CN103880169A - Method for culturing denitrified aerobic granular sludge by using purified attapulgite carrier - Google Patents
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Abstract
The invention discloses a method for culturing denitrified aerobic granular sludge by using a purified attapulgite carrier, and belongs to the technical field of biological treatment of wastewater. The method comprises the following steps: performing purification treatment on crushed attapulgite by using sodium hexametaphosphate for later use; culturing aerobic denitrified granular sludge by using the purified attapulgite; putting activated sludge as seed sludge in an aerobiotic tank in an urban sewage treatment plant into styrene butadiene rubber (SBR); putting the purified attapulgite into the SBR at one time in the early starting period of a reactor, wherein the purified attapulgite accounts for 1% of the effective volume of the SBR, the volume exchange rate is 50-60%, and the water temperature is maintained at 25 DEG C, and the SBR reactor comprises operation steps of water feeding, aeration, precipitation and water discharging, and is in periodic operation. The method is applicable to culture and domestication of denitrified aerobic granular sludge, and a satisfactory effect can be achieved within a short time.
Description
Technical field
The invention belongs to biological wastewater treatment technology field, design a kind of aerobic particle mud that adds purification Attapulgite carrier fast culture and have denitrification functions in sbr reactor device.
Background technology
The research of aerobic particle mud starts from early 1990s, utilizes pure oxygen aeration by Mishima and Shin etc., successfully cultivation place aerobic particle mud.In recent years, aerobic particle mud, as a kind of emerging waste water treatment process growing up on activated sludge process basis, can better overcome above these problems that exist in activated sludge process, has therefore caused and has paid close attention to widely both at home and abroad and pay attention to.The advantage main manifestations of aerobic particle mud is:
(1) improved the biological concentration in reactor
In the ordinary course of things, active sludge is loosely organized, is difficult to obtain high-concentration biological amount in reactor.Granular mud can address this problem.
(2) improved the settling property of mud
Granule sludge has good settling property, thereby can greatly reduce settling tank volume or save extra settling system device.In addition, in system, need to keep higher microorganism concn, and good settling property makes mud easily and liquid separation hold and stay in reactor, thereby guaranteed longer sludge retention time.
(3) improved the speed of mass transfer.
The specific surface area of granule sludge is very large, is conducive to the transmission of reactor mesostroma, thereby is conducive to improve the speed of biological respinse.
(4) be convenient to remove aging microbial film and excess sludge in reactor
For granular mud, can pass through the adjustment of water conservancy condition, utilize suitable flow shear and particle collision effect, remove the aging microbial film on suspending carrier, thereby guarantee the operation of reactor efficient stable.
Aerobic particle mud is the particulate state microorganism polymer with spherical rule forming by microorganism self-cohesion action.Self flocculate in value-added aerobic granular process in this microorganism; numerous microorganisms are wrapped in the network frame of thread fungus formation by the outer polymer of born of the same parents; owing to having stronger metabolism complementarity between various microorganisms; thereby can realize complicated organic degraded, bear compared with features such as high organic loading, tolerance toxic substances.But be mostly confined to the experimental phase for the research of aerobic particle mud at present, less for Practical, its concrete reason is that culture cycle is very long, particle maturation was generally about two months, and ripe particle easily disintegrates in During Process of Long-term Operation, this restriction has limited popularization and the industrialization of aerobic particle mud greatly.The formation of anaerobic grain sludge is by boot kernel at present, similar crystal growing process, and progressively granular academic viewpoint is reached common understanding, but still there is dispute in the formation mechanism of aerobic grain.Nucleus hypothesis thinks that granular sludge is similar to crystallisation process, and on nucleus basis, the continuous enrichment of microorganism, finally forms granule sludge.Nucleus generally derives from the inorganic salt precipitation or the inertia organism that in reactor operational process, produce.Nucleus hypothesis is the viewpoint of most scholar approval.
