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 therefor

Info

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
Application number
SE1950390A
Other languages
Swedish (sv)
Other versions
SE1950390A1 (en
Inventor
Lisa Heiberg
Original Assignee
Diapure Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Diapure Ab filed Critical Diapure Ab
Priority to SE1950390A priority Critical patent/SE543367C2/en
Priority to PCT/SE2020/050318 priority patent/WO2020204787A1/en
Publication of SE1950390A1 publication Critical patent/SE1950390A1/en
Publication of SE543367C2 publication Critical patent/SE543367C2/en
Priority to DKPA202170522A priority patent/DK181691B1/en

Links

Classifications

    • 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
    • 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
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
    • B01J20/0229—Compounds of Fe
    • 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
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0262—Compounds of O, S, Se, Te
    • 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
    • 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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

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)

17 CLAIIVIS
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).
SE1950390A 2019-03-29 2019-03-29 Method for regenerating a filter comprising a plurality of diatomite aggregates and a system therefor SE543367C2 (en)

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 DK181691B1 (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) DK181691B1 (en)
SE (1) SE543367C2 (en)
WO (1) WO2020204787A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499837A (en) * 1967-11-20 1970-03-10 Johns Manville Waste water treatment phosphate removal by iron oxide
US3984313A (en) * 1973-09-18 1976-10-05 Chemical Separations Corporation Preferential removal of ammonia and phosphates
CN1894029B (en) * 2003-12-15 2011-05-11 旭化成化学株式会社 Porous formed article and method for production thereof
JP2006341226A (en) * 2005-06-10 2006-12-21 Nippon Steel Corp How to remove phosphorus from water
HRP20160133T1 (en) * 2007-03-19 2016-03-25 Easymining Sweden Ab GETTING PHOSPHORUS
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
CN102020332A (en) * 2009-09-15 2011-04-20 深圳市金达莱环保股份有限公司 Dephosphorization method through adsorption
EP2771105A4 (en) * 2011-10-24 2015-07-08 Metamateria Technologies Llc Porous composite media for removing phosphorus from water

Also Published As

Publication number Publication date
DK181691B1 (en) 2024-09-24
DK202170522A1 (en) 2021-11-02
WO2020204787A1 (en) 2020-10-08
SE1950390A1 (en) 2020-09-30

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