced passes through pipeline
Collect to sewage disposal system and recycled again；Second stage is nursed one's health for Fenton oxidation, substantially " is fetched water in mud "
Stage, its parent is mud, and the main task of second stage is to ensure that the maximum degree of dehydration of sludge, now, point of sludge water content
Cloth form is limiting factor, in it should promote sludge in the case of ensureing enough drainage channel as far as possible moisture from combine water to
Free water is converted, and compared with the first stage, the dehydrating amount and volume compression amount of the stage sludge are relatively small, and required pressure is big,
Time is long, therefore need to change water morphology using oxidation mechanisms, the muddy water combination gesture of sludge it is higher to have its source in sludge organic
Glucide in matter, only need to targetedly be degraded to glucide, you can effectively facilitated and changed into Free water with reference to water,
Therefore, need to be well mixed Fenton reagent with the dewatered sludge that the first stage obtains, trigger Fenton oxidation reaction, shape
Into the dense pureed state for being easy to dehydration, the depth filter-press dehydration of next step is then carried out, the dense mud consolidated depth of sludge building sequence formula is formed
Dewatering process system, the moisture content for the deep dehydration sludge that the stage obtains is down to 48-55%, far below existing dewatering process
Moisture content, and the sludge water produced can be collected to sewage disposal system by pipeline and recycled.
The dense mud consolidated depth dewatering for the selective oxidation that the present invention is provided is not to the existing dehydration of sewage treatment plant
Technique carries out larger transformation, but by the process matching after existing dewatering process, to dewatered sludge or the old sludge of sludge sump
Conditioning materials formation by adding selective oxidation is easy to the dense pureed state of dehydration, without the ring such as added water and flocculated again
Section, the conditioning materials of selective oxidation are using Fenton reagent as main component, including FeSO4·7H2O and H2O2, H2O2Dosage
H in molar ratio2O2:FeSO4·7H2O=1.8:1-2.2:1, FeSO4·7H2O dosage is 40.5-49.5% DS, H2O2Throwing
Dosage is 0.33 mL/g DS, first by FeSO4·7H2O is effectively mixed with dewatered sludge or the old sludge of sludge sump, is reinjected
H2O2Fenton oxidation is triggered to react, the material such as EPS for hindering dehydration in sludge of degrading plays the wadding of first stage successively
It is solidifying to be dehydrated the Fenton strong oxidations with second stage to reach more preferable dehydrating effect.
After excess sludge carries out flocculation dewatering through the existing dewatering process system of sewage treatment plant, preferable skeleton can be kept
And permeability, moisture content is down to 78-82% rapidly in original dewatering process equipment, obtained dewatered sludge volume is reduced to surplus
The 1/4-1/10 of remaining sludge volume, sewage treatment plant need not change the flocculation dewatering process system of first stage；In second stage
The FeSO of dewatered sludge first stage flocculation dewatering produced using double axial mixer successively with Fenton reagent4·
7H2O and H2O2Uniformly mixed, directly by hindering moisture to discharge in Fenton reagent fast selective oxidative degradation sludge
Key component-EPS so that the water transform being combined originally with EPS is Free water, and without early stage acidifying, mobility is obtained
To improve, the dense pureed state sludge for being easy to dehydration is formed, fluidity reaches 90-120 mm, and moisture content is 85-88%, followed by
The sludge of dense pureed state is delivered to plate and frame filter press and carries out building sequence formula depth filter-press dehydration by plunger pump, and mud cake density and intensity add
Greatly, be conducive to transport and further processing, substantially reduce the total amount and expense of subsequent treatment disposing sludge, have sterilizing work concurrently
With plate and frame filter press is that control can be adjusted according to the actual requirements in press filtration type, pressure and pressing time for oil pressure adding pressure type
System, the very small amount sludge water of abjection can be collected to sewage disposal system through pipeline further to be handled.
