CN106630131A - Preparation method of modified attapulgite particles and method for accelerating granulation of anaerobic sludge by modified attapulgite particles - Google Patents
Preparation method of modified attapulgite particles and method for accelerating granulation of anaerobic sludge by modified attapulgite particles Download PDFInfo
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- CN106630131A CN106630131A CN201610935478.2A CN201610935478A CN106630131A CN 106630131 A CN106630131 A CN 106630131A CN 201610935478 A CN201610935478 A CN 201610935478A CN 106630131 A CN106630131 A CN 106630131A
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- 229960000892 attapulgite Drugs 0.000 title claims abstract description 146
- 229910052625 palygorskite Inorganic materials 0.000 title claims abstract description 146
- 239000010802 sludge Substances 0.000 title claims abstract description 110
- 239000002245 particle Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000005469 granulation Methods 0.000 title claims abstract description 27
- 230000003179 granulation Effects 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000008569 process Effects 0.000 claims abstract description 26
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 12
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 12
- 239000000661 sodium alginate Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims description 63
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims description 47
- 239000002253 acid Substances 0.000 claims description 31
- 238000001994 activation Methods 0.000 claims description 31
- 230000004913 activation Effects 0.000 claims description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 24
- 229920000289 Polyquaternium Polymers 0.000 claims description 23
- 239000008187 granular material Substances 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 230000001133 acceleration Effects 0.000 claims description 12
- 238000012986 modification Methods 0.000 claims description 11
- 230000004048 modification Effects 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 25
- 239000002351 wastewater Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 239000007900 aqueous suspension Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000004043 dyeing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010893 paper waste Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920000620 organic polymer Polymers 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002734 clay mineral Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- UGGQKDBXXFIWJD-UHFFFAOYSA-N calcium;dihydroxy(oxo)silane;hydrate Chemical compound O.[Ca].O[Si](O)=O UGGQKDBXXFIWJD-UHFFFAOYSA-N 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a preparation method of modified attapulgite particles and a method for accelerating granulation of anaerobic sludge by the modified attapulgite particles and belongs to the technical field of water treatment. An anaerobic sludge blanket formed by anaerobic granular sludge and the modified attapulgite particles is formed at the bottom of a UASB (upflow anaerobic sludge blanket) reactor, attapulgite is granulated with sodium alginate after being modified with polyquaternium-7, then the modified attapulgite particles are fed into the anaerobic sludge, and the modified attapulgite particles account for 2%-5% of active volume of the UASB reactor; wastewater passes through the reactor from the bottom of the reactor from bottom to top, upward water flow and produced gas rise in the reactor, a better stirring effect is realized, and a suspended sludge layer is formed at the upper part of a sludge blanket reaction area. The modified attapulgite particles are added to active sludge, so that activity and flocculability of the sludge can be enhanced, content of extracellular polymeric substances of the active sludge is increased, the sludge granulation process is shortened, the removal rate of the reactor is increased, besides, the cost is lower, and the stability is good.
Description
Technical field
The present invention relates to water-treatment technology field, more particularly, it relates to a kind of preparation side of modified attapulgite soil particle
Method and the method for accelerating anaerobic granulation using it.
Background technology
UASB reactors, 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, was developed in 1977 by the Lettinga professors of Holland.Sewage leads to from bottom to top
Anaerobic mud bed reactor is crossed, reactor bottom is high concentration, highly active sludge blanket, and most of organic matter heres are converted into
CH4、CO2.The current of rising and the nitrification gas for producing make sludge blanket top form relatively lean suspended sludge layer.UASB is anti-
Device top is answered to be provided with three phase separator, gas is collected into the collection chamber of three phase separator, and the granule sludge after degassing sinks
Form sediment to the sludge blanket of reaction zone, clear water Jing tops captation is collected from effluent weir and flowed out.UASB reactors have equipment it is simple,
Operation is convenient, need not arrange sedimentation basin and sludge reflux, without the need for packing material the advantages of.But during the startup of existing UASB reactors
Between it is longer, it is larger by the performance impact of granule sludge, therefore efficiently start the key of UASB reactors and be that culture settleability
The good anaerobic grain sludge of energy, shortens the process of granular sludge.
