CN103492325A - Sludge-concentrating method and apparatus - Google Patents
Sludge-concentrating method and apparatus Download PDFInfo
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- CN103492325A CN103492325A CN201280020481.1A CN201280020481A CN103492325A CN 103492325 A CN103492325 A CN 103492325A CN 201280020481 A CN201280020481 A CN 201280020481A CN 103492325 A CN103492325 A CN 103492325A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Abstract
Provided is a process and an apparatus capable of easily concentrating sludge to high concentrations. The sludge-concentrating method includes: a residue separation step that separates the sludge into residue and sludge from which has residue has been removed; a chemical blending/flocculating step that blends chemicals into the sludge from which residue has been removed; and a concentrate separation step that separates solids and liquids in the concentrated sludge produced by the chemical blending/flocculating step into thickened sludge and separated liquid. The sludge-concentrating apparatus includes a residue separation unit that separates the sludge into residue and sludge from which residue has been removed, a chemical blending/flocculating unit that blends chemicals into the residue-removed sludge, and a concentrate separation unit that separates solids and liquids in the concentrated sludge produced by the chemical blending/flocculating unit into concentrated sludge and separated liquid.
Description
Technical field
The present invention relates to sludge concentration method and device, relate in particular to method and the device of the pre-treatment that is suitable as Anaerobic Digestion.
Background technology
The Anaerobic Digestion of mud is compared with aerobic treatment, the sludge creation amount is few, pathogenic micro-organism, parasitic ovum also can kill rapidly and stabilization, due to the supply that does not need oxygen, therefore power consumption is also few, the biogas that also can to obtain take methane gas be principal constituent, therefore as energy-conservation treatment process, is the technology that has been used a very long time.On the other hand, anaerobic digestion groove equipment need to be made as large capacity, is also the large technology of burden of drug expenditure in the processing of digested sludge.
Therefore, as existing method for sludge treatment, that mud is a lot of in addition with regard to the example of example, dehydration the burning disposal of dehydration landfill without anaerobic digestion.For example, as the anaerobic treatment of existing mud, can list the anaerobic treatment shown in the FB(flow block) shown in Fig. 2.This flow process is described.
On the other hand, proposed the treatment process of a kind of human excrement, rubbish from cooking, mud in patent documentation 1, this treatment process has: (a) pretreatment procedure, the human excrement solid-liquid separation of its mud that will adulterate; (b) anaerobic digestion operation, it will not dewater with regard to directly anaerobic digestion by isolated solid matter in treatment process; (c) anaerobic digestion operation, it will contain the rubbish from cooking anaerobic digestion of plant and animal residue and solid matter; (d) dehydration procedure, it is separated into solid matter and Separation of Water by the dehydration of anaerobic digestion operation effluent liquid; (e) biologic treatment process, it is by the Separation of Water of pretreatment procedure, from Separation of Water bio-oxidation, the denitrogenation of dehydration procedure, by this treatment process, process mud, the human excrement such as mud, purification tank mud for the treatment of of Organic Wastewater facility, the rubbish from cooking that contains plant and animal residue energy-conservationly, and by the antihygienic screening reject in human excrement, purification tank mud wholesomely compost solid fuel.
A kind of method for sludge treatment and system thereof have been proposed in patent documentation 2, the primary sludge that it produces the primary sedimentation pond from sewage treatment equipment and the excess sludge produced from final tank mix and store, add flocculation agent and carry out flocculation treatment one time in this mixing sludge, the mixing sludge that then will complete a flocculation treatment be take the mode that its sludge concentration is 6～8% and is carried out concentration, then in the mixing sludge after concentration, add flocculation agent and carry out the secondary flocculation treatment, and then the mixing sludge that has carried out the secondary flocculation treatment is implemented to processed, by such treatment process, these two kinds of mud of the primary sludge that will be produced by wastewater treatment and excess sludge concentration in a system, and be concentrated into sludge concentration best for follow-up dehydration procedure and maintain, thereby bring into play to greatest extent the concentrated total efficiency reached in dehydration of these wastewater sludges.
In addition, the slit-type thickner of squeezing effect is pressed in the transport capacity and the increase that have proposed the raising equipment for separating liquid from solid in patent documentation 3.
The prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication hei 10-216785 communique
Patent documentation 2: TOHKEMY 2009-90240 communique
Patent documentation 3: TOHKEMY 2003-211293 communique
Summary of the invention
the problem that invention will solve
In existing mud enrichment process, in early stage, the screening reject more than particle diameter 3～4mm is removed by other approach before concentrated, the screening reject by particle diameter below it directly is supplied to enrichment process, concentrated together with mud.
As concentration method, can list by utilize gravity make sludge settling the gravity concentration method, utilize the moisture make in mud by and the banded screen cloth that do not make solid matter pass through with method of enrichment, utilize the mechanical method of enrichment such as centrifugal concentrating method of the solid-liquid separation based on centrifugal force.The gravity concentration method does not concentrate mud with usually not offeing medicine.But, in order to ensure enrichment factor, be that about 2～3 times ground improve concentration rate, need to guarantee the residence time fully, therefore be provided with extremely jumbo thickener.Perhaps, needing to add liquid, therefore, is unpractical as the method that obtains high concentration sludge.In addition, in existing mechanical method of enrichment, in order to improve the solid matter rate of recovery, need a large amount of liquids, need to be for a large amount of high pressure cleaning water of the cleaning of band with method of enrichment.In addition, there is the problem in order to make to have put into the container high-speed rotary of mud then to need great power in the centrifugal concentrating method.
In addition, expect to contribute to the improvement of further shortening the HRT of existing Anaerobic Digestion as above and making the concentration technique of the mud digestive shelf miniaturization, anaerobic digestion.
And then there are the problems such as dehydration property deterioration of the mud after Anaerobic Digestion in prior art, expect for tackling the effective means of this problem.
Problem of the present invention is, method and the device that can simply mud be concentrated into to high density are provided.
for the scheme of dealing with problems
The present invention is as follows.
1) a kind of sludge concentration method, it comprises: the screening reject separation circuit is separated into mud screening reject and removes slag sludge; Liquid mixes/flocculates operation, admixing medical solutions in removing slag sludge; And the concentrating and separating operation, will mix/flocculate the flocculation mud solid-liquid separation generated in operation at liquid is thickened sludge and parting liquid.
2) a kind of sludge concentration device, it comprises: the screening reject separated part is separated into mud screening reject and removes slag sludge; Mix/flocculation of liquid section, admixing medical solutions in removing slag sludge; And concentrating and separating section, the flocculation mud solid-liquid separation generated in will mix at liquid/flocculation section is thickened sludge and parting liquid.
Maximum of the present invention is characterised in that, in the screening reject separation circuit, is being separated into screening reject and during except slag sludge, and the inclusion that comprises the macrofiber shape that screening reject that particle diameter that prior art can't remove is little and hair equal diameter are little is removed in the lump interior.The slag sludge that removes obtained together with screening reject compared with prior art is sufficiently removed, therefore, can not produce the mechanical faults such as winding to rotating part in enrichment process, can obtain to hang down power the thickened sludge of high density, by isolated screening reject is mixed with the anaerobically digested sludge of back segment, can improve dehydration property.
the effect of invention
According to the present invention, can utilize the device of saving space, low power that mud is concentrated, can be used for other operation using isolated screening reject as chemical conditioner or preserve and the sludge treatment for expecting when expectation.
The accompanying drawing explanation
Fig. 1 is the explanatory view of an example of the concentrating unit that comprises the embodiment for implementing method of the present invention.
Fig. 2 means the explanatory view of the formation of existing treatment unit.
Fig. 3 is that the back segment that is illustrated in the mud separated part has the anaerobic digestion groove, digested sludge mixed and turns back to the explanatory view of the embodiment of anaerobic digestion groove with thickened sludge.
Embodiment
The mud of discharging in the operation of the organic substances such as in the present invention, mud refers to disposing of sewage, human excrement, rubbish from cooking.As this mud, can list primary sludge, excess sludge etc.
