WO2023094656A1 - Verfahren zur entfernung von gelösten organischen substanzen in flüssigkeiten mit einem superfeinen adsorbens und mittel für die durchführung des verfahrens - Google Patents
Verfahren zur entfernung von gelösten organischen substanzen in flüssigkeiten mit einem superfeinen adsorbens und mittel für die durchführung des verfahrens Download PDFInfo
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- WO2023094656A1 WO2023094656A1 PCT/EP2022/083470 EP2022083470W WO2023094656A1 WO 2023094656 A1 WO2023094656 A1 WO 2023094656A1 EP 2022083470 W EP2022083470 W EP 2022083470W WO 2023094656 A1 WO2023094656 A1 WO 2023094656A1
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- WO
- WIPO (PCT)
- Prior art keywords
- adsorbent
- superfine
- liquid
- organic substances
- iron
- Prior art date
Links
- 239000003463 adsorbent Substances 0.000 title claims abstract description 109
- 239000007788 liquid Substances 0.000 title claims abstract description 94
- 239000000126 substance Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000000725 suspension Substances 0.000 claims description 21
- 239000000654 additive Substances 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 7
- RBTARNINKXHZNM-UHFFFAOYSA-K iron(III) chloride Substances Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- -1 aluminum iron (III) hydroxide chloride Chemical compound 0.000 claims description 3
- VLLNPWMICBZIPV-UHFFFAOYSA-E [Fe](Cl)(Cl)Cl.S(=O)(=O)([O-])[O-].[Al+3].S(=O)(=O)([O-])[O-].S(=O)(=O)([O-])[O-].[Al+3] Chemical compound [Fe](Cl)(Cl)Cl.S(=O)(=O)([O-])[O-].[Al+3].S(=O)(=O)([O-])[O-].S(=O)(=O)([O-])[O-].[Al+3] VLLNPWMICBZIPV-UHFFFAOYSA-E 0.000 claims description 2
- VDERWOBLKRZYRP-UHFFFAOYSA-H aluminum;iron(3+);trisulfate Chemical compound [Al+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VDERWOBLKRZYRP-UHFFFAOYSA-H 0.000 claims description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 2
- 235000014413 iron hydroxide Nutrition 0.000 claims description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 2
- YTURPPSYNKKPBU-UHFFFAOYSA-K sulfuric acid trichloroiron Chemical compound Cl[Fe](Cl)Cl.OS(O)(=O)=O YTURPPSYNKKPBU-UHFFFAOYSA-K 0.000 claims description 2
- 229910021577 Iron(II) chloride Inorganic materials 0.000 claims 1
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims 1
- 239000005446 dissolved organic matter Substances 0.000 claims 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 229910019142 PO4 Inorganic materials 0.000 description 6
- 235000021317 phosphate Nutrition 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 239000003139 biocide Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001722 carbon compounds Chemical class 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000002872 contrast media Substances 0.000 description 2
- 229940039231 contrast media Drugs 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- KFBFLPVVVIAINU-UHFFFAOYSA-N aluminum;hypochlorous acid Chemical compound [Al+3].ClO KFBFLPVVVIAINU-UHFFFAOYSA-N 0.000 description 1
- 150000003868 ammonium compounds Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009295 crossflow filtration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003845 household chemical Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000004848 nephelometry Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000012465 retentate Substances 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
Definitions
- the invention relates to a method for removing dissolved organic substances in liquids using a superfine adsorbent in through-flow liquid systems, in which the liquid flows from a liquid inlet to a liquid outlet.
- the invention also relates to a means for carrying out the method.
- superfine adsorbents such as superfine powdered activated carbon (short: sPAK; English: superfine powdered activated carbon, short: sPAC) for adsorption.
- WO 2020/180513 A1 discloses a method for removing contaminants from water, in particular groundwater and drinking water, which comprises the following steps:
- EP 1 146 016 A1 discloses a method for the pretreatment of organically contaminated waste water. Because the procedure
- Pre-treatment of organically polluted waste water made available which can quickly and effectively pre-treat medium to large quantities of industrial waste water, so that the pre-treated water can be fed directly into a bioreactor or to another pre-treatment process.
