CN108503173A - Municipal active sludge treatment catalytic body, sludge treating system and method for sludge treatment - Google Patents
Municipal active sludge treatment catalytic body, sludge treating system and method for sludge treatment Download PDFInfo
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- CN108503173A CN108503173A CN201810265106.2A CN201810265106A CN108503173A CN 108503173 A CN108503173 A CN 108503173A CN 201810265106 A CN201810265106 A CN 201810265106A CN 108503173 A CN108503173 A CN 108503173A
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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
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
- C02F2303/04—Disinfection
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses municipal active sludge treatment catalytic body, sludge treating system and method for sludge treatment, belong to municipal works technical field of sludge treatment, catalytic body is using stainless steel material as carrier, surface of stainless steel carried noble metal oxide skin(coating), metal oxide containing precious metals are solidificated in by way of being sintered or sputtering on the surface of stainless steel material, stainless steel material structure is round, rectangle or polygon tube body, multiple through-holes are provided on the tube wall of tube body, metal oxide containing precious metals are any one or more in platinum oxide, rhodium oxide, palladium oxide, iridium oxidation.Multiple through-holes are provided on the side wall of catalytic body of the present invention can obtain the specific surface area of bigger, increase the contact area of sludge and catalytic body, shorten the reaction time, the weight of itself of catalytic body is further alleviated simultaneously, catalytic body is exacerbated as mixture rolls in reactor and moves back and forth speed up and down, improves efficiency of sludge treatment.
Description
Technical field
The present invention relates to municipal works technical field of sludge treatment, and in particular to municipal active sludge treatment catalytic body, dirt
Mud treatment system and method for sludge treatment.
Background technology
Currently, activated sludge process is the processing method that city domestic sewage treatment plant generally uses, have going through for last 100 years
History.It will produce a large amount of sludge during Wastewater Treated by Activated Sludge Process, sewage treatment plant needs concentrate the sludge of generation, take off
The modes such as water and digestion are handled, and treated, and the sludge later stage also needs to the disposition filled, anaerobic digestion is either burned,
So cumbersome Treatment of Sludge and disposal process needs very high expense as support, and it is total can to account for entire sewage treatment plant
The 25%~60% of operating cost, cost is very high, but post-processing is by the way of landfill, burning in the prior art, also
It will cause to cause serious secondary pollution.
Using the post-processing mode of landfill：This method of disposal is simple, easy, at low cost, and sludge again need not height
Dehydration, it is adaptable.But there is also some problems, the espespecially formation of loading embeading percolation liquid and gas for Sludge landfill.Percolate is
A kind of liquid being heavily polluted, if site selection of landfill or the improper meeting polluted underground water environment of operation.The gas that landfill yard generates
Body is mainly methane, if not taking appropriate measures can set off an explosion and burn.
Using the post-processing mode of burning：After burning disposal, volume can reduce 85%~95%, Mass lost
70%~80%.High temperature incineration can also eliminate harmful levels of pathogens and harmful substance in sludge.High temperature incineration can rapidly, effectively
Sludge is set to obtain sterilization and the purpose of minimizing, product is sterile, odorless inorganic residues, moisture content zero.It is wherein more
Cyclophane hydrocarbons pollutant has not existed, other organic pollution contents are almost nil, and volume greatly reduces, and in severe day
It is not required to storage device under the conditions of gas, keeps sludge ultimate disposal extremely convenient.But the shortcomings that sludge incineration, is it is also obvious that pollutant
Yield is big, although can control the discharge of pollutant by the methods of additional fume treatment and flying dust processing, needs
A large amount of fund is put into, the burning cost of sludge is increased.
Using the post-processing mode of anaerobic digestion：Anaerobic digestion is the sludge treatment side generally used in the world at present
Method, compared with other methods, this method has many advantages, such as the volume killed germ, reduce sludge, the stabilization for promoting sludge final,
Biogas can be generated again simultaneously, recycle the energy, reduce energy consumption.From expanding economy, the utilization of resource, the protection of ecological environment
Etc. from the point of view of, anaerobic digestion has not only achieved the purpose that mud decrement, but realize recycling sludge utilization, be sludge treatment
Important method.During entire anaerobic sludge digestion, hydrolytic process rate is slow, is rate-limiting step, to cause sludge
The anaerobic digestion residence time grows the disadvantages such as (generally requiring 30 days or more), gas production be low.
