CN103880169B - A kind of method utilizing purification Attapulgite carrier to cultivate denitrogenation aerobic particle mud - Google Patents
A kind of method utilizing purification Attapulgite carrier to cultivate denitrogenation aerobic particle mud Download PDFInfo
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Abstract
Utilize purification Attapulgite to cultivate a method for aerobic nitrogen removal granule sludge, belong to technical field of biological treatment of wastewater.By the attapulgite of pulverizing through Sodium hexametaphosphate 99 purification processes, for subsequent use; Aerobic nitrogen removal granule sludge is cultivated: load in SBR using the active sludge of municipal sewage plant's Aerobic Pond as kind of mud with purification Attapulgite, the reactor start-up initial stage is disposable in SBR adds purification Attapulgite, purification Attapulgite is made to account for 1% of SBR effective volume, volume exchange rate is 50%-60%, maintains water temperature at 25 DEG C; The operation scheme of sbr reactor device is: water inlet-aeration-precipitation-draining, carries out periodic duty.This invention is used for cultivation and the domestication of aerobic nitrogen removal granule sludge, reaches satisfied effect in a short time.
Description
Technical field
The invention belongs to technical field of biological treatment of wastewater, design and a kind ofly in sbr reactor device, add the aerobic particle mud that purification Attapulgite carrier fast culture has denitrification functions.
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 grown up on activated sludge process basis, better can overcome these problems above existed in activated sludge process, has therefore caused and has paid close attention to widely and pay attention to both at home and abroad.The advantage main manifestations of aerobic particle mud is:
(1) improve 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 then can address this problem.
(2) improve the settling property of mud
Granule sludge has good settling property, thus greatly can reduce settling tank volume or save extra settling system device.In addition, need in system to keep higher microorganism concn, and good settling property makes mud comparatively easily and liquid separation hold and stay in the reactor, thus ensure that longer sludge retention time.
(3) improve the speed of mass transfer.
The specific surface area of granule sludge is very large, is conducive to the transmission of reactor mesostroma, thus is conducive to the speed improving biological respinse.
(4) be convenient to remove aging microbial film and excess sludge in reactor
For granular mud, by the adjustment of water project situation, utilize suitable flow shear and particle collision effect, remove the aging microbial film on suspending carrier, thus ensure the operation of reactor efficient stable.
Aerobic particle mud is the particulate state microorganism polymer with spherical rule formed by microorganism self-cohesion action.Self flocculate in value-added aerobic granular process in this microorganism; numerous microorganism is wrapped in the network frame of thread fungus formation by Extracellular polymers; complementary owing to having stronger metabolism between various microorganism; thus can realize complicated organic degraded, bear the comparatively feature such as high organic loading, tolerance toxic substance.But the research at present for aerobic particle mud is confined to the experimental phase mostly, less for Practical, its concrete reason is that culture cycle is very long, particle maturation is generally about two months, and ripe particle easily disintegrates in During Process of Long-term Operation, this restriction greatly limit popularization and the industrialization of aerobic particle mud.The formation of current anaerobic grain sludge is by boot kernel, similar crystal growing process, and progressively granular academic viewpoint is reached common understanding, but the Forming Mechanism of aerobic grain still exists dispute.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 inertia organism that produce in reactor operational process.Nucleus hypothesis is the viewpoint of current Most scholars approval.
