CN105366898B - It is a kind of that the anaerobic sludge digestion high level cadre's dewatering process for realizing adjustable high solid content is synchronously dehydrated based on dual membrane system - Google Patents
It is a kind of that the anaerobic sludge digestion high level cadre's dewatering process for realizing adjustable high solid content is synchronously dehydrated based on dual membrane system Download PDFInfo
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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
- C02F11/02—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
Abstract
The present invention provides a kind of dual membrane system and is synchronously dehydrated the anaerobic sludge digestion high level cadre's dewatering process for realizing adjustable high solid content.New technology includes anaerobic sludge digestion reaction member, positive infiltration solid content adjustment unit, membrane distillation and draws sludge high-drying dewatering unit after liquid upgrading unit and digestion.This technology utilization is just permeating solid content adjustment unit and it is being dehydrated while anaerobic sludge digestion, realize that solid content is adjustable in sludge digestion course of reaction, enhance anaerobic sludge digestion course of reaction, it is low to efficiently solve the high solid content of moisture percentage in sewage sludge, the problems such as the big digestive efficiency of digestion reactor volume is low, anaerobic digestion efficiency is improved while sludge volume is reduced.Simultaneously using positive infiltration high level cadre's dewatering process, the super low energy consumption minimizing of final sludge can be achieved.All positive infiltrations draw liquid and draw the utilization of liquid upgrading unit concentration cycles by membrane distillation, and take full advantage of the temperature of anaerobic digestion solution in the process.
Description
Technical field
The invention belongs to technical field of sludge treatment.
Background technology
In recent years, with the increase of sewage load, the yield of excess sludge is growing day by day, therefore, for excess sludge
Processing disposal with resource reclaim turn into research focus.
Anaerobic sludge digestion technique can realize the stabilisation of excess sludge, and the energy can be reclaimed in the form of combustible gas, therefore
It can be played a significant role in municipal sludge processing disposal.However, causing conventional anaerobic sludge digestion technique to build up, rate is low, runs
The reason for rate is lower mainly includes two aspects：First, feed sludge moisture content is high, second, the factor of created gase of anaerobic digestion is low, cause to detest
Oxygen digestion facility volume is big, and overall investment is big, and high energy consumption needed for huge system heating and thermal insulation, the energy regenerating of anaerobic digestion
Advantage unobvious, process economy be not high.Sludge biogas production rate is influenceed by many factors, and one of them important factor is
The total solids content (i.e. solid content) of feed sludge.Therefore, the solid content of feed sludge is integrally invested with anaerobic digestion process
And the important parameter that performance driving economy is relevant.Sludge solid content is improved, required reactor volume will be greatly decreased, and remain anti-
The energy consumption needed for temperature is answered also accordingly to reduce, so as to save investment in fixed assets and operating cost etc..
But the high solid content of sludge may produce some detrimental effects in pretreatment stage, meanwhile, high solid content is dirty
Mud also brings along some problems in anaerobic digestion initial reaction stage：(1) response matrix concentration is high, causes reaction intermediate and energy
Transmit in media as well, spread difficulty, easily form feedback inhibition；(2) moisture is low, influences signaling or enzyme diffusion, increase
Start difficulty；(3) it is big to stir resistance, high energy consumption.The first two problem can cause the reaction time to extend, so as to which partial offset sludge is high
The advantage of reactor volume reduction caused by solid content.In addition, agitating unit is that influence factor of created gase is non-in anaerobic digestion process
A Chang Guanjian part, while be also the most step of power consumption, its power consumption accounts for whole biogas engineering operation power consumption 50% or so, stirred
Mix energy consumption it is soaring may also the high solid content anaerobic sludge digestion of partial offset process economicses sexual clorminance.Buildings in Beijing engineering science
Institute's Cao Xiu qins etc. are proved using the result of study of pilot scale, even solid content is increased to 10% from 8%, to reach identical mixing
Effect, stirring intensity are also required to significantly increase.
Patent NO.201010504997.6 proposes a kind of high concentration sludge anaerobism that mechanical dewatering is carried out to sludge and disappeared
Change handling process, reduce the volume of anaerobic sludge digestion reactor, improve the organic loading of sludge, but in anaerobic reaction
Sludge solid content at initial stage be up to more than 10%, the startup for anaerobic reaction is unfavorable, while the rise of solid content also makes
Power consumption must be stirred to greatly increase.