The main reason for sludge moisture content after mechanical dehydration is high is because biological cells in sludge and colloid contain largely
" intracellular water " (account for all aqueous 70%) can not be by the whole extrusions of pressure that tradition machinery be dehydrated, while moisture percentage in sewage sludge exists
It is in mucilage shape when between 60%~65%, hydrone is wrapped up by one layer of colloid, this region is referred to as " the viscose glue phase region " of sludge,
It is the stage that sludge dewatering is most difficult to, is difficult further to remove with the method for traditional mechanical dehydration.So, it is necessary to take spy
Different means crack intercellular structure and sludge " viscose glue phase region " so that part " intracellular water " is discharged, then passes through machinery pressure
The mode of filter filters out.
Therefore, municipal works technical field of sludge treatment urgently demand is a kind of can be at the sludge of the uninterrupted operation of continuity
Reason system, enough solve the problems, such as in a relatively short period of time in sludge microbial cell how broken wall, to realize breaking-wall cell and
Releasing microbe cell interior water, and the utilization rate of ozone can be improved, it can be used when handling the sludge of equal volume less
Ozone and catalyst to reduce production cost, while not leaving chemical agent, heavy metal etc. to environment in treated sludge
Secondary pollution is generated, then carries out press filtration and desiccation again, and resource can be translated into, realizes that municipal sludge is innoxious, subtract
The benign cycle of quantization and recycling.
Invention content
It is to be solved by this invention be the deficiencies in the prior art, and it is an object of the present invention to provide municipal active sludge treatment catalytic body,
Sludge treating system and method for sludge treatment.
The present invention is achieved through the following technical solutions：
Municipal active sludge treatment catalytic body, for the catalytic body using stainless steel material as carrier, surface of stainless steel is negative
Supported noble metal oxide skin(coating), the metal oxide containing precious metals are solidificated in the surface of stainless steel material by way of being sintered or sputtering
On.
Preferred embodiment, the stainless steel material structure are round, rectangle or polygon tube body, are provided on the tube wall of tube body
The wall thickness of multiple through-holes, a diameter of 10mm~50mm of tube body, tube body is 0.2mm~3mm, and the length of tube body is 5mm~50mm,
A diameter of 1mm~10mm of through-hole.
Preferred embodiment, the stainless steel material structure are hollow sphere, are offered on the spherical surface of the hollow sphere multiple
The wall thickness of through-hole, a diameter of 10mm~50mm of sphere, sphere is 0.2mm~3mm, a diameter of 1mm~10mm of through-hole.
Preferred embodiment, the metal oxide containing precious metals are appointing in platinum oxide, rhodium oxide, palladium oxide, iridium oxide
It anticipates one or more.
As another aspect provides municipal active sludge processing system, which includes at least
The closed reactor of two connections, inside reactor are mounted with the municipal active sludge treatment catalytic body of the present invention；
Further include sewage pump, sewage pump is connected by the input port of pipeline and mixer, is equipped at the input port of mixer
It is passed through the admission line of ozone gas, admission line is connect with ozone generator；
Any of the closed reactor that the delivery outlet of the mixer is connected to by pipeline at least two reactor
Top connection, the mode of communicating between reactor is：The bottom of one of reactor passes through pipeline and another reactor
Top is connected to, and the bottom of another reactor is connect by pipeline with subsequent processing device, the largest hole of the reactor tap
Diameter is less than the minimum dimension of catalytic body.
The volume ratio of preferred embodiment, catalytic body and reactor in the reactor is 1~3：10.
As another aspect provides municipal activated sludge treatment method, include the following steps：
Step 1：Excess sludge in sludge-tank is entered mixer by sewage pumped, ozone is passed through in mixer
Gas and sludge carry out gas-liquid mixed, and ozone forms hydroxyl radical free radical with Hydrogenbond in water, formed ozone, hydroxyl radical free radical and
The mixture of sludge, then injects mixture in closed reactor, and being scattered in reactor has several catalytic bodies, mixing
Object inject reactor in when catalytic body by mixture impact force, under impact force action, mixture in reactor with
Catalytic body forms continuous mixing state, and ozone forms hydroxyl radical free radical, hydroxyl radical free radical in catalytic body accelerating mixture
Oxidation reaction occurs with the microorganism in ozone and sludge, reaches and kills bacterium and oxidizing microorganisms, promotes microbial cell broken
Wall and releasing microbe cell interior water realize sewage sludge harmlessness and minimizing processing；
Step 2：Sludge after oxidation is carried out mechanical dehydration, sludge is separated into the molding that moisture content is 50%-70%
Mud cake and pressing filtering liquid, the pressing filtering liquid isolated enter biochemical wastewater treatment system；
Step 3：The mud cake for being 50%~70% to moisture content generates the mud that moisture content is not more than 30% by deep dehydration
Cake；
Step 4：Mud cake to moisture content no more than 30% is granulated；
Step 5：Mud cake to moisture content no more than 30% is granulated, and the organic fertilizer of desiccation is formed after fermentation.