Utilizing people is that to add the fast culture that outer carrier realizes aerobic particle mud be current a kind of effective workaround.Attapulgite has another name called polygorskite or Palygorskite, be a kind of layer of chain-like structure containing Shuifu County's zeopan clay mineral.Within 1862, Viktor Savchenko is found in Soviet Union Ural, 1913, expense father Si Man according to found mining area its called after Palygorskite.In the Attapulgus area of Georgia, USA and French More rub the Fuller's earth in grand area, also find this kind of mineral afterwards, and adopted the name of Attapulgite by La Bailiante nineteen thirty-five.1976, Chinese scholar Xu Jiquan took into account the crystal structure characteristic in this ore deposit simultaneously according to the sound in concavo-convex fort, be translated into " attapulgite ", passed and used at home in recent years.Early eighties, finds attapulgite clay ore deposit first in area, Xuyi, Jiangsu Province, China, and its crystal shape is bar-shaped, fibrous, needle-like, long 0.5-5 micron, wide 0.05-0.15 micron, is 2:1 type clay mineral, be two-layer silicon-oxy tetrahedron, one deck alumina octahedral, its molecular formula is: Mg
5si
8o
20(HO)
2(OH
2)
4h
2o.The basic structure of attapulgite is divided into 3 levels: basic structural unit is bar-shaped or fibrous, single crystal, and the brilliant diameter of rod is the 0.01 μ m order of magnitude, length can reach 0.1-1 μ m; The brilliant bundle of rod being formed by the parallel gathering of monocrystalline; Mutually assemble by crystalline substance bundle (comprising that rod is brilliant) the various aggregates of piling up and form, particle diameter is generally the 0.01-0.1mm order of magnitude.Attapulgite has the plasticity-of height moisture in the situation that, good stability in high temperature and salt solution, and density is less, is generally 2.05-2.30g/cm3, and Mohs' hardness is 2-3, when being heated to 700 to 800 ℃, its hardness >5.Attapulgite clay has unique chain layered crystal structure, and this structure has been given the physicochemical property of the many uniquenesses of attapulgite.Mainly comprise adsorptivity, carrier, catalytic, plasticity-and rheological etc.Attapulgite has special pore passage structure, interfacial property and larger specific surface area, becomes a kind of desirable support of the catalyst, can be directly or by after suitable surperficial purification processes for solid-carried catalyst.
Attapulgite raw ore all contains a large amount of impurity, as montmorillonite, illite and carbonate etc., the existence of impurity affects the use properties of attapulgite hybrid, need to could improve the result of use of attapulgite hybrid and reach various application targets through purification processes, could be used as high-grade solid support material.The performance of improving attapulgite by purification is one of emphasis direction of attapulgite deep processing research.Purification is to realize attapulgite deep processing, and the most important condition of exploitation high added value, hi-tech and high-grade product, only has high-grade attapulgite concentrate product of acquisition, just can be processed into high-quality product.At present main purification techniques has two kinds of dry method and wet methods.Dry purification cost is low, technical process is simpler, but refining effect is limited, is only applicable to the ore that head grade is good, attapulgite content is high; Wet purification precision is high, but needs a large amount of water, also will further dehydrate grinding after purification, and cost is relatively high, and refined product is mainly used in the industry higher to attapulgite purity requirement.China has verified that attapulgite ore deposit grade is lower, and attapulgite average content is not high, and most of massfraction, below 50%, generally adopts wet purification.The purifying technique flow process of wet method is that raw ore extruding is pulverized, soaked, have or without dispersion agent condition under stir, adopt method separation, impurity removal, the pressure-filteration dryings such as centrifugal or sedimentation, obtain the prefinished products of attapulgite hybrid.Simple physico-chemical process purifying technique flow process is simple, but that ubiquity yield is low, the problems such as production cost height.The collaborative method of dispersion agent is purified jointly, realizes purifying and the super-refinement of attapulgite clay, has higher commercial viability.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and utilizes purification Attapulgite as carrier, the method for rapidly cultivating aerobic particle sludge.
Technical scheme of the present invention comprises the steps:
(1) pre-treatment: by broken block white Attapulgite original soil and pulverizing, pulverize to be placed in dry encloses container and preserve, for subsequent use.