Start with reaction and compared with the initial charge stage, with the progress that high solid content anaerobic sludge digestion reacts, sludge
Rheological property can improve, viscosity can reduce so that stirring energy consumption, mass transfer, energy transmission the problems such as improved.Cause
This, high solid content sludge may not cause operation difficult in the middle and later periods that anaerobic digestion is reacted or stirring energy consumption rise.Thus
It can be seen that how anaerobic digestion reaction vessel start and running in realize solid content Reasonable Regulation And Control (i.e. in initial reaction stage or
Charging stage control solid content is relatively low, and to reach good stirring/mass-transfer performance, and later stage or reactor end are dirty in the reaction
Solid content is improved when mud rheological property is preferable to realize high volumetric loading and good process economy), it is to overcome above-mentioned a variety of ask
The key of topic.
Regulating and controlling solid content can be by the way that hydraulic detention time (HRT) be separated to realize with solid retention time (SRT).For
For anaerobic digestion reaction, HRT and SRT points are opened, the advantage of organic removal rate lifting etc. can be brought.Traditional sludge
Anaerobic digestion is usually to be carried out in complete (CSTR), can not realize separating for HRT and SRT.Patent
NO.201010623418.X discloses a kind of biomass high solid anaerobic digestion process for separating simultaneously returnedactivatedsludge, uses
The mode being then refluxed for anaerobic digester system discharging sludge centrifugation realizes HRT and SRT separation, but centrifuges consumed energy
It is larger, and the mode to flow back entering for the larger anaerobic digestion reaction for being unfavorable for stabilization of Organic loading shock of digestive system
OK.
Meabe etc. can make HRT and SRT points of anaerobic digestion process to open using the anaerobic membrane bioreactor of milipore filter,
But result of the test is shown, this kind of reactor can not realize high solid content anaerobic sludge digestion truly.It is dirty in charging
In the case of mud solid content 2%, after 2 months stable, sludge solid content only maintains 7% in high temperature and medium temperature reactor
Left and right.Sludge solid content raises again may result in pressure-actuated milipore filter fouling membrane and further deteriorates.Use milipore filter
The flux of film-anaerobic sludge digestion process stabilizing operation is low, and energy consumption is big, operating cost phase caused by membrane material cleaning or replacing
That answers is higher.
Anaerobic digestion solution can be the main reason for causing ultrafiltration membrane process to fail to the high pollution of perforated membrane.With this phase
Right, Holloway etc. is carried out dense using positive infiltration (Forward osmosis, FO) technique to the dehydration liquid of sludge after anaerobic digestion
During contracting, the pollution situation of forward osmosis membrane (dense film, non-pressure driving) wants gently more, and is reversible membrane fouling substantially.
Positive infiltration refers under the driving selectively through film both sides permeable pressure head, and water is higher from the relatively low side flow direction of osmotic pressure
The natural phenomena of side.FO techniques are by FO film units and draw liquid regeneration unit and form.In FO film units, have drawing for hyperosmosis
Liquid is taken to form permeable pressure head in permeable membrane both sides with pending solution, water enters after diffusing through permeable membrane from pending solution to be drawn
Liquid.The liquid that draws after dilution is transported to upgrading unit again, draws liquid herein and is separated from water, and the liquid that draws after concentration follows again
It is looped back to FO units.Although the concentration for having FO to be applied to industrial wastewater before nearly 40 years, is limited to forward osmosis membrane material
Performance and the problems such as draw the efficiency profit energy consumption of liquid regeneration, be just increasingly becoming desalination, sewage disposal after 2005
Etc. study hotspot.Cut-off 2015, with the progress of membrane material, researcher has carried out FO techniques in multiple fields
The feasibility study of application.
Membrane distillation (Membrane distillation, MD) is one kind in current emerging membrane separation technique, is using thin
Process of the steam pressure difference of water-based microporous barrier both sides as a kind of UF membrane of mass transfer force.Its principle is, when temperature is higher
Raw water solution when flowing through one side of microporous hydrophobic membrane because film has a hydrophobic performance, raw water solution can not by fenestra,
But because the water vapor pressure ratio another side on the raw water solution on the high hot-fluid side of temperature and the interface of film is high, water vapour can be with
By fenestra from enter it is other while, and then can be condensed by cold-side fluid, this completes to the dense of raw water
Contracting has also obtained pure simultaneously.