The step of preferred embodiment, the ozone of addition in a mixer in step 1 is mixed with sludge is specially：It uses
Not less than the gas of 80% ozone concentration, according to 10:0.1~1 volume ratio is mixed with sludge, incorporation time at 2~5 minutes,
Bacterium in sludge is killed.
The step of preferred embodiment, the ozone of addition in a mixer in step 1 is mixed with sludge is specially：It uses
Not less than the gas of 80% ozone concentration, according to 10:1~4 volume ratio is mixed with sludge, and incorporation time is right at 2~5 minutes
Microorganism in sludge is aoxidized, and is realized microbial cell broken wall and is opened micelle body, discharges in sludge in microbial cell
Portion's water.
Preferred embodiment, in step 2, the mode that mechanical dehydration is carried out to sludge is：Using diaphragm filter press, plate compression
Machine or helical compression equipment dehydration, in step 3, to moisture content be 50%~70% mud cake by way of deep dehydration
For：Using saturated vapor drying and dehydrating.
Preferred embodiment further includes the flocculant that quality is added in sludge and accounts for≤5 ‰ between the step 1 and step 2.
Compared with prior art, the present invention having the following advantages and advantages：
The present invention municipal active sludge treatment catalytic body feature be：
One：The municipal active sludge treatment catalytic body of the present invention uses stainless steel material as carrier, in stainless steel
Metal oxide containing precious metals material, this high temperature sintering or sputtering have been loaded on the surface of material by way of high temperature sintering or sputtering
Mode metal oxide containing precious metals material can be made to form compacted zone on the surface of stainless steel material, which is not easy to grind
Damage, improves its service life.
Secondly：It is most of to use particle when traditional stainless steel material carried noble metal oxide material is as catalytic body
Form is applied directly on reactor wall, and this mode so that the position of catalytic body is fixed, it is difficult to effectively with dirt
Mud contact, therefore result in can not continuous feed production fundamental issue, the present invention in order to solve continuous feed work ask
Topic, it is therefore desirable to the which so that reaction time completes within the extremely short time, and the method that the present invention solves the problems, such as this is to use：Catalysis
Body is hollow pipe structure or hollow-sphere structures, therefore in continuous feed, the impact force of flow and sludge can be from multiple
Direction is contacted with hollow catalytic body, therefore its catalytic body can be made to complete the state of high-speed mobile in reactor, into one
Step, multiple through-holes are provided in catalytic body, first can further complete the light-weight design of catalytic body, further promote catalysis
Body fast moves, simultaneously as contain a large amount of impurity in sludge, for example (,) it is hairline, polybag, fabric, sanitary paper towel, sticky
The substances such as object, grass roots, catalytic body, which is set as tubular form or hollow spheroid form and setting porous structure, to be made
Catalytic body is difficult to be intertwined with above-mentioned impurity, therefore can be effectively so that catalytic body flexibly moves in the reactor, finally
Achieve the purpose that quick catalysis, the present invention is by the above-mentioned means, so that catalysis reaction was completed within 2-5 minutes time, therefore
In the case of this time control, material can be fed with continuous work, therefore accelerate the processing of sludge.
Thirdly：It being easy to get using the catalytic body raw material of hollow pipe structure or hollow sphere structure, manufacturing cost is cheap,
It is light-weight, it is not easy to be deposited on the bottom of reactor, can be sufficiently mixed with the sludge in reactor.Tube body side wall and in
The specific surface area of bigger can be obtained by being provided with multiple through-holes on the spherical surface of empty sphere, increase sludge and the contact surface of catalytic body
Product shortens the reaction time.Catalytic body is used as carrier using stainless steel material, and stainless steel material is with excellent corrosion resistance and resistance to
Mill property, and the influence with other metal phases than being not susceptible to pH and temperature change.Stainless steel is stablized with extraordinary physics and chemistry
Property.Different from other materials based on iron, stainless steel is environment friendly material, this is because it is rustless, is not left
Sediment, service life are long.Because of this advantage, stainless steel can well be applied in various Treatment of Sludge.
