CN1876579A - Lightweight highly effective filtering material for biology and its preparation method - Google Patents
Lightweight highly effective filtering material for biology and its preparation method Download PDFInfo
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- CN1876579A CN1876579A CNA2006100429046A CN200610042904A CN1876579A CN 1876579 A CN1876579 A CN 1876579A CN A2006100429046 A CNA2006100429046 A CN A2006100429046A CN 200610042904 A CN200610042904 A CN 200610042904A CN 1876579 A CN1876579 A CN 1876579A
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- 239000000463 material Substances 0.000 title claims abstract description 71
- 238000001914 filtration Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000012216 screening Methods 0.000 claims abstract description 7
- 238000001354 calcination Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000000706 filtrate Substances 0.000 claims description 70
- 239000002245 particle Substances 0.000 claims description 17
- 239000010881 fly ash Substances 0.000 claims description 12
- 238000013467 fragmentation Methods 0.000 claims description 12
- 238000006062 fragmentation reaction Methods 0.000 claims description 12
- 229910001710 laterite Inorganic materials 0.000 claims description 11
- 239000011504 laterite Substances 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 4
- 235000013311 vegetables Nutrition 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 239000011800 void material Substances 0.000 abstract description 2
- 238000005273 aeration Methods 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 239000010883 coal ash Substances 0.000 abstract 2
- 238000001035 drying Methods 0.000 abstract 2
- 238000002156 mixing Methods 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 33
- 230000000694 effects Effects 0.000 description 22
- 238000011010 flushing procedure Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 8
- 235000013339 cereals Nutrition 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 8
- 239000010902 straw Substances 0.000 description 8
- 241000209140 Triticum Species 0.000 description 7
- 235000021307 Triticum Nutrition 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 5
- 238000011001 backwashing Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- QGZKDVFQNNGYKY-OUBTZVSYSA-N Ammonia-15N Chemical compound [15NH3] QGZKDVFQNNGYKY-OUBTZVSYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000011020 pilot scale process Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 241000272814 Anser sp. Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Filtering Materials (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates the method of producing filtering material used in bio-aeration filter tank. The lightweight and highly effective biology filtering material comprises 65wt%-80wt% red earth ore, 10wt%-30wt% coal ash and 5wt%-15wt% pore-forming agent. The method comprises the following steps: breaking the 65wt%-80wt% red earth ore, drying at 130Deg.C-170Deg.C; fetching 10wt%-30wt% coal ash; fetching 5wt%-15wt% pore-forming agent, water content being below 3%, mixing them, adding water to form ball, drying, calcining, at 1050Deg.C-1250Deg.C, cooling, breaking, barreling and screening until the grain size being 3-8mm. The invention has the advantages of macroporous structure, rough surface, proper void ratio and large specific surface area. Every property is satisfied for the request of bio-aeration filter tank filtering material.
Description
Technical field:
The present invention relates generally to a kind of preparation method who is applicable to filtrate in the biological aerated filter and filtrate thereof.
Background technology:
Biological aerated filter is a kind of energy-efficient sewage disposal new technology, and it is good to have a treatment effect, and advantage such as hydraulic detention time is short, volume is little, floor space is few, working cost is low has obtained general use at home and abroad.
The filtrate character of the treatment effect of biological aerated filter and economy and employing has confidential relation.The filtrate of biological aerated filter has proportion less than 1 suspended filter material, generally adopts light plastic to make, as polypropylene, polyethylene etc.Costing an arm and a leg of these filtrates improved the construction investment of biological aerated filter greatly, and particularly in China, still difficulty is promoted the use of in actual engineering.What generally use at present is proportion greater than 1 stationarity filtrate, as quartz sand, coke, hard coal, other mineral material of haydite and some, wherein the performance with haydite is best, what use mostly at present is spherical sintering ceramsite filtrate, its technology is for adopting clay through batching, moulding, sinter into granular, has the intensity height, density is low, characteristics such as water-fast and chemical stability height, but the problem that exists be 1. through the agglomerating ceramic grain filter generally behind forming and sintering, the outside surface smoother, in the process of water treatment, easy to be filmed has not influenced the effect of water treatment; 2. the specific surface area of ceramic grain filter is low, and voidage is not high.
01122346.4 of the patent No. is called " a kind of strong filming filter material and production method thereof ", the production method of a kind of filtrate and filtrate thereof is disclosed, mainly with red soil and flyash as raw material, its production technique is batching, moulding, it is granular to sinter into, this filtrate is through using in the process in water treatment, the biofilm effect is undesirable, and its specific surface area and voidage are all lower after measured.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of lightweight highly effective filtering material for biology and preparation method thereof is provided.The present invention has increased the pore-forming material plant fiber powder in prescription, plant fiber powder forms micropore and has effectively increased specific surface area behind sintering, in the preparation method, roll into a ball ball earlier, behind the sintering, want broken, corner angle are removed in barreling, and screening forms, and the performance of product is between pottery and porcelain, the agglomerating haydite is irregular shape through fragmentation, and surfaceness increases greatly.Have macroporous structure, density is low, surface irregularity, effective big, the low price of real specific surface area.
Purpose of the present invention can be by realizing by the following technical solutions: a kind of lightweight highly effective filtering material for biology, include the laterite that weight part is 65%-80%, weight part is a 10%-30% flyash, and its principal feature is also to include the pore-forming material that weight part is 5%-15%.
The chemical ingredients of laterite sees Table 1:
Table 1:
| Loss on ignition (%) | SiO 2 (％) | Fe 2O 3 (％) | Al 2O 3 (％) | CaO (％) | MgO (％) | Alkali content (%) |
| 2-6 | 52-67 | 5-16 | 16-24 | 3-8 | 1-5 | 3-11 |
The chemical ingredients of flyash sees Table 2:
Table 2:
| Loss on ignition (%) | SiO 2 (％) | Fe 2O 3 (％) | Al 2O 3 (％) | CaO (％) | MgO (％) | Alkali content (%) |
| 10-32 | 30-55 | 5-18 | 8-34 | 5-17 | 2-10 | 2-7 |
The pore-forming material of described lightweight highly effective filtering material for biology is a vegetable fibre.As wheat straw, straw etc.
The filtrate grain of described lightweight highly effective filtering material for biology is the erose filtrate after the fragmentation, and its particle diameter is 3-8mm.The smooth surface of filtrate, microbial film is difficult to firm attachment, and easy to be filmed is not difficult to make the biomass that keeps high density in the filter material layer, is difficult for obtaining well stable treated effect again, so the surface of biological aerated filter filtrate should be coarse.Filter material surface out-of-shape after the fragmentation, thick poor degree is apparently higher than not broken filtrate.Its particle diameter is 3-8mm.Particle diameter is little, even particle size, and treatment effect is better, but particle diameter is too small, and head loss is big, and the blocked speed of filter material layer is fast, and back flushing is frequent.
The preparation method of described lightweight highly effective filtering material for biology, the laterite of getting weight part and be 65%-80% is crushed to powdery, dries under 130-170 ℃ of temperature; Get the flyash that weight part is 10%-30%; Get weight part and be the pore-forming material of 5%-15% and pulverize, make water content＜3% after, mix, add water and mix group's ball, go into the kiln calcining after the oven dry, temperature is 1050-1250 ℃, naturally cooling behind the kiln discharge, through fragmentation, corner angle are removed in barreling, screening, making its granularity is 3-8mm.
The preparation method of described lightweight highly effective filtering material for biology also includes the described water that adds and mixes group's ball, and its particle diameter is 8-20mm.
Chemical ingredients of the present invention sees Table 3.