In the present invention, screening reject refers to from the isolated material of above-mentioned mud, its comprise take that the sewage test method is benchmark with the isolated thick suspended substance of specified size 74 μ m sieve, be preferably that particle diameter 0.5mm is above or particle diameter 2.0mm is above or utilize the porous plate that aperture 0.5mm is above or aperture 2.0mm is above or there is the isolated thick suspended substance of screen cloth of 60～100 purpose wire nettings.
Herein, particle diameter refers to that aperture is the diameter of finger-hole by the value of sieve classification.
At first, to mud being separated into to screening reject and describing except the screening reject separation circuit of slag sludge.
To the operation in the screening reject separation circuit, screening reject contained in mud being separated, reclaims, and this operation in the device that uses describe.
It is mud that screening reject is wanted separated mud, and SS is more than 5g/L (liter) usually.
The separation of screening reject basically can or be filtered mud according to expectation by the screen section with the aperture that is less than the particle diameter of wanting separation and carry out by the particle diameter according to screening reject.For example, usually, when the ratio of the primary sludge that the content of screening reject is many is high, use the above-mentioned central thicker screen cloth of mesh, when the ratio of the poor excess sludge of screening reject is high, uses the thin screen cloth of mesh, but be not limited to this.
As this screen section, can list the screen cloth of above-mentioned porous plate or use wire netting etc.
For for separating of being screening reject and except the form of the screening reject separated part of slag sludge, be not particularly limited, for example, preferably there is scalping (raking) device of isolated screening reject, for the vibrating mechanism of the obstruction that prevents above-mentioned screen section etc.
Then, above-mentioned liquid being mixed/flocculate operation describes.
In the application, liquid refers to the reagent that at least comprises flocculation agent, also can comprise other reagent beyond flocculation agent, such as pH adjusting agent etc.In addition, liquid is not limited to liquid.Liquid can by only with flocculation agent, mix with flocculation agent and other reagent or be provided with being used in combination of time difference etc. and use.
This liquid mixes/flocculates in operation, removes slag sludge by least injecting flocculation agent and being mixed, thus preparation flocculation mud.For mix/flocculation of the liquid section except the agent of slag sludge mixed flocculation is generally the flocculation mixing tank with flocculation agent injection unit at this, as long as can prepare flocculation mud, just can use and there is simple pipe or the tubular body arranged inside that flocculation agent injects unit.In addition, mix/flocculation of liquid section can have for holding the flocculation agent hold-up vessel of the material that quantitatively is dissolved with flocculation agent, can be by from this tank, flocculant solution being injected into except carrying out slag sludge to the flocculation mixing tank.The method can, without injecting flocculation agent lavishly, be efficiently preferred.
Liquid mixes/flocculates the addition of the flocculation agent in operation with respect to the SS (suspended solids in mud; Suspended Solid) quality optimization is 0.2～1.0%, more preferably 0.3～0.6%.
As flocculation agent, be not particularly limited, (for example can list inorganic based flocculating agent, bodied ferric sulfate or PAC, Tai-Ace S 150 etc.) and organic polymer coargulator (following also referred to as polymeric flocculant) etc., can be used singly or in combination respectively, but preferably at least comprise polymeric flocculant.As polymeric flocculant, can list positively charged ion system, negatively charged ion system, both sexes system etc., such as listing amidine based flocculating agent, acrylamide based flocculating agent, acrylic acid series flocculation agent etc.
Then, to mixing/flocculate the concentrating and separating operation that the flocculation mud solid-liquid separation for preparing in operation is thickened sludge and parting liquid at liquid, describe.
In the present invention, as mentioned above, in this concentrating and separating operation, by the mud solid-liquid separation of flocculating, can prepare the thickened sludge of high density.
Herein, as the concentrating and separating section that is thickened sludge and parting liquid for the mud solid-liquid separation of flocculating, be not particularly limited, can list the simple groove of application of weight method of enrichment, the separating centrifuge of application centrifugal concentrating method, the separating machine of application suspension method of enrichment, the separating machine of use screen cloth etc.Wherein, preferred slit-type thickner, for example, can list the following physical structure of record in aforementioned patent document 3: handled thing is accepted with slit plate, circumferential surface is protruded at a plurality of plectanes that are formed with on the slit plate of a plurality of slits and discharges on direction and rotate around rotating shaft eccentric at handled thing, thereby handled thing is transported to the discharge side on slit plate, in this process, liquid component from slit and plectane between gap fall and be filtered, the separated collection of solids component in handled thing, and then on the basis of these means, be provided with on above-mentioned slit plate and approach with the upper surface of slit plate and along the discharge direction rotation of handled thing and squeeze the conveying belt that gleanings on slit plate takes off liquid.During application slit-type thickner, can be reliablely and stablely highly enriched, for example, the high densityization of 4～12 quality % can realize by cheap running cost.
