CN106630131B - A kind of preparation method of modified attapulgite soil particle and the method for accelerating anaerobic granulation using it - Google Patents
A kind of preparation method of modified attapulgite soil particle and the method for accelerating anaerobic granulation using it Download PDFInfo
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- CN106630131B CN106630131B CN201610935478.2A CN201610935478A CN106630131B CN 106630131 B CN106630131 B CN 106630131B CN 201610935478 A CN201610935478 A CN 201610935478A CN 106630131 B CN106630131 B CN 106630131B
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The method for accelerating anaerobic granulation the invention discloses a kind of preparation method of modified attapulgite soil particle and using it, belongs to water-treatment technology field.The present invention be UASB reactor bottom formed formed by anaerobic grain sludge and attapulgite modified particle it is anaerobic mud bed, attapulgite is granulated through polyquaternium -7 is modified with sodium alginate, then it is added in anaerobic sludge, modified attapulgite soil particle accounts for the 2%~5% of UASB reactor effective volume；Waste water passes through reactor by reactor bottom from bottom to top, and the gas of upward water flow and generation rises in reactor, generates preferable mixing effect, and Sludge Bed reaction zone top is made to form suspended sludge layer.The present invention can enhance the activity and flocculability of sludge, improve activated sludge Extracellular polymers content by the way that modified attapulgite soil particle is added in activated sludge; shorten granular sludge process; to improve reactor removal efficiency, and cost is relatively low by the present invention, and stability is good.
Description
Technical field
The present invention relates to water-treatment technology fields, more specifically to a kind of preparation side of modified attapulgite soil particle
Method and the method for accelerating anaerobic granulation using it.
Background technique
UASB reactor, i.e. upflow anaerobic sludge blanket reactor are a kind of equipment anaerobic bio-treatment of wastewater, are called liter
Flow anaerobic sludge bed reactor is to be taught to developed in 1977 by the Lettinga of Holland.Sewage leads to from bottom to top
Anaerobic mud bed reactor is crossed, reactor bottom is the sludge blanket of high concentration, high activity, and most of organic matters are converted into herein
CH4、CO2.The water flow of rising and the nitrification gas generated make to form relatively lean suspended sludge layer above sludge blanket.UASB is anti-
It answers and is provided with three phase separator above device, gas is collected into the collection chamber of three phase separator, and the granule sludge after degassing is heavy
It forms sediment to the sludge blanket of reaction zone, clear water, which is collected through top captation from effluent weir, to flow out.UASB reactor have equipment it is simple,
Operation is convenient, no setting is required sedimentation basin and sludge reflux is not necessarily to the advantages that packing material.But when the starting of existing UASB reactor
Between it is longer, be affected by the performance of granule sludge, thus efficiently starting UASB reactor key be that culture settleability
The good anaerobic grain sludge of energy, shortens the process of granular sludge.
Currently, a large amount of domestic and international researchers all are being dedicated to accelerating the research of granular sludge technology, and achieve certain
Effect, current widely used method mainly has addition inorganic metal salt, high-speed mixing method, add organic polymer and
Add inert carrier particle object.Wherein, inorganic metal salt is added, it can using the effects of its charge neutrality Electrostatic Absorption and adsorption bridging
To play the role of the aggregation and bonding of adult at the beginning of promoting granule sludge, but some heavy metal ion can be to anaerobic grain sludge
Methanogenesis activity generates stronger inhibiting effect, to influence granulating process, and most metal ions are easily and in anaerobic system
CO3 2-In conjunction with sediment is formed, removing of degrading is difficult in inside reactor fouling.High-speed mixing method can increase muddy water contact
Area has efficiently ensured the supply of sludge nutriment, but it must use the anaerobic sludge of high activity and operating procedure is cumbersome,
Energy consumption is higher.Adding high polymer used in organic polymer is usually cationic, and such compound microorganism multipair greatly has one
Determine toxicity, and inhibit the activity of anaerobe, though therefore its addition have certain promotion to the pelletising process of sludge,
Effect is little, it is difficult to meet requirement, especially in culture middle and later periods, inhibition of these organic polymers to anaerobe
Property starts to play a leading role.Inert carrier particle object, such as powdery zeolite, xonotlite fibrous particle etc. are added, it is micro- anaerobism can be accelerated
Biology accelerates granular sludge in the richness product on its surface, but because addition inert material is not biodegradable, just reduces over time
The dischargeable capacity of reactor, and add excessive particle and can hinder the aggregation and bonding of the first adult of sludge, for granule sludge
Growth do harm rather than good.
Therefore, it develops a kind of new and preferable granular sludge accelerated method of effect and always is that domestic and international researcher is thought
The technical problem to be solved.It is existing related open about the patent report for shortening granular sludge process through retrieving.Such as middle promulgated by the State Council
Bright patent CN 201310169107.4 discloses a kind of method for accelerating anaerobic granulation, and this application is mixed to sludge
It closes in liquid system and adds granular activated carbon and polyquaternium simultaneously, to a certain extent can using granular activated carbon and high polymer
The granulating speed for effectively accelerating sludge, enhances granular sludge effect, but the cost is relatively high for active carbon, so as to cause it
Engineering application is restricted.
Attapulgite (rich magnesium silicate clay mineral) is China's abundance and a kind of low-cost clay mineral, interior
Portion's multi-pore channel, cavity, large specific surface area can increase the contact area of microorganism Yu inertia core, accelerate microorganism in its table
The aggregation in face.Therefore, attapulgite is used for the culture of granule sludge by existing research person, to shorten granular sludge
Time accelerates granular sludge process, and e.g., Chinese invention patent CN 201410074518.X discloses a kind of recessed using modification
The method that convex stick earth culture supports aerobic nitrifying granular activated sludge, this method are to be modified place using sulfuric acid after crushing concave convex rod original soil
Reason, the modified attapulgite for then screening appropriate particle size range carries out calcination process, and the modified attapulgite after roasting is used for
The culture of oxygen nitrifying activated sludge.Although the modified attapulgite using this application cultivates to a certain degree activated sludge
On can shorten time of granular sludge, COD removal rate is also relatively high, but concave convex rod easily occurs point in this application
Dissipate, stability it is relatively poor, to influence the effect of granular sludge.
Summary of the invention
1. technical problems to be solved by the inivention
It is living it is an object of the invention to overcome the granulating process of anaerobic sludge used in existing UASB reactor relatively slow
The performance of property sludge needs to be further increased, and the starting so as to cause UASB reactor is slower, is difficult to the treatment effect of sewage
The deficiency met the requirements provides a kind of preparation method of modified attapulgite soil particle and accelerates anaerobic granulation using its
Method.The present invention in activated sludge by adding modified attapulgite soil particle, so as to strengthen, promote the wadding of microorganism
Solidifying effect, accelerates granular sludge process, and improve the content of activated sludge Extracellular polymers, and then improves the removal of reactor
Efficiency guarantees wastewater treatment efficiency.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of preparation method of modified attapulgite soil particle of the invention, this method carry out acid activation to attapulgite first
Processing, be then modified processing obtain it is attapulgite modified, of the invention change is obtained to attapulgite modified be granulated
Property attapulgite particle, the specific steps of which are as follows:
(1) acid activation: hydrochloric acid solution being added into attapulgite original soil, vibrate at room temperature, staticly settle after filter, so
After adopt that be washed with deionized to pH value be 7, and dried in 100 DEG C~120 DEG C baking ovens, obtain sour work after ground, sieving
Change attapulgite；
(2) modification: being modifying agent with polyquaternium -7, organically-modified to the progress of acid activation attapulgite, is changed
Property attapulgite；
(3) it is granulated: the attapulgite after modification being granulated through automatic pill-making machine by a certain percentage with sodium alginate, i.e.,
Modified attapulgite soil particle is obtained, is sealed.
Further, use molar concentration for the hydrochloric acid solution pair of 0.5mol/L~2.5mol/L in the step (1)
Attapulgite original soil carries out acid activation processing, and the mass ratio of attapulgite original soil and hydrochloric acid solution is 1:20~1:10.
Further, 5~10 parts of acid activation attapulgite, are gone by 1~3 part of polyquaternium -7 in the step (2)
50~60 parts of ionized water and 50~60 parts of ethyl alcohol, which are placed at 80 DEG C, is stirred to react 60min~100min, thus to attapulgite into
Row modification.
Further, the concentration of ethyl alcohol used is 90%~95% in the step (2).