In terms of ozone concentration selects the characteristics of for：The municipal activated sludge treatment method of the present invention, which uses, to be not less than
The gas of 80% ozone concentration is proportionally mixed with sludge, and since ozone has strong oxidizing property, it can not only kill sludge
In most of bacterium, the cell wall and cell membrane of microorganism in sludge can also be destroyed, a large amount of organic matters are discharged from cell
Out, organism is killed, the minimizing of sludge is realized and the harmful organism in sludge can be killed.It is mixed in ozone and sludge simultaneously
The catalytic body of solid is added when conjunction, the catalytic body of solid accelerates ozone decomposed and generates the stronger hydroxyl radical free radical of oxidability, into
One step improves the oxidation efficiency of ozone, accelerates the breaking-wall cell in sludge, so that the cellular water in cell is removed, makes subsequent
Separation of solid and liquid is relatively easy to.
In terms of reactor selects the characteristics of for：The municipal active sludge processing system of the present invention is in closed reactors
Be loaded with several catalytic bodies, catalytic body is scattered in closed reactors in a manner of free state, the catalytic body of solid with
When mixture carries out hybrid reaction in the reactor, catalytic body is by the impact force for being an externally injected into mixture, in impact force
Under effect, catalytic body comes into full contact with mixture continual continuous mixing, mixture in reactor with catalytic body.Instead
The maximum gauge of device tap is answered to be less than the minimum dimension of catalytic body, catalytic body will not arrange together with mixture from reactor
Going out, reduce the usage amount of catalytic body, improves the utilization rate of catalytic body, catalysis surface layer is rare precious metal material,
Therefore Treatment of Sludge cost is reduced.Since treated, sludge will not carry catalytic body, and treated, and sludge will not be right
Environment generates secondary pollution.The catalytic body of solid is stored in closed reactors in the way of being freely scattered, into reaction
Mixture in device can not only adequately be contacted with catalytic body, improve the utilization rate of catalytic body, shorten the reaction time, together
When can also generate fierce collide to mixture and the catalytic body in entering in reactor and mix again, simplify traditional skill
The complicated procedures of forming of mixing plant to be also separately installed in the reactor in art, reduces equipment volume, reduces production cost.Due to
Ozone is fully reacted with catalytic body in reactor, and the utilization rate of ozone is up to 95%~98% in reactor, the sludge of discharge
People and animals are had no effect, the safety of sludge treating system is improved.
The present invention municipal activated sludge treatment method the characteristics of be：Catalytic oxidation is carried out at normal temperatures and pressures, when
In do not add any medicament, murder by poisoning will not be generated to environment, while remain the organic matter in sludge, filtered sewage is to life
Change environment to have no adverse effects, the sludge that the moisture content of last output is low can be used as organic fertilizer, and meet that the Ministry of Agriculture issues has
Machine fertilizer standard really realizes the recycling of municipal sludge, can be used in the necks such as agricultural production, afforestation and soil improvement
Domain.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the process flow chart of the municipal activated sludge treatment method of the present invention；
Fig. 2 is the structural schematic diagram of the municipal active sludge processing system of the present invention；
Fig. 3 is the catalytic body structural schematic diagram of the pipe structure of the present invention；
Fig. 4 is the catalytic body structural schematic diagram of the hollow-sphere structures of the present invention.
1- sludge-tanks, 2- sludge pumps, 3- mixers, 4- ozone generators, 5a- first reactors, 5b- second reactors,
5c- third reactors, 6- catalytic bodies, 61- tube bodies, 62- through-holes, 63- hollow spheres.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
With reference to shown in Fig. 3, municipal active sludge treatment catalytic body, catalytic body 6 is using stainless steel material as carrier, stainless steel
Material area load is preferably but not limited to the metal layer for platinum oxide, can also use rhodium oxide, palladium oxide, iridium oxidation etc.
Metal oxide containing precious metals.Platinum is solidificated in by way of being sintered or sputtering on the surface of stainless steel material.Stainless steel material structure is excellent
It is selected as round tube body 61, multiple through-holes 62, a diameter of 30mm of tube body 61 are provided on the tube wall of tube body 61, the wall thickness of tube body is
The length of 1.5mm, tube body are 25mm, a diameter of 5mm of through-hole.The determination of the diameter, wall thickness, length of tube body 61 is with catalytic body 6
Under the impact force action for the mixture that reactor can be entered in the reactor, mixture in reactor with 6 shape of catalytic body
At continuous mixing state.
With reference to shown in Fig. 4, municipal active sludge treatment catalytic body, catalytic body 6 is using stainless steel material as carrier, stainless steel
Material area load is preferably but not limited to the metal layer for platinum oxide, can also use rhodium oxide, palladium oxide, iridium oxidation etc.
