SE543367C2 - Method for regenerating a filter comprising a plurality of diatomite aggregates and a system therefor - Google Patents
Method for regenerating a filter comprising a plurality of diatomite aggregates and a system thereforInfo
- Publication number
- SE543367C2 SE543367C2 SE1950390A SE1950390A SE543367C2 SE 543367 C2 SE543367 C2 SE 543367C2 SE 1950390 A SE1950390 A SE 1950390A SE 1950390 A SE1950390 A SE 1950390A SE 543367 C2 SE543367 C2 SE 543367C2
- Authority
- SE
- Sweden
- Prior art keywords
- filter
- aggregates
- solution
- diatomite
- tank
- Prior art date
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 150000001875 compounds Chemical class 0.000 claims abstract description 21
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011574 phosphorus Substances 0.000 claims abstract description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 18
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 12
- 239000010452 phosphate Substances 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 10
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims abstract description 5
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 5
- 150000002500 ions Chemical class 0.000 claims abstract description 5
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 5
- 159000000007 calcium salts Chemical class 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 claims 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- 235000011148 calcium chloride Nutrition 0.000 abstract 1
- 239000012615 aggregate Substances 0.000 description 17
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3204—Inorganic carriers, supports or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3234—Inorganic material layers
- B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3433—Regenerating or reactivating of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
-
- 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
-
- 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The disclosure relates to a method for regenerating a filter (100) comprising a plurality of diatomite aggregates (105), wherein said diatomite aggregates (105) are coated with an iron based metal oxide, the method comprising: adding (S01) a first solution comprising one or more of a first compound selected from a group consisting of: hydroxide, hydrogen carbonate and ammonia, to the filter, whereby phosphate bound to said diatomite aggregates (105) is released from said diatomite aggregates (105), transferring (S02) the first solution comprising the released phosphate from the filter to a tank (102) separate from the filter (100), adding (S03) one or more of a second compound selected from a group consisting of: CaCl2, other calcium salt, magnesium salt, and hydrocalumite, to the tank, thereby forming a mixture of the first and second solutions, wherein phosphorus is precipitated from the mixture by phosphorus binding to a positive ion of the second compound.
Description
17CLAll\/lS1. Method for regenerating a filter (100) comprising a plurality of diatomite agg regates (105), ahr-hereäa»"said-aiate-s-rëit-a"aggregatas--šfi-êëfia--ara “\ ml i 0:. J l .na 31.1. 1:29 “ an: “AA ^' Û _;_ . n» n. the method comprising: fiiterirwg (F01) »water through the filter (100) conwprisino a plurality ofdiatomite adoredates (105). wherein said diatosnšte aggregates (105) aracoated tvätt: an tron based rnetai oxide such that phosphorus containingcompounds present in the vrater bind to of the iron based metaloxide formšna phosphate isourwd to said diatomite aggregates (1053, teniøorariif~ø stopnina F02) the fiâteriswd of vxfater* throtidh the filter (100). adding (S01) a first solution comprising one or more of a firstcompound selected from a group consisting of: hydroxide, hydrogencarbonate and ammonia, to the filter, wherein said first compound is providedin such an amount in the first solution that the filter (100) and the phosphatebound to said diatomite aggregates (105) is subjected to a pH level above 9,whereby the phosphate bound to said diatomite aggregates (105) is releasedfrom said diatomite aggregates (105) into said first solution, transferring (S02) the first solution comprising the released phosphatefrom the filter to a tank (102) separate from the filter (100), adding (S03) one or more of a second compound selected from agroup consisting of: CaClz, other calcium salt, magnesium salt, andhydrocalumite, to the tank, thereby forming a mixture including the firstsolution and the second compound, wherein phosphorus is precipitated fromthe mixture by phosphorus binding to a positive ion of the second compound,and removing (S04) the precipitated phosphorus. låg. Method according to claim further comprising exchanging the filter (100) comprising the diatomite aggregates (105)after the steps of filtering (F01), temporarily stopping (F02) filtering, andregenerating (F03) have been repeated at least two times, preferably at leastthree times, more preferably at least four times. 