Table 1 chemical composition analysis result:
| Loss on ignition (%) | SiO 2 (％) | Fe 2O 3 (％) | Al 2O 3 (％) | CaO (％) | MgO (％) | Alkali content (%) |
| 0.66 | 64.22 | 6.00 | 15.82 | 5.39 | 2.85 | 3.02 |
The contrast of the physicals of table 4 biofilter material of the present invention and commercially available spherical sintering filtrate:
| The filtrate title | Tap density (Kg/m 3) | Apparent density (Kg/m 3) | Intensity (Mpa) | Voidage (%) | * true specific surface area (m 2/g) | The perforate aperture |
| No. 1, biofilter material | 720 | 1390 | 6.1 | 47 | ||
| No. 2, biofilter material | 720 | 1440 | 4.0 | 50 | 0.9 | |
| Spherical sintering ceramsite filtrate | 1100 | 1860 | 11 | 41 | 0.2 |
Need to prove, the specific surface area of present domestic mensuration ceramic grain filter, because of limit by instrument, all need measuring institute's measured value after the filtrate fragmentation higher, the mensuration of the true specific surface area of the present invention is to adopt quick specific surface area and the test of pore analysis instrument by Institute of Analysis of Lanzhou Branch of Chinese Academy of Sciences modern chemical analysis test department, and this instrument is not measure under the situation with the filtrate fragmentation.
Every physical performance index of biofilter material of the present invention as shown in Table 4, except intensity was lower than commercially available spherical sintering ceramsite filtrate, other index all was better than spherical sintering filtrate.The intensity index of No. 2 biofilter materials is lower, but also reaches 4.0Mpa, and the filtrate intensity that is used as biological aerated filter meets the requirements fully.This biofilter material is compared with commercially available spherical sintering ceramsite filtrate, tap density be its 65.5%, apparent density is its 74.7%-77.4%, comparable its of voidage exceeds 6-9 percentage point, specific surface area is its 4.5 times, as calculated, every m
3The real total surface area of biofilter material can reach 6.48 * 10
5m
2From going back decidable in appearance, the commercially available spherical sintering filtrate of the surface ratio of this biofilter material shaggy many, and can observe filtrate and have macroporous structure.This shows that biofilter material of the present invention has good physicals.
Tap density and apparent density require apparent density greater than water for the filtrate of fixed, can be not floating in water.Putting before this, the less filtrate of density is easy to back flushing.The back flushing of biological aerated filter is significant to the steady operation in filter tank, the general air water that adopts is united recoil, requires to have certain back washing strength and time, if the intensity and the time of back flushing are not enough, can cause to produce local deposition phenomenon in the filtering layer, cause treatment effect to descend.The recoil of low density filtrate easily, the required intensity of back flushing is low, the water consumption of back flushing is few.
The mechanical property of ultimate compression strength and wear resisting property reflection filtrate.Filtrate should be under certain pressure can be broken, when back flushing, should not cause friction between filtering material particle owing to the motion of filtrate and loss.
Voidage is meant that the total void volume between filtering material particle accounts for filter material layer in the filter material layer and always piles up the volumetrical ratio, and is relevant with the shape and the grating of filtrate.In the ordinary course of things, the voidage of filter material layer is greatly good, because voidage is big, the biofilm biomass that filter material layer may be held is big, and treatment effect is good, and the chance that obstruction takes place is few, and the cycle of operation is also longer.But voidage is excessive, and biomembranous outer surface area is reduced, and also can make deleterious, generally is preferably about 50%.
Filtrate should not influence its intensity through long period of soaking in water, should have the corrosive power of certain acid-and base-resisting in sewage.
Specific surface area is meant the surface-area that unit weight (or volume) material has.The material that specific surface area is big generally all has vesicular structure, and interpenetrates in inner space.The density of haydite is little, is a kind of porous material.According to some measurement data, the specific surface area of haydite has only the some thousandths of of gac at most, and the exhausted major part in the space of visible haydite inside is sealed, and uses as sorbing material, does not have good adsorption effect.Ceramic grain filter need have bigger specific surface area and bigger aperture as the bio-carrier of biological aerated filter, just can make microorganism enter into these macropores and go, and increases biomembranous surface-area, improves treatment effect.