(2) get distilled water, Attapulgite original soil is added in distilled water than 1:10-1:5 according to native water specific mass, rapid stirring 30-40min, is mixed with certain density attapulgite ore pulp; Take again Sodium hexametaphosphate 99 as dispersion agent, consumption is the 2%-4% of Attapulgite original soil quality, fully mix with (300-500) r/min speed and stir 2-3h, after dispersion agent fully acts on, to there is obvious layering stable in standing 30-40min, and upper strata is the mixed solution of enrichment Attapulgite, lower floor is the impurity such as quartz, get upper strata suspension and be placed in dry 12-18h at 105 ℃, gained is and disperses purification Attapulgite, pack sealing; Ground 40 mesh standard sieves purification Attapulgite was screened, chose the purification Attapulgite of particle size range at 0.4-0.5mm, burnt 2h at 360 ℃, and be placed in dry encloses container and preserve, for subsequent use;
(3) cultivate aerobic nitrogen removal granule sludge with step (2) purification Attapulgite: the active sludge of municipal sewage plant's Aerobic Pond is packed in SBR as kind of mud, the reactor start-up initial stage is to disposable step (2) the purification Attapulgite that adds in SBR, the Attapulgite that makes to purify accounts for 1% of SBR effective volume, then operation, SBR volume exchange rate is 50%-60%, preferably 50%; Maintain water temperature at 25 ℃; PH is at 7.0-8.0, and the operation scheme of sbr reactor device is: water inlet-aeration-precipitation-draining, carry out periodic duty; Preferably be 7 hours cycle time at initial stage.
Water inlet: inlet valve is opened, manual simulation's waste water is pumped into from sbr reactor device top, when reaching predetermined water level, stop into water; It is COD=400mg/L, ammonia nitrogen=80mg/L, phosphoric acid salt 1mg/L that Initial stage of culture adopts manual simulation's waste water that water inlet contamination index is set; Then the cycle is progressively improved influent COD, ammonia nitrogen, meet and cultivate denitrogenation aerobic particle mud, COD, ammonia nitrogen, concentration in periodic monitoring water outlet, when COD clearance reaches more than 90%, ammonia nitrogen removal frank reaches 90%, now improve water inlet organic loading, each COD increases 30-50mg/L, ammonia nitrogen increases 5-10mg/L, and actual increasing amount is determined according to actual water outlet situation; Till adding and reaching the upper limit, aerobic particle mud cultivate ripe after influent COD be controlled at 800mg/L, ammonia control at 200mg/L;
Aeration: sbr reactor device adopts bottom aeration, input air, air flow quantity is every 25L reactor 0.3m3/h, and the aeration rate of real reaction device can be made corresponding adjustment (expand on year-on-year basis or dwindle aeration rate according to the volume of this reactor) according to the aeration rate of this reactor (25L).Keep aeration intensity, by hydraulic shear effect, mud is screened.
Precipitation: after aeration finishes, start quiescent setting, initial stage sedimentation time is 20min, then in the cycle according to the improvement of sludge settling property, shorten gradually, be finally set to 1 minute.
Draining: after precipitation finishes, open water discharging valve, processing water is discharged to outside reactor; After steady running 30 days, in reactor, obtain aerobic particle mud.
Preferably sbr reactor device carries out aeration at Initial stage of culture by electromagnetic air pump, water inlet 5min, aeration 390min, precipitation 20min draining 5min.One-period is 420 minutes, and the quiescent setting time is along with incubation time gradient shortens.Temperature is controlled at 25 ℃, and pH is controlled at 7.0-8.0 by NaOH and the H2SO4 of 0.2mol/L.It is sodium-acetate that Initial stage of culture adopts the manual simulation influent waste water COD=400mg/L(of contamination index drug ingredient), ammonia nitrogen=70mg/L(drug ingredient is ammonium chloride), phosphoric acid salt 15mg/L(drug ingredient is potassium primary phosphate), other a large amount of element calcium of microorganism growth, iron, magnesium adopt calcium chloride, ferric sulfate and magnesium sulfate regularly to add.Sedimentation time is along with the formation of aerobic particle mud and the improvement of settling property are shortened gradually, the poor sedimentation time that arranges of inoculation of activated-sludge initial stage settling property is 20 minutes, foreshorten to gradually subsequently 1min(for avoiding mud to run off in a large number, sedimentation time should shorten gradually).
