GB2268173A - Filter medium - Google Patents
Filter medium Download PDFInfo
- Publication number
- GB2268173A GB2268173A GB9213932A GB9213932A GB2268173A GB 2268173 A GB2268173 A GB 2268173A GB 9213932 A GB9213932 A GB 9213932A GB 9213932 A GB9213932 A GB 9213932A GB 2268173 A GB2268173 A GB 2268173A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- medium
- composite
- solids
- filter according
- 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.)
- Withdrawn
Links
- 239000002131 composite material Substances 0.000 claims abstract description 15
- 239000010865 sewage Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 9
- 241000894006 Bacteria Species 0.000 claims abstract description 7
- 229910021536 Zeolite Inorganic materials 0.000 claims description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 8
- 239000010457 zeolite Substances 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- SQTJQTLLZVWMHN-UHFFFAOYSA-N 4-ethenylpyridine;hydrobromide Chemical compound [Br-].C=CC1=CC=[NH+]C=C1 SQTJQTLLZVWMHN-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910021529 ammonia Inorganic materials 0.000 abstract description 4
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 4
- 238000005660 chlorination reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005498 polishing Methods 0.000 abstract description 2
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000607142 Salmonella Species 0.000 description 1
- -1 ammonia ions Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Filtering Materials (AREA)
Abstract
The invention relates to a filter comprising a composite medium which can achieve, in sewage water to be treated, both solids removal and disinfection of the water being treated. This effect is particularly applicable in the tertiary treatment of sewage effluent requiring both "polishing" (solids/ammonia removal) and disinfection (bacteria removal) prior to discharge. Alternatively, a composite medium embodying the invention may be used as part of an advanced clean water treatment process where a filter comprising the medium would be situated downstream of a granular activated carbon filter, and/or possibly at the point of use. Such an application reduces the need for a residual chlorination system and operation in a sewage treatment works.
Description
FILTER MEDIUM
The invention relates to a filter medium, particularly that used in a biologically aerated filter for sewage effluent treatment.
In the past a filter medium for sewage effluent treatment comprised sand, gravel or the like in one or more layers, with or without other layers such as carbon, particularly in activated form. Such a filter medium has to be regenerated as it rapidly becomes clogged with removed particles, which is an expensive procedure, and moreover such a medium cannot generally be used to remove bacteria in any great quantity, for which expensive chlorination or other plant is often required.
It is accordingly an object of the invention to seek to mitigate these disadvantages.
According to a first aspect of the invention there is provided a filter, comprising a composite medium having constituents wherein the composite is adapted to remove at least solids and bacteria from a fluid stream.
According to a second aspect of the invention there is provided a dual role biologically aerated filter for sewage effluent treatment, comprising a filter as hereinbefore defined.
Preferably, the composite medium may comprise a zeolite coated with a synthetic resin comprising (separate) constituents. This provides a relatively rigid and dimensionally stable medium.
The zeolite may be a natural zeolite and the synthetic resin a hydrophilic synthetic resin for example a low cross-linked poly (4-vinylpyridinium bromide).
This provides a relatively simply produced composite filter medium which not only removes solids and ammonia, but also removes bacteria such as E. coli, coliforms, salmonella and faecal strepstoccocci from a liquid such as sewage effluent passing through a filter comprising the composite medium. It is believed that bacteria are removed by being adsorbed into the surface of the composite medium because of the hydrophilic nature of the medium, the solids being trapped in the medium which has a very fine porous structure.
Also, surface electrical charge or energy assists in the entrapment of solids and ammonia ions.
The composite medium preferably comprises a mass of grains, powders or particles each of which comprises a base of natural zeolite and a coating of synthetic hydrophilic resin.
A filter medium described herein embodying the invention thus, in sewage water to be treated, can achieve both solids removal and disinfection of the water being treated. This effect is particularly applicable in the tertiary treatment of sewage effluent requiring both "polishing" (solids/ammonia removal) and disinfection (bacteria removal) prior to discharge. Alternatively, a composite medium embodying the invention may be used as part of an advanced clean water treatment process where a filter comprising the medium would be situated downstream of a granular activated carbon filter, andlor possibly at the point of use. Such an application reduces the need for a residual chlorination system and operation in a sewage treatment works.
A composite medium embodying the invention would be equally applicable in a biologically aerated filter (BAF) or a flooded filter.
Claims (7)
1. A filter, comprising a composite medium having constituents wherein the composite is adapted to remove at least solids and bacteria from a fluid stream.
2. A filter according to Claim 1, the composite medium comprising a zeolite coated with a synthetic resin.
3. A filter according to Claim 2, the resin comprising separate constituents.
4. A filter according to Claim 2 or Claim 3, the zeolite comprising a natural zeolite and the synthetic resin a hydrophilic synthetic resin for example a low cross-linked poly (4-vinylpyridinium bromide).
5. A filter according to Claim 3 or Claim 4, the composite medium comprising a mass of grains, powders or particles each of which comprises a base of natural zeolite and a coating of synthetic hydrophilic resin.