Further, the attapulgite modified mixed proportion with sodium alginate is 10:1~15:1 in the step (3),
And deionized water is added and carries out granulation processing.
Further, the partial size of gained modified attapulgite soil particle is 2mm~4mm in the step (3).
A kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the invention, the steps include:
Step 1: the preparation of modified attapulgite soil particle: being changed using method of any of claims 1-6 preparation
Property attapulgite particle；
Step 2: the sludge bed that UASB reactor is added in modified attapulgite soil particle is formed granule sludge, modification is recessed
The additive amount of convex stick soil particle accounts for the 2%~5% of reactor effective volume, and controls the water flow upflow velocity in reactor and be
0.6m/h~0.8m/h, water temperature are maintained at 35 DEG C~38 DEG C.
Further, the bottom of the UASB reactor is equipped with water-distributing device, which is installed on sludge bed
Internal and be connected with water inlet pipe, the top of sludge bed is suspended sludge layer；The top of the reactor is equipped with three phase separator,
Three phase separator top is equipped with collection chamber, which is connected with biogas escape pipe；It is additionally provided with and catchments above the reactor
Device and effluent weir.
Further, the concentration for controlling UASB reactor endoparticle sludge is 60g/L~100g/L, and suspended sludge layer is dense
Degree is 10g/L~50g/L, and water inlet concentration of suspension is lower than 200mg/L, and water inlet pH value is 6.8~7.5.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result:
(1) a kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the invention, uses price
Attapulgite cheap, from a wealth of sources can significantly reduce operating cost, after attapulgite acid activation, utilize polyquaternium-
7 pairs its carry out it is organically-modified, will above-mentioned attapulgite modified granulation addition and by sodium alginate to attapulgite modified granulation
The sludge bed of UASB reactor, so as to enhance the compactness of modified attapulgite soil particle, the operation for improving reactor is steady
Qualitative and granule sludge flocculability, optimizes activated sludge, shortens granular sludge process, improves UASB reactor
Removal effect.
(2) a kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the invention, by anti-
The water temperature in device, water flow upflow velocity, water inlet concentration of suspension and water inlet pH value is answered to optimize, so as into one
Step improve UASB reactor operational efficiency and stability, guarantee that the treatment effect of sewage is met the requirements, it is stable after to more
The COD removal rate of kind sewage is up to 90% or more, compared with the UASB reactor for not using modified attapulgite soil particle, sludge
The granulating time can shorten 15d~20d, and cost is relatively low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of UASB reactor of the invention.
Label declaration in schematic diagram:
1, water inlet pipe；2, water-distributing device；3, sludge bed；4, suspended sludge layer；5, effluent weir；6, captation；7, three
Phase separator；8, outlet pipe；9, biogas gas outlet.
Specific embodiment
To further appreciate that the contents of the present invention, now in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
A kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the present embodiment, the steps include:
Step 1: the preparation of modified attapulgite soil particle: carrying out acid activation processing to attapulgite first, then changed
Property processing obtain it is attapulgite modified, modified attapulgite soil particle of the invention is obtained to attapulgite modified be granulated,
The specific steps of which are as follows:
(1) acid activation: the hydrochloric acid solution that molar concentration is 1mol/L is added into attapulgite original soil, vibrates at room temperature
30min is filtered after staticly settling, and adopts that be washed with deionized to pH value be 7, and is dried in 105 DEG C of baking ovens, ground, mistake
Acid activation attapulgite is obtained after sieve, wherein the mass ratio of attapulgite original soil and hydrochloric acid solution is 1:20.Pass through acid activation energy
Enough increase the duct number and specific surface area of attapulgite, and removes the impurity in duct.
(2) modification: being modifying agent with polyquaternium -7, organically-modified to the progress of acid activation attapulgite, is changed
Property attapulgite.Specifically, in the present embodiment by 5 parts of acid activation attapulgite, 1 part of polyquaternium -7,50 parts of deionized water and
50 parts of ethyl alcohol (volumetric concentration 95%) is placed at 80 DEG C and is stirred to react 90min, to be modified processing to attapulgite.