COD, ammonia nitrogen, concentration in periodic monitoring water outlet, when COD clearance reaches more than 90%, ammonia nitrogen removal frank reaches 90%, now improves water inlet organic loading, and each COD, ammonia nitrogen increase by 50,10mg/L left and right, till adding and reaching the upper limit.
Aerobic particle mud is cultivated ripe rear influent COD and is controlled at 800mg/L, ammonia control at 200mg/L.
After 12 days, when reactor sedimentation time is 10min, mud color is still isabelline, but structure is more closely knit, and it is spherical that form is tending towards; While cultivating by the 20th day, sedimentation time is 7min, now observe mud form generation significant change in reactor, mud becomes light yellow, and has the granule sludge of fine sand shape to occur, the spot of inner adularescent, median size is less, is 500 μ m, but the overwhelming majority or floc sludge, after 35 days, continue to shorten sedimentation time and strengthen the elutriation to flco mud; When sedimentation time is 3min, move after 1 week, aerobic particle mud is cultivated ripe, and outward appearance is light yellow, regular spherical, and inner adularescent spot, microscopic examination turns out to be white purification Attapulgite, and median size is 680 μ m.Sludge settling is good, SVI average out to 70.
The variation of extracellular polymeric in Granulation of Sludge, in the process constantly shortening in sedimentation time, polysaccharide in mud EPS (PS) all presents with protein (PN) trend that first declines and rise afterwards; In the time that sedimentation time is 7min, in reactor, there is aerobic particle mud; This latter stage, can think the process of granular sludge.
Purification Attapulgite carrier has more, larger duct compared with Attapulgite raw ore, can well adsorb ammonia nitrogen, can effectively improve the ammonia nitrogen removal ability of reactor, promote adhering to, depositing of nitrifier and breed growth by means of carrier surface matrix environment simultaneously, thereby formation nucleus fast culture go out just to have the aerobic particle mud of good settling property, greatly shorten incubation time, improve organic matter removal ability and nitric efficiency.
Attapulgite raw ore all contains a large amount of impurity, as montmorillonite, illite and carbonate etc., the existence of impurity affects the use properties of attapulgite hybrid, the purity that need to could improve Attapulgite through purification processes with widen its inner duct, can be better as the carrier of aerobic nitrogen removal granule sludge.
Adding of purification Attapulgite carrier can effectively be avoided causing sludge decomposition problem because of the diffusion of granule interior matrix after aerobic particle mud maturation, thus the tolerance of the stability of enhanced system and opposing poor environment, thus processed actual waste water.
Adopt the strong and applying flexible of cheap, the wide material sources of purification Attapulgite carrier, reactor engineering practicability, simple to operate, save floor occupying area, can reequip according to actual needs, there is wide promotion prospect.
This invention, for cultivation and the domestication of aerobic nitrogen removal granule sludge, reaches satisfied effect in a short time.
The present invention promotes sludge aerobic granulating based on granule sludge " nucleus hypothesis " principle utilization purification Attapulgite as induction core, same purification Attapulgite has higher purity compared with Attapulgite raw ore, thereby its specific surface area is increased, can be used as carrier for microorganism provides good living environment, utilize purification Attapulgite can shorten granular sludge time, improve volumetric loading, increase substantially mud settling property, dwindle reactor floor space; Solve the problems such as aerobic particle mud cultivation length consuming time and form are difficult to maintain, have more advantage than the cultivation of simple granule sludge, granule interior microorganism is abundant, and particle is difficult for disintegration apoptosis, and market application foreground is wide.
Accompanying drawing explanation
Embodiment
Below in conjunction with the specific embodiment of technical scheme and accompanying drawing detailed description apparatus of the present invention, but the present invention is not limited to following examples.