At present, a large amount of domestic and international researchers are all being devoted to accelerating the research of granular sludge technology, and achieve certain
Effect, at present widely used method mainly have addition inorganic metal salt, high-speed mixing method, add organic polymer and
Add inert carrier particle thing.Wherein, inorganic metal salt is added, can using the effect such as its charge neutrality Electrostatic Absorption and adsorption bridging
To play a part of to promote the granule sludge just aggregation of adult and bonding, but some heavy metal ion can be to anaerobic grain sludge
Methanogenesis activity produces stronger inhibitory action, so as to affect granulating process, and most metal ions easily with anaerobic system in
CO3 2-Sediment is combined to form, degraded is difficult in inside reactor fouling and is removed.High-speed mixing method can increase muddy water contact
Area, has efficiently ensured the supply of sludge nutriment, but it must use highly active anaerobic sludge and operating procedure is loaded down with trivial details,
Energy consumption is higher.Add high polymer used by organic polymer and be usually cationic, and the big multipair microorganism of such compound has one
Determine toxicity, and suppress the activity of anaerobe, though therefore its addition has certain promotion to the pelletising process of sludge,
Effect is little, it is difficult to meet use requirement, especially in culture middle and later periods, suppression of these organic polymers to anaerobe
Property starts to play a leading role.Inert carrier particle thing, such as powdery zeolite, xonotlite fibrous particle etc. are added, anaerobism can be accelerated micro-
The biological richness product on its surface, accelerates granular sludge, but not biodegradable because adding inert material, just reduces in the course of time
The dischargeable capacity of reactor, and add excessive particle and can hinder the sludge just aggregation of adult and bonding, for granule sludge
Growth do harm rather than good.
Therefore, develop that a kind of new and the preferable granular sludge accelerated method of effect always is that domestic and international researcher is thought
The technical barrier to be solved.Jing is retrieved, and the patent report with regard to shortening granular sludge process is existing related open.Such as middle promulgated by the State Council
Bright patent CN 201310169107.4 discloses a kind of method of acceleration anaerobic granulation, and this application case is mixed to sludge
Close and add simultaneously in liquid system granular activated carbon and polyquaternium, to a certain extent can using granular activated carbon and high polymer
Effectively accelerate the granulating speed of sludge, strengthen granular sludge effect, but the cost of activated carbon is of a relatively high, so as to cause it
Engineering application is restricted.
Attapulgite (rich magnesium silicate clay mineral) is China's abundance and a kind of clay mineral with low cost, interior
Portion's multi-pore channel, cavity, specific surface area is big, can increase the contact area of microorganism and inertia core, accelerates microorganism in its table
The aggregation in face.Therefore, attapulgite is used for existing researcher the culture of granule sludge, to shortening granular sludge
Time, accelerate granular sludge process, e.g., Chinese invention patent CN 201410074518.X disclose a kind of using modified recessed
The method that convex rod earth culture supports aerobic nitrifying granular activated sludge, the method is will to be modified place using sulfuric acid after the crushing of concave convex rod original soil
Reason, then screening the modified attapulgite of 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 being cultivated activated sludge to a certain degree using the modified attapulgite of this application case
On can shorten time of granular sludge, its COD clearance is also of a relatively high, but concave convex rod easily occurs point in this application case
Scattered, stability is relatively poor, so as to affect the effect of granular sludge.
The content of the invention
1. the invention technical problem to be solved
It is an object of the invention to overcome the granulating process of anaerobic sludge used by existing UASB reactors relatively slow, it is living
Property sludge performance need further raising, so as to cause the startup of UASB reactors slower, the treatment effect of sewage is difficult to
Meet require deficiency, there is provided a kind of preparation method of modified attapulgite soil particle and using its accelerate anaerobic granulation
Method.The present invention in activated sludge by adding modified attapulgite soil particle such that it is able to strengthens, promotes the wadding of microorganism
Solidifying effect, accelerates granular sludge process, and improves the content of activated sludge Extracellular polymers, and then improves the removal of reactor
Efficiency, it is ensured that wastewater treatment efficiency.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
A kind of preparation method of modified attapulgite soil particle of the present invention, the method carries out acid activation to attapulgite first
Process, be then modified process and obtain attapulgite modified, attapulgite modified granulation obtain the present invention and change
Property attapulgite particle, it is comprised the following steps that：
(1) acid activation：Add hydrochloric acid solution in attapulgite original soil, vibrate at room temperature, staticly settle after filter, so
After adopt be washed with deionized to pH value be 7, and in 100 DEG C～120 DEG C baking ovens dry, it is ground, sieve after obtain sour work
Change attapulgite；
(2) modification：With polyquaternium -7 as modifying agent, acid activation attapulgite is carried out organically-modified, changed
Property attapulgite；
(3) granulate：By the attapulgite after modification and sodium alginate, by a certain percentage Jing automatic pill-making machines are granulated, i.e.,
Obtain modified attapulgite soil particle, sealing preserve.