People is utilized to be 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, takes father Si Man according to found mining area its called after Palygorskite.Afterwards the Attapulgus area of Georgia, USA and the More of France rubbed grand area Fuller's earth in have also discovered this kind of mineral, and adopt 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 according to the sound in concavo-convex fort simultaneously, was translated into " attapulgite ", passed use at home in recent years.Early eighties, at area, Xuyi, Jiangsu Province, China Late Cambrian Attapulgite clay, 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, i.e. 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 diameter of rod crystalline substance is 0.01 μm of order of magnitude, and length can reach 0.1-1 μm; By the rod crystalline substance bundle of monocrystalline aggregate parallel; By the crystalline substance bundle various aggregates that mutual gathering was piled up and formed (comprising rod crystalline substance), particle diameter is generally the 0.01-0.1mm order of magnitude.Attapulgite has the plasticity-of height when moisture, 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 DEG C, and its hardness >5.Attapulgite clay has unique chain layered crystal structure, and this structure imparts the physicochemical property of the many uniquenesses of attapulgite.Mainly comprise adsorptivity, carrier-mediated, 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 directly or by after suitable surperficial purification processes for solid-carried catalyst.
Attapulgite raw ore is all containing a large amount of impurity, as montmorillonite, illite and carbonate etc., the existence of impurity affects the use properties of attapulgite hybrid, need could improve the result of use of attapulgite hybrid through purification processes and reach various application target, could be used as the solid support material of top grade.The performance improving attapulgite by purifying is one of emphasis direction of attapulgite deep processing research.Purification realizes attapulgite deep processing, and the most important condition of exploitation high added value, hi-tech and high-grade product, only has and obtain high-grade attapulgite concentrate product, just can be processed into high-quality product.Main purification techniques has dry method and wet method two kinds at present.Dry purification cost is low, technical process is comparatively simple, 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 dehydrate grinding further 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 ubiquity yield low, the problems such as production cost is high.Dispersion agent is worked in coordination with method and is jointly purified, and 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: white chunks Attapulgite original soil is broken and pulverize, pulverizes to be placed in dry encloses container and preserves, for subsequent use.
(2) get distilled water, than 1:10-1:5, Attapulgite original soil is added in distilled water according to native water specific mass, rapid stirring 30-40min, be mixed with certain density attapulgite ore pulp; Take Sodium hexametaphosphate 99 again as dispersion agent, consumption is the 2%-4% of Attapulgite original soil quality, abundant mixing stirs 2-3h with (300-500) r/min speed, after dispersion agent fully acts on, standing 30-40min is to occurring obvious layering and stablizing, and upper strata is the mixed solution of enrichment Attapulgite, lower floor is the impurity such as quartz, get upper strata suspension be placed in 105 DEG C at dry 12-18h, gained is dispersion purification Attapulgite, pack sealing; Ground 40 mesh standard sieves screen purification Attapulgite, choose the purification Attapulgite of particle size range at 0.4-0.5mm, burn 2h, be placed in dry encloses container and preserve at 360 DEG C, for subsequent use;
(3) aerobic nitrogen removal granule sludge is cultivated with step (2) purification Attapulgite: load in SBR using the active sludge of municipal sewage plant's Aerobic Pond as kind of mud, the reactor start-up initial stage is disposable in SBR adds step (2) purification Attapulgite, purification Attapulgite is made to account for 1% of SBR effective volume, then run, SBR volume exchange rate is 50%-60%, preferably 50%; Maintain water temperature at 25 DEG C; PH is at 7.0-8.0, and the operation scheme of sbr reactor device is: water inlet-aeration-precipitation-draining, carries out periodic duty; Preferred cycle time at initial stage is 7 hours.
Water inlet: opened by inlet valve, pumped into by manual simulation's waste water from sbr reactor device top, when reaching predetermined water level, stops water inlet; 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 to arrange water inlet contamination index; Then the cycle progressively improves 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; Add till reaching the upper limit, aerobic particle mud is cultivated ripe laggard water COD and is 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 actual reactor can make corresponding adjustment (volume according to this reactor expands on year-on-year basis or reduces aeration rate) according to the aeration rate of this reactor (25L).Keep aeration intensity, by hydraulic shear effect, mud is screened.
Precipitation: after aeration terminates, start quiescent setting, initial stage sedimentation time is 20min, and then the cycle interior improvement according to sludge settling property, shortens gradually, be finally set to 1 minute.