Above-mentioned in the concentrating and separating operation isolated thickened sludge can be supplied to the treatment process of expectation, implement to process arbitrarily.
As for reclaiming thickened sludge and, to the thickened sludge supply unit for the treatment of unit weight feed, preferably thering is the integrated pump formed of quantification unit and supply unit, such as listing the one-piece type single-shaft-screw pump of feeder etc.But, in the middle of sludge concentration device of the present invention, by be arranged at the top of anaerobic digestion groove to the concentrated section of major general's mud, also can be by the thickened sludge of discharging from concentrated section directly or be situated between and fall and put into digestive shelf by worm conveyor.Now, owing to not needing to drop into pump etc., so the low motorization of this part becomes possibility.
In addition, when the treatment process of latter stage is the digestion operation, as shown in Figure 3, make the extraction pipe arrangement branch of digested sludge, setting turns back to the pipe arrangement of anaerobic digestion groove, in its way, thickened sludge and digested sludge mixed and drop into, thereby can reduce to concentration and the viscosity of the input mud of anaerobic digestion groove, also can reduce and drop into required pump power.
In addition, part or all of the parting liquid obtained by the mud solid-liquid separation of flocculating in this concentrating and separating operation may be mixed in to arbitrarily in treatment process.Now, parting liquid also can mix also and can not mix with above-mentioned screening reject.
Then, below enumerate the example as the pre-treatment of Anaerobic Digestion by mud concentration technique of the present invention.
In present embodiment, the screening reject that will be obtained by the screening reject separation circuit is for improving the dehydration property of the mud after Anaerobic Digestion.Reclaimed screening reject for example, except adding liquid in slag sludge and mix and after preparation, simmer down to high density (, 4～12 quality %).Will be in concentration process isolated parting liquid all amount or a part and in leading portion isolated screening reject be mixed together in the anaerobically digested sludge after Anaerobic Digestion, be supplied to the processed operation.
In the concentrating and separating operation, isolated thickened sludge is imported into the anaerobic digestion operation.Prior art concentrates mud concentrated by gravity concentration or various machinery, but to the concentration of the mud of supplying with in the anaerobic digestion operation be actually 3～4%, the highest only 5% left and right.In addition, the screening reject in mud does not have separated in enrichment process, therefore, is directed to the anaerobic digestion operation together with mud, and by Anaerobic Digestion, its major part is decomposed.
As mentioned above, the mud (except slag sludge) that has reclaimed screening reject is delivered to liquid and mixes/flocculate operation, by whole amounts of the screening reject that separates and reclaim or a part ofly mix with the anaerobically digested sludge after Anaerobic Digestion.Now, when anaerobically digested sludge is further implemented to utilize the processing of flocculation agent, to the opportunity of adding screening reject in this digested sludge according to the condition such as the aperture of the particle diameter of screening reject and the unit of flocculation mud for separating of generating by flocculation agent and different, can before and after the interpolation at flocculation agent, add or add these two opportunitys simultaneously and suitably select with flocculation agent, also can be used in combination this two opportunitys.When being added on of this screening reject added after flocculation agent, preferably, during at least being processed by dehydration procedure at the flocculation mud of this generation in or before it, screening reject is added in this flocculation mud.
The screening reject of this recovery also can be implemented drying treatment etc. according to expectation, is preserved.
As mentioned above isolated thickened sludge in above-mentioned concentrating and separating operation is supplied with to the anaerobic digestion operation.In the time of the concentrated section of mud can being arranged to the top of anaerobic digestion groove, the thickened sludge be discharged from is directly put into digestive shelf due to gravity, the concentrated section of mud can not be arranged in the situation on top of anaerobic digestion groove, preferably, comprise and can reclaim thickened sludge and supply with operation, the Anaerobic Digestion that can carry out more efficient operational management to the thickened sludge of anaerobic digestion operation weight feed.