Utilize purification Attapulgite to cultivate a method for aerobic particle mud, equipment mainly comprises 1.SBR reactor 2. temperature regulator 3.pH determinator 4. thermostatically heating rod 5. thief hole 6. aerobic particle mud 7. purification Attapulgite 8. electromagnetic air pumps, sees Fig. 1.
Embodiment 1: adopt sbr reactor device utilization purification Attapulgite for carrier cultivation aerobic nitrogen removal granule sludge.
Attapulgite is purified: getting distilled water 500ml, is pulp density 20% according to Tu Shui than 1:10, takes recessed native original soil 50g, is added in distilled water, and rapid stirring 40min, is mixed with certain density recessed native ore pulp; Taking Sodium hexametaphosphate 99 1g is that dispersant dosage is 2% of recessed soil again, fully mix and on six stirrers, stir 2h with 500r/min speed, after dispersion agent fully acts on, to there is obvious layering stable in standing 200-30min, upper strata is the mixed solution of the recessed soil of enrichment, and lower floor is the impurity such as quartz, extract upper strata suspension to another beaker, be placed in constant temperature oven and at 105 ℃, be dried 12h, gained is and disperses the recessed soil of purifying, pack sealing; Ground 40 mesh standard sieves purification Attapulgite was screened, chose the purification Attapulgite of particle size range at 0.4-0.5mm, burnt 2h at 360 ℃, and be placed in dry encloses container and preserve, for subsequent use.Cultivate aerobic nitrogen removal granule sludge with purification Attapulgite: sbr reactor device is cylindrical, and aspect ratio is 6.5, effective volume 25L, volume exchange rate is 50%; Maintain water temperature at 25 ℃; The operation scheme of sbr reactor device is: water inlet-aeration-precipitation-draining; Be 7 hours cycle time.
The active sludge of municipal sewage plant's Aerobic Pond is packed in SBR as kind of mud, and the reactor start-up initial stage is to the disposable particle purification Attapulgite (1% of SBR effective volume, median size is 0.4-0.5mm) that adds 250 milliliters in SBR.BR reactor pH is controlled at 8.0, progressively improves influent COD, ammonia nitrogen loading cultivation aerobic nitrogen removal granule sludge.
Sbr reactor device is made up cylindrical of synthetic glass, diameter 18cm is high 110 centimetres, and useful volume 25L establishes temperature regulator, pH determinator, thermostatically heating rod, thief hole, aerobic particle mud, purification Attapulgite, electromagnetic air pump on sbr reactor device.Water port is at 60cm place, reactor middle part, and changing water ratio is 50%.Sbr reactor device carries out aeration at Initial stage of culture by electromagnetic air pump, and first cycle is 420 minutes, water inlet 5min, and aeration 390min, precipitation 20min(sedimentation time changes with sludge settling) draining 5min.Sedimentation time was decremented to 1 minute gradually from 20 minutes.The aeration rate of reactor is 0.3m3/h, keeps certain aeration intensity, by hydraulic shear effect, mud is screened.Reactor moves at 25 ℃, and temperature is controlled by thermostatically heating rod.It is sodium-acetate that Initial stage of culture adopts the manual simulation influent waste water COD=400mg/L(of contamination index drug ingredient), ammonia nitrogen=70mg/L(drug ingredient is ammonium chloride), phosphoric acid salt 10mg/L(drug ingredient is potassium primary phosphate), the macroelement calcium of microorganism growth, iron, magnesium adopt calcium chloride, ferric sulfate and magnesium sulfate regularly to add.COD, ammonia nitrogen concentration in periodic monitoring water outlet, when COD clearance reaches more than 90%, ammonia nitrogen removal frank reaches 90%, now improves water inlet organic loading, and each COD, ammonia nitrogen increase 50mg/L left and right, 10mg/L left and right, till adding and reaching the upper limit.Aerobic nitrogen removal granule sludge is cultivated ripe rear influent COD and is controlled at 800mg/L, ammonia control at 200mg/L.