Draining: after precipitation terminates, open water discharging valve, process water is discharged to outside reactor; Steady running, after 30 days, obtains aerobic particle mud in reactor.
Preferred 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 the shortening of incubation time gradient.Temperature controls at 25 DEG C, and pH is controlled at 7.0-8.0 by NaOH and H2SO4 of 0.2mol/L.Initial stage of culture adopts manual simulation influent waste water contamination index COD=400mg/L(drug ingredient to be sodium-acetate), ammonia nitrogen=70mg/L(drug ingredient is ammonium chloride), phosphoric acid salt 15mg/L(drug ingredient is potassium primary phosphate), a large amount of other element calcium of microorganism growth, iron, magnesium adopt calcium chloride, ferric sulfate and magnesium sulfate regularly to add.Sedimentation time shortens gradually along with the formation of aerobic particle mud and the improvement of settling property, the poor sedimentation time that arranges of inoculation of activated-sludge initial stage settling property is 20 minutes, foreshorten to 1min(subsequently gradually to run off in a large number for avoiding mud, 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, about 10mg/L, add till reaching the upper limit.
Aerobic particle mud is cultivated ripe laggard water 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 form is tending towards spherical; When 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 μm, but the overwhelming majority or floc sludge, after 35 days, continue to shorten the elutriation of sedimentation time strengthening to floc sludge; When sedimentation time is 3min, after running 1 week, aerobic particle mud is cultivated ripe, and outward appearance is light yellow, regular spherical, inner adularescent spot, and microscopic examination turns out to be white purification Attapulgite, and median size is 680 μm.Sludge settling is good, SVI average out to 70.
The change of extracellular polymeric in Granulation of Sludge, in the process that sedimentation time constantly shortens, in mud EPS, polysaccharide (PS) and protein (PN) all present the trend first declining and rise afterwards; When being when precipitated 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, well can adsorb ammonia nitrogen, effectively can improve the ammonia nitrogen removal ability of reactor, simultaneously promote the attachment of nitrifier, deposition and flourish by means of carrier surface matrix environment, thus form nucleus fast culture goes out the aerobic particle mud just having good settling property, greatly shorten incubation time, improve organic matter removal ability and nitric efficiency.
Attapulgite raw ore is all containing a large amount of impurity, as montmorillonite, illite and carbonate etc., the existence of impurity affects the use properties of attapulgite hybrid, need could improve the purity of Attapulgite through purification processes and widen its internal gutter, can better as the carrier of aerobic nitrogen removal granule sludge.
Adding of purification Attapulgite carrier can effectively avoid aerobic particle mud maturation later because the diffusion of granule interior matrix causes sludge decomposition problem, thus the tolerance of the stability of enhanced system and opposing poor environment, thus processed actual waste water.
Adopted the comparatively strong and applying flexible of purification Attapulgite carrier cheap, wide material sources, reactor engineering practicability, simple to operate, save floor occupying area, can reequip according to actual needs, there is wide promotion prospect.
This invention is used for cultivation and the domestication of aerobic nitrogen removal granule sludge, reaches satisfied effect in a short time.
The present invention utilizes purification Attapulgite to promote sludge aerobic granulating as induction core based on granule sludge " nucleus hypothesis " principle, same purification Attapulgite has higher purity compared with Attapulgite raw ore, thus its specific surface area is increased, good living environment can be provided as carrier for microorganism, utilize purification Attapulgite can shorten granular sludge time, improve volumetric loading, increase substantially the settling property of mud, reduce reactor floor space; Solving aerobic particle mud cultivates consuming time longer and form is difficult to the problems such as maintenances, and have more advantage than the cultivation of simple granule sludge, granule interior microorganism is abundant, and particle not easily disintegrates apoptosis, and market application foreground is wide.