- the object of the invention is to create an improved method for removing (dissolved) organic substances in flow-through liquid systems with a superfine adsorbent.
- this object is achieved by a method according to the preamble with the following method steps:
- a preferred but not exclusive area of application of the method according to the invention is groundwater remediation, municipal and industrial wastewater treatment and water treatment, in particular the filtration of wastewater after chemical-biological treatment, the so-called fourth purification stage of wastewater treatment plants.
- filtration is understood to mean all methods of surface and spatial filtration, in particular cloth filtration and very particularly pile filtration.
- the method according to the invention is suitable for flow-through liquid systems in which the liquid flows from a liquid inlet to a liquid outlet.
- a measurement of the concentration of dissolved organic substances both in the liquid inlet and in the liquid outlet is useful here. This enables the creation of a self-learning or self-regulating system, since it can be ensured based on the determined empirical values regarding the concentration of dissolved organic substances in the liquid inlet and in the liquid outlet as well as the respectively added amount of superfine adsorbent that the appropriate amount of superfine adsorbent is added .
- the dosing of the superfine adsorbent is controlled and/or regulated depending on the remaining dissolved organic substances in the liquid outlet or the ratio of "dissolved organic substances in the liquid outlet" to "dissolved organic substances in the liquid inlet”.
- UV-Vis probes or TOC/DOC analyzers can be used for online measurement of the concentration of dissolved organic substances become. Due to the small particle diameter of the superfine adsorbent, a very short reaction time for removing the organic substances is achieved. Based on the concentration differences between the liquid inflow and the liquid outflow, which are recorded via an online measurement, the real-time regulation/control of the addition of the superfine adsorbent takes place, adapted to the concentration in the liquid outflow, or an effective removal. This ensures that there is always a need-based addition of super-fine adsorbent with regard to a constant removal of the dissolved organic substances.
- the superfine adsorbent is added in a dosage of 0.1 to 1000 mg/l, preferably 1 to 100 mg/l, particularly preferably 2 to 20 mg/l.
- the dosing quantity varies depending on the dissolved organic substances and the superfine adsorbent used in each case and their interaction with each other.
- the superfine adsorbent has a particle diameter dso of 0.1 to 10 ⁇ m, preferably 0.5 to 5 ⁇ m, and particularly preferably 0.8 to 3 ⁇ m.
- the large specific surface area of the superfine adsorbent leads to faster removal of the dissolved organic substances after just a few minutes ( ⁇ 1 - 10 min) compared to adsorbents with a larger particle diameter (dso > 5 - 10 pm). This also results in a lower need for adsorbent with the same removal of dissolved organic substances.
- the superfine adsorbent is in the form of a suspension, with activated carbon as the adsorbent, preferably with a concentration of less than 5 to 30% by weight, preferably from 8 to 25% by weight and particularly preferably from 10 to 15% by weight. -% is added.
- the superfine adsorbent such as activated carbon does not pose an explosion hazard.
- the superfine adsorbent such as activated carbon
- the suspension is produced in batches or continuously, on-site or off-site.
- the adsorbent is ground, for example in a ball mill.
- finely granulated ( ⁇ 500 pm) or powdered activated carbon ( ⁇ 500 pm) can be used as the starting material, with the grinding time being ⁇ 5 - 60 min to produce superfine activated carbon with a target particle diameter of dso 1 - 5 pm lies.
- Grinding takes place in a single-stage process using activated carbon ( ⁇ 500 ⁇ m) as an adsorbent.
- activated carbon ⁇ 500 ⁇ m
- granulated activated carbon is a granular product. According to agreement, at least 90% by mass is retained on a 180 ⁇ m test sieve.
- powdered activated carbon has a grain size of less than 150 ⁇ m, with a mass fraction of 95%.
- the superfine adsorbent can contain activated carbon and/or bentonite and/or zeolite and/or polymeric adsorbents and/or silica gel and mixtures thereof.
- any adsorbent that can adsorb the dissolved organic substances is suitable.
- This can be, for example, anthropogenic organic Trace substances (such as active pharmaceutical ingredients, X-ray contrast media, substances from personal care and cleaning products, biocides, flame retardants, perfluorinated chemicals) and/or organic carbon compounds.
- the raw material of the superfine adsorbent is usually in powdered and/or granulated form and consists of substances that are tailored to the dissolved organic substances or the water matrix.
- the adsorbent appropriate additives, such as metal salts (for example divalent or trivalent iron and / or aluminum salts) and / or (cationic, anionic and / or nonionic) polymers to improve the properties, such as the flow quality with regard to a separation a filter cloth included.
- metal salts for example divalent or trivalent iron and / or aluminum salts
- cationic, anionic and / or nonionic polymers to improve the properties, such as the flow quality with regard to a separation a filter cloth included.
- Such additives can be added both before and after the preparation of the suspension.
- a further development of the invention consists in the superfine adsorbent containing additives, in particular metal salts and/or polymers.
- the suspension containing the superfine adsorbent can already contain additives, such as metal salts and/or polymers, so that it can be added to the process together.
- the additives are added either directly during production of the suspension or afterwards.
- the additives can be added to the liquid separately from the superfine adsorbent.
- metal salts and/or polymers which are also added to the liquid feed for the filtration and/or to the upstream contact reactor.
- the addition can be made simultaneously with the superfine adsorbent or shortly after its addition.
- the dosing quantity of the additives must be adapted depending on the process and is usually proportional to the quantity of superfine adsorbent.
- the concentration of solids in the liquid outlet can be used as a regulation or control variable for the amount of additive.
- the superfine adsorbent is preferably added to the liquid feed.
- the liquid inlet is defined here as the area, which is before the filtration and where the liquid is treated. This can be, for example, the liquid inlet of the filtration of a sewage treatment plant.
- the reaction time for removing the organic substances corresponds to the hydraulic residence time of the process, which should be ⁇ 1 - 60 min at maximum filtration speed.
- a separate contact reactor for exposure to the superfine adsorbent prior to its removal from the liquid can be dispensed with.
- a further development of the invention is that the superfine adsorbent is removed from the liquid by cloth filtration, preferably by polstoff filtration.
- Cloth filtration processes and especially pile filtration processes have proven to be particularly effective and economical within the scope of the invention.
- a correspondingly fine filter cloth can be used.
- the method can be based on a multi-stage, in particular a two-stage filtration, with filter cloths of different fineness also being able to be used in the multi-stage filtration.
- the liquid fed to the filtration flows through the filter cloth, whereby the organic substances and other solids are retained. Due to the retention, the resistance of the cloth increases, so that it is necessary to remove the accumulated and embedded solids.
- the cleaning is level-, time-controlled or triggered manually by suction of the filter cloth.
- the filtration will not interrupted during suction of the filter cloth.
- the rinsing/process water occurring here is preferably, as mentioned above, at least partially returned to the process or returned to upstream process steps.
- a means for carrying out the process was also created which contains at least one superfine adsorbent and at least one flocculant.
- This agent is used for the treatment of liquids (such as municipal or industrial waste water, drinking water, ground water, lake, sea and river water, rainwater, mixed water and street waste water with the aim of removing dissolved organic substances, such as dissolved organic carbon : dissolved organic carbon, in short: DOC) and trace substances, or micropollutants (e.g. pharmaceuticals, industrial and household chemicals) and/or inorganic substances such as phosphates, ammonium compounds or metals.
- liquids such as municipal or industrial waste water, drinking water, ground water, lake, sea and river water, rainwater, mixed water and street waste water
- micropollutants e.g. pharmaceuticals, industrial and household chemicals
- inorganic substances such as phosphates, ammonium compounds or metals.
- the at least one adsorbent is mixed with at least one powdered or liquid flocculant after production and before it is added to the water treatment process, and the resulting agent, which contains at least one adsorbent and at least one flocculant, is used to treat the liquids.
- the agent according to the invention is metered into the liquid to be treated in an amount of 0.1 to 1,000 mg/l, preferably 1 to 100 mg/l, particularly preferably in an amount of 2 to 20 mg/l.
- the agent is preferably in the form of a suspension of adsorbent and flocculant, the concentration of adsorbent and flocculant in the suspension being between 2 and 40% by weight, preferably between 5 and 30% by weight and particularly preferably between 10 and 25% by weight .-% amounts to.
- concentration of adsorbent and flocculant in the suspension being between 2 and 40% by weight, preferably between 5 and 30% by weight and particularly preferably between 10 and 25% by weight .-% amounts to.
- the addition of a suspension of adsorbent and flocculant ensures that the addition of adsorbent and flocculant occurs at the same point and time in the process.
- the pH of the suspension is less than 4 or greater than 10, preferably less than 2.5 or greater than 11.5.
- the pH of the liquid treated with the agent is preferably in the range between 5 and 10, preferably between 6.5 and 8.5.
- the at least one adsorbent is preferably selected from the group consisting of activated carbon, bentonite, zeolite, polymeric adsorbents, silica gel, iron oxide, iron hydroxide or mixtures thereof.
- any adsorbent that can absorb the dissolved, in particular the organic, substances is suitable.
- these can be, for example, anthropogenic organic trace substances (such as active pharmaceutical ingredients, X-ray contrast media, substances from personal care and cleaning products, biocides, flame retardants, perfluorinated chemicals) and/or organic carbon compounds.
- the raw material of the adsorbent is usually in powder form (such as powdered activated carbon (PAK; English: powdered activated carbon, short: PAC) and/or superfine powdered activated carbon (sPAC) and consists of substances that are on the dissolved organic substances,
- the raw material of the adsorbent preferably consists of renewable or renewable raw materials.
- the form of the agent also enables simple and needs-based dosing, for example depending on the concentration and/or mass of the organic substances to be removed and/or the amount of water to be treated, in the process step.
- the agent enables efficient and short use before the separation process.
- sPAC to remove > 80% of organic trace substances, the necessary contact time is significantly less than 5 minutes.
- the at least one adsorbent prefferably has a particle diameter of from 0.1 to 10 ⁇ m, preferably from 0.5 to 5 ⁇ m and particularly preferably from 0.8 to 3 ⁇ m.
- a preferred embodiment of the invention is that at least two different adsorbents are contained in the agent, which preferably also have different particle diameters.
- one of the adsorbents should be superfine, the other(s) can be fine.
- the at least one flocculant is preferably selected from the group consisting of divalent or trivalent metal salts, in particular iron(III) chloride, iron(III) chloride sulfate, aluminum iron(III) chloride, aluminum iron(III) sulfate, aluminum iron(III )chloride sulfate, aluminum(III) hydroxychloride, sodium aluminate and polyaluminum chloride.
- divalent or trivalent metal salts in particular iron(III) chloride, iron(III) chloride sulfate, aluminum iron(III) chloride, aluminum iron(III) sulfate, aluminum iron(III )chloride sulfate, aluminum(III) hydroxychloride, sodium aluminate and polyaluminum chloride.
- the agent preferably contains 1 to 2,000 mg, preferably 10 to 500 mg, particularly preferably 50 to 200 mg of flocculant per 1 g of dry adsorbent mass.
- the agent can also contain additives.
- the additives can be in powder form or liquid.
- the additives are preferably selected from the group consisting of hydrochloric acid, sodium hydroxide solution and dispersants.
- additives are used to improve the separation in the process of processing the liquids and as a stabilizer or dispersant for the ingredients of the agent.
- Iron (l I l) chloride shown as flocculant.
- Each batch contains a different adsorbent to flocculant ratio.
- the table below shows six batches with different concentrations of sPAC in the suspension with different amounts of iron and the resulting pH value in each case.
- sPAC/l including the corresponding amount of flocculant (Fe 3+ /sPAC) leads to a decrease in the spectral absorption coefficient (SAK, a measure for organic substances at the wavelength of 254 nm, at the wavelengths of 436 nm and 525 nm , 620 nm for the true color) at the wavelengths 254 nm, 436 nm, 525 nm and 625 nm and the phosphorus concentration.
- SAK spectral absorption coefficient
- the decrease in the spectral absorption coefficient at wavelengths of 254 nm serves as a surrogate parameter for organic substances such as DOC and trace substances.
- the iron(III) chloride proves to be advantageous, among other things, as a flocculant of the super-fine powdered activated carbon. The lower the turbidity in the suspension, the more efficient is the agglomeration of the superfine adsorbent and its ability to be removed in subsequent separation processes.
- the adsorbent-flocculant mixture does not interfere with the removal of phosphate.
- NTU Nephelometry Turbidity Unit
- FIG. 1 shows a schematic diagram of the method according to the invention when used in a flow-through system
- a suspension is formed from a template adsorbent, which in the present case contains powdered activated carbon in the form of granulated or powdered activated carbon, and a template suspension, which in the present case contains water, the powdered activated carbon in the suspension having a concentration of less than 5 to 30% by weight, preferably from 8 to 25% by weight and particularly preferably from 10 up to 15% by weight.
- This suspension is fed to a ball mill.
- a suspension with superfine adsorbent (such as preferably powdered activated carbon) with a particle diameter of d 50 from 0.1 to 10 ⁇ m, preferably from 0.5 to 5 ⁇ m and particularly preferably from 0.8 to 3 ⁇ m, is obtained during a milling time of 5-60 min .
- the grinding preferably takes place in a single-stage process.
- the product thus produced is stored in the superfine adsorbent template.
- the concentration of dissolved organic substances in the liquid is measured and superfine adsorbent is added to the liquid to be treated according to the measured concentration of organic substances, and the superfine adsorbent with the to treated liquid mixed.
- the powdered activated carbon present in the form of a suspension is superfine adsorbent in a dosage of 1 to 1,000 mg/l, preferably 1 to 100 mg/l, particularly preferably 2 to 20 mg/l activated carbon metered into the liquid flow.
- the mixture is left for a sufficient reaction time to allow the superfine adsorbent to adsorb the dissolved organic substances in the liquid.
- the superfine adsorbent is removed from the liquid.
- the superfine adsorbent is removed from the liquid, preferably by cloth filtration, particularly preferably by polstoff filtration, with multi-stage, in particular two-stage filtration also being possible.
- the concentration of dissolved organic substances is preferably measured both in the liquid inlet and in the liquid outlet, and when a target value of dissolved organic substances in the liquid outlet is exceeded, the liquid is fed back from the liquid outlet into the liquid inlet.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
Description
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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CN202280071509.8A CN118302387A (zh) | 2021-11-29 | 2022-11-28 | 用超细吸附剂去除液体中溶解的有机物质的方法和用于实施此方法的试剂 |
KR1020247021128A KR20240116760A (ko) | 2021-11-29 | 2022-11-28 | 초미세 흡착제를 사용하여 액체 내의 용존 유기 물질을 제거하기 위한 방법 및 이 방법을 수행하기 위한 수단 |
MX2024004924A MX2024004924A (es) | 2021-11-29 | 2022-11-28 | Metodo para la eliminacion de sustancias organicas disueltas en liquidos con un adsorbente superfino y agentes para llevar a cabo el metodo. |
EP22822931.6A EP4440995A1 (de) | 2021-11-29 | 2022-11-28 | Verfahren zur entfernung von gelösten organischen substanzen in flüssigkeiten mit einem superfeinen adsorbens und mittel für die durchführung des verfahrens |
CA3237137A CA3237137A1 (en) | 2021-11-29 | 2022-11-28 | Method for removing dissolved organic substances in liquids with a superfine adsorbent and an agent for carrying out the method |
AU2022395767A AU2022395767A1 (en) | 2021-11-29 | 2022-11-28 | Method for removing dissolved organic substances in liquids using a superfine adsorbent, and means for carrying out the method |
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DE102021131310.4A DE102021131310A1 (de) | 2021-11-29 | 2021-11-29 | Verfahren zur Entfernung von gelösten organischen Substanzen in Flüssigkeiten mit einem superfeinen Adsorbens |
DE102021131310.4 | 2021-11-29 |
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EP (1) | EP4440995A1 (de) |
KR (1) | KR20240116760A (de) |
CN (1) | CN118302387A (de) |
AU (1) | AU2022395767A1 (de) |
CA (1) | CA3237137A1 (de) |
DE (1) | DE102021131310A1 (de) |
MX (1) | MX2024004924A (de) |
WO (1) | WO2023094656A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1146016A1 (de) | 2000-04-14 | 2001-10-17 | Fariwar Umwelttechnik GbR | Verfahren zur Vorbehandlung von organisch belastetem Wasser |
JP2002153866A (ja) * | 2000-11-20 | 2002-05-28 | Kurita Water Ind Ltd | ダイオキシン類含有廃水の処理方法 |
JP2004351326A (ja) * | 2003-05-29 | 2004-12-16 | Toshiba Corp | 水質監視制御システム |
JP2019162583A (ja) * | 2018-03-19 | 2019-09-26 | 東芝インフラシステムズ株式会社 | 水処理システムおよび水処理方法 |
US20190381478A1 (en) * | 2017-03-07 | 2019-12-19 | Metawater Co., Ltd. | Activated carbon slurry supply method |
WO2020180513A1 (en) | 2019-03-05 | 2020-09-10 | Aqua-Aerobic Systems, Inc. | System and method for removal of recalcitrant organic compounds from water |
Family Cites Families (1)
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US11392094B2 (en) | 2018-12-11 | 2022-07-19 | Dalian University Of Technology | Steady state and transition state multi-variable control method of a turbofan engine based on an active disturbance rejection control theory (ADRC) |
-
2021
- 2021-11-29 DE DE102021131310.4A patent/DE102021131310A1/de active Pending
-
2022
- 2022-11-28 CN CN202280071509.8A patent/CN118302387A/zh active Pending
- 2022-11-28 WO PCT/EP2022/083470 patent/WO2023094656A1/de active Application Filing
- 2022-11-28 KR KR1020247021128A patent/KR20240116760A/ko active Search and Examination
- 2022-11-28 AU AU2022395767A patent/AU2022395767A1/en active Pending
- 2022-11-28 EP EP22822931.6A patent/EP4440995A1/de active Pending
- 2022-11-28 MX MX2024004924A patent/MX2024004924A/es unknown
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1146016A1 (de) | 2000-04-14 | 2001-10-17 | Fariwar Umwelttechnik GbR | Verfahren zur Vorbehandlung von organisch belastetem Wasser |
JP2002153866A (ja) * | 2000-11-20 | 2002-05-28 | Kurita Water Ind Ltd | ダイオキシン類含有廃水の処理方法 |
JP2004351326A (ja) * | 2003-05-29 | 2004-12-16 | Toshiba Corp | 水質監視制御システム |
US20190381478A1 (en) * | 2017-03-07 | 2019-12-19 | Metawater Co., Ltd. | Activated carbon slurry supply method |
JP2019162583A (ja) * | 2018-03-19 | 2019-09-26 | 東芝インフラシステムズ株式会社 | 水処理システムおよび水処理方法 |
WO2020180513A1 (en) | 2019-03-05 | 2020-09-10 | Aqua-Aerobic Systems, Inc. | System and method for removal of recalcitrant organic compounds from water |
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MX2024004924A (es) | 2024-05-06 |
CA3237137A1 (en) | 2023-06-01 |
DE102021131310A1 (de) | 2023-06-01 |
CN118302387A (zh) | 2024-07-05 |
KR20240116760A (ko) | 2024-07-30 |
EP4440995A1 (de) | 2024-10-09 |
AU2022395767A1 (en) | 2024-04-18 |
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