As reclaiming thickened sludge and, for example to the thickened sludge supply unit of anaerobic digestion device weight feed, can list the integrated said pump formed of quantification unit and supply unit etc.
In addition, in may be mixed in to by part or all of the parting liquid that obtains in the mud solid-liquid separation of flocculating in this concentrating and separating operation the anaerobically digested sludge obtained by the anaerobic digestion operation.Now, parting liquid can mix also and can not mix with above-mentioned screening reject.
The digested sludge of the thickened sludge of processing in the anaerobic digestion operation as mentioned above can be further by flocculation agent, process together with screening reject according to expectation, but, under this state, M basicity is high, utilize the processing of flocculation agent to become difficult, therefore preferably diluted, this dilution can be used parting liquid.Now, the screening reject of interpolation can mix also and can not mix with above-mentioned parting liquid.
In addition, this parting liquid is owing to comprising phosphorus, calcium, siloxanes etc., and the operation that therefore also can be returned to for reclaiming them is reclaimed.
Then, with reference to accompanying drawing, an example of the present invention is further described.
Fig. 1 is the FB(flow block) that embodiments of the present invention are shown.Liquid mix/flocculation section and the concentrated section 4 of mud that sludge concentration device of the present invention at least has screening reject separated part 1, comprises flocculation mixing tank 2 and liquid medicine storage tank 3.At first, mud is delivered to screening reject separated part 1, is separated into screening reject and removes slag sludge.Then, will be transported to flocculation mixing tank 2 by pipe arrangement except slag sludge is situated between, in this pipe arrangement way or in flocculation mixing tank 2, the liquid of interpolation liquid medicine storage tank 3, flocculated/prepared.The mud flocculated is imported to the concentrated section 4 of mud, be separated into thickened sludge and the parting liquid of high density.Thickened sludge is situated between and is supplied to pump by the supplying machine that is assemblied in thickened sludge transferpump 5, be transported to quantitatively the anaerobic digestion operation of latter stage.In addition, will the isolated screening reject of screening reject separated part with at the mud concentrating part, from the parting liquid gone out, in screening reject/parting liquid Receiving bin 6, mix, mix with digested sludge after Anaerobic Digestion and be supplied to dehydration procedure.
Fig. 3 is the FB(flow block) that the back segment that is illustrated in concentrating and separating section 4 is provided with the embodiment of anaerobic digestion groove 7.In concentrating and separating section 4, isolated thickened sludge is formed anaerobically digested sludge by anaerobic digestion in anaerobic digestion groove 7, is situated between and is extracted by digested sludge extraction pipe arrangement 10a.In digested sludge extraction pipe arrangement 10a top set, having digested sludge to return uses pipe arrangement 10b, the anaerobically digested sludge of at least a portion is turned back to anaerobic digestion groove 7.Return with the tempering tank 9 be provided with on pipe arrangement 10b for thickened sludge is mixed with anaerobically digested sludge in digested sludge, the mud mixed is supplied to anaerobic digestion groove 7.In illustrated embodiment, used for the mixture by thickened sludge or thickened sludge and anaerobically digested sludge and be supplied to the input pump 8 of anaerobic digestion groove 7 and extract pump 10 for the mud that extracts anaerobically digested sludge from anaerobic digestion groove 7, if but could utilize deadweight to supply with or extract mud, would not do not need pump.
Embodiment
Embodiments of the invention below are described.The sewage sludge produced by the A sewage farm is carried out to mud concentration test of the present invention according to the embodiment of Fig. 1.Sewage sludge for test is the mud gravity concentration will mixed with about 1:1 by primary sludge and excess sludge and the mud obtained.
It should be noted that, the present invention is not subject to any restriction of this embodiment.
Shown in table 1 for the specification of sludge concentration device of test.In test, be mixed with the cationic polymeric flocculant (molecular-weight average 3,000,000) of 0.5% (with respect to the ratio of SS) except interpolation in slag sludge.
The proterties of the mud before and after concentration shown in table 2 and the parting liquid obtained by the concentrating and separating operation.Primary sludge is for dropping into mud.
It should be noted that, analytical procedure utilizes following method to carry out.
TS (Total solids, total evaporation residue); 105 ℃ of evaporation residue weight (JIS K0102)
VTS (Volatile total solids, loss on ignition); 600 ℃ of loss on ignitions (JIS K0102)
SS (Suspended solids, suspended particle); The weight of precipitate (JIS K0102) of utilizing centrifugal separation to obtain under rotating speed 3000rpm, the condition of 10 minutes
VSS (Volatile suspended solids, volatility suspended particle); 600 ℃ of loss on ignitions (JIS K0102) of suspended particle
M basicity; The supernatant liquor that utilizes separating centrifuge to obtain under rotating speed 3000rpm, the condition of 3 minutes is titrated to pH4.8 (sewage test method) with the hydrochloric acid soln of 0.1mol/L
Thick suspended substance; Utilize the thick suspended substance analysis (sewage test method) of specified size 74 μ m sieves
[table 1]
Table 1 sludge concentration device specification
[table 2]
Table 2 is processed the mud of front and back, the proterties of parting liquid
| ? | ? | Primary sludge | Except slag sludge | Thickened sludge | Parting liquid |
| pH | ? | 5.2 | 5.2 | 5.3 | 5.2 |
| M basicity | (mg/L?as?CaCO 3) | 480 | 470 | 960 | 480 |
| TS | (g/L) | 18.4 | 17.4 | 78.7 | - |
| VTS | (%) | 86 | 85 | 84 | - |
| SS | (g/L) | 15.0 | 14.2 | 71.8 | 364 |
| VSS | (%) | 88 | 86 | 87 | - |
| Thick suspended substance | (%, SS ratio) | 37 | 30 | 31 | - |
As can be known from the above results, can be efficiently by mud simmer down to high density by the present invention.
Then, the mud that above-mentioned thickened sludge Anaerobic Digestion is formed is carried out to dehydration test, the variation by whether adding the dehydration property that isolated screening reject causes by pre-treatment is studied.
The Anaerobic Digestion condition is as shown in table 3.The proterties of the mud before and after Anaerobic Digestion is shown in to table 4.
[table 3]
Table 3 Anaerobic Treatment condition
| The anaerobic treatment groove | (-) | Digestive shelf |
| Treatment temp | (℃) | 37 |
| HRT | (my god) | 20 |
| Drop into the raw material name | (-) | Thickened sludge |
| Drop into raw material TS concentration | (mg/L) | 78,700 |
| Drop into raw material VTS concentration | (%) | 84 |
[table 4]
Table 4 drops into the proterties of mud, Anaerobic Digestion mud
| ? | ? | Drop into mud | Digested sludge |
| pH | ? | 5.3 | 7.5 |
| M basicity | (mg/L?as?CaCO 3) | 960 | 8900 |
| TS | (g/L) | 78.7 | 38.9 |
| VTS | (%) | 84 | 68 |
| SS | (g/L) | 71.8 | 31.2 |
| VSS | (%) | 87 | 69 |
| Thick suspended substance | (%, SS ratio) | 31 | 14 |
The mud that will be in this anaerobically digested sludge with the ratio of 1:1, be mixed with following liquid is supplied in dehydration test, and described liquid is that whole amounts of whole amounts of the isolated screening reject of pre-treatment by anaerobic digestion and concentrating and separating liquid are mixed.As a comparative example, the mud that anaerobically digested sludge and concentrating and separating liquid are mixed with 1:1 is also carried out to dehydration test.Cationic polymeric flocculant (molecular-weight average 3,000,000) is used in sludge dewatering.In addition, water extracter uses (belt press) with pressure formula water extracter, in the processed condition, is that filter cloth tension force 4.9kN/m, filter cloth speed carry out under 1.0m/ minute.Its result, the water ratio of polymeric flocculant input rate and dewatered sludge is as shown in table 5.
[table 5]
The processed result of table 5 anaerobically digested sludge
| ? | ? | Embodiment | Comparative example |
| The polymeric flocculant input rate | (%, to SS) | 1.8 | 2.0 |
| The dewatered sludge water ratio | (%) | 81 | 83 |
As can be known from the above results, according to the present invention, can under few dispensing rate, obtain the dewatered sludge that water ratio is low.
description of reference numerals
1 ... the screening reject separated part, 2 ... the flocculation mixing tank, 3 ... the liquid medicine storage tank, 4 ... mud concentrates section, 5 ... the thickened sludge transferpump, 6 ... screening reject/parting liquid Receiving bin, 7 ... the anaerobic digestion groove, 8 ... drop into pump, 9 ... tempering tank, 10 ... mud extracts pump, 10a ... pipe arrangement is extracted in digested sludge, 10b ... digested sludge is returned and is used pipe arrangement, 11 ... mud, 12 ... storing unit, 13 ... equipment for separating liquid from solid, 14 ... thickened sludge, 16 ... anaerobic digestion device, 17 ... digested sludge throw out preparation facilities, 18 ... parting liquid, 19 ... the digested sludge throw out, 20 ... dewatering unit, 21 ... parting liquid, 23 ... sewage treatment equipment
Claims (14)
1. a sludge concentration method, it comprises:
The screening reject separation circuit, it is separated into mud screening reject and removes slag sludge;
Liquid mixes/flocculates operation, and it is admixing medical solutions in removing slag sludge; With
The concentrating and separating operation, it will mix/flocculate the flocculation mud solid-liquid separation generated in operation at liquid is thickened sludge and parting liquid.
2. sludge concentration method according to claim 1, wherein, this sludge concentration method comprises and can reclaim described thickened sludge and supply with operation to the thickened sludge of anaerobic digestion operation weight feed.
3. sludge concentration method according to claim 1 and 2, wherein, this sludge concentration method comprises the anaerobically digested sludge digested in described anaerobic digestion operation is mixed, again turns back to the operation of anaerobic digestion operation with described thickened sludge.
4. according to the described sludge concentration method of any one in claim 1～3, wherein, this sludge concentration method has by whole amounts of described isolated screening reject and parting liquid or a part respectively individually or be mixed into the mixed processes in the anaerobically digested sludge after the anaerobic digestion operation after mixing.
5. sludge concentration method according to claim 4, wherein, described mixed processes is by the operation of sludge dewatering or the operation before the operation by sludge dewatering.
6. according to the described sludge concentration method of any one in claim 1～4, wherein, the screening reject that described screening reject separation circuit particle separation diameter 0.5mm is above or particle diameter 2.0mm is above.
7. a sludge concentration device, it comprises:
The screening reject separated part, it is separated into mud screening reject and removes slag sludge;
Mix/flocculation of liquid section, it is admixing medical solutions in removing slag sludge; With
Concentrating and separating section, its flocculation mud solid-liquid separation generated in will mix at liquid/flocculation section is thickened sludge and parting liquid.
8. sludge concentration device according to claim 7, wherein, this sludge concentration device comprises can reclaim described thickened sludge and to the thickened sludge supply unit of anaerobic digestion device weight feed.
9. sludge concentration device according to claim 8, wherein, described thickened sludge supply unit has volume pump.
10. according to the described sludge concentration device of any one in claim 7～9, wherein, described thickened sludge supply unit is arranged on the position higher than described anaerobic digestion device.
11. according to the described sludge concentration device of any one in claim 7～10, wherein, this sludge concentration device has: for the digested sludge that ejects pipe arrangement from the anaerobically digested sludge of described anaerobic digestion device, branch out from this pipe arrangement, return with pipe arrangement and will return to the mixing section that the anaerobically digested sludge with pipe arrangement mixes with described thickened sludge from this digested sludge
The anaerobically digested sludge that described sludge concentration device will mix with thickened sludge in this mixing section turns back to described anaerobic digestion device again.
12. according to the described sludge concentration device of any one in claim 7～11, wherein, this sludge concentration device has by whole amounts of described isolated screening reject and parting liquid or a part respectively individually or be mixed into the mechanism in the anaerobically digested sludge after the anaerobic digestion operation after mixing.
13. sludge concentration device according to claim 12, wherein, described mechanism is associated with operation or the operation before the operation by sludge dewatering by sludge dewatering.
14., according to the described sludge concentration device of any one in claim 7～13, wherein, described screening reject separated part possesses: the porous plate that aperture 0.5mm is above or aperture 2.0mm is above or there is the screen cloth of 60～100 purpose wire nettings.
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| CN201811223102.4A CN109336351A (en) | 2011-04-26 | 2012-04-03 | Sludge concentration method and device |
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| JP2011-098289 | 2011-04-26 | ||
| JP2011098289 | 2011-04-26 | ||
| PCT/JP2012/059065 WO2012147467A1 (en) | 2011-04-26 | 2012-04-03 | Sludge-concentrating method and apparatus |
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| CN201811223102.4A Division CN109336351A (en) | 2011-04-26 | 2012-04-03 | Sludge concentration method and device |
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| CN201280020481.1A Pending CN103492325A (en) | 2011-04-26 | 2012-04-03 | Sludge-concentrating method and apparatus |
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| JP (2) | JP6383150B2 (en) |
| KR (1) | KR101938024B1 (en) |
| CN (2) | CN109336351A (en) |
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| CN104944715A (en) * | 2014-03-28 | 2015-09-30 | 中联环有限公司 | Method for reducing sludge and recycling sludge in UASB (upflow anaerobic sludge blanket) system and sludge treatment system |
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| JP2018167258A (en) | 2017-03-29 | 2018-11-01 | 住友重機械エンバイロメント株式会社 | Digestion facility |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61114799A (en) * | 1984-11-12 | 1986-06-02 | Ebara Infilco Co Ltd | Treatment of excretion |
| JP2000015231A (en) * | 1998-07-06 | 2000-01-18 | Kubota Corp | Method for methane fermentation of organic waste |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61254300A (en) * | 1985-05-07 | 1986-11-12 | Kurita Water Ind Ltd | Method for concentrating organic sludge |
| JPS61268400A (en) * | 1985-05-22 | 1986-11-27 | Tsukishima Kikai Co Ltd | Method for modifying sludge for dehydration |
| JPS62160183A (en) * | 1986-01-08 | 1987-07-16 | Ebara Res Co Ltd | Method for treating excretion |
| JPH03293098A (en) * | 1990-04-11 | 1991-12-24 | Nishihara Environ Sanit Res Corp | Device and method for separating and thickening system type treatment of sludge |
| JPH0698360B2 (en) * | 1990-09-20 | 1994-12-07 | 荏原インフイルコ株式会社 | Method and apparatus for treating night soil wastewater |
| JPH11300323A (en) * | 1998-04-23 | 1999-11-02 | Kubota Corp | Treatment of organic waste |
| CN101522581B (en) * | 2006-10-24 | 2012-06-13 | Mt奥科高分子株式会社 | Processes for dewatering digested sewage sludge |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61114799A (en) * | 1984-11-12 | 1986-06-02 | Ebara Infilco Co Ltd | Treatment of excretion |
| JP2000015231A (en) * | 1998-07-06 | 2000-01-18 | Kubota Corp | Method for methane fermentation of organic waste |
Non-Patent Citations (1)
| Title |
|---|
| 赖耿阳: "《污水处理机械设计》", 31 October 1990, 复汉出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944715A (en) * | 2014-03-28 | 2015-09-30 | 中联环有限公司 | Method for reducing sludge and recycling sludge in UASB (upflow anaerobic sludge blanket) system and sludge treatment system |
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| Publication number | Publication date |
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| JPWO2012147467A1 (en) | 2014-07-28 |
| JP2017100130A (en) | 2017-06-08 |
| AU2012248673A1 (en) | 2013-11-14 |
| CN109336351A (en) | 2019-02-15 |
| JP6395877B2 (en) | 2018-09-26 |
| AU2012248673B2 (en) | 2017-04-13 |
| WO2012147467A1 (en) | 2012-11-01 |
| JP6383150B2 (en) | 2018-08-29 |
| KR101938024B1 (en) | 2019-01-11 |
| KR20140036162A (en) | 2014-03-25 |
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