After 12 days, when reactor sedimentation time is 10min, mud color is still isabelline, but structure is more closely knit, and it is spherical that form is tending towards; While cultivating by the 20th day, sedimentation time is 7min, now observe mud form generation significant change in reactor, mud becomes light yellow, and has the granule sludge of fine sand shape to occur, the spot of inner adularescent, median size is less, is 500 μ m, but the overwhelming majority or floc sludge, after 35 days, continue to shorten sedimentation time and strengthen the elutriation to flco mud; When sedimentation time is 3min, move after 1 week, aerobic particle mud is cultivated ripe, and outward appearance is light yellow, regular spherical, and inner adularescent spot, microscopic examination turns out to be white purification Attapulgite, and median size is 680 μ m.Sludge settling is good, SVI average out to 70.The ripe aerobic particle mud that adopts this kind of method to cultivate has smooth surface.
Along with the continuous shortening of sedimentation time, the poor mud of settleability is discharged reactor, and sludge concentration (MLSS and MLVSS) reduces gradually, and settleability (SVI) improves gradually.But within the operation phase of each sedimentation time, initial sludge quality concentration is lower, and along with the adaptation of active sludge to this sedimentation time, mud is realized propagation gradually, and sludge quality concentration rises to some extent, and settleability reduces simultaneously.In the time that sedimentation time is 1min, aerobic nitrogen removal granule sludge is cultivated ripe, and MLSS mass concentration is 2500mg/L, SVI average out to 70.
The present invention can shorten the culture cycle of aerobic nitrogen removal granule sludge, the most important thing is that the aerobic nitrogen removal granule sludge that utilizes purification Attapulgite to cultivate as nucleus has good stability, closely knit, be difficult for disintegrating, gave in the past and provided a new approach with the method for inert support cultivation aerobic nitrogen removal granule sludge, a poor difficult problem is solved to make stability of aerobic granular sludge, has a good application prospect.The purification Attapulgite carrier that adopts is cheap, wide material sources, reactor engineering practicability are strong and applying flexible, simple to operate, save floor occupying area, can reequip according to actual needs, has wide promotion prospect.This invention can be used for cultivation and the life-time service of aerobic nitrogen removal granule sludge, can reach satisfied effect.
Claims (4)
1. utilize purification Attapulgite carrier to cultivate a method for denitrogenation aerobic particle mud, it is characterized in that, comprise the following steps:
(1) pre-treatment: by broken block white Attapulgite original soil and pulverizing, pulverize to be placed in dry encloses container and preserve, for subsequent use;
(2) get distilled water, Attapulgite original soil is added in distilled water than 1:10-1:5 according to native water specific mass, rapid stirring 30-40min, is mixed with certain density attapulgite ore pulp; Take again Sodium hexametaphosphate 99 as dispersion agent, consumption is the 2%-4% of Attapulgite original soil quality, fully mix with (300-500) r/min speed and stir 2-3h, after dispersion agent fully acts on, to there is obvious layering stable in standing 30-40min, and upper strata is the mixed solution of enrichment Attapulgite, lower floor is the impurity such as quartz, get upper strata suspension and be placed in dry 12-18h at 105 ℃, gained is and disperses purification Attapulgite, pack sealing; Ground 40 mesh standard sieves purification Attapulgite was screened, chose the purification Attapulgite of particle size range at 0.4-0.5mm, burnt 2h at 360 ℃, and be placed in dry encloses container and preserve, for subsequent use;
(3) cultivate aerobic nitrogen removal granule sludge with step (2) purification Attapulgite: the active sludge of municipal sewage plant's Aerobic Pond is packed in SBR as kind of mud, the reactor start-up initial stage is to disposable step (2) the purification Attapulgite that adds in SBR, the Attapulgite that makes to purify accounts for 1% of SBR effective volume, then operation, SBR volume exchange rate is 50%-60%, preferably 50%; Maintain water temperature at 25 ℃; PH is at 7.0-8.0, and the operation scheme of sbr reactor device is: water inlet-aeration-precipitation-draining, carry out periodic duty.