Embodiment 1
A kind of dense mud consolidated depth dewatering of selective oxidation, technological process as shown in figure 1, sewage treatment plant produce contain
Water rate is up to after 96% excess sludge is flocculated according to existing dewatering process system through PAM flocculants again by belt press filtration
Machine carries out filter-press dehydration, obtains the dewatered sludge that moisture content is down to 80%, PAM dosage is 0.5% DS, then dirty in dehydration
The solvable FeSO of incorporation in mud4·7H2O solid powders, using double axial mixer by dewatered sludge and FeSO4·7H2O powder
H is reinjected after end is well mixed2O2Solution, and further mix in promotion Fenton oxidation reaction, degradation selectivity dewatered sludge
EPS materials, promote combine water convert to Free water and formed be easy to dehydration dense mud state, mobility raising 80%, FeSO4·
7H2O dosage is 45% DS, H2O2The concentration of solution is 30%, and dosage is 0.33 mL/g DS, will followed by plunger pump
Dense mud state sludge is pumped into compact board frame filter press, and question response proceeds by consolidated depth more than 30 min and is dehydrated, during setting dehydration
Between be 30 min, pressure is 0.8-1.0 MPa, and the moisture content of the deep dehydration sludge finally given is down to 50%, and deep dehydration is dirty
Mud mud cake volume is reduced to the 35% of dewatered sludge mud cake volume, is the 50- of uniform pressure but the mud cake volume of not oxidised conditioning
60%, as shown in Figure 2.
Embodiment 2
The excess sludge of certain sewage treatment plant uses FeSO4Flocculant is flocculated, and is then carried out belt type filter-pressing dehydration plant, is contained
Water rate is down to 78-82% dewatered sludge, in the Fenton oxidation conditioning stage without mixing FeSO again4·7H2O solid powders, are only needed
H is mixed again2O2Solution, H2O2With FeSO4·7H2O mol ratio is 2:1, remaining be the same as Example 1, Fe2+Existing flocculation,
It is the raw material of later stage Fenton reagent again, due to the Fe of solubilised state2+Easy oxidation by air, therefore incorporation FeSO4·7H2O powder
End and incorporation H2O2The interval of solution should be controlled within the short period.
Embodiment 3
The old sludge of certain sludge sump is flocculated and filter-press dehydration through sewage treatment plant, and moisture content is down to 78-82%, followed by spiral shell
Bar conveyer extract out after using double axial mixer by its FeSO with Fenton reagent4·7H2After the mixing of O solid powders again
Add H2O2Solution, carries out Quick Oxidation reaction, FeSO4·7H2The dosage of O solid powders is the old sludge of 150 g/kg, H2O2
The concentration of solution is 30%, and dosage is that the combination water in the old sludge of 66 mL/kg, sludge is converted into Free water, forms easily dehydration
Dense pureed state, conversion ratio is 35-40%, and fluidity improves 88-92%, sludge sump is then transmitted back to again, using vacuum preloading
Mode handles 20 d, and pressure set is 100 kPa, and the moisture content of the deep dehydration sludge finally given is brought down below 55%, mud cake
Volume is down to less than 40% of sludge cake volume after flocculation dewatering.
The flocculation dewatering process system of existing sewage treatment plant need not be both changed the invention provides a kind of, can effectively be dropped again
The building sequence formula deep dehydration method of low moisture percentage in sewage sludge and its volume, the dewatered sludge moisture content that existing sewage treatment plant dispatches from the factory is
78-82%, the moisture content of the deep dehydration sludge obtained after being handled through deep dehydration of the present invention can be down to 48-55%, less than existing
The dewatered sludge moisture content that sewage treatment plant dispatches from the factory, deep dehydration sludge cake volume is the dehydration that existing sewage treatment plant dispatches from the factory
The 33-35% of sludge volume, is directly to use sludge cake volume after uniform pressure dewater treatment without Fenton oxidation processing
50-60%, minimizing substantially, it is simple to operate, it is with low cost, easily for sewage treatment plant receive, also be adapted in sludge sump sludge
Minimizing processing in applied, mud cake calorific value is increased due to deviating from more juicy, is more conducive to follow-up place
Reason disposal, such as burns, fills, compost and building materials are utilized.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. the dense mud consolidated depth dewatering of a kind of selective oxidation, it is characterised in that comprise the following steps：
Step 1: selective oxidation material is mixed with the dewatered sludge after sewage treatment plant's flocculation dewatering and aoxidize instead
Should, using the EPS that dehydration is hindered in selective oxidation material selectivity oxidative degradation dewatered sludge, make the combination in dewatered sludge
Water is converted into Free water, forms the dense pureed state for being easy to deep dehydration；
Step 2: the sludge for the dense pureed state that step one is obtained, which is delivered to plate and frame filter press, carries out depth filter-press dehydration, obtain
Water content is 48-55% deep dehydration sludge, and the deep dehydration sludge cake volume is the dewatered sludge mud after flocculation dewatering
The 33-35% of cake volume, is the 50-60% of uniform pressure but the mud cake volume of not oxidised processing.