Further, adopt molar concentration in the step (1) for 0.5mol/L～2.5mol/L hydrochloric acid solution pair
Attapulgite original soil carries out acid activation process, and attapulgite original soil and the mass ratio of hydrochloric acid solution are 1:20～1:10.
Further, by 5～10 parts of acid activation attapulgite in the step (2), 1～3 part of polyquaternium -7 goes
50～60 parts of 50～60 parts of ionized water and ethanol be placed in 80 DEG C at stirring reaction 60min～100min, so as to enter to attapulgite
Row modification.
Further, the concentration of ethanol used is 90%～95% in the step (2).
Further, the attapulgite modified mixed proportion with sodium alginate is 10 in the step (3):1～15:1,
And add deionized water to carry out granulation process.
Further, the particle diameter 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 present invention, its step is：
The preparation of step one, modified attapulgite soil particle：Prepared using the method any one of claim 1-6 and changed
Property attapulgite particle；
Step 2, the sludge bed formation granule sludge that modified attapulgite soil particle is added UASB reactors, are modified recessed
The addition of convex rod soil particle accounts for the 2%～5% of reactor effective volume, and controls the current upflow velocity in reactor and be
0.6m/h～0.8m/h, water temperature is maintained at 35 DEG C～38 DEG C.
Further, the bottom of the UASB reactors is provided with water-distributing device, and the water-distributing device is installed on sludge bed
Internal and be connected with water inlet pipe, the top of sludge bed is suspended sludge layer；Three phase separator is provided with the top of the reactor,
Three phase separator top is provided with collection chamber, and the collection chamber is connected with biogas escaping pipe；It is additionally provided with above the reactor and catchments
Device and effluent weir.
Further, the concentration for controlling UASB reactor endoparticle sludge is 60g/L～100g/L, and suspended sludge layer is dense
Spend for 10g/L～50g/L, water inlet concentration of suspension is less than 200mg/L, water inlet pH value is 6.8～7.5.
3. beneficial effect
The technical scheme provided using the present invention, compared with prior art, with following remarkable result：
(1) a kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the invention, using price
Cheap, wide material sources attapulgites, can significantly reduce operating cost, by attapulgite acid activation after, using polyquaternium-
7 pairs its carry out organically-modified, and by sodium alginate to attapulgite modified granulation, above-mentioned attapulgite modified granulation is added
The sludge bed of UASB reactors such that it is able to strengthen the compactness of modified attapulgite soil particle, the operation for improving reactor is steady
The flocculability of qualitative and granule sludge, is optimized to activated sludge, shortens granular sludge process, improves UASB reactors
Removal effect.
(2) a kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the invention, by anti-
The water temperature in device, current upflow velocity, water inlet concentration of suspension and water inlet pH value is answered to be optimized design, such that it is able to enter one
Step improves the operational efficiency and stability of UASB reactors, it is ensured that the treatment effect of sewage meets and requires, it is stable after to many
The COD clearances of sewage are planted up to more than 90%, compared with the UASB reactors for being provided without modified attapulgite soil particle, sludge
The granulating time can shorten 15d～20d, and cost is relatively low.
Description of the drawings
Fig. 1 is the structural representation of the UASB reactors of the present invention.
Label declaration in schematic diagram：
1st, water inlet pipe；2nd, water-distributing device；3rd, sludge bed；4th, suspended sludge layer；5th, effluent weir；6th, captation；7th, three
Phase separator；8th, outlet pipe；9th, biogas gas outlet.
