DE19515828A1 - Integrated filter and photocatalysis device for removing contaminants from liquids - Google Patents
Integrated filter and photocatalysis device for removing contaminants from liquidsInfo
- Publication number
- DE19515828A1 DE19515828A1 DE1995115828 DE19515828A DE19515828A1 DE 19515828 A1 DE19515828 A1 DE 19515828A1 DE 1995115828 DE1995115828 DE 1995115828 DE 19515828 A DE19515828 A DE 19515828A DE 19515828 A1 DE19515828 A1 DE 19515828A1
- Authority
- DE
- Germany
- Prior art keywords
- tubes
- membrane
- discharge tubes
- radiation
- photocatalytic
- 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- Withdrawn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
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 title claims abstract description 10
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 4
- 239000000356 contaminant Substances 0.000 title 1
- 230000005855 radiation Effects 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000000706 filtrate Substances 0.000 claims abstract description 4
- 238000009295 crossflow filtration Methods 0.000 claims abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000003344 environmental pollutant Substances 0.000 claims description 5
- 231100000719 pollutant Toxicity 0.000 claims description 5
- 239000012465 retentate Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims 1
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- 239000010935 stainless steel Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 239000000758 substrate Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011941 photocatalyst Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000000191 radiation effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241000219289 Silene Species 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/14—Dynamic membranes
- B01D69/141—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0041—Inorganic membrane manufacture by agglomeration of particles in the dry state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0041—Inorganic membrane manufacture by agglomeration of particles in the dry state
- B01D67/00411—Inorganic membrane manufacture by agglomeration of particles in the dry state by sintering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/123—Ultraviolet light
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2475—Membrane reactors
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/10—Catalysts being present on the surface of the membrane or in the pores
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3228—Units having reflectors, e.g. coatings, baffles, plates, mirrors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Catalysts (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Behandlung schadstoffhaltiger Flüssigkeiten durch möglichst vollkommenen, oxidativen Abbau von Schadstoffen in solchen bereits vor gereinigten Flüssigkeiten, beispielsweise in Deponieabwässern.The invention relates to a device for the treatment of pollutant-containing liquids through as complete as possible oxidative degradation of pollutants in such cleaned liquids, for example in landfill waste water.
Als physikalisch, chemisch und auch biologisch wirkende Behandlungsmöglichkeiten sind in diesem Zusammenhang prinzipiell, auch in unterschiedlichen Kombinationen und größtenteils zugleich unter Ausnutzung der keimabtötenden Wirkung, bekannt:As physically, chemically and also biologically active treatment options are in this context in principle, also in different combinations and for the most part at the same time using the germicidal effect, known:
- - Ozon, Wasserstoffperoxid- ozone, hydrogen peroxide
- - ultraviolette (UV) Strahlung und- ultraviolet (UV) radiation and
- - photokatalytisch beschleunigte Oxidationsvorgänge.- Photocatalytically accelerated oxidation processes.
Bei der UV-Strahlung muß beim vorliegenden Anwendungszweck nach dem Wirkprinzip zwischen "harter" (kurzwelliger) und "weicher" (langwelliger, vorzugsweise mit einer Wel lenlänge um 250 nm) UV-Strahlung unterschieden werden. Die erstere bewirkt vor allem die Bildung von Ozon und dieses hat dann entkeimende und aggressiv oxidierende (auch im Hinblick auf die Ausrüstungen) Wirkung, aber wegen des teilweisen "Umweges" über die Ozonbildung eine schlechteren energetischen Gesamtwirkungsgrad. Die letztere ist bei be stimmten Photokatalysatoren aus halbleiterphysikalischen Gründen besonders wirkungsvoll.In the case of the present application, UV radiation must work according to the active principle between "hard" (short-wave) and "softer" (long-wave, preferably with a wel length around 250 nm) UV radiation. The former primarily does that Formation of ozone and this then has sterilizing and aggressively oxidizing (also in With regard to the equipment) effect, but because of the partial "detour" via the Ozone formation is a poorer overall energy efficiency. The latter is with be voted photocatalysts particularly effective for semiconductor-physical reasons.
Verfahrens- und vorrichtungsmäßig wurden beispielsweise realisiert:
UV-Bestrahlung vorgereinigter Abwässer mit oder ohne Anwesenheit photokatalytisch wirk
samer Stoffe, wobei die Strahlungseinwirkung durch Verwirbelung (Turbulenz) (DE 40 25
078), durch laminares Fließen in dünner Schicht (DE 40 00 369) oder durch kaskadenartiges
Vorbeileiten an der Strahlungsquelle (Zeitschrift "TerraTech" Nr. 2 (1995), S. 55-56) inten
siviert werden soll. Meist werden noch Oxidationsmittel, wie Ozon (mit den oben erwähnten
Nachteilen) oder Wasserstoffperoxid zugesetzt. Bei diesen technischen Lösungen sind die
ungleichmäßige, nur in der Summe steuerbare Strahlungseinwirkung auf die anfallende Was
sermenge sowie ggf. der Beschaffungs- und Steuerungsaufwand für die zugesetzten Chemi
kalien von Nachteil.In terms of process and device, for example:
UV irradiation of pre-cleaned wastewater with or without the presence of photocatalytically active substances, the radiation effect being caused by turbulence (DE 40 25 078), by laminar flow in a thin layer (DE 40 00 369) or by cascading past the radiation source (magazine "TerraTech" No. 2 (1995), pp. 55-56) should be intensified. Oxidizing agents such as ozone (with the disadvantages mentioned above) or hydrogen peroxide are usually added. With these technical solutions, the uneven radiation effect, which can only be controlled in total, on the amount of water that is produced, as well as the procurement and control expenditure for the added chemicals, are disadvantageous.
Möglicherweise hinsichtlich der Ausnutzung der Lichtenergie, beispielsweise auch des Son nenlichtes, vorteilhaft, aber in der Praxis wegen des erforderlichen Zentrifugier- und Fil trieraufwandes sehr problematisch, sind Verfahren zur photokatalytischen Abwasserbehand lung mit suspendiertem, feinteiligem Katalysator, beispielsweise aus TiO₂ (Faltblatt der TU Clausthal, Institut für Thermische Verfahrenstechnik in Verbindung mit dem Institut für So larenenergieforschung GmbH, Hannover "Photokatalytische Abwasserbehandlung"). Derar tige Suspensionsverfahren sind auch mit feinteiligen Katalysatoren bekanntgeworden, deren katalytisch wirksame Bestandteile Metalle der Platingruppe oder deren Oxide sind (US 4.863.608). Hier kommt das Problem hinzu, daß eine Wertstoff-Rückgewinnung um beinahe jeden Preis erforderlich ist.Possibly with regard to the use of light energy, for example also the son nenlichtes, advantageous, but in practice because of the required centrifugation and Fil Trier effort very problematic, are methods for photocatalytic wastewater treatment with suspended, fine-particle catalyst, for example made of TiO₂ (leaflet of the TU Clausthal, Institute for Thermal Process Engineering in connection with the Institute for So larenenergieforschung GmbH, Hanover "Photocatalytic waste water treatment"). Derar term suspension processes have also become known with fine-particle catalysts, the catalytically active constituents are metals of the platinum group or their oxides (US 4,863,608). Here there is the additional problem that recycling of valuable materials is almost any price is required.
Weiterhin ist es bekannt, oxidische Photokatalysatoren aus einer Suspension auf einem Trä ger, beispielsweise aus Glas, abzulagern und dort bei 100 bis 300°C zu fixieren. Diese Aus führung wird für Flachbett-Reaktoren angewandt, welche mit Sonnenlicht bestrahlt werden (DE 42 37 390). Die Haltbarkeit dieser sozusagen nur angetrockneten photokatalytischen Schicht ist begrenzt.It is also known to oxidic photocatalysts from a suspension on a carrier ger, for example made of glass, and fix it there at 100 to 300 ° C. This out guidance is used for flat-bed reactors that are irradiated with sunlight (DE 42 37 390). The durability of these, so to speak, only dried photocatalytic Shift is limited.
Schließlich ist bekannt, in der Strömungsrichtung der zu behandelnden Flüssigkeit, insbeson dere verunreinigtem Wasser, eine poröse Filterscheibe anzuordnen, durch welche die Flüs sigkeit zwangsläufig hindurchtreten muß, wobei die auf der Filtratseite mit einem Photokata lysator beschichtet ist und bestrahlt wird (WO 89/02418). Nachteilig an dieser Anordnung ist, daß das nach dem unvermeidlichen Zusetzen des Filters notwendig werdende Rückspülen die Filterrückstände wieder in das Retentat verbringt, aus dem sie doch entfernt werden sol len. Finally, it is known, in particular in the direction of flow of the liquid to be treated contaminated water to arrange a porous filter disc through which the rivers liquid must necessarily pass through, the one on the filtrate side with a photocata lyser is coated and irradiated (WO 89/02418). A disadvantage of this arrangement is that the backwashing that becomes necessary after the inevitable clogging of the filter returns the filter residue to the retentate, from which it should be removed len.