Electrostatic attraction is easily generated with negatively charged microbial cell for above-mentioned polyquaternium -7 and adsorption bridging acts on, and
More stable flocculating property is able to maintain in anaerobic biochemical reactor, so as to effectively facilitate itself immobilization of microorganism into
Journey, and then reinforcing particle process promote the bonding and aggregation of granule sludge, improve the activity and flocculability of sludge.Inventor
By lot of experiments, -7 pairs of acid activation attapulgites progress of final choice polyquaternium are organically-modified, and to polyquaternium -
7, the mixed proportion and reaction temperature of acid activation attapulgite, deionized water and ethyl alcohol, time optimize, so as to
To effectively improve the content of activated sludge Extracellular polymers, shorten granular sludge process, significantly improves the removal effect of reactor
Rate guarantees wastewater treatment efficiency, and lower production costs.Wherein, with the ratio control of polyquaternium -7 and acid activation attapulgite
The most key, the concentration of raising polyquaternium -7, the i.e. mass ratio of reduction attapulgite and polyquaternium -7 are made, is conducive to enhance
The settling property of anaerobic sludge, but the polyquaternium -7 of excessive concentrations will lead to sludge air bearing, and broken rear particle is uneven, thus
Influence using effect.Inventor finally found that through lot of experiments when the mass ratio of attapulgite and polyquaternium -7 is 5:3
, can be on the basis of the settling property that anaerobic sludge is effectively ensured be met the requirements when~10:1, while dirt can be effectively prevent
Mud air bearing, and guarantee the uniformity of broken rear particle, wherein effect when being 5:1 with the mass ratio of attapulgite and polyquaternium -7
It is best.In addition, compared with being added directly attapulgite and polyquaternium -7, it is organically-modified to attapulgite progress to improve grain
Sub dispersibility in the polymer and its associativity with polymer, to be conducive to accelerate granular sludge process.
(3) it is granulated: by the attapulgite and sodium alginate 10:1 in mass ratio after modification, and deionized water is added,
It is granulated through automatic pill-making machine to get the modified attapulgite soil particle for being 2mm to partial size, is sealed.
Powdered attapulgite has that powder is separated with shipwreck after contacting with water, by using sodium alginate to changing
Property attapulgite be granulated, so that the compactness of modified attapulgite soil particle on the one hand can be enhanced, prevent reactor from running
Concave convex rod disperses in the process, improves the stability of reactor operation, and then is further ensured that granular sludge and reactor
Operational effect；Another aspect can also further inventor be passed through in fact by sodium alginate and attapulgite modified effect
It tests the study found that comprehensive use 10:1~15:1, so as to significantly improve the compactness and machinery of modified attapulgite soil particle
Intensity prevents that dispersion and dusting occur in its use process, and makes to be improved to the greatest extent.
Step 2: it is dirty that the sludge bed that UASB reactor is added in the modified attapulgite soil particle being prepared is formed particle
Mud, the additive amount of modified attapulgite soil particle account for the 2% of reactor effective volume, and control the water flow upflow velocity in reactor
For 0.6m/h, water temperature is maintained at 35 DEG C, and the concentration of granule sludge is 64g/L, and suspended sludge layer concentration is 16g/L, and water inlet suspends
Object concentration is lower than 200mg/L, and water inlet pH value is 6.8.The present embodiment by reactor water temperature, water flow upflow velocity, into
Aqueous suspension concentration and water inlet pH value optimize, so as to further increase UASB reactor operational efficiency and
Stability guarantees that the treatment effect of sewage is met the requirements.
As shown in Figure 1, the bottom of UASB reactor is equipped with water-distributing device 2 in the present embodiment, which is installed on dirt
It is connected inside mud bed 3 and with water inlet pipe 1, the top of sludge bed 3 is suspended sludge layer 4；The top of the reactor is equipped with
Three phase separator 7,7 top of three phase separator are equipped with collection chamber, which is connected with biogas escape pipe 9；The reactor
Top is additionally provided with captation 6 and effluent weir 5.It is formed in UASB reactor bottom by anaerobic grain sludge and attapulgite modified
Anaerobic mud bed (i.e. the sludge bed 3) that particle is formed, waste water pass through reactor, upward water by reactor bottom from bottom to top
Stream and the gas generated rise in reactor, generate preferable mixing effect, and Sludge Bed reaction zone top is made to form the dirt that suspends
Mud layer 4；By the three phase separator 7 on reactor top, the three phase separation of gas, liquid, solid is completed, after UASB reactor for treatment
Water outlet is discharged through outlet pipe 8.