6. A filter substantially as hereinbefore described.
7. A dual role biologically aerated filter for sewage effluent treatment, comprising a filter according to any preceding claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9213932A GB2268173A (en) | 1992-06-30 | 1992-06-30 | Filter medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9213932A GB2268173A (en) | 1992-06-30 | 1992-06-30 | Filter medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9213932D0 GB9213932D0 (en) | 1992-08-12 |
| GB2268173A true GB2268173A (en) | 1994-01-05 |
Family
ID=10717993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9213932A Withdrawn GB2268173A (en) | 1992-06-30 | 1992-06-30 | Filter medium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2268173A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB672626A (en) * | 1949-12-06 | 1952-05-21 | Permutit Co Ltd | Improvements relating to materials for rendering sea water potable |
| GB1043616A (en) * | 1963-03-07 | 1966-09-21 | Dow Chemical Co | Coated filter aid and improved filtration method |
| GB1140850A (en) * | 1965-02-01 | 1969-01-22 | Fram Corp | Filter element |
| GB1163426A (en) * | 1965-09-28 | 1969-09-04 | Kata Mfg And Filtering Co | Fluid Purification Device and method of producing same |
| GB1373388A (en) * | 1970-12-24 | 1974-11-13 | Teijin Ltd | Thermoplastic polymer fibres |
| GB1527753A (en) * | 1974-09-26 | 1978-10-11 | Mitsubishi Rayon Co | Method of manufacturing adsorbent materials and their use in waste water purification |
| GB1577930A (en) * | 1975-12-24 | 1980-10-29 | Commw Scient Ind Res Org | Adsorbent materials for the separation of organic substances from solution |
| GB2056429A (en) * | 1979-08-16 | 1981-03-18 | Takeda Chemical Industries Ltd | Ion adsorbent |
| EP0069435A1 (en) * | 1981-06-19 | 1983-01-12 | Mitsubishi Rayon Co., Ltd. | Cationic polymeric material for treating water, preparation and utilisation thereof |
| GB2163065A (en) * | 1984-08-13 | 1986-02-19 | Pall Corp | Sorbing apparatus |
| WO1988009770A1 (en) * | 1987-06-09 | 1988-12-15 | Erich Busch | Self-contained filter unit |
-
1992
- 1992-06-30 GB GB9213932A patent/GB2268173A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB672626A (en) * | 1949-12-06 | 1952-05-21 | Permutit Co Ltd | Improvements relating to materials for rendering sea water potable |
| GB1043616A (en) * | 1963-03-07 | 1966-09-21 | Dow Chemical Co | Coated filter aid and improved filtration method |
| GB1140850A (en) * | 1965-02-01 | 1969-01-22 | Fram Corp | Filter element |
| GB1163426A (en) * | 1965-09-28 | 1969-09-04 | Kata Mfg And Filtering Co | Fluid Purification Device and method of producing same |
| GB1373388A (en) * | 1970-12-24 | 1974-11-13 | Teijin Ltd | Thermoplastic polymer fibres |
| GB1527753A (en) * | 1974-09-26 | 1978-10-11 | Mitsubishi Rayon Co | Method of manufacturing adsorbent materials and their use in waste water purification |
| GB1577930A (en) * | 1975-12-24 | 1980-10-29 | Commw Scient Ind Res Org | Adsorbent materials for the separation of organic substances from solution |
| GB2056429A (en) * | 1979-08-16 | 1981-03-18 | Takeda Chemical Industries Ltd | Ion adsorbent |
| EP0069435A1 (en) * | 1981-06-19 | 1983-01-12 | Mitsubishi Rayon Co., Ltd. | Cationic polymeric material for treating water, preparation and utilisation thereof |
| GB2163065A (en) * | 1984-08-13 | 1986-02-19 | Pall Corp | Sorbing apparatus |
| WO1988009770A1 (en) * | 1987-06-09 | 1988-12-15 | Erich Busch | Self-contained filter unit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9213932D0 (en) | 1992-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3932278A (en) | Filter cleaning method | |
| US4430226A (en) | Method and apparatus for producing ultrapure water | |
| CA1169234A (en) | Filter media, method for oxidizing and removing soluble iron, method for removing and inactivating microorganisms and particulate filter aid | |
| US3767570A (en) | Granular to powdered activated carbon in polluted water purification process | |
| US6599428B1 (en) | Filter system for removing contaminants from water and method thereof | |
| JPS6171892A (en) | Purification of water by three-phase fluidized bed | |
| JPH0665369B2 (en) | Air purifier | |
| US20060182944A1 (en) | Flexible reticulated foam fluid treatment media and method of preparation | |
| GB2268173A (en) | Filter medium | |
| US3401114A (en) | Process using coal in sewage treatment | |
| Visvanathan et al. | Treatment of landfill leachate by crossflow microfiltration and ozonation | |
| GB2413124A (en) | Glass filtration media | |
| JP3461514B2 (en) | Advanced water treatment system and method of starting advanced water treatment system | |
| JP2906257B2 (en) | Biological contact filtration device | |
| JPH0221315B2 (en) | ||
| JPH08267053A (en) | Method of removing arsenic by electrolytic manganese dioxide adsorbent and arsenic removing adsorbent | |
| JP3024683B2 (en) | Wastewater treatment equipment | |
| JP3173709B2 (en) | Seawater pretreatment method for seawater desalination by reverse osmosis method | |
| JPH0675712B2 (en) | Purification method of organic wastewater | |
| JP2929910B2 (en) | Method for treating phosphorus-containing water | |
| KR100405268B1 (en) | The contactive filter for purification of the polluted water and waste water | |
| Weber Jr et al. | Removal of Organic Substances from Municipal Wastewaters by Physicochemical Processes | |
| JPH07124555A (en) | Water purifying and activating method and apparatus | |
| Yuanjin et al. | A new biological treatment of industrial wastewater and municipal sewage- biological contact aeration | |
| KR980008284A (en) | Drinking water purifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |