CN103922484A - Filter material of biofilter and preparation method thereof - Google Patents
Filter material of biofilter and preparation method thereof Download PDFInfo
- Publication number
- CN103922484A CN103922484A CN201410134540.9A CN201410134540A CN103922484A CN 103922484 A CN103922484 A CN 103922484A CN 201410134540 A CN201410134540 A CN 201410134540A CN 103922484 A CN103922484 A CN 103922484A
- Authority
- CN
- China
- Prior art keywords
- filter material
- filter
- filtrate
- mix
- biofilter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention belongs to the field of water treatment and particularly relates to a filter material of a biofilter and a preparation method thereof. The filter material is spherical, wherein the grain size is 1.5-2.5mm and the specific gravity is greater than 4.0. The filter material mainly comprises coal ash, iron ore power, clay, bentonite and the like which are calcined at high temperatures. The filter material is used for the biofilter. Compared with common quartz filter materials, hardening of the filtering layer can be alleviated, and the filter precision and efficiency can be improved.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to a kind of filter material for biological filter and preparation method thereof.
Background technology
Biological filter is all can use in the advanced treatment of current a lot of sewage, because its technique is simple, processing efficiency is high, floor space is little, organic volumetric loading is large, the residence time is short, union biological degradation and hold back suspended solids in one, save second pond, having that less investment, energy consumption are low, effluent quality advantages of higher, is a kind of advanced technologies in biomembrance process.Microbial film is made up of bacterium, fungi, algae, protozoon, metazoan etc.When effluent stream is during through filter bed, some pollutent and bacterial adhesion are at filter material surface, and microorganism, just at filter material surface amount reproduction, forms one deck microbial film.Organic pollutant in sewage is degraded through microbial metabolism, the continuous breeding of microorganism simultaneously, microbial film progressive additive, in the time exceeding certain thickness, internal layer microorganism enters endogenous metabolism because can not get sufficient nutriment, split away off with water and flow out filter tank from filtrate, filter material surface grows new microbial film more again.The physical and chemical performance of filter material surface affects microbial growth, breeds, comes off and form, and filtrate itself is also adsorbable and hold back the suspended substance in sewage.Therefore, high-performance biofilter material is the key of biological filter.
Biological filter is all can use in the advanced treatment of current a lot of sewage, because its technique is simple, processing efficiency is high, floor space is little, organic volumetric loading is large, the residence time is short, union biological degradation and hold back suspended solids in one, save second pond, having that less investment, energy consumption are low, effluent quality advantages of higher, is a kind of advanced technologies in biomembrance process.Microbial film is made up of bacterium, fungi, algae, protozoon, metazoan etc.When effluent stream is during through filter bed, some pollutent and bacterial adhesion are at filter material surface, and microorganism, just at filter material surface amount reproduction, forms one deck microbial film.Organic pollutant in sewage is degraded through microbial metabolism, the continuous breeding of microorganism simultaneously, microbial film progressive additive, in the time exceeding certain thickness, internal layer microorganism enters endogenous metabolism because can not get sufficient nutriment, split away off with water and flow out filter tank from filtrate, filter material surface grows new microbial film more again.The physical and chemical performance of filter material surface affects microbial growth, breeds, comes off and form, and filtrate itself is also adsorbable and hold back the suspended substance in sewage.
High-performance biofilter material be the key of biological filter.Conventional filtrate has organic polymer filtrate and inorganic filtrate.Organic polymer filtrate has polystyrene, polyvinyl chloride, polypropylene etc., and the consistency that they and microorganism are asked is poor, and when biofilm, biomass is few, easily comes off, and treatment effect is not so good, and expensive, and in biofiltration technique, application is few.Inorganic filtrate mainly contains quartz sand, volcanics, gac, hard coal, zeolite, Water Quenching Slag, shell etc.
The factor that affects media performance mainly contains the following aspects:
(1) specific surface area
The specific surface area porosity larger, that form of filtrate is higher, is more conducive to biofilm, and can plays shielding protection to the bacterium having adhered to, and makes it avoid the souring of hydraulic shear.The specific surface area of filtrate is relevant with particle diameter, and the particle diameter of filter medium that advanced treatment of wastewater is suitable is 3～6 mm, and particle diameter is too little is not suitable with high hydraulic load, is unfavorable for again too greatly the removal of denitrogenation and SS.
(2) filter material surface is electrical
Microorganism surface, generally with negative charge, therefore requires filter material surface positively charged, and this is conducive to microorganism adhering to and fixed growth at filter material surface
(3) physical strength
It is high that filtrate physical strength is wanted, in order to avoid in backwash process, filtrate asks that wearing and tearing or fragmentation cause particle to diminish, and can bear certain pressure, to reduce the load of supporting structure.
(4) chemistry and biologically stable
Filtrate must have erosion resistance, and does not participate in biomembranous biochemical reaction, in order to avoid affect water quality because filtrate is water-soluble in operational process, or makes the material of filtrate morph to disintegrate because adding treatment agent.