Comparative example 1
The service condition of UASB reactor is with embodiment 1, difference in this comparative example: the UASB reaction of this comparative example
Without addition modified attapulgite soil particle in device.It is utilized respectively comparative example 1 and the UASB reactor of embodiment 1 is dense to influent COD
Degree is that the high-concentration printing and dyeing wastewater of 3000mg/L~3500mg/L is handled, the results showed that, the UASB reactor of comparative example 1 needs
Run 65d and be just able to achieve granular sludge, and after the UASB reactor of the present embodiment operation 45d granular sludge effect compared with
Good, the particle size range of granule sludge is 2mm~4mm, and the COD removal rate of dyeing waste water is up to 91%.
Embodiment 2
The method using attapulgite modified Particle Acceleration anaerobic granulation of the present embodiment substantially with embodiment 1,
Its difference essentially consists in: modified attapulgite soil particle accounts for the 5% of reactor effective volume, and pH value 7.2 of intaking, water temperature is maintained at 38
DEG C, the water flow upflow velocity in reactor is 0.8m/h.
Comparative example 2
The service condition of UASB reactor is with embodiment 2, difference in this comparative example: the UASB reaction of this comparative example
Without addition modified attapulgite soil particle in device.It is utilized respectively comparative example 2 and the UASB reactor of embodiment 2 is to COD concentration
The paper waste of 5000mg/L~6000mg/L is handled, the results showed that, the UASB reactor of comparative example 2 needs to run 80d
Granulation of Sludge could be completed, and the UASB reactor of the present embodiment operation 65d can reach stable state, partial size is
The granule sludge of 2mm~2.5mm accounts for the 68% of sludge gross mass, and the removal rate of the COD of paper waste is 94%.
Embodiment 3
The method using attapulgite modified Particle Acceleration anaerobic granulation of the present embodiment substantially with embodiment 1,
Its difference essentially consists in: the number of taken polyquaternium -7 is 3 parts, and modified attapulgite soil particle accounts for reactor effective volume
3%, water inlet pH value is 7.5, and water temperature is 36 DEG C, and the water flow upflow velocity in reactor is 0.7m/h.
Comparative example 3
The service condition of UASB reactor is with embodiment 3, difference in this comparative example: the UASB reaction of this comparative example
Without addition modified attapulgite soil particle in device.It is utilized respectively comparative example 3 and the UASB reactor of embodiment 3 is to COD concentration
The starch wastewater of 5000mg/L~6000mg/L is handled, and the operation result of two UASB reactors shows the UASB of embodiment 3
Reactor granular sludge lasts 50d, and the granular sludge time than the UASB reactor of comparative example 3 shortens 18d, and its is right
The removal rate of the COD of starch wastewater is 96%.
Embodiment 4
A kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the present embodiment, the steps include:
Step 1: the preparation of modified attapulgite soil particle: carrying out acid activation processing to attapulgite first, then changed
Property processing obtain it is attapulgite modified, modified attapulgite soil particle of the invention is obtained to attapulgite modified be granulated,
The specific steps of which are as follows:
(1) acid activation: the hydrochloric acid solution that molar concentration is 0.5mol/L is added into attapulgite original soil, shakes at room temperature
35min is swung, is filtered after staticly settling, adopts that be washed with deionized to pH value be 7, and is dried in 100 DEG C of baking ovens, ground,
Acid activation attapulgite is obtained after sieving, wherein the mass ratio of attapulgite original soil and hydrochloric acid solution is 1:10.
(2) modification: being modifying agent with polyquaternium -7, organically-modified to the progress of acid activation attapulgite, is changed
Property attapulgite.Specifically, in the present embodiment by 8 parts of acid activation attapulgite, 2 parts of polyquaternium -7,60 parts of deionized water and
60 parts of ethyl alcohol (volumetric concentration 90%) is placed at 80 DEG C and is stirred to react 60min, to be modified processing to attapulgite.
(3) it is granulated: by the attapulgite and sodium alginate 15:1 in mass ratio after modification, and deionized water is added,
It is granulated through automatic pill-making machine to get the modified attapulgite soil particle for being 4mm to partial size, is sealed.