The content of the invention
The present invention is intended to provide a kind of, based on dual membrane system, synchronously dehydration realizes that the sludge anaerobic of adjustable high solid content disappears
The device and method of change-high level cadre's dewatering process, dual membrane system of the invention mainly include positive infiltration solid content adjustment unit and film
Liquid upgrading unit is drawn in distillation.Excess sludge after concentration enters positive infiltration anaerobic digestion reaction vessel after pretreatment, is reacting
During partial moisture is removed out of reaction system by FO-MD combination techniques, under the digested sludge after thickening enters
Sludge high-drying dewatering unit after the digestion of one step, the liquid that draws being diluted are drawn after liquid upgrading unit is concentrated again in membrane distillation
Sludge high-drying dewatering unit after being transported to positive infiltration solid content adjustment unit or digesting.
The device of the present invention is the sludge aerobic digestion device of positive infiltration coupling membrane distillation, mainly including anaerobic sludge digestion
Reaction member, positive infiltration solid content adjustment unit, membrane distillation draw sludge high-drying dewatering unit after liquid upgrading unit and digestion.It is dirty
Mud anaerobic digestion reaction member forms positive infiltration anaerobic digestion reaction vessel with positive infiltration solid content adjustment unit by forward osmosis membrane.
The former is connected with sludge high-drying dewatering unit after digestion by valve with pipeline.It is dirty after positive infiltration solid content adjustment unit, digestion
Mud high level cadre dewatering unit draws liquid upgrading unit with membrane distillation and is connected by valve with pipeline.Whole system contains such as lower component：
Raw sewage pond 1：For storing excess sludge and carrying out pre-concentration to it；
Positive infiltration anaerobic digestion reaction vessel 2：For sludge anaerobic reaction and be synchronously dehydrated；
Membrane component 3：The concentration of liquid is drawn for aligning infiltration；
Membrane distillation driving liquid constant temperature circulating groove 4：For caused clear water in storage films still-process；
High level cadre is dehydrated positive permeable reactive device 5：For being further dehydrated to the sludge after anaerobic digestion；
Raw sewage pump 6：For raw sewage to be pumped into the sludge-tank of positive infiltration sludge anaerobic reactor 2；
Liquid circulating pump 7 is drawn in positive infiltration：For entering membrane component and being concentrated the liquid pump that draws being diluted；
Membrane distillation driving liquid circulating pump 8：For the driving liquid pump of membrane distillation to be entered into clear water reserviors；
Liquid circulating pump 9 is drawn in high level cadre's dehydration：For entering membrane component and being concentrated the liquid pump that draws being diluted；
Gas collector 10：For collecting gas caused by anaerobic digestion reaction.
It is a kind of sludge anaerobic for being synchronously dehydrated using dual membrane system and realizing adjustable high solid content that the method for the present invention, which is,
The method of digestion-high level cadre's dehydration, key step and operation principle are：
(1) excess sludge 10 of sewage treatment plant be discharged into raw sewage pond 1 carry out pre-concentration reach certain solid content
Afterwards, then by raw sewage pump 6 sludge-tank for being pumped into positive infiltration anaerobic reactor carries out anaerobic digestion.In the process, by just
Infiltration membrane process will discharge system outside moisture, so as to reach the purpose for improving solid content.One is carried out during anaerobic sludge digestion
Determine the stirring of intensity, the effect of stirring mainly makes functional microorganism and matrix have sufficient touch opportunity, and makes whole system
Interior solid content is uniform, beneficial to maintain forward osmosis membrane membrane flux in a relatively high level.