Accompanying drawing explanation
Accompanying drawing 1 is that purification Attapulgite carrier of the present invention cultivates aerobic nitrogen removal granule sludge sbr reactor device schematic diagram: 1.SBR reactor 2. temperature regulator 3.pH determinator 4. thermostatically heating rod 5. thief hole 6. aerobic particle muds 7. are purified Attapulgite 8. electromagnetic air pump.
Embodiment
Describe the specific embodiment of apparatus of the present invention in detail below in conjunction with technical scheme and accompanying drawing, but the present invention is not limited to following examples.
Utilize purification Attapulgite to cultivate the 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 muds 7. and to purify Attapulgite 8. electromagnetic air pump, sees Fig. 1.
Embodiment 1: adopt sbr reactor device to utilize purification Attapulgite for carrier cultivation aerobic nitrogen removal granule sludge.
Attapulgite is purified: get distilled water 500ml, according to Tu Shui than 1:10 and pulp density 20%, take recessed native original soil 50g, be added in distilled water, rapid stirring 40min, be mixed with certain density recessed native ore pulp; Take Sodium hexametaphosphate 99 1g again and dispersant dosage is 2% of recessed soil, abundant mixing stirs 2h with 500r/min speed on six stirrers, after dispersion agent fully acts on, standing 200-30min is to occurring obvious layering and stablizing, and upper strata is the mixed solution of the recessed soil of enrichment, and lower floor is that quartz waits impurity, extract upper strata suspension to another beaker, to be placed in constant temperature oven dry 12h at 105 DEG C, gained is dispersion and purifies recessed soil, pack sealing; Ground 40 mesh standard sieves screen purification Attapulgite, choose the purification Attapulgite of particle size range at 0.4-0.5mm, burn 2h, be placed in dry encloses container and preserve at 360 DEG C, for subsequent use.Aerobic nitrogen removal granule sludge is cultivated: sbr reactor device is cylindrical, and aspect ratio is 6.5, effective volume 25L, and volume exchange rate is 50% with purification Attapulgite; Maintain water temperature at 25 DEG C; The operation scheme of sbr reactor device is: water inlet-aeration-precipitation-draining; Cycle time is 7 hours.
Loaded in SBR as kind of mud by the active sludge of municipal sewage plant's Aerobic Pond, the reactor start-up initial stage is the disposable pastille purification Attapulgite (1% of SBR effective volume, median size is 0.4-0.5mm) adding 250 milliliters in SBR.BR reactor pH controls 8.0, progressively improves influent COD, ammonia nitrogen loading cultivates aerobic nitrogen removal granule sludge.
Sbr reactor device is made up cylindrical of synthetic glass, diameter 18cm, high 110 centimetres, useful volume 25L, sbr reactor device is established temperature regulator, pH determinator, thermostatically heating rod, thief hole, aerobic particle mud, purification Attapulgite, electromagnetic air pump.Water port is portion 60cm place in the reactor, and changing water ratio is 50%.Sbr reactor device carries out aeration at Initial stage of culture by electromagnetic air pump, and one-period is 420 minutes, water inlet 5min, aeration 390min, and 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, is screened mud by hydraulic shear effect.Reactor runs at 25 DEG C, and temperature is controlled by thermostatically heating rod.Initial stage of culture adopts manual simulation influent waste water contamination index COD=400mg/L(drug ingredient to be sodium-acetate), 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%, and now improve water inlet organic loading, each COD, ammonia nitrogen increase about 50mg/L, about 10mg/L, add till reaching the upper limit.Aerobic nitrogen removal granule sludge is cultivated ripe laggard water 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 form is tending towards spherical; When 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 μm, but the overwhelming majority or floc sludge, after 35 days, continue to shorten the elutriation of sedimentation time strengthening to floc sludge; When sedimentation time is 3min, after running 1 week, aerobic particle mud is cultivated ripe, and outward appearance is light yellow, regular spherical, inner adularescent spot, and microscopic examination turns out to be white purification Attapulgite, and median size is 680 μm.Sludge settling is good, SVI average out to 70.The ripe aerobic particle mud adopting this kind of method to cultivate has smooth surface.
Along with the continuous shortening of sedimentation time, the mud discharge reactor that settleability is poor, 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, along with active sludge is to the adaptation of this sedimentation time, mud realizes propagation gradually, and sludge quality concentration rises to some extent, and settleability reduces simultaneously.When being when precipitated 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 utilizing purification Attapulgite to cultivate as nucleus has good stability, closely knit, not easily disintegrate, provide a new approach to the method for in the past cultivating aerobic nitrogen removal granule sludge with inert support, a difficult problem for stability of aerobic granular sludge difference is solved, has a good application prospect.The purification Attapulgite carrier adopted is cheap, wide material sources, reactor engineering practicability are comparatively 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: white chunks Attapulgite original soil is broken and pulverize, pulverizes to be placed in dry encloses container and preserves, for subsequent use;
(2) get distilled water, than 1:10-1:5, Attapulgite original soil is added in distilled water according to soil and water quality, rapid stirring 30-40min, be mixed with certain density attapulgite ore pulp; Add Sodium hexametaphosphate 99 again as dispersion agent, consumption is the 2%-4% of Attapulgite original soil quality, stir 2-3h with 300-500r/min speed fully to mix, after dispersion agent fully acts on, standing 30-40min is to occurring obvious layering and stablizing, and upper strata is the mixed solution of enrichment Attapulgite, lower floor is the impurity such as quartz, get upper strata suspension be placed in 105 DEG C at dry 12-18h, gained is dispersion purification Attapulgite, pack sealing; Ground 40 mesh standard sieves screen purification Attapulgite, choose the purification Attapulgite of particle size range at 0.4-0.5mm, burn 2h, be placed in dry encloses container and preserve at 360 DEG C, for subsequent use;
(3) burn the Attapulgite after 2h by step (2) and cultivate aerobic nitrogen removal granule sludge: the active sludge of municipal sewage plant's Aerobic Pond is loaded in SBR as kind of mud, reactor start-up initial stage disposable step (2) that adds in SBR burns the Attapulgite after 2h, the Attapulgite after burning 2h is made to account for 1% of SBR effective volume, then run, SBR volume exchange rate is 50%-60%; Maintain water temperature at 25 DEG C; PH is at 7.0-8.0, and the operation scheme of sbr reactor device is: water inlet-aeration-precipitation-draining, carries 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: opened by inlet valve, pumped into by manual simulation's waste water from sbr reactor device top, when reaching predetermined water level, stops water inlet; 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 to arrange water inlet contamination index; Then influent COD, ammonia nitrogen is progressively improved by the cycle, make it 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 improves water inlet organic loading, and each COD increases 30-50mg/L, ammonia nitrogen increases 5-10mg/L, within the scope of this, actual increasing amount is determined according to actual water outlet situation; Add till reaching the upper limit, aerobic particle mud is cultivated ripe laggard water COD and is controlled at 800mg/L, ammonia control at 200mg/L;
Aeration: sbr reactor device adopts bottom aeration, and input air, air flow quantity is every 25L reactor 0.3m
3/ h, is kept aeration intensity, is screened by hydraulic shear effect to mud;
Precipitation: after aeration terminates, start quiescent setting, Initial stage of culture sedimentation time is 20min, and the cycle then, according to the improvement of sludge settling property, shortens gradually, is finally set to 1 minute;
Draining: after precipitation terminates, open water discharging valve, process 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 Initial stage of culture cycle is 420 minutes, 5min of wherein intaking, aeration 390min, precipitation 20min, draining 5min.
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| CN104085991B (en) * | 2014-08-01 | 2015-08-19 | 东北农业大学 | Utilize the method for attapulgite-stabilization pond combined reactor advanced treatment low-temperature sewage |
| 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 |
| 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 |
| 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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