Der Erfindung liegt die Aufgabe zugrunde, eine integrierte Vorrichtung der eingangs genann ten Art zu schaffen, die bei guter geometrischer Ausnutzung der UV-Strahlung zwangsläufig jedes Flüssigkeitspartikel einer in etwa gleichen Strahlungsdosis aussetzt, die leicht herstell bar, robust und leicht zu reinigen ist.The invention has for its object an integrated device of the aforementioned ten kind to create, which inevitably with good geometric exploitation of UV radiation exposes each liquid particle to an approximately equal dose of radiation that is easy to manufacture bar, robust and easy to clean.
Diese Aufgabe wird durch die in den Patentansprüchen beschriebene Erfindung gelöst.This object is achieved by the invention described in the claims.
Die erfindungsgemäße Lösung ermöglicht die Kombination von auf das Anlagenvolumen be zogen besonders hoher Filtrationsleistung nach dem Crossflow-Prinzip als Vorreinigung mit intensiver photokatalytischer Wirksamkeit, indem eine größtmögliche Filterfläche mit mini maler innerer Abschattung gegenüber der UV-Strahlung vereint werden.The solution according to the invention enables the combination of be on the system volume drew particularly high filtration performance according to the crossflow principle as pre-cleaning intensive photocatalytic effectiveness by using the largest possible filter area with mini painterly inner shading against UV radiation.
Die Werkstoffkombination von porösen Keramikmembranen mit aufgesinterter Katalysator schicht, insbesondere aus TiO₂, ermöglicht bei Verblockungen des Crossflow-Filters und/oder beim Nachlassen der Aktivität des Photokatalysators eine Regenerierung der Vor richtung durch aggressive Reinigungsmittel, Wärmebehandlung (insbesondere zur Entkei mung) und auch eine Neubeschichtung mit Katalysator durch in der Keramik bekannte Be schichtungsverfahren.The material combination of porous ceramic membranes with sintered catalyst layer, in particular made of TiO₂, enables the crossflow filter to become blocked and / or when the activity of the photocatalyst diminishes, regeneration of the pre direction by aggressive cleaning agents, heat treatment (especially to escape mung) and also a new coating with catalyst by Be known in ceramics stratification process.
Die Erfindung wird nachstehend an einem Ausführungsbeispiel näher erläutert. Die beigefüg ten Zeichnungen stellen dar:The invention is explained in more detail below using an exemplary embodiment. The attached The drawings show:
Fig. 1 zeigt einen Längsschnitt durch ein zylindrisches Mehrkanalrohr. Fig. 1 shows a longitudinal section through a cylindrical multi-channel pipe.
Fig. 2 zeigt einen Querschnitt durch dasselbe. Fig. 2 shows a cross section through the same.
Fig. 3 zeigt einen Querschnitt durch eine Vorrichtung mit hexagonalem Mehrkanalrohr und mehreren, dazu parallelen stabförmigen UV-Entladungsrohren. Fig. 3 shows a cross section through a device with a hexagonal multi-channel tube and a plurality of parallel rods to UV arc tubes.
Fig. 4 zeigt eine parallel zu ihrer Längsachse geöffnete erfindungsgemäße Vorrichtung, bei welcher nach Anspruch 10 die Einkanalrohre und die mäanderförmigen Entladungsrohre senkrecht zueinander angeordnet sind. Fig. 4 shows an open parallel to their longitudinal axis device of the invention, wherein according to claim 10, the Einkanalrohre and the meander-shaped discharge tubes are arranged perpendicular to each other.
Fig. 5 zeigt einen Querschnitt durch eine Vorrichtung nach Anspruch 11. Fig. 5 shows a cross section through a device according to claim 11.