(2) excess sludge Jing Guo anaerobic digestion enters the positive permeable reactive device 5 of high level cadre's dehydration by pipeline, Valved discharge
Sludge-tank, direct thickening is further completed by forward osmosis membrane technique in this unit, moisture percentage in sewage sludge reaches less than 60%,
Final disposal can be carried out after the discharge of high level cadre's dewatered sludge；
(3) liquid concentration in just infiltration solid content adjustment unit of drawing just in infiltration anaerobic digestion reaction vessel 1 is diluted,
By just permeating the hot side for drawing liquid circulating pump 7 and being pumped into membrane distillation and drawing liquid upgrading unit after the outflow of this unit, in this unit
Inside draw driving of the liquid due to temperature difference, moisture evaporation becomes gas and passes through that to enter cold side after the micropore transmission of porous hydrophobic membrane cold
Become aqueous water again after solidifying.In this process, draw liquid to have obtained concentrating again, concentration rise, then acted in hydraulic pressure
Under be circulated back to positive infiltration anaerobic digestion reaction vessel 1 draw liquid pool recycling；
(4) membrane distillation draw cold side in membrane component 3 in liquid upgrading unit clear water pass through membrane distillation drive liquid circulate
Pump 8 is pumped into membrane distillation driving liquid constant temperature circulating groove 4, partly as reuse Water circulation, is partially recycled to membrane component cold side.
(5) liquid concentration in the positive permeation unit of high level cadre's dehydration of drawing that high level cadre is dehydrated in positive permeable reactive device 5 is diluted, from
The hot side that liquid circulating pump 9 is pumped into membrane component 3 is drawn by high level cadre's dehydration after the outflow of this unit, drawn in this unit liquid by
In the driving of temperature difference, moisture evaporation becomes gas by becoming again after entering cold side condensation after the transmission of the micropore of porous hydrophobic membrane
Into aqueous water.In this process, draw liquid to have obtained concentrating again, concentration rise, be then circulated back under hydraulic pressure effect
The liquid pool that draws that high level cadre is dehydrated positive permeable reactive device 5 reuses.
The beneficial effects of the invention are as follows：
(1) moisture content of feed sludge is higher, and solid content is relatively low, and reacting anaerobic digestion startup speed does not influence,
Reaction intermediate and energy will not be caused to form feedback inhibition because transmitting, spreading difficulty；
(2) as reaction is carried out, the solid content of feed liquid rises in reactor, so as to greatly improve volumetric loading and volume production
Gas rate：
(3) in system excessive moisture removing, reduce follow-up heat input demand, improve process economy；
(4) compared with the low solid content anaerobic sludge digestion process of tradition, reinforcement process has no significant effect to stirring energy consumption；
(5) FO fouling membranes are light, and essentially reversible membrane fouling, process runs well；
(6) FO techniques draw the heat for being concentrated by membrane distillation realization, can making full use of anaerobic digestion solution of liquid, without extra
Energy consumption；
(7) compared with dehydration filtrate is back to sewage treatment unit in conventional anaerobic digestion-dewatering process, technique digestion
Liquid water outlet after processing can direct reuse, to the zero load increase of sewage treatment unit；
(8) apparatus structure of this technique is compact, and floor space is small, and operational management is convenient, simple to operate.
Brief description of the drawings
Accompanying drawing 1 is the process chart of device in the present invention.
In figure：1；Raw sewage pond；2：Positive infiltration anaerobic digestion reaction vessel；3：Membrane component；4：Membrane distillation driving liquid is permanent
Warm circulating slot；5：High level cadre is dehydrated positive permeable reactive device；6：Raw sewage pump；7：Liquid circulating pump is drawn in positive infiltration；8：Membrane distillation drives
Liquid circulating pump；9：Liquid circulating pump is drawn in high level cadre's dehydration；10：Gas collector；11：Valve one；12：Valve two；13：Valve
Three；14：Valve four
Embodiment
Specific embodiments of the present invention is described in detail with reference to the accompanying drawings.
As shown in figure 1, a kind of be synchronously dehydrated the anaerobic sludge digestion-height for realizing adjustable high solid content based on dual membrane system
Dry dewatering process device includes raw sewage pond 1：For storing excess sludge and carrying out pre-concentration to it；Positive infiltration anaerobic digestion is anti-
Answer device 2：For sludge anaerobic reaction and be synchronously dehydrated；Membrane component 3：The concentration of liquid is drawn for aligning infiltration；Film steams
Evaporate driving liquid constant temperature circulating groove 4：For caused clear water in storage films still-process；High level cadre is dehydrated positive permeable reactive device 5：For
Sludge after anaerobic digestion is further dehydrated；Raw sewage pump 6：For raw sewage to be pumped into positive infiltration sludge anaerobic reaction
The sludge-tank of device 2；Liquid circulating pump 7 is drawn in positive infiltration：For entering membrane component and being concentrated the liquid pump that draws being diluted；
Membrane distillation driving liquid circulating pump 8：For the driving liquid pump of membrane distillation to be entered into clear water reserviors；Liquid circulating pump 9 is drawn in high level cadre's dehydration：For
The liquid pump that draws being diluted is entered membrane component and concentrated；Gas collector 10：For collecting anaerobic digestion reaction production
Raw gas.
The excess sludge of sewage treatment plant directly delivers into raw sewage pond 1 by pipeline.Pass through weight in raw sewage pond 1
Power effect carries out preliminary concentration and causes moisture content to be reduced to 97%~98%, is then pumped into by raw sewage into positive infiltration
Anaerobic digestion reaction vessel 2, a mud is entered using intermittent feeding every 24 hours.Positive infiltration anaerobic digestion reaction vessel passes through heating wire
Being heated, and simultaneously using the thermometer measure temperature being put into positive infiltration sludge anaerobic reactor, temperature-control range is 30~
55℃；Intermittent stirring is carried out using mixer, stirring intensity makes corresponding adjustment according to the change of sludge solid content；Determine simultaneously
The pH of sludge, debugging is carried out to the acid-base value of sludge according to measurement result so that anaerobic reaction is smoothed out.
Positive infiltration anaerobic digestion reaction vessel sludge-tank is shaped as cuboid, simultaneously by forward osmosis membrane with drawing liquid side phase
Even.In the specific implementation, the form of just infiltration anaerobic digestion membrane module includes board-like, rolling, hollow fiber form or tubular type, described
Forward osmosis membrane component run simultaneously to be one or more groups of, the forward osmosis membrane material of described positive infiltration anaerobic digestion reaction vessel
Separating layer and support layer material are organic polymer, its separating layer include but is not limited to cellulose acetate, Triafol T,
Polyamide and add the permeable membrane material that other micro substances are formed using these materials by skeleton, its supporting layer include but
It is not limited to polysulfones, polyether sulfone etc.；The conductivity range that liquid is drawn as positive infiltration exists for 150,000~250,000 μm/cm
Draw and gradually deviate from moisture from sludge in the presence of liquid osmotic pressure and cause the moisture content scope of anaerobically digested sludge is stable to exist
92%~96%.
Gas caused by anaerobic reaction is carried out by the gas collector 10 being connected with positive infiltration anaerobic digestion reaction vessel 2
Collect, and be equipped with flow monitoring part and gas yield is detected.The sludge in anaerobic digestion reaction vessel is determined simultaneously
Phase sampling observation moisture content changes correspondingly to adjust the concentration for drawing liquid and daily inputiing mud volume, mud of every 60 days rows.Just
The mud discharging mouth for permeating sludge anaerobic reactor 2 is dehydrated just by the high level cadre of pipeline and valve and sludge high-drying dewatering unit after digestion
The charging aperture of permeable reactive device 5 is connected.Sludge is delivered into high level cadre by Action of Gravity Field to be dehydrated in positive permeable reactive device 5.
The positive permeable reactive device of high level cadre's dehydration is shaped as cuboid, is simultaneously connected by forward osmosis membrane with drawing liquid side.
When it is implemented, the form of just infiltration high level cadre dehydration membrane module includes board-like, rolling, hollow fiber form or tubular type；Described height
The separating layer and support layer material of the forward osmosis membrane material of the dry positive permeable reactive device 5 of dehydration are organic polymer, its separating layer
Including but not limited to cellulose acetate, Triafol T, polyamide and add other trace contents by skeleton of these materials
The permeable membrane material that matter is formed, its supporting layer include but is not limited to polysulfones, polyether sulfone etc.；It is described as positive infiltration to draw liquid
Conductivity range is 200,000~300,000 μm/cm.Moisture is gradually removed from sludge in the presence of liquid osmotic pressure is drawn,
So that the moisture content of final sludge is reduced to less than 60%.Final high dewatered sludge takes intermittent discharge to carry out final disposal.