The invention has the beneficial effects as follows,
1. compare with present domestic widely used ceramic grain filter, have characteristics such as macroporous structure, surface irregularity, moderate, the real specific surface area of voidage be big, every performance can both satisfy as the biological aerated filter filtrate requirement, be a kind of biological aerated filter filtrate of excellent property.
2. adopt actual sewage and spherical ceramic grain filter to process the simultaneous test of effect, under identical test conditions, this biofilter material is to NH
3-N, COD, BOD
5, turbidity removal effect all be better than spherical sintering filtrate, wherein particularly to NH
3The removal effect of-N is when at identical water outlet NH
3During-N concentration, it is about 48% that the comparable commercially available spherical sintering filtrate of volumetric loading that biofilter material adopts exceeds, and be more suitable for being used for the degree of depth and remove ammonia nitrogen.Be used for defluent biological aerated filter, compare, can adopt lower backwashing strength, save the recoil water yield about 1/4 with commercially available spherical sintering ceramsite filtrate.
3. by economic balance, the comparable commercially available spherical sintering ceramsite filtrate of the price of this biofilter material reduces about 1/4.The commercially available spherical sintering filtrate of biological aerated filter employing at present, price is at 2000 yuan/m
3More than, external import to reach 4000 yuan/m
3, it is a lot of to be higher than the biological aerated filter civil engineering costs, occupies sizable ratio in the total investment expenses of biological aerated filter.
Biofilm of the present invention is easy, biological volume of holding height, and back flushing is simple, has certain intensity, water-fast and chemical stability.
Embodiment:
Most preferred embodiment shown below is described in further detail:
Embodiment 1:
It is 70% laterite that a kind of lightweight highly effective filtering material for biology has weight part, and weight part is 15% flyash, and it is that 15% wheat straw is made that weight part is arranged.The filtrate grain of lightweight highly effective filtering material for biology is the erose filtrate after the fragmentation, and its particle diameter is 3-8mm.
Its preparation method is: get weight part and be 70% laterite and be crushed to powdery, dry under 130-170 ℃ of temperature; Get weight part and be 15% flyash; Get weight part and be 15% wheat straw and pulverize, make water content＜3% after, mix, add water and mix group's ball, its particle diameter is 8-20mm.Go into the kiln calcining after the oven dry, temperature is 1050-1150 ℃, naturally cooling behind the kiln discharge, and through fragmentation, corner angle are removed in barreling, screening, making its granularity is 3-8mm.
Embodiment 2:
A kind of lightweight highly effective filtering material for biology has laterite 80% weight part, flyash 15% weight part, wheat straw 5% weight part.
Its preparation method is: get weight part and be 80% laterite and be crushed to powdery, dry under 130-170 ℃ of temperature; Get weight part and be 15% flyash; Get weight part and be 5% wheat straw and pulverize, make water content＜3% after, mix, add water and mix group's ball, its particle diameter is 8-20mm.Go into the kiln calcining after the oven dry, temperature is 1100-1200 ℃, naturally cooling behind the kiln discharge, and through fragmentation, corner angle are removed in barreling, screening, making its granularity is 3-8mm.
Embodiment 3:
A kind of lightweight highly effective filtering material for biology has laterite 70% weight part, flyash 25% weight part, wheat straw 5% weight part.
Its preparation method is: get weight part and be 70% laterite and be crushed to powdery, dry under 130-170 ℃ of temperature; Get weight part and be 25% flyash; Get weight part and be 5% wheat straw and pulverize, make water content＜3% after, mix, add water and mix group's ball, its particle diameter is 8-20mm.Go into the kiln calcining after the oven dry, temperature is 1150-1250 ℃, naturally cooling behind the kiln discharge, and through fragmentation, corner angle are removed in barreling, screening, making its granularity is 3-8mm.