Bei der nachfolgenden Erläuterung der beigefügten Zeichnungen, die weitgehend für sich selbst sprechen, sind die funktionswichtigen Membranen 2 und 4 zur Verdeutlichung über trieben dick dargestellt. Im übrigen versteht es sich von selbst, daß in den verschiedenen Figuren Teile mit gleicher Funktion auch mit gleichen Bezugszahlen versehen wurden.In the following explanation of the accompanying drawings, which largely speak for themselves, the functionally important membranes 2 and 4 are shown thick for clarification. For the rest, it goes without saying that in the different figures, parts with the same function have also been provided with the same reference numbers.
Die Fig. 1 und 2 zeigen Schnitte durch ein erfindungsgemäßes Mehrkanalrohr 5, dessen poröser Support (Träger) 1 aus gesintertem Aluminiumoxid beispielsweise einen Außen durchmesser von 20 mm hat und die vier Bohrungen 6 einen Innendurchmesser von bei spielsweise je 3 mm haben. Auf der Retentatseite R wird unter Druck eine zu behandelnde Schadstoffflüssigkeit, beispielsweise vorfiltriertes Deponieabwasser, zugeführt. Nach dem Crossflow-Verfahren durchdringt es eine keramische Filtrationsmembran 2 (ebenfalls aus Aluminiumoxid, Zirkonoxid oder auch Titandioxid), dann den Support 1 und schließlich die photokatalytisch wirksame Keramikmembran 4 aus Titandioxid. Dort auf der Filtratseite F trifft auf den fein verteilt austretenden Flüssigkeitsfilm eine UV-Strahlung, deren höchste spektrale Intensität beispielsweise bei einer Wellenlänge von 250 nm liegt. Die erwähnten Schadstoffe werden hier durch Photokatalyse in unschädliche Bausteine derselben, wie Was ser und Kohlendioxid sowie anorganische Stoffe, zerlegt. Figs. 1 and 2 show sections through an inventive multi-channel tube 5, the porous support (carrier) 1 made of sintered alumina, for example, an outer diameter of 20 mm has and the four holes 6 have mm an internal diameter of at play, 3 each. On the retentate side R, a pollutant liquid to be treated, for example prefiltered landfill waste water, is supplied under pressure. According to the crossflow process, it penetrates a ceramic filtration membrane 2 (also made of aluminum oxide, zirconium oxide or also titanium dioxide), then the support 1 and finally the photocatalytically active ceramic membrane 4 made of titanium dioxide. There, on the filtrate side F, UV radiation strikes the finely distributed liquid film, the highest spectral intensity of which is, for example, at a wavelength of 250 nm. The pollutants mentioned are broken down here by photocatalysis into harmless building blocks, such as water and carbon dioxide and inorganic substances.
Die für die erfindungsgemäße Vorrichtung verwendeten Werkstoffe vereinen hohe Tempera turbeständigkeit, lange Lebensdauer, hohe selektive Durchlässigkeit, chemische Resistenz in einem weiten Bereich der pH-Werte, Resistenz gegen biologische Stoffe sowie Lebensmittel verträglichkeit. Die Vorrichtungen können mit hohen Drücken rückgespült, mit Dampf steri lisiert und chemisch mit aggressiven Reinigungsmitteln, wie beispielsweise mit HNO₃ oder NaOH, gereinigt werden. The materials used for the device according to the invention combine high temperatures Resistance to turbidity, long service life, high selective permeability, chemical resistance in a wide range of pH values, resistance to biological substances and food compatibility. The devices can be backwashed at high pressures, with steam steri lized and chemically with aggressive cleaning agents such as HNO₃ or NaOH.
Die Fig. 3 und 4 zeigen verschiedene Anordnungen von UV-Entladungsrohren 7 in Modulen 10, wobei die Innenfläche des Modulgehäuses 8 zweckmäßigerweise als Reflektor für die UV-Strahlung ausgebildet ist. FIGS. 3 and 4 show various arrangements of UV discharge pipes 7 in modules 10, wherein the inner surface of the module housing 8 is expediently designed as a reflector for the ultraviolet radiation.