43, The method according to any of the preceding claims, wherein atleast 75%, by weight, of the plurality of diatomite aggregates (105) have a diameter in the interval from 1 mm to 4 mm. ägt. The method according to any of the preceding claims, wherein atleast 90%, by weight, of the diatomite aggregates (105) have a specificsurface area of at least 30 m2/g, determined by BET (Ng). ä; The method according to any of the preceding claims, wherein theiron based metal coating is added by an amount such that there is about 100-3000 mmol iron per kilogram of the diatomite aggregates (105) coated withthe iron based metal coating. 19 ä, The method according to any of the preceding claims, wherein thediatomite aggregates (105) are coated with one or more layers of the ironbased metal oxide. 32. System for removing phosphorus from water, the systemcomprising:a filter (100), a tank (102) and a connection (103) arranged between orbeing configured to be connected between the filter (100) and the tank (102),the filter (100) comprising: one or more in|ets (104a, 104b) configured to receive water tobe fi|tered in the filter (100) and to receive a first solution comprising one ormore of a first compound selected from a group consisting of: hydroxide,hydrogen carbonate, and ammonia, to the filter (100), a plurality of diatomite aggregates (105) coated with an ironbased metal oxide configured to bind the phosphorus present in the water tooxygen of the iron based metal oxide forming phosphate bound to saiddiatomite aggregates, and one or more outlets (106a, 106b) configured to permit water thathas passed through the filter (100) to exit the filter (100) and to be connectedto the connection (103), wherein said first compound is provided in such an amount inthe first solution that the filter (100) and the phosphate bound to saiddiatomite aggregates (105) is subjected to a pH level above 9, whereby thephosphate bound to said diatomite aggregates (105) is released from saiddiatomite aggregates (105) into said first solution, the connection (103) between the filter (100) and the tank (102) beingconfigured to transfer the first solution comprising the released phosphatefrom the filter (100) to the tank (102), the tank (102) comprising: one or more tank in|ets (108a, 108b) being configured to receivethe first solution comprising the released phosphate and to receive one ormore of a second compound selected from a group consisting of: CaClz, other calcium salt, magnesium salt, and hydrocalumite, to the tank (102), therebyforming a mixture including the first solution and the second compound,wherein phosphorus is precipitated from the mixture by phosphorus binding to a positive ion of the second compound. tåg. The system according to claim 8, wherein the filter (100) comprisesless than 200 kg of coated diatomite aggregates (105) per householddelivering water to the filter (100).
Claims (8)
1. Method for regenerating a filter (100) comprising a plurality ofdiatomite aggregates (105), the method comprising: filtering (F01) water through the filter (100) comprising a plurality ofdiatomite aggregates (105), wherein said diatomite aggregates (105) arecoated with an iron based metal oxide such that phosphorus containingcompounds present in the water bind to sorption sites of the iron based metaloxide forming phosphate bound to said diatomite aggregates (105), temporarily stopping (F02) the filtering of water through the filter (100), adding (S01) a first solution comprising one or more of a firstcompound selected from a group consisting of: hydroxide, hydrogencarbonate and ammonia, to the filter, wherein said first compound is providedin such an amount in the first solution that the filter (100) and the phosphatebound to said diatomite aggregates (105) is subjected to a pH level above 9,whereby the phosphate bound to said diatomite aggregates (105) is releasedfrom said diatomite aggregates (105) into said first solution, transferring (S02) the first solution comprising the released phosphatefrom the filter to a tank (102) separate from the filter (100), adding (S03) one or more of a second compound selected from agroup consisting of: CaClz, other calcium salt, magnesium salt, andhydrocalumite, to the tank, thereby forming a mixture including the firstsolution and the second compound, wherein phosphorus is precipitated fromthe mixture by phosphorus binding to a positive ion of the second compound,and removing (S04) the precipitated phosphorus.
2. l\/lethod according to claim 1, further comprising exchanging the filter (100) comprising the diatomite aggregates (105)after the steps of filtering (F01), temporarily stopping (F02) filtering, andregenerating (F03) have been repeated at least two times, preferably at least three times, more preferably at least four times. 18
3. The method according to any of the preceding claims, wherein atleast 75%, by weight, of the plurality of diatomite aggregates (105) have a diameter in the interval from 1 mm to 4 mm.
4. The method according to any of the preceding claims, wherein atleast 90%, by weight, of the diatomite aggregates (105) have a specificsurface area of at least 30 m2/g, determined by BET (Ng).
5. The method according to any of the preceding claims, wherein theiron based metal coating is added by an amount such that there is about 100-3000 mmo| iron per kilogram of the diatomite aggregates (105) coated withthe iron based metal coating.