Specific embodiment
To further appreciate that present disclosure, 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, its step is：
The preparation of step one, modified attapulgite soil particle：First acid activation process is carried out to attapulgite, then changed
Property process obtain it is attapulgite modified, to it is attapulgite modified granulated obtain the present invention modified attapulgite soil particle,
It is comprised the following steps that：
(1) acid activation：Add molar concentration for the hydrochloric acid solution of 1mol/L in attapulgite original soil, vibrate at room temperature
30min, after staticly settling filter, adopt be washed with deionized to pH value be 7, and in 105 DEG C of baking ovens dry, ground, mistake
Acid activation attapulgite is obtained after sieve, wherein attapulgite original soil and the mass ratio of hydrochloric acid solution are 1:20.By acid activation energy
Enough increase the duct number and specific surface area of attapulgite, and remove the impurity in duct.
(2) modification：With polyquaternium -7 as modifying agent, acid activation attapulgite is carried out organically-modified, 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 ethanol (volumetric concentration is 95%) be placed in 80 DEG C at stirring reaction 90min, so as to be modified process to attapulgite.
Above-mentioned polyquaternium -7 easily produces electrostatic attraction with negatively charged microbial cell and adsorption bridging is acted on, and
More stable flocculating property can be kept in anaerobic biochemical reactor such that it is able to which itself immobilization for effectively facilitating microorganism is entered
Journey, and then reinforcing particle process, promote bonding and the aggregation of granule sludge, improve the activity and flocculability of sludge.Inventor
Through lot of experiments, -7 pairs of acid activation attapulgites of final choice polyquaternium carry out it is organically-modified, and to polyquaternium -
7th, the mixed proportion and reaction temperature of acid activation attapulgite, deionized water and ethanol, time be optimized design, so as to can
To effectively improve the content of activated sludge Extracellular polymers, shorten granular sludge process, significantly improve the removal effect of reactor
Rate, it is ensured that wastewater treatment efficiency, and production cost is relatively low.Wherein, with the ratio control of polyquaternium -7 and acid activation attapulgite
System is the most key, improves the concentration of polyquaternium -7, that is, reduce the mass ratio of attapulgite and polyquaternium -7, is conducive to strengthening
The settling property of anaerobic sludge, but the polyquaternium -7 of excessive concentrations can cause sludge air supporting, and broken rear particle is uneven, so as to
Affect using effect.Inventor's Jing lot of experiments, finally found that when the mass ratio of attapulgite and polyquaternium -7 is 5:3
～10:When 1, on the basis of requirement can be met the settling property of anaerobic sludge is effectively ensured, while dirt can be prevented effectively
Mud air supporting, and ensure the uniformity of broken rear particle, wherein with the mass ratio of attapulgite and polyquaternium -7 as 5:Effect when 1
It is best.Additionally, compare with polyquaternium -7 with attapulgite is directly added, attapulgite is carried out organically-modified to improve grain
The son dispersed and its associativity with polymer in the polymer, so as to be conducive to accelerating granular sludge process.
(3) granulate：By the attapulgite after modification and sodium alginate in mass ratio 10:1, and deionized water is added,
Jing automatic pill-making machines are granulated, that is, obtain the modified attapulgite soil particle that particle diameter is 2mm, sealing preserve.
There are problems that powder is detached with shipwreck after the contact of powder attapulgite and water, by using sodium alginate to changing
Property attapulgite granulated, so as to one side can strengthen the compactness of modified attapulgite soil particle, prevent reactor from running
During concave convex rod disperse, improve the stability of reactor operation, and then be further ensured that granular sludge and reactor
Operational effect；On the other hand further inventor can also pass through real with attapulgite modified effect by sodium alginate
Test research to find, comprehensively use 10:1～15:1, such that it is able to significantly improve the compactness and machinery of modified attapulgite soil particle
Intensity, prevents dispersion and efflorescence during its use, and makes farthest to be improved.