Liquid is drawn in the He of reactor 2 from what positive infiltration anaerobic digestion reaction vessel 2 and the positive permeable reactive device 5 of high level cadre's dehydration flowed out
Diluted in 5.When the concentration for drawing liquid draws the 1/2~1/5 of liquid electrical conductivity for original, membrane component 3 is returned it into
Hot side concentrated.The outlet for drawing liquid pool that positive infiltration anaerobic digestion reaction vessel 2 and high level cadre are dehydrated positive permeable reactive device 5 leads to
The hot side import that pump, valve and pipeline are crossed with membrane component 3 is connected.The hot side of membrane component 3 by membrane distillation film with it is cold
Side is connected.In the specific implementation, the membrane material of described membrane component is organic polymer, including but not limited to polytetrafluoro
Ethene, Kynoar, polyethylene etc., the form of film distillation film component include board-like, rolling, hollow fiber form or tubular type；Institute
The membrane component stated is one or more groups of while run that membrane distillation hot side is heated by water-bath, and passes through thermometer
Measurement temperature, heating temperature range are 50~75 DEG C, and the temperature range of cold side can ensure that higher film leads between 5~20 DEG C
Amount.The control of cold-side temperature takes natural cooling or refrigeration machine to control according to environment temperature.Clear water passes through caused by membrane distillation
Membrane distillation driving liquid circulating pump 8 is pumped into membrane distillation driving liquid constant temperature circulating groove 4, and wherein clear water part is back to caused by membrane distillation
Landscape water.
Claims (9)
1. a kind of be synchronously dehydrated the anaerobic sludge digestion-high level cadre's dewatering process for realizing adjustable high solid content based on dual membrane system,
Comprise the following steps：
The first step, raw sewage is pumped into by raw sewage to disappear into positive infiltration anaerobic sludge digestion reactor sludge-tank progress anaerobism
Change and be synchronously dehydrated；
Second step, positive infiltration are drawn liquid and concentrated by just permeating to draw liquid pump and deliver into membrane component hot side；
3rd step, the liquid that draws after the completion of concentration deliver into positive infiltration anaerobic sludge digestion reactor by circulating pump and just permeated
Membrane module draws liquid side；
4th step, membrane distillation drive liquid to flow out through membrane distillation driving liquid circulating pump from the cold side of membrane component and enter film steaming
Evaporate the groove cooling of driving liquid constant temperature circulating；
5th step, the membrane distillation driving liquid after temperature reduces are circulated back to membrane component cold side and continue to align infiltration and draws
The concentration of liquid；
6th step, the positive sludge for permeating anaerobic sludge digestion reactor sludge-tank deliver into sludge high-drying after digestion reaction
Positive permeable reactive device is dehydrated to continue to concentrate；
7th step, the liquid that draws that sludge high-drying is dehydrated positive permeable reactive device draw liquid circulating pump by high level cadre's dehydration and deliver into film
Distillation component hot side is concentrated；
8th step, concentrate completion draw that liquid is circulated back to that sludge high-drying is dehydrated positive permeable reactive device draw liquid side；
9th step, sludge high-drying are dehydrated high dewatered sludge discharge caused by positive permeable reactive device and carry out final disposal.
2. anaerobic sludge digestion according to claim 1-high level cadre's dewatering process, it is characterised in that just permeated in the first step
The heating temperature range of anaerobic sludge digestion reactor sludge-tank is 30 ~ 55 DEG C.
3. anaerobic sludge digestion according to claim 1-high level cadre's dewatering process, it is characterised in that membrane distillation in second step
The hot side heating temperature range of component is 50 ~ 75 DEG C.
4. anaerobic sludge digestion according to claim 1-high level cadre's dewatering process, it is characterised in that drawing in second step
Liquid type include ionizable solion, organic molecule solution, nanometer particle colloid liquid, desalination process concentrated water or it is other can
Produce the solution of stronger osmotic pressure.
5. anaerobic sludge digestion according to claim 1-high level cadre's dewatering process, it is characterised in that the sludge in the 6th step
High level cadre is dehydrated positive permeable reactive device and the sludge after anaerobic digestion is continued into dehydration concentration, and final moisture content reaches less than 60%.