Metal oxide containing precious metals.Platinum is solidificated in by way of being sintered or sputtering on the surface of stainless steel material.Stainless steel material structure is excellent
It is selected as hollow sphere 63, is provided with multiple through-holes 62 on the spherical surface of hollow sphere 63, a diameter of 40mm of hollow sphere 63, sphere
Wall thickness is 2mm, a diameter of 5mm of through-hole.The determination of the diameter, wall thickness of hollow sphere 63 can be in the reactor with catalytic body 6
It is entered under the impact force action of the mixture of reactor, mixture forms continuous mix with catalytic body 6 in reactor and stirs
Mix state.
Operation principle：This catalytic body 6 uses stainless steel material for carrier, passes through high temperature sintering on the surface of stainless steel material
Or the mode of sputtering has loaded metal oxide containing precious metals material, the mode of this high temperature sintering or sputtering can make Precious metal oxidation
Object material forms compacted zone on the surface of stainless steel material, and the catalytic body 6 is not easy to wear, improves its service life.This catalysis
Body 6 uses hollow pipe structure or hollow sphere structure, is provided on 61 side wall of tube body and on the spherical surface of hollow sphere 63 more
A through-hole 62.Catalytic body 6 is used as raw material, the raw material to be easily worked and make using hollow tube body 61 and hollow sphere 63, in
Empty tube body 61 is punched after 304 stainless steel tube excision formings may be used, curved after 304 stainless steel plates can also being used to punch
Song is at circular tube body.The identical semicircle hollow ball docking composition of two radiuses may be used in hollow sphere 63.This catalysis
6 manufacturing cost of body is cheap, light-weight, and the contact area between multiple catalytic bodies 6, between catalytic body 6 and reactor is small, is using
When catalytic body 6 be not easy to be deposited on the bottom of reactor, can be sufficiently mixed with the sludge in reactor.It is provided in catalytic body 6
Multiple through-holes 62 can obtain the specific surface area of bigger, increase the contact surface of sludge and catalytic body 6, shorten the reaction time, together
When further alleviate the weight of itself of catalytic body 6, exacerbate catalytic body 6 and be mixed object and roll in reactor and upper and lower
The speed moved back and forth.
For catalytic body 6 using stainless steel material as carrier, stainless steel material has excellent corrosion resistance and wearability, and
And the influence with other metal phases than being not susceptible to pH and temperature change.Stainless steel has extraordinary physical and chemical stability.Because
It is rustless, does not leave sediment, and service life is long, because of this advantage, stainless steel can be in various Treatment of Sludge
It is applied well.It is not easy to be intertwined with the substance in mixture using the catalytic body 6 of this structure, due in sludge
Contain these impurity such as much not degradable impurity, such as hairline, polybag, fabric, sanitary paper towel, dope, grass roots
It is easy to wind with other objects, this catalytic body 6 is using round pipe structure and hollow-sphere structures, regular shape, surface
It is smooth, it can greatly reduce and winding probability occurs with this substance, its catalysis with ozone is influenced after avoiding catalytic body 6 from being wound
Efficiency.This catalytic body 6 generates collision and friction between each other in the reactor, and sludge is difficult to be attached on the surface of catalytic body 6,
The problem of slowing down the decomposition of ozone caused by the combination that catalytic body 6 and ozone will not be completely cut off removes catalysis without shutting down
The attachment on 6 surface of body, reduces plant maintenance difficulty.
With reference to shown in Fig. 2, municipal active sludge processing system, the sludge treating system applies catalytic body of the present invention
6 realize the sludge treating system of continuous sex works, which includes sewage pump 2, and sewage pump 2 is defeated by pipeline and mixer 3
Entrance connects, and the admission line for being passed through ozone gas is equipped at the input port of mixer 3, and admission line connects with ozone generator 4
It connects, the delivery outlet of mixer 3 is connect by pipeline with the top of first reactor 5a in the closed reactor of three connections, instead
It is that the bottom of first reactor 5a is connected to by pipeline with the top of second reactor 5b to answer the mode of communicating between device, second
The bottom of reactor 5b is connected to by pipeline with the top of third reactor 5c, and the third bottoms reactor 5c are by pipeline and subsequently
Processing equipment connects, and being scattered in first reactor 5a, second reactor 5b, third reactor 5c has several catalytic bodies 6,
The maximum diameter of hole of the tap of first reactor 5a, second reactor 5b, third reactor 5c is less than the minimum dimension of catalytic body.