In actual production operational process, can there is caking phenomenon because of the growth of microbial film in the filtrate of a lot of biological filters, this is normally excessive due to contact surface between filtrate, and filtrate kicks the beam and causes.Particle diameter of filter medium and density are less, and biomass is more, and filtrate more easily lumps; On the contrary, particle diameter of filter medium and density are larger, and biomass is fewer, and filtrate is got over prevented from caking.
Summary of the invention
The object of the invention is to provide a kind of filter material for biological filter and preparation method thereof, and compared with conventional quartz sand filter media, biomass is more, and is not easy caking.
The filter material for biological filter that the present invention proposes, described filtrate carries out mixed sintering by flyash, iron ore powder, clay, wilkinite by 17%, 60%, 20%, 3% mass ratio and forms, and the proportion of filtrate is greater than 4.0, and particle diameter is 1.5 ~ 2.5mm.
In the present invention, being shaped as of filtrate is spherical, and particle diameter is 1.5 ~ 2.5mm, median size 2.0mm, and the quartz sand filter media particle diameter of general biological filter is generally 3mm, the therefore filtrate of same volume, theoretically, the specific surface area of this filtrate than quartz sand filter media large 7 times.
The preparation method of the filter material for biological filter that the present invention proposes, concrete steps are as follows:
(1) flyash, iron level are greater than 60% iron ore powder, clay and wilkinite in mass ratio the ratio of example 17%, 60%, 20%, 3% mix;
(2) mix 10% ~ 20% water and mix, utilize nodulizer, make the spheroidal particle of 1.5 ~ 2.5mm diameter;
(3) spheroidal particle step (2) being made is dry 12 ~ 24h first at room temperature, then puts into the dry 2 ~ 4h of 70 DEG C of bakers;
(3) high-temperature roasting in sinter machine, temperature is controlled at 1200 DEG C, and the time is 45min;
(4) haydite after roasting is carried out to cooling rear screening, particle size range is controlled at 1.5 ~ 2.5mm, and proportion is greater than 4.0.
Beneficial effect of the present invention:
Its filtrate thickness of traditional denitrification deep-bed filter is generally 2.0 ~ 2.5m, after adopting this filtrate, not affecting under the prerequisite of effluent quality, can reduce by 15% thickness of filter bed.
Embodiment
Further illustrate the present invention below by embodiment.
embodiment 1
Prepare filtrate:
(1) flyash, iron level are greater than 60% iron ore powder, clay and wilkinite in mass ratio the ratio of example 17%, 60%, 20%, 3% mix;
(2) mix 10% ~ 20% water and mix, utilize nodulizer, make the spheroidal particle of 1.5 ~ 2.5mm diameter;
(3) spheroidal particle step (2) being made is dry 12 ~ 24h first at room temperature, then puts into the dry 2 ~ 4h of 70 DEG C of bakers;
(3) high-temperature roasting in sinter machine, temperature is controlled at 1200 DEG C, and the time is 45min;
(4) haydite after roasting is carried out to cooling rear screening, particle size range is controlled at 1.5 ~ 2.5mm, and proportion is greater than 4.0.
By the above-mentioned filter material for biological filter of making for the treatment of municipal wastewater; certain BAF thickness of filter bed 1m; for the treatment of municipal wastewater secondary effluent; in operational process, often there will be filtrate to harden, adopt after this filtrate, thickness of filter bed is constant; water outlet COD reduces by 5%; water outlet SS reduces by 30%, and the thing phenomenon that hardens occurs, but backwashing period has shortened 30%.
Claims (2)
1. a filter material for biological filter, is characterized in that: described filtrate carries out mixed sintering by flyash, iron ore powder, clay, wilkinite by 17%, 60%, 20%, 3% mass ratio and forms, and the proportion of filtrate is greater than 4.0, and particle diameter is 1.5 ~ 2.5mm.