6. The method according to any of the preceding claims, wherein thediatomite aggregates (105) are coated with one or more layers of the ironbased metal oxide.
7. System for removing phosphorus from water, the systemcomprising: a filter (100), a tank (102) and a connection (103) arranged between orbeing configured to be connected between the filter (100) and the tank (102), the filter (100) comprising: one or more inlets (104a, 104b) configured to receive water tobe filtered in the filter (100) and to receive a first solution comprising one ormore of a first compound selected from a group consisting of: hydroxide,hydrogen carbonate, and ammonia, to the filter (100),a plurality of diatomite aggregates (105) coated with an iron based metal oxide configured to bind the phosphorus present in the water tooxygen of the iron based metal oxide forming phosphate bound to said diatomite aggregates, and 19 one or more outlets (106a, 106b) configured to permit water thathas passed through the filter (100) to exit the filter (100) and to be connectedto the connection (103), wherein said first compound is provided in such an amount inthe first solution that the filter (100) and the phosphate bound to saiddiatomite aggregates (105) is subjected to a pH level above 9, whereby thephosphate bound to said diatomite aggregates (105) is released from saiddiatomite aggregates (105) into said first solution, the connection (103) between the filter (100) and the tank (102) beingconfigured to transfer the first solution comprising the released phosphatefrom the filter (100) to the tank (102),the tank (102) comprising: one or more tank inlets (108a, 108b) being configured to receivethe first solution comprising the released phosphate and to receive one ormore of a second compound selected from a group consisting of: CaClz, othercalcium salt, magnesium salt, and hydrocalumite, to the tank (102), therebyforming a mixture including the first solution and the second compound,wherein phosphorus is precipitated from the mixture by phosphorus binding toa positive ion of the second compound.
8. The system according to claim 7, wherein the filter (100) comprisesless than 200 kg of coated diatomite aggregates (105) per householddelivering water to the filter (100).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1950390A SE543367C2 (en) | 2019-03-29 | 2019-03-29 | Method for regenerating a filter comprising a plurality of diatomite aggregates and a system therefor |
| PCT/SE2020/050318 WO2020204787A1 (en) | 2019-03-29 | 2020-03-27 | Method for regenerating a filter comprising a plurality of diatomite aggregates and a system therefor |
| DKPA202170522A DK202170522A1 (en) | 2019-03-29 | 2021-10-27 | Method for regenerating a filter comprising a plurality of diatomite aggregates and a system therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1950390A SE543367C2 (en) | 2019-03-29 | 2019-03-29 | Method for regenerating a filter comprising a plurality of diatomite aggregates and a system therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1950390A1 SE1950390A1 (en) | 2020-09-30 |
| SE543367C2 true SE543367C2 (en) | 2020-12-22 |
Family
ID=72667265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1950390A SE543367C2 (en) | 2019-03-29 | 2019-03-29 | Method for regenerating a filter comprising a plurality of diatomite aggregates and a system therefor |
Country Status (3)
| Country | Link |
|---|---|
| DK (1) | DK202170522A1 (en) |
| SE (1) | SE543367C2 (en) |
| WO (1) | WO2020204787A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3984313A (en) * | 1973-09-18 | 1976-10-05 | Chemical Separations Corporation | Preferential removal of ammonia and phosphates |
| JP2006341226A (en) * | 2005-06-10 | 2006-12-21 | Nippon Steel Corp | Method for removing phosphorus from water |
| US8518359B2 (en) * | 2007-03-19 | 2013-08-27 | Easymining Sweden Ab | Phosphorus recovery |
| AU2008322276A1 (en) * | 2007-11-12 | 2009-05-22 | Technion Research And Development Foundation Ltd. | Method for adsorption of phosphate contaminants from water solutions and its recovery |
| US20130098840A1 (en) * | 2011-10-24 | 2013-04-25 | Metamateria Technologies, Llc | Porous Composite Media for Removing Phosphorus from Water |
-
2019
- 2019-03-29 SE SE1950390A patent/SE543367C2/en unknown
-
2020
- 2020-03-27 WO PCT/SE2020/050318 patent/WO2020204787A1/en active Application Filing
-
2021
- 2021-10-27 DK DKPA202170522A patent/DK202170522A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE1950390A1 (en) | 2020-09-30 |
| DK202170522A1 (en) | 2021-11-02 |
| WO2020204787A1 (en) | 2020-10-08 |
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