The volume ratio of catalytic body 6 and reactor in first reactor 5a, second reactor 5b, third reactor 5c is 1：10.
Operation principle：Excess sludge in sludge-tank 1 is transported to mixer 3 by the sludge pump 2 of this system by pipeline
Input port is equipped with the admission line for being passed through ozone gas in the input port of mixer 3, and admission line is connect with ozone generator 4,
Negative pressure is generated to the pipeline of entering of ozone gas when mixer 3 generates sludge flowing, ozone gas is entered by admission line
It is mixed with sludge in mixer 3.Ozone occurs initial reaction with water in sludge and decomposites hydroxyl radical free radical, mixer 3
Delivery outlet output ozone gas, hydroxyl radical free radical, sludge mixture.Mixer 3 is transported to mixture by pipeline close
In the first reactor 5a closed.Mode of communicating between reactor is that the bottom of first reactor 5a is anti-by pipeline and second
The top of device 5b is answered to be connected to, the bottom of second reactor 5b is connected to by pipeline with the top of third reactor 5c, third reaction
The bottoms device 5c are connect by pipeline with subsequent processing device.Connection may be implemented continuously in this manner between three reactors
Property operation, until the bacterium in sludge is killed and is discharged after releasing microbial cell internal water completely.
This system adds catalytic body in closed first reactor 5a, second reactor 5b, third reactor 5c
6, catalytic body 6 is scattered in closed reactors in a manner of free state, and catalytic body 6 is mixed in the reactor with mixture
When closing reaction, catalytic body 6 is by the impact force for being an externally injected into mixture, under the action of impact force, catalytic body 6 and mixture
The continual continuous mixing in reactor, ozone in mixture and catalytic body 6 come into full contact with it is rapid produce it is more
The stronger hydroxyl radical free radical of oxidability, the strong oxidizing property of hydroxyl radical free radical can be in a short period of time to thin in sludge
Bacterium is killed, and is decomposed to the cell of microorganism, greatly reduces the time of Treatment of Sludge, improves Treatment of Sludge
Efficiency.The maximum gauge of three reactor taps be less than catalytic body minimum dimension, catalytic body 6 will not together with mixture from
It is discharged in reactor, reduces the usage amount of catalytic body 6, improve the utilization rate of catalytic body 6.6 surface layer of catalytic body is rare
Precious metal material, therefore reduce the use cost of catalytic body 6.Since treated, sludge does not carry out catalytic body 6,
Treated, and sludge will not generate secondary pollution to environment.Catalytic body 6 is stored in closed reaction in the way of being freely scattered
It in device, can not only adequately be contacted with catalytic body 6 into the mixture in reactor, improve the utilization rate of catalytic body 6,
Shorten the reaction time, while fierce collision can also be generated with catalytic body 6 to the mixture in entering in reactor and carried out again
Mixing simplifies the complicated procedures of forming that also separately install mixing plant in traditional technology in the reactor, reduces equipment volume, drop
Low production cost.Since ozone is fully reacted with catalytic body in the reactor, the utilization rate of ozone is up to 95% in reactor
~98%, the sludge of discharge has no effect people and animals, improves the safety of sludge treating system.
Shown in referring to Figures 1 and 2, present invention municipal administration activated sludge treatment method the treating method comprises following steps：
Step 1：Excess sludge in sludge-tank 1 is entered mixer 3 by the extraction of sewage pump 2, is passed through in mixer 3
Ozone gas carries out gas-liquid mixed with sludge, and ozone forms hydroxyl radical free radical with Hydrogenbond in water, forms ozone, hydroxyl free
The mixture of base and sludge, then injects mixture in closed reactor, and being scattered in reactor has several catalytic bodies
6, catalytic body 6 is by the impact force of mixture when injecting in reactor for mixture, and under impact force action, mixture is reacting
Continuous mixing state is formed in device with catalytic body 6, catalytic body 6 accelerates ozone to form hydroxyl radical free radical, hydroxyl radical free radical
Oxidation reaction occurs with the microorganism in ozone and sludge, reaches and kills bacterium and oxidizing microorganisms, promotes microbial cell broken
Wall and releasing microbe cell interior water realize sewage sludge harmlessness and minimizing processing.