2. a kind of dense mud consolidated depth dewatering of selective oxidation according to claim 1, it is characterised in that step
In one, the sewage treatment plant adds to excess sludge and carries out dehydration formation dehydration by filter press again after flocculant flocculates
Sludge, the moisture content of the excess sludge is 96-98%, and the moisture content of the dewatered sludge is 78-82%, the dewatered sludge body
Product is the 1/4-1/10 of excess sludge volume.
3. a kind of dense mud consolidated depth dewatering of selective oxidation according to claim 1, it is characterised in that step
In one, the selective oxidation material is Fenton reagent, including FeSO4·7H2O and H2O2, the dehydration after the flocculation dewatering
Sludge and FeSO4·7H2O carries out adding H again after being well mixed2O2Fenton oxidation reaction is carried out, in dewatered sludge of degrading
EPS.
4. the dense mud consolidated depth dewatering of a kind of selective oxidation according to claim 3, it is characterised in that described
H2O2Dosage H in molar ratio2O2:FeSO4·7H2O=1.8:1-2.2:1, FeSO4·7H2O dosage is 40.5-49.5%
DS, H2O2Dosage be 0.33 mL/g DS.
5. a kind of dense mud consolidated depth dewatering of selective oxidation according to claim 1, it is characterised in that step
In one, the fluidity of the dense pureed state sludge is 90-120 mm, and moisture content is 85-88%.
6. a kind of dense mud consolidated depth dewatering of selective oxidation according to claim 1, it is characterised in that step
In one, the selective oxidation material is carried out with the dewatered sludge after sewage treatment plant flocculation dewatering by double axial mixer
Uniform mixing.
7. a kind of dense mud consolidated depth dewatering of selective oxidation according to claim 1, it is characterised in that step
In two, the dense pureed state sludge is delivered to plate and frame filter press by plunger pump and carries out depth filter-press dehydration, and dewatering time is 30
Min, pressure is 0.8-1.0 Mpa.
8. the dense mud consolidated depth dewatering of a kind of selective oxidation according to claim 1, it is characterised in that described
The sludge Water Sproading obtained in the sludge water and step 2 that are obtained in step one after flocculation dewatering after plate and frame filter press press filtration
Sewage disposal is carried out to sewage disposal system.
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| CN109264905A (en) * | 2018-10-08 | 2019-01-25 | 成都瑞索斯再生资源回收有限公司 | It is a kind of for construction refuse regenerated sewage disposal system |
| WO2020186620A1 (en) * | 2019-03-15 | 2020-09-24 | 招远市汇潮新能源科技有限公司 | Drying treatment method and system |
| CN113003913A (en) * | 2021-01-28 | 2021-06-22 | 河海大学 | Method and equipment for two-stage integrated deep dehydration of municipal sludge |
| CN114436499A (en) * | 2022-01-24 | 2022-05-06 | 济南大学 | Method for conditioning excess sludge by aluminum sludge in cooperation with advanced oxidation |
| CN115231801A (en) * | 2022-06-24 | 2022-10-25 | 河海大学 | Secondary deep dehydration method for algae slurry |
| CN116375305A (en) * | 2023-03-30 | 2023-07-04 | 长江生态环保集团有限公司 | Dehydrated sludge treatment process and application of obtained tail water in liquid fertilizer |
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| CN114436499A (en) * | 2022-01-24 | 2022-05-06 | 济南大学 | Method for conditioning excess sludge by aluminum sludge in cooperation with advanced oxidation |
| CN115231801A (en) * | 2022-06-24 | 2022-10-25 | 河海大学 | Secondary deep dehydration method for algae slurry |
| CN116375305A (en) * | 2023-03-30 | 2023-07-04 | 长江生态环保集团有限公司 | Dehydrated sludge treatment process and application of obtained tail water in liquid fertilizer |
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Application publication date: 20171024 |