Step 2, the sludge bed formation particle dirt that the modified attapulgite soil particle for preparing is added UASB reactors
Mud, the addition of modified attapulgite soil particle accounts for the 2% of reactor effective volume, and controls the current 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, enters aqueous suspension
Thing concentration is less than 200mg/L, and water inlet pH value is 6.8.The present embodiment by the water temperature in reactor, current upflow velocity, enter
Aqueous suspension concentration and water inlet pH value are optimized design, such that it is able to the further operational efficiency of raising UASB reactors and
Stability, it is ensured that the treatment effect of sewage meets requirement.
As shown in figure 1, the bottom of UASB reactors is provided with water-distributing device 2 in the present embodiment, the water-distributing device 2 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；It is provided with the top of the reactor
Three phase separator 7, the top of three phase separator 7 is provided with collection chamber, and the collection chamber is connected with biogas escaping pipe 9；The reactor
Top is additionally provided with captation 6 and effluent weir 5.Formed by anaerobic grain sludge and attapulgite modified in UASB reactor bottoms
Granuloplastic anaerobic mud bed (i.e. sludge bed 3), waste water by reactor bottom from bottom to top by reactor, water upwards
Stream and the gas for producing rise in reactor, produce preferable mixing effect, make Sludge Bed reaction zone top form suspension dirty
Mud layer 4；By the three phase separator 7 on reactor top, the three phase separation of gas, liquid, solid is completed, Jing after UASB reactor for treatment
Water outlet Jing outlet pipes 8 are discharged.
Comparative example 1
With embodiment 1, its difference is the service condition of UASB reactors in this comparative example：The UASB reactions of this comparative example
Modified attapulgite soil particle is not added in device.It is utilized respectively comparative example 1 dense to influent COD with the UASB reactors of embodiment 1
Spend the high-concentration printing and dyeing wastewater for 3000mg/L～3500mg/L to be processed, as a result show, the UASB reactors of comparative example 1 are needed
Running 65d could realize granular sludge, and after the UASB reactors 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 clearances of dyeing waste water are up to 91%.
Embodiment 2
The method of the attapulgite modified Particle Acceleration anaerobic granulation of utilization of the present embodiment substantially with embodiment 1,
Its difference is essentially consisted in：Modified attapulgite soil particle accounts for the 5% of reactor effective volume, pH value 7.2 of intaking, and water temperature is maintained at 38
DEG C, the current upflow velocity in reactor is 0.8m/h.
Comparative example 2
With embodiment 2, its difference is the service condition of UASB reactors in this comparative example：The UASB reactions of this comparative example
Modified attapulgite soil particle is not added in device.Be utilized respectively comparative example 2 is to COD concentration with the UASB reactors of embodiment 2
The paper waste of 5000mg/L～6000mg/L is processed, and is as a result shown, the UASB reactors of comparative example 2 need to run 80d
Granulation of Sludge can be just completed, and the UASB reactors of the present embodiment operation 65d can reach stable state, particle diameter is
The granule sludge of 2mm～2.5mm accounts for the 68% of sludge gross mass, and the clearance of the COD of paper waste is 94%.
Embodiment 3
The method of the attapulgite modified Particle Acceleration anaerobic granulation of utilization of the present embodiment substantially with embodiment 1,
Its difference is essentially consisted 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 current upflow velocity in reactor is 0.7m/h.
Comparative example 3
With embodiment 3, its difference is the service condition of UASB reactors in this comparative example：The UASB reactions of this comparative example
Modified attapulgite soil particle is not added in device.Be utilized respectively comparative example 3 is to COD concentration with the UASB reactors of embodiment 3
The starch wastewater of 5000mg/L～6000mg/L is processed, and the operation result of two UASB reactors shows, the UASB of embodiment 3
Reactor granular sludge lasts 50d, and than the granular sludge time of the UASB reactors of comparative example 3 18d is shortened, and its is right
The clearance 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, its step is：
The preparation of step one, modified attapulgite soil particle：First acid activation process is carried out to attapulgite, then changed
Property process obtain it is attapulgite modified, to it is attapulgite modified granulated obtain the present invention modified attapulgite soil particle,
It is comprised the following steps that：
(1) acid activation：Add molar concentration for the hydrochloric acid solution of 0.5mol/L in attapulgite original soil, shake at room temperature
Swing 35min, after staticly settling filter, adopt be washed with deionized to pH value be 7, and in 100 DEG C of baking ovens dry, it is ground,
Acid activation attapulgite is obtained after sieving, wherein attapulgite original soil and the mass ratio of hydrochloric acid solution are 1:10.
(2) modification：With polyquaternium -7 as modifying agent, acid activation attapulgite is carried out organically-modified, 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 ethanol (volumetric concentration is 90%) be placed in 80 DEG C at stirring reaction 60min, so as to be modified process to attapulgite.
(3) granulate：By the attapulgite after modification and sodium alginate in mass ratio 15:1, and deionized water is added,
Jing automatic pill-making machines are granulated, that is, obtain the modified attapulgite soil particle that particle diameter is 4mm, sealing preserve.
Step 2, the sludge bed formation particle dirt that the modified attapulgite soil particle for preparing is added UASB reactors
Mud, the addition of modified attapulgite soil particle accounts for the 2% of reactor effective volume, and controls the current 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, enters aqueous suspension
Thing concentration is less than 200mg/L, and water inlet pH value is 7.The structure of the UASB reactors of the present embodiment with embodiment 1, using this enforcement
High-concentration printing and dyeing wastewater of the UASB reactors of example to inlet COD concentration for 3000mg/L～3500mg/L is processed, and it is dirty
Mud granulates effect and the COD clearances to dyeing waste water are closer to embodiment 1.
Embodiment 5
A kind of method using attapulgite modified Particle Acceleration anaerobic granulation of the present embodiment, its step is：
The preparation of step one, modified attapulgite soil particle：First acid activation process is carried out to attapulgite, then changed
Property process obtain it is attapulgite modified, to it is attapulgite modified granulated obtain the present invention modified attapulgite soil particle,
It is comprised the following steps that：
(1) acid activation：Add molar concentration for the hydrochloric acid solution of 2.5mol/L in attapulgite original soil, shake at room temperature
Swing 40min, after staticly settling filter, adopt be washed with deionized to pH value be 7, and in 120 DEG C of baking ovens dry, it is ground,
Acid activation attapulgite is obtained after sieving, wherein attapulgite original soil and the mass ratio of hydrochloric acid solution are 1:15.
(2) modification：With polyquaternium -7 as modifying agent, acid activation attapulgite is carried out organically-modified, 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
Stirring reaction 100min at being placed in 80 DEG C with 57 parts of ethanol (volumetric concentration is 95%), so as to be modified place to attapulgite
Reason.
(3) granulate：By the attapulgite after modification and sodium alginate in mass ratio 12:1, and deionized water is added,
Jing automatic pill-making machines are granulated, that is, obtain the modified attapulgite soil particle that particle diameter is 3mm, sealing preserve.
Step 2, the sludge bed formation particle dirt that the modified attapulgite soil particle for preparing is added UASB reactors
Mud, the addition of modified attapulgite soil particle accounts for the 5% of reactor effective volume, and controls the current 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, enters aqueous suspension
Thing concentration is less than 200mg/L, and water inlet pH value is 7.2.The structure of UASB reactors is with embodiment 1 in the present embodiment, using this reality
Apply paper waste of the UASB reactors of example to COD concentration for 5000mg/L～6000mg/L to process, its granular sludge
The clearance of the COD of speed and paper waste is closer to embodiment 2.
According to embodiment 1-5, the present invention uses cheap, wide material sources attapulgites, can significantly reduce operation
Cost, by attapulgite acid activation after, it is carried out using polyquaternium -7 it is organically-modified, and by sodium alginate to modified recessed
Convex rod makes grain with local methods, above-mentioned attapulgite modified granulation is added into the sludge bed of UASB reactors, while passing through many experiments pair
The parameters such as the concentration of current upflow velocity, water temperature, water inlet pH value, granule sludge and suspended sludge layer in reactor are optimized
Design such that it is able to strengthen the compactness of modified attapulgite soil particle, improves the operation stability and granule sludge of reactor
Flocculability, is optimized to activated sludge, shortens granular sludge process, it is ensured that the removal effect of UASB reactors, and this
The bright process that can be perfectly suitable for polytype sewage.
Claims (9)
1. a kind of preparation method of modified attapulgite soil particle, it is characterised in that：The method carries out sour work to attapulgite first
Change is processed, and is then modified process and is obtained attapulgite modified, obtains the present invention's to attapulgite modified granulation
Modified attapulgite soil particle, it is comprised the following steps that：
(1) acid activation：Add hydrochloric acid solution in attapulgite original soil, vibrate at room temperature, staticly settle after filter, then adopt
It is 7 to be washed with deionized to pH value, and is dried in 100 DEG C～120 DEG C baking ovens, it is ground, sieve after to obtain acid activation recessed
Convex rod soil；
(2) modification：With polyquaternium -7 as modifying agent, acid activation attapulgite is carried out organically-modified, obtain modified recessed
Convex rod soil；
(3) granulate：The Jing automatic pill-making machines granulation together with sodium alginate by the attapulgite after modification, that is, obtain modified recessed
Convex rod soil particle, sealing preserve.
2. the preparation method of a kind of modified attapulgite soil particle according to claim 1, it is characterised in that：The step
(1) molar concentration is adopted in carries out acid activation process for the hydrochloric acid solution of 0.5mol/L～2.5mol/L to attapulgite original soil,
And attapulgite original soil and the mass ratio of hydrochloric acid solution are 1:20～1:10.
3. the preparation method of a kind of modified attapulgite soil particle according to claim 1, it is characterised in that：The step
(2) by 5～10 parts of acid activation attapulgite in, 1～3 part of polyquaternium -7,50～60 parts of 50～60 parts of deionized water and ethanol
Stirring reaction 60min～100min at being placed in 80 DEG C, so as to be modified process to attapulgite.
4. the preparation method of a kind of modified attapulgite soil particle according to claim 3, it is characterised in that：The step
(2) concentration of ethanol used is 90%～95% in.
5. the preparation method of a kind of modified attapulgite soil particle according to any one of claim 1-4, it is characterised in that：
The attapulgite modified mixed proportion with sodium alginate is 10 in the step (3):1～15:1, and add deionized water to carry out
Granulation is processed.
6. the preparation method of a kind of modified attapulgite soil particle according to claim 5, it is characterised in that：The step
(3) particle diameter of gained modified attapulgite soil particle is 2mm～4mm in.
7. a kind of method using attapulgite modified Particle Acceleration anaerobic granulation, it is characterised in that its step is：
The preparation of step one, modified attapulgite soil particle：Prepared using the method any one of claim 1-6 modified recessed
Convex rod soil particle；
Step 2, the sludge bed formation granule sludge that modified attapulgite soil particle is added UASB reactors, modified attapulgite
The addition of soil particle accounts for the 2%～5% of reactor effective volume, and controls the current upflow velocity in reactor for 0.6m/h
～0.8m/h, water temperature is maintained at 35 DEG C～38 DEG C.
8. a kind of method using attapulgite modified Particle Acceleration anaerobic granulation according to claim 7, its
It is characterised by：The bottom of the UASB reactors is provided with water-distributing device (2), and the water-distributing device (2) is installed in sludge bed (3)
Portion and it is connected with water inlet pipe (1), the top of sludge bed (3) is suspended sludge layer (4)；Three-phase is provided with the top of the reactor
Separator (7), three phase separator (7) top is provided with collection chamber, and the collection chamber is connected with biogas escaping pipe (9)；The reactor
Top be additionally provided with captation (6) and effluent weir (5).
9. a kind of method using attapulgite modified Particle Acceleration anaerobic granulation according to claim 7 or 8,
It is characterized in that：The concentration for controlling UASB reactor endoparticle sludge is 60g/L～100g/L, and suspended sludge layer concentration is 10g/
L～50g/L, water inlet concentration of suspension is less than 200mg/L, and water inlet pH value is 6.8～7.5.
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| CN110500673A (en) * | 2019-08-28 | 2019-11-26 | 明光市龙盛瑞新材料科技有限公司 | A kind of cabinet type particle concave-convex stick air purification device |
| CN113354252A (en) * | 2021-07-07 | 2021-09-07 | 浙江桃花源环保科技有限公司 | Novel 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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