The concrete mode of addition ozone is in mixer 3：Using the gas not less than 80% ozone concentration, according to 10:
When 0.1 volume ratio is mixed with sludge, in 3 minutes or so reaction time, the bacterium in sludge is killed.When use is not less than
The gas of 80% ozone concentration, according to 10:When 1 volume ratio is mixed with sludge, 3 minutes or so the reaction time, in sludge
Microorganism is decomposed, and is realized breaking-wall cell and is opened micelle body, discharges microbial cell internal water in sludge.Principle is：
Since ozone has extremely strong oxidisability, and reaction speed is fast, in low concentration can transient response, sterilizing ability is the hundreds of of chlorine
Times, sludge and phenol stink, non-secondary pollution are not generated.And ozonization is efficient, has to various viruses, bacterium very strong
Killing ability, moreover it is possible to which taste removal, improves water quality at decoloration.Ozone belongs to bacteriolysant, can be destroyed or be dissolved micro- in sludge using ozone
The cell wall of biology is rapidly diffused into cell interior, and Oxidative demage desmoenzyme, making cell that penetrating sex distortion occur leads to it
Dissolving is dead.When using the gas not less than 80% ozone concentration, according to 10:When 4 or more volume ratio is mixed with sludge, the time
More than 4 hours, to the microorganism in sludge deep reaction can occur for ozone, by a large amount of microorganism decomposition at carbon dioxide and
Water, sludge total amount highest can reduce by 40%, and sludge is desertified, although can achieve the purpose that mud decrement, in sludge
Organic matter disappears, therefore is unfavorable for that treated sludge renewable resources utilize.
The concrete mode of progress catalytic oxidation is in the reactor：It is placed with catalytic body 6, catalytic body in reactor memory
6 are adequately contacted with mixture, and catalytic body 6 can be combined with mixture during contact with the ozone in mixture,
Accelerate ozone to form the stronger hydroxyl radical free radical of oxidability, forms the smelly of ozone direct oxidation and hydroxyl radical free radical indirect oxidation
Oxygen catalytic oxidation system.Hydroxyl radical free radical decomposes macromolecular microorganism difficult to degrade, since hydroxyl radical free radical is extremely strong
Oxidisability can release a large amount of heat in oxidation reaction, this partial heat can be such that water temperature increases, for etc. macromolecular to be oxidized
The reaction of microorganism provides suitable temperature environment, causes lasting reaction, forms cycle chain effect, promotes macromolecular micro-
Biology is increasingly oxidized easily.For the degradation of small molecule microorganism, hydroxyl radical free radical can without selection and sludge
In degradable small molecule microorganism redox reaction occurs, be degraded to carbon dioxide and water within a short period of time.
Step 2：Sludge after catalysis oxidation is transported to diaphragm filter press and carries out press dewatering, diaphragm filter press is sludge
It is separated into molding mud cake and pressing filtering liquid that moisture content is 60% or so, the pressing filtering liquid isolated enters biochemical wastewater treatment system,
Reach separation of solid and liquid state.
Step 3：The mud cake for being 60% or so to moisture content generates the mud cake that moisture content is not more than 30% by deep dehydration,
Deep dehydration uses saturated vapor heat drying, forms the mud cake that moisture content is not more than 30%, and the saturated vapor after use passes through
Condenser cools down, and condensed water caused by condenser enters sewage disposal system, and exhaust gas entrance caused by condenser is useless
Gas processing system discharges after being handled.
Step 4：Mud cake to moisture content no more than 30% is granulated, and forms graininess soil property.
Step 5：Fermentation forms the organic fertilizer of desiccation after mud cake to moisture content no more than 30% is granulated.
It is 5 ‰ flocculants that preferred embodiment scheme, which further includes to mixed weight accounting in sludge between step 1 and step 2,
Flocculant can make the solid suspended particle of not free settling in sludge liquid agglomerate and precipitate, and facilitate subsequent press dewatering.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. municipal active sludge treatment catalytic body, which is characterized in that the catalytic body is using stainless steel material as carrier, stainless steel
Expect that area load noble metal oxide layer, the metal oxide containing precious metals are solidificated in stainless steel material by way of being sintered or sputtering
Surface on.
2. municipal administration active sludge treatment catalytic body according to claim 1, which is characterized in that the stainless steel material structure
For round or rectangle or polygon tube body, multiple through-holes, a diameter of 10mm~50mm of tube body, pipe are provided on the tube wall of tube body
The wall thickness of body is 0.2mm~3mm, and the length of tube body is 5mm~50mm, a diameter of 1mm~10mm of through-hole.
3. municipal administration active sludge treatment catalytic body according to claim 1, which is characterized in that the stainless steel material structure
For hollow sphere, multiple through-holes, a diameter of 10mm~50mm of sphere, the wall of sphere are offered on the spherical surface of the hollow sphere
Thickness is 0.2mm~3mm, a diameter of 1mm~10mm of through-hole.
4. municipal administration active sludge treatment catalytic body according to claim 1, which is characterized in that the metal oxide containing precious metals are
Any one or more in platinum oxide, rhodium oxide, palladium oxide, iridium oxide.
5. municipal active sludge processing system, which is characterized in that
The sludge treating system includes the closed reactor of at least two connections, and inside reactor is mounted with claim 1-4
Catalytic body described in any one；
Further include sewage pump, sewage pump is connected by the input port of pipeline and mixer, is equipped with and is passed through at the input port of mixer
The admission line of ozone gas, admission line are connect with ozone generator；
The top of any of the closed reactor that the delivery outlet of the mixer is connected to by pipeline at least two reactor
Portion connects, and the mode of communicating between reactor is：The top that the bottom of one of reactor passes through pipeline and another reactor
Connection, the bottom of another reactor are connect by pipeline with subsequent processing device, and the maximum diameter of hole of the reactor tap is small
In the minimum dimension of catalytic body.
6. municipal administration active sludge processing system according to claim 5, which is characterized in that the catalytic body in the reactor
Volume ratio with any one reactor is 1~3：10.
7. based on the method for sludge treatment of the municipal active sludge processing system described in claim 5-6 any one, feature
It is, includes the following steps：
Step 1：Excess sludge in sludge-tank is entered mixer by sewage pumped, ozone gas is passed through in mixer
Gas-liquid mixed is carried out with sludge, ozone forms hydroxyl radical free radical with Hydrogenbond in water, forms ozone, hydroxyl radical free radical and sludge
Mixture, then mixture is injected in closed reactor, being scattered in reactor has several catalytic bodies, mixture to exist
Inject reactor in when catalytic body by mixture impact force, under impact force action, mixture in reactor with catalysis
Body forms continuous mixing state, and ozone forms hydroxyl radical free radical in catalytic body accelerating mixture, hydroxyl radical free radical and smelly
Oxidation reaction occurs for the microorganism in oxygen and sludge, reaches and kills bacterium and oxidizing microorganisms, promote microbial cell broken wall and
Releasing microbe cell interior water realizes sewage sludge harmlessness and minimizing processing；
Step 2：Sludge after oxidation is carried out mechanical dehydration, sludge is separated into the molding mud cake that moisture content is 50%-70%
And pressing filtering liquid, the pressing filtering liquid isolated enter biochemical wastewater treatment system；
Step 3：The mud cake for being 50%~70% to moisture content generates the mud cake that moisture content is not more than 30% by deep dehydration；
Step 4：Mud cake to moisture content no more than 30% is granulated；
Step 5：Mud cake to moisture content no more than 30% is granulated, and the organic fertilizer of desiccation is formed after fermentation.
8. it is according to claim 7 municipal administration activated sludge treatment method, which is characterized in that in step 1 in mixer
The step of middle addition ozone is mixed with sludge be specially：Using the gas not less than 80% ozone concentration, according to 10:0.1
~1 volume ratio is mixed with sludge, and incorporation time is 2~5 minutes in the reactor, is killed to the bacterium in sludge.
9. it is according to claim 7 municipal administration activated sludge treatment method, which is characterized in that in step 1 in mixer
The step of middle addition ozone is mixed with sludge be specially：Using the gas not less than 80% ozone concentration, according to 10:1~4
Volume ratio mixed with sludge, in the reactor incorporation time be 2~5 minutes, the microorganism in sludge is aoxidized, realize
Microbial cell broken wall and opening micelle body, discharge microbial cell internal water in sludge.
10. it is according to claim 7 municipal administration activated sludge treatment method, which is characterized in that in step 2, to sludge into
The mode of row mechanical dehydration is：It is dehydrated using diaphragm filter press, plate and frame filter press or helical compression equipment, in step 3, to containing
The mud cake that water rate is 50%~70% is by way of deep dehydration：Using saturated vapor drying and dehydrating.
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| CN112028416A (en) * | 2020-08-26 | 2020-12-04 | 沈阳理工大学 | Cutting mixed catalytic oxidation sterilizer and septic tank sludge comprehensive utilization method |
| CN115215488A (en) * | 2022-09-19 | 2022-10-21 | 广州海洋地质调查局三亚南海地质研究所 | Environment-friendly treatment system for treating wastewater and sludge of sea-land junction key zone |
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