Step 2: it is dirty that the sludge bed that UASB reactor is added in the modified attapulgite soil particle being prepared is formed particle
Mud, the additive amount of modified attapulgite soil particle account for the 2% of reactor effective volume, and control the water flow upflow velocity in reactor
For 0.8m/h, water temperature is maintained at 35 DEG C, and the concentration of granule sludge is 100g/L, and suspended sludge layer concentration is 50g/L, and water inlet suspends
Object concentration is lower than 200mg/L, and water inlet pH value is 7.The structure of the UASB reactor of the present embodiment utilizes this implementation with embodiment 1
The UASB reactor of example handles the high-concentration printing and dyeing wastewater that inlet COD concentration is 3000mg/L~3500mg/L, dirty
Mud granulates effect and is closer to the COD removal rate of dyeing waste water with embodiment 1.
Embodiment 5
A kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the present embodiment, the steps include:
Step 1: the preparation of modified attapulgite soil particle: carrying out acid activation processing to attapulgite first, then changed
Property processing obtain it is attapulgite modified, modified attapulgite soil particle of the invention is obtained to attapulgite modified be granulated,
The specific steps of which are as follows:
(1) acid activation: the hydrochloric acid solution that molar concentration is 2.5mol/L is added into attapulgite original soil, shakes at room temperature
40min is swung, is filtered after staticly settling, adopts that be washed with deionized to pH value be 7, and is dried in 120 DEG C of baking ovens, ground,
Acid activation attapulgite is obtained after sieving, wherein the mass ratio of attapulgite original soil and hydrochloric acid solution is 1:15.
(2) modification: being modifying agent with polyquaternium -7, organically-modified to the progress of acid activation attapulgite, is changed
Property attapulgite.Specifically, by 10 parts of acid activation attapulgite, 3 parts of polyquaternium -7,58 parts of deionized water in the present embodiment
It is placed at 80 DEG C with 57 parts of ethyl alcohol (volumetric concentration 95%) and is stirred to react 100min, to be modified place to attapulgite
Reason.
(3) it is granulated: by the attapulgite and sodium alginate 12:1 in mass ratio after modification, and deionized water is added,
It is granulated through automatic pill-making machine to get the modified attapulgite soil particle for being 3mm to partial size, is sealed.
Step 2: it is dirty that the sludge bed that UASB reactor is added in the modified attapulgite soil particle being prepared is formed particle
Mud, the additive amount of modified attapulgite soil particle account for the 5% of reactor effective volume, and control the water flow upflow velocity in reactor
For 0.6m/h, water temperature is maintained at 37 DEG C, and the concentration of granule sludge is 60g/L, and suspended sludge layer concentration is 10g/L, and water inlet suspends
Object concentration is lower than 200mg/L, and water inlet pH value is 7.2.The structure of UASB reactor utilizes this reality with embodiment 1 in the present embodiment
The UASB reactor for applying example handles the paper waste that COD concentration is 5000mg/L~6000mg/L, granular sludge
The removal rate of the COD of rate and paper waste is closer to embodiment 2.
According to embodiment 1-5, the present invention uses attapulgite cheap, from a wealth of sources, can significantly reduce operation
Cost carries out it using polyquaternium -7 organically-modified and recessed to modification by sodium alginate after attapulgite acid activation
Convex stick makes grain with local methods, by the above-mentioned attapulgite modified sludge bed for being granulated addition UASB reactor, while passing through many experiments pair
The parameters such as water flow upflow velocity, water temperature, water inlet pH value, the concentration of granule sludge and suspended sludge layer in reactor optimize
Design improves the operation stability and granule sludge of reactor so as to enhancing the compactness of modified attapulgite soil particle
Flocculability optimizes activated sludge, shortens granular sludge process, guarantees the removal effect of UASB reactor, and this hair
The bright processing that can be perfectly suitable for multiple types sewage.