2. according to the method for claim 1, it is characterized in that, water inlet in step (3), aeration, precipitation, draining are as follows:
Water inlet: inlet valve is opened, manual simulation's waste water is pumped into from sbr reactor device top, when reaching predetermined water level, stop into water; It is COD=400mg/L, ammonia nitrogen=80mg/L, phosphoric acid salt 1mg/L that Initial stage of culture adopts manual simulation's waste water that water inlet contamination index is set; Then the cycle is progressively improved influent COD, ammonia nitrogen, meet and cultivate denitrogenation aerobic particle mud, COD, ammonia nitrogen, concentration in periodic monitoring water outlet, when COD clearance reaches more than 90%, ammonia nitrogen removal frank reaches 90%, now improve water inlet organic loading, each COD increases 30-50mg/L, ammonia nitrogen increases 5-10mg/L, and actual increasing amount is determined according to actual water outlet situation; Till adding and reaching the upper limit, aerobic particle mud cultivate ripe after influent COD be controlled at 800mg/L, ammonia control at 200mg/L;
Aeration: sbr reactor device adopts bottom aeration, input air, air flow quantity is every 25L reactor 0.3m3/h, keeps aeration intensity, by hydraulic shear effect, mud is screened;
Precipitation: after aeration finishes, start quiescent setting, initial stage sedimentation time is 20min, then in the cycle according to the improvement of sludge settling property, shorten gradually, be finally set to 1 minute;
Draining: after precipitation finishes, open water discharging valve, processing water is discharged to outside reactor.
3. according to the method for claim 2, it is characterized in that, steady running, after 30 days, obtains aerobic particle mud in reactor.
4. according to the method for claim 2, it is characterized in that, the cycle at initial stage is 420 minutes, the 5min of wherein intaking, aeration 390min, precipitation 20min, draining 5min.
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| CN104085991A (en) * | 2014-08-01 | 2014-10-08 | 东北农业大学 | Attapulgite-stabilization pond combined reactor and low-temperature domestic sewage advanced treatment method thereof |
| CN105858873A (en) * | 2016-04-12 | 2016-08-17 | 江苏艾特克环境工程设计研究院有限公司 | Method for culturing aerobic granular sludge through high-concentration medicine wastewater |
| CN113149078A (en) * | 2021-04-07 | 2021-07-23 | 安徽文达信息工程学院 | Preparation method of attapulgite-based molybdenum disulfide composite microwave absorbent |
| CN114230075A (en) * | 2021-12-16 | 2022-03-25 | 华能辛店发电有限公司 | System and method for preparing snow-melting agent by utilizing desulfurization wastewater and application |
| CN114716003A (en) * | 2022-03-29 | 2022-07-08 | 中国化学工程第十一建设有限公司 | Preparation method of sludge micro powder, sludge micro powder and device |
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| CN104085991A (en) * | 2014-08-01 | 2014-10-08 | 东北农业大学 | Attapulgite-stabilization pond combined reactor and low-temperature domestic sewage advanced treatment method thereof |
| CN105858873A (en) * | 2016-04-12 | 2016-08-17 | 江苏艾特克环境工程设计研究院有限公司 | Method for culturing aerobic granular sludge through high-concentration medicine wastewater |
| CN105858873B (en) * | 2016-04-12 | 2019-05-10 | 江苏艾特克环境工程设计研究院有限公司 | The cultural method of high concentration pharmaceutical wastewater aerobic particle mud |
| CN113149078A (en) * | 2021-04-07 | 2021-07-23 | 安徽文达信息工程学院 | Preparation method of attapulgite-based molybdenum disulfide composite microwave absorbent |
| CN114230075A (en) * | 2021-12-16 | 2022-03-25 | 华能辛店发电有限公司 | System and method for preparing snow-melting agent by utilizing desulfurization wastewater and application |
| CN114230075B (en) * | 2021-12-16 | 2024-05-07 | 华能辛店发电有限公司 | System, method and application for preparing snow-melting agent by utilizing desulfurization wastewater |
| CN114716003A (en) * | 2022-03-29 | 2022-07-08 | 中国化学工程第十一建设有限公司 | Preparation method of sludge micro powder, sludge micro powder and device |
| CN114716003B (en) * | 2022-03-29 | 2024-01-26 | 中国化学工程第十一建设有限公司 | Preparation method of sludge micropowder, sludge micropowder and device |
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