6. a kind of be synchronously dehydrated the anaerobic sludge digestion-high level cadre's dehydration device for realizing adjustable high solid content based on dual membrane system,
Liquid upgrading unit and sludge high-drying are drawn including anaerobic sludge digestion reaction member, positive infiltration solid content adjustment unit, membrane distillation
Positive permeable reactive device is dehydrated, is described in detail below：
The anaerobic sludge digestion reaction member includes：Raw sewage pond, raw sewage pump, positive infiltration anaerobic digestion reaction vessel sludge-tank
With stirring/temperature-controlled member；The charging aperture in raw sewage pond, raw sewage pump and positive infiltration anaerobic digestion reaction vessel sludge-tank passes through pipeline
It is connected with valve；
The positive infiltration solid content adjustment unit includes：Positive infiltration anaerobic digestion reaction vessel draws liquid pool, forward osmosis membrane component, just
Liquid circulating pump and flow monitoring control unit are drawn in infiltration；Positive infiltration anaerobic digestion reaction vessel draws liquid pool outlet, positive infiltration
Liquid circulating pump is drawn with membrane distillation hot side import by pipeline with valve to be connected；
The membrane distillation, which draws liquid upgrading unit, to be included：Membrane component, membrane distillation driving liquid circulating pump, membrane distillation driving liquid are permanent
Warm circulating slot and temperature and flow monitoring control assembly；Membrane component hot side outlet is drawn with positive infiltration anaerobic digestion reaction vessel
Liquid pool import is taken to be connected by valve with pipeline；Membrane component cold side outlet port and membrane distillation driving liquid constant temperature circulating groove pass through pipe
Road is connected with valve；
The sludge high-drying, which is dehydrated positive permeable reactive device, to be included：High level cadre is dehydrated positive permeable reactive device and liquid circulation is drawn in high level cadre's dehydration
Pump group part；The charging aperture that the outlet of positive infiltration anaerobic digestion reaction vessel sludge-tank is dehydrated positive permeable reactive device with high level cadre passes through pipeline
It is connected with valve, the positive permeable reactive device of high level cadre's dehydration draws the outlet of liquid pool and membrane distillation hot side import passes through valve and pipeline phase
Even；
Positive infiltration is drawn liquid circulating pump and is connected with membrane component hot side import by valve with pipeline.
7. a kind of according to claim 6, based on dual membrane system, synchronously dehydration realizes that the sludge anaerobic of adjustable high solid content disappears
Change-high level cadre's dehydration device, it is characterised in that the forward osmosis membrane of described positive infiltration anaerobic digestion reaction vessel, separating layer and support
Layer material is organic polymer, and its separating layer includes cellulose acetate, Triafol T, polyamide or respectively with these things
Matter is added the permeable membrane material that other micro substances are formed by skeleton, and its supporting layer includes polysulfones or polyether sulfone.
8. a kind of according to claim 6, based on dual membrane system, synchronously dehydration realizes that the sludge anaerobic of adjustable high solid content disappears
Change-high level cadre's dehydration device, it is characterised in that the membrane material of described membrane component is organic polymer, including polytetrafluoroethyl-ne
Alkene, Kynoar or polyethylene.
9. a kind of according to claim 6, based on dual membrane system, synchronously dehydration realizes that the sludge anaerobic of adjustable high solid content disappears
Change-high level cadre's dehydration device, it is characterised in that the form of forward osmosis membrane component and film distillation film component includes board-like, rolling, hollow
Fiber type or tubular type.
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| GB201605070D0 (en) * | 2016-03-24 | 2016-05-11 | Applied Biomimetic As | Power generation process |
| CN106915886A (en) * | 2017-03-24 | 2017-07-04 | 中国市政工程中南设计研究总院有限公司 | A kind of new sludge treatment equipment and method |
| CN112456718A (en) * | 2020-12-16 | 2021-03-09 | 北京城市排水集团有限责任公司 | Device and method for treating anaerobic digestion liquid of pyrohydrolysis sludge |
| CN114460264A (en) * | 2021-07-26 | 2022-05-10 | 北京建筑大学 | Evaluation method for sludge dewatering performance |
| CN114368892A (en) * | 2021-12-29 | 2022-04-19 | 图方便（苏州）环保科技有限公司 | Sludge treatment device with dehydration function and application thereof |
| CN114368887A (en) * | 2021-12-29 | 2022-04-19 | 图方便（苏州）环保科技有限公司 | Sludge treatment device capable of promoting microbial fermentation and application thereof |
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