Claims (7)
1. a kind of method using attapulgite modified Particle Acceleration anaerobic granulation, which is characterized in that the steps include:
Step 1: the preparation of modified attapulgite soil particle: carrying out acid activation processing to attapulgite first, be then modified place
Reason acquisition is attapulgite modified, obtains attapulgite modified particle to attapulgite modified be granulated, specific steps are such as
Under:
(1) acid activation: hydrochloric acid solution being added into attapulgite original soil, vibrate at room temperature, staticly settle after filter, then adopt
Being washed with deionized to pH value is 7, and is dried in 100 DEG C~120 DEG C baking ovens, and it is recessed to obtain acid activation after ground, sieving
Convex stick soil；
(2) modification: being modifying agent with polyquaternium -7, organically-modified to the progress of acid activation attapulgite, obtains being modified recessed
Convex stick soil；The concrete operations of the modification are as follows: by 5~10 parts of acid activation attapulgite, 1~3 part of polyquaternium -7, go from
50~60 parts of sub- water and 50~60 parts of ethyl alcohol, which are placed at 80 DEG C, is stirred to react 60min~100min, to carry out to attapulgite
Modification；
(3) it is granulated: the attapulgite after modification is granulated together with sodium alginate through automatic pill-making machine to get recessed to modification
Convex stick soil particle, is sealed；
Step 2: the sludge bed that UASB reactor is added in modified attapulgite soil particle is formed granule sludge, modified attapulgite
The additive amount of soil particle accounts for the 2%~5% of reactor effective volume, and controlling the water flow upflow velocity in reactor is 0.6m/h
~0.8m/h, water temperature are maintained at 35 DEG C~38 DEG C.
2. a kind of method using attapulgite modified Particle Acceleration anaerobic granulation according to claim 1,
Be characterized in that: it is the hydrochloric acid solution of 0.5mol/L~2.5mol/L to attapulgite original that molar concentration is used in the step (1)
Soil carries out acid activation processing, and the mass ratio of attapulgite original soil and hydrochloric acid solution is 1:20~1:10.
3. a kind of method using attapulgite modified Particle Acceleration anaerobic granulation according to claim 1,
Be characterized in that: the concentration of ethyl alcohol used is 90%~95% in the step (2).
4. a kind of attapulgite modified Particle Acceleration anaerobic granulation of utilization according to any one of claim 1-3
Method, it is characterised in that: the attapulgite modified mixed proportion with sodium alginate is 10:1~15:1 in the step (3),
And deionized water is added and carries out granulation processing.
5. a kind of method using attapulgite modified Particle Acceleration anaerobic granulation according to claim 4,
Be characterized in that: the partial size of gained modified attapulgite soil particle is 2mm~4mm in the step (3).
6. a kind of attapulgite modified Particle Acceleration anaerobic granulation of utilization according to any one of claim 1-3
Method, it is characterised in that: the bottom of the UASB reactor is equipped with water-distributing device (2), which is installed on sludge
Bed (3) is internal and is connected with water inlet pipe (1), and the top of sludge bed (3) is suspended sludge layer (4)；The top of the reactor
Portion is equipped with three phase separator (7), and three phase separator (7) top is equipped with collection chamber, which is connected with biogas escape pipe (9)；
Captation (6) and effluent weir (5) are additionally provided with above the reactor.
7. a kind of attapulgite modified Particle Acceleration anaerobic granulation of utilization according to any one of claim 1-3
Method, it is characterised in that: the concentration of control UASB reactor endoparticle sludge is 60g/L~100g/L, and suspended sludge layer is dense
Degree is 10g/L~50g/L, and water inlet concentration of suspension is lower than 200mg/L, and water inlet pH value is 6.8~7.5.
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| CN107352647B (en) * | 2017-09-08 | 2020-01-07 | 南京大学 | Method for improving anaerobic sludge granulation efficiency |
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| CN110500673B (en) * | 2019-08-28 | 2021-05-07 | 明光市龙盛瑞新材料科技有限公司 | Cabinet type particle attapulgite air purification device |
| CN113354252B (en) * | 2021-07-07 | 2022-02-22 | 浙江桃花源环保科技有限公司 | Sludge drying conditioner and preparation method thereof |
| CN113929109A (en) * | 2021-11-19 | 2022-01-14 | 盱眙凹土能源环保材料研发中心 | Modification method of attapulgite clay and application of modification method to anaerobic and aerobic biochemical treatment method of organic wastewater |
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| CN203668114U (en) * | 2014-01-07 | 2014-06-25 | 南昌元芝环保科技发展有限公司 | UASB (up-flow anaerobic sludge blanket) reactor |
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