Above-mentioned filtrate has carried out pilot scale in wild goose gulf, Lanzhou sewage work, adopts the former water of this factory's second pond water outlet as test usefulness, and filtrates such as biofilter material of the present invention, commercially available spherical sintering filtrate and commercially available active zeolite have been carried out the treatment effect simultaneous test.
Testing apparatus is established three covers altogether, with the pilot scale model that synthetic glass is made, loads above three kinds of filtrates of different nature respectively, and it is 40m that the water yield is handled in general design
3/ d.Model height overall 4.15m, wherein filtrate floor height 2.5m is consistent with the height of production unit.Biofilter material of the present invention is identical with the particle diameter of spherical sintering filtrate, all is 3-5mm, and the particle diameter of active zeolite is 1-3mm.Three models move simultaneously, and influent quality that can warranty test is identical, makes test-results have comparability.
Find in the test that commercially available active zeolite is to NH
3-N has very strong adsorption effect, but removes NH
3The effect of-N is very unstable, is advanced NH in the water
3The influence of-N concentration is very big, sometimes as water inlet NH
3When-N concentration is very low, suction phenomenon can occur separating, make ammonia-N removal rate negative value occur, and particle diameter is less than normal, head loss is big, and biofilm is difficult, and the price height is not suitable as the filtrate of biological aerated filter.
Under same traffic and influent ammonium concentration, the comparison of commercially available spherical sintering filtrate and biofilter material water outlet ammonia nitrogen concentration of the present invention.Filtrate of the present invention is removed the effect of ammonia nitrogen significantly better than commercially available spherical sintering filtrate.When requiring biological aerated filter water outlet ammonia nitrogen concentration to reach a certain required value, if adopt biofilter material of the present invention, the spherical sintering filtrate of the comparable employing of volumetric loading of design improves about 48%.
When influent ammonium concentration is low, the monitoring result that is provided by Gansu Province's environmental monitoring junction centre shows, the effect that biofilter material of the present invention is removed ammonia nitrogen is better than commercially available spherical sintering filtrate, ammonia-N removal rate is on average reached 94.62% and 99.07%, and corresponding commercially available spherical sintering filtrate has only 69.81% and 84.24%.Sintering filtrate water outlet ammonia nitrogen concentration of the present invention all can be lower than 0.5mg/L, and commercially available spherical sintering filtrate will make the water outlet ammonia nitrogen concentration drop to relatively difficulty of 0.5mg/L, and biofilter material of the present invention is more suitable for the degree of depth and removes ammonia nitrogen.
The monitoring result that is provided by Gansu Province's environmental monitoring junction centre shows that the effect of biofilter material removal COD of the present invention is better than commercially available spherical sintering filtrate, clearance to COD on average can reach 72.51% and 80.02%, and corresponding commercially available spherical sintering filtrate has only 65.95% and 71.76%.Under same traffic and water inlet COD concentration, the comparison of commercially available spherical sintering filtrate and biofilter material effluent COD concentration of the present invention.If disregard difficult for biological degradation COD partly in the sewage, reach same removal effect, adopt biofilter material of the present invention, the commercially available spherical sintering filtrate of the design comparable employing of volumetric loading exceeds about 26%.
The monitoring result that is provided by Gansu Province's environmental monitoring junction centre shows, under identical flow and influent turbidity, the comparison of spherical sintering filtrate and biofilter material delivery turbidity of the present invention, the turbidity average removal rate of spherical sintering filtrate is 75.3%, and the turbidity average removal rate of this biofilter material is 77.1%.
By Gansu Province's environmental monitoring junction centre commercially available spherical sintered filtrate and this biofilter material are removed BOD
5The monitoring result of effect shows this biofilter material removal BOD
5Effect on average can reach 46.70% and 88.89%, more spherical sintering filtrate 16.26% and 59.28% much better.