2. a preparation method for a kind of filter material for biological filter as claimed in claim 1, is characterized in that concrete steps are as follows:
(1) flyash, iron level are greater than 60% iron ore powder, clay and wilkinite in mass ratio the ratio of example 17%, 60%, 20%, 3% mix;
(2) mix 10% ~ 20% water and mix, utilize nodulizer, make the spheroidal particle of 1.5 ~ 2.5mm diameter;
(3) spheroidal particle step (2) being made is dry 12 ~ 24h first at room temperature, then puts into the dry 2 ~ 4h of 70 DEG C of bakers;
(3) high-temperature roasting in sinter machine, temperature is controlled at 1200 DEG C, and the time is 45min;
(4) haydite after roasting is carried out to cooling rear screening, particle size range is controlled at 1.5 ~ 2.5mm, and proportion is greater than 4.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134540.9A CN103922484A (en) | 2014-04-04 | 2014-04-04 | Filter material of biofilter and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134540.9A CN103922484A (en) | 2014-04-04 | 2014-04-04 | Filter material of biofilter and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103922484A true CN103922484A (en) | 2014-07-16 |
Family
ID=51140918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410134540.9A Pending CN103922484A (en) | 2014-04-04 | 2014-04-04 | Filter material of biofilter and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103922484A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759149A (en) * | 2015-03-18 | 2015-07-08 | 蚌埠德美过滤技术有限公司 | High-activity composite filter material prepared by blending melt-blown polypropylene with modified kaolin and used for sewage treatment and preparation method thereof |
| CN106512929A (en) * | 2016-09-27 | 2017-03-22 | 王勇梅 | Embedded zero-valent iron porous adsorption reaction material |
| 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 |
| CN109289321A (en) * | 2018-12-05 | 2019-02-01 | 大连海洋大学 | It is a kind of using waste shell as new bio filtrate of raw material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004261808A (en) * | 2004-04-27 | 2004-09-24 | Matsushita Electric Ind Co Ltd | Biofilter device |
| CN101456620A (en) * | 2009-01-05 | 2009-06-17 | 北京大学 | Multi-medium rapid infiltration sewage disposal device and method thereof |
| CN102211807A (en) * | 2011-05-04 | 2011-10-12 | 南京工业大学 | High-density porous support for treating wastewater of biological fluidized bed and preparation method thereof |
| CN102584177A (en) * | 2012-02-16 | 2012-07-18 | 环境保护部华南环境科学研究所 | Phosphorous-removing lytag as well as preparation method and application thereof |
-
2014
- 2014-04-04 CN CN201410134540.9A patent/CN103922484A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004261808A (en) * | 2004-04-27 | 2004-09-24 | Matsushita Electric Ind Co Ltd | Biofilter device |
| CN101456620A (en) * | 2009-01-05 | 2009-06-17 | 北京大学 | Multi-medium rapid infiltration sewage disposal device and method thereof |
| CN102211807A (en) * | 2011-05-04 | 2011-10-12 | 南京工业大学 | High-density porous support for treating wastewater of biological fluidized bed and preparation method thereof |
| CN102584177A (en) * | 2012-02-16 | 2012-07-18 | 环境保护部华南环境科学研究所 | Phosphorous-removing lytag as well as preparation method and application thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759149A (en) * | 2015-03-18 | 2015-07-08 | 蚌埠德美过滤技术有限公司 | High-activity composite filter material prepared by blending melt-blown polypropylene with modified kaolin and used for sewage treatment and preparation method thereof |
| CN106512929A (en) * | 2016-09-27 | 2017-03-22 | 王勇梅 | Embedded zero-valent iron porous adsorption reaction material |
| 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 |
| CN109289321A (en) * | 2018-12-05 | 2019-02-01 | 大连海洋大学 | It is a kind of using waste shell as new bio filtrate of raw material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102531157B (en) | Biological aerated filter packing and preparation method thereof | |
| CN104828928A (en) | Preparation method of filtering material of nitrogen and phosphorus removal bio-filter tank | |
| JP2007268511A (en) | Iron ion eluting body | |
| CN103922484A (en) | Filter material of biofilter and preparation method thereof | |
| CN101597105B (en) | Preparation method for magnetic carrier in processing technique of sewage biological fluidized bed | |
| CN103172165A (en) | Suspended ceramic biological aerated pool and method for treating raw water by applying suspended ceramsite biological aerated pool | |
| CN110228911B (en) | Multistage tandem type autotrophic-heterotrophic denitrification coupling nitrogen and phosphorus removal method and device | |
| CN101648745A (en) | Magnetic seed filler taking sludge as main raw material and preparation method thereof | |
| CN102603359B (en) | Coal ash biological filter material and preparation method thereof | |
| CN102259974B (en) | Magnetite-zeolite magnetic biological carrier material, as well as preparation method and application method thereof | |
| CN101293768A (en) | Biological filter material and preparation method | |
| CN103951044B (en) | A kind of non-sintered rapid biofilm biologic packing material and preparation method thereof | |
| CN101759281B (en) | Double-layer compound biological filter material for aerated biological filter and method for preparing same | |
| CN103304241A (en) | Suspension ceramsite filter material for water treatment and production method thereof | |
| CN103382098B (en) | Light biological carrier for water treatment, and preparation method and application of light biological carrier | |
| Wang et al. | Formation mechanisms and assembly patterns of anammox biofilm induced by carrier type: Novel insights based on low-strength wastewater treatment | |
| CN102874922A (en) | Suspension biological activated carbon particle vector and preparation method thereof | |
| CN105621606A (en) | Novel denitrification biological filter with light filtering material | |
| CN100355671C (en) | Novel filter material used in process of bio-aeration filter tank | |
| CN103539255B (en) | Suspension haydite-active carbon double layer filter and apply it and process the method for former water | |
| Yang et al. | Development of an advanced biological treatment system applied to the removal of nitrogen and phosphorus using the sludge ceramics | |
| Bao et al. | Performance and characterization of a non-sintered zeolite porous filter for the simultaneous removal of nitrogen and phosphorus in a biological aerated filter (BAF) | |
| CN203513353U (en) | Suspended ceramic aggregate biological aerated filter | |
| JP2004351306A (en) | Water cleaning material effectively utilizing shell of foulings | |
| EP3024319B1 (en) | New hybrid biodegradable polymer for efficient nitrogen and phosphate reduction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140716 |