By the result of back flushing test as can be known, this biofilter material is compared with commercially available spherical sintering filtrate, reach same backwash effect, biofilter material of the present invention can adopt lower backwashing strength, the saving about 1/4 of the comparable spherical sintering filtrate of total water amount of back flushing, chief reason is that the volume density of biofilter material of the present invention is less, adopts lower water backwashing strength just can make filter material layer loosening.
Claims (5)
1. a lightweight highly effective filtering material for biology includes the laterite that weight part is 65%-80%, and weight part is a 10%-30% flyash, it is characterized in that also including the pore-forming material that weight part is 5%-15%.
2. lightweight highly effective filtering material for biology as claimed in claim 1 is characterized in that described pore-forming material is a vegetable fibre.
3. lightweight highly effective filtering material for biology as claimed in claim 1 or 2 is characterized in that described filtrate grain is the erose filtrate after the fragmentation, and its particle diameter is 3-8mm.
4. as the preparation method of the described lightweight highly effective filtering material for biology of claim 1 to 3, it is characterized in that:
The laterite of getting weight part and be 65%-80% is crushed to powdery, dries under 130-170 ℃ of temperature; Get the flyash that weight part is 10%-30%; Get weight part and be the pore-forming material of 5%-15% and pulverize, make water content＜3% after, mix, add water and mix group's ball, go into the kiln calcining after the oven dry, temperature is 1050-1250 ℃, naturally cooling behind the kiln discharge, through fragmentation, corner angle are removed in barreling, screening, making its granularity is 3-8mm.
5. the preparation method of lightweight highly effective filtering material for biology as claimed in claim 4 is characterized in that also including the described water that adds and mixes group's ball, and its particle diameter is 8-20mm.
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| CNB2006100429046A CN100420640C (en) | 2006-05-25 | 2006-05-25 | Lightweight highly effective filtering material for biology and its preparation method |
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| CNB2006100429046A CN100420640C (en) | 2006-05-25 | 2006-05-25 | Lightweight highly effective filtering material for biology and its preparation method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874930A (en) * | 2012-09-21 | 2013-01-16 | 中国矿业大学 | Dedicated filler for constructed wetland and preparation method for filler |
| CN103304241A (en) * | 2013-06-17 | 2013-09-18 | 华南理工大学 | Suspension ceramsite filter material for water treatment and production method thereof |
| CN105251438A (en) * | 2015-07-27 | 2016-01-20 | 王勇梅 | Fly ash-based adsorption material utilizing fiber as pore forming agent |
| CN105330022A (en) * | 2015-11-30 | 2016-02-17 | 云南兆泓环境工程有限公司 | Compound filler applied to simultaneous phosphorus and nitrogen removal of artificial wetland |
| CN105999850A (en) * | 2016-07-08 | 2016-10-12 | 吴印强 | Efficient composite carborundum filter material and preparing method and application thereof |
| CN107055639A (en) * | 2017-04-06 | 2017-08-18 | 兰州交通大学 | A kind of water stabilization material and preparation method and application method |
| CN108558368A (en) * | 2018-06-13 | 2018-09-21 | 徐州世润德环保科技有限公司 | Multiporous biological filtrate and preparation method thereof |
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| CN1006060B (en) * | 1986-10-07 | 1989-12-13 | 昆明市建筑材料科学研究所 | Superlight ceramsites and their compounding process |
| CN1303833A (en) * | 1999-12-13 | 2001-07-18 | 云南省可保煤矿 | Light ceramisite and its preparation method |
| JP3390914B2 (en) * | 2000-05-26 | 2003-03-31 | 独立行政法人産業技術総合研究所 | Ceramic composite filter for high temperature dust collection |
| CN1393276A (en) * | 2001-06-29 | 2003-01-29 | 萍乡市化工填料有限责任公司 | Strong filming filter material and its preparing process |
| CN100355671C (en) * | 2003-07-24 | 2007-12-19 | 中国地质科学院成都矿产综合利用研究所 | Novel filter material used in process of bio-aeration filter tank |
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