Fig. 5 zeigt eine Anordnung mit nur zwei UV-Entladungsrohren 7, wobei die seitlichen, ge genüber der UV-Strahlung ohne Anwendung eines Reflektors abgeschatteten Bereiche durch eine Glasur 9 abgedichtet sind, die naturgemäß möglichst die gleiche chemische Beständig keit aufweisen soll wie die übrigen Bestandteile der erfindungsgemäßen Vorrichtung. Fig. 5 shows an arrangement with only two UV discharge tubes 7 , the lateral, ge compared to UV radiation without the use of a reflector shaded areas are sealed by a glaze 9 , which should naturally have the same chemical resistance as possible as the rest Components of the device according to the invention.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE1995115828 DE19515828A1 (en) | 1995-04-29 | 1995-04-29 | Integrated filter and photocatalysis device for removing contaminants from liquids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE1995115828 DE19515828A1 (en) | 1995-04-29 | 1995-04-29 | Integrated filter and photocatalysis device for removing contaminants from liquids |
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Publication Number | Publication Date |
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DE19515828A1 true DE19515828A1 (en) | 1996-10-31 |
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Family Applications (1)
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DE1995115828 Withdrawn DE19515828A1 (en) | 1995-04-29 | 1995-04-29 | Integrated filter and photocatalysis device for removing contaminants from liquids |
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DE (1) | DE19515828A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10114537A1 (en) * | 2001-03-21 | 2002-10-24 | Elipsa Gmbh | Separation of highly heterogeneous mixtures, e.g. proteins, comprises using array of filter membranes with systematically varying separation properties |
DE102005050721A1 (en) * | 2005-10-19 | 2007-04-26 | Institut für Bioprozess- und Analysenmesstechnik e.V. | Particle with pores exhibiting an internal pore surface, useful for removing impurities e.g. aromatic compounds, comprises a photo-reactive material layer, and an internal pore surface in which microorganism is partially immobilized |
EP1870379A1 (en) * | 2006-06-23 | 2007-12-26 | Global Engineering and Trade S.p.A. | Water purification system by means of a photocatalytic process |
CN108147599A (en) * | 2018-02-28 | 2018-06-12 | 中国人民解放军陆军军医大学 | Water purification film |
CN108164079A (en) * | 2018-02-28 | 2018-06-15 | 中国人民解放军陆军军医大学 | A kind of Simple water purifier |
CN110697956A (en) * | 2019-11-19 | 2020-01-17 | 佛山科学技术学院 | Photocatalysis sewage treatment plant with filtering mechanism |
CN113479988A (en) * | 2021-08-16 | 2021-10-08 | 南京工业大学 | Visible light catalysis-Fenton membrane reactor for wastewater treatment |
CN115286064A (en) * | 2022-10-08 | 2022-11-04 | 陇东学院 | Light reaction device for oil field sewage treatment |
EP4282831A1 (en) | 2022-05-24 | 2023-11-29 | Zahnen Technik GmbH | Water treatment plant for destroying organic pollutants in water |
-
1995
- 1995-04-29 DE DE1995115828 patent/DE19515828A1/en not_active Withdrawn
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10114537A1 (en) * | 2001-03-21 | 2002-10-24 | Elipsa Gmbh | Separation of highly heterogeneous mixtures, e.g. proteins, comprises using array of filter membranes with systematically varying separation properties |
DE102005050721A1 (en) * | 2005-10-19 | 2007-04-26 | Institut für Bioprozess- und Analysenmesstechnik e.V. | Particle with pores exhibiting an internal pore surface, useful for removing impurities e.g. aromatic compounds, comprises a photo-reactive material layer, and an internal pore surface in which microorganism is partially immobilized |
EP1870379A1 (en) * | 2006-06-23 | 2007-12-26 | Global Engineering and Trade S.p.A. | Water purification system by means of a photocatalytic process |
CN108147599A (en) * | 2018-02-28 | 2018-06-12 | 中国人民解放军陆军军医大学 | Water purification film |
CN108164079A (en) * | 2018-02-28 | 2018-06-15 | 中国人民解放军陆军军医大学 | A kind of Simple water purifier |
CN110697956A (en) * | 2019-11-19 | 2020-01-17 | 佛山科学技术学院 | Photocatalysis sewage treatment plant with filtering mechanism |
CN113479988A (en) * | 2021-08-16 | 2021-10-08 | 南京工业大学 | Visible light catalysis-Fenton membrane reactor for wastewater treatment |
EP4282831A1 (en) | 2022-05-24 | 2023-11-29 | Zahnen Technik GmbH | Water treatment plant for destroying organic pollutants in water |
DE102022113128A1 (en) | 2022-05-24 | 2023-11-30 | Zahnen Technik Gmbh | Water treatment system for destroying organic pollutants in water and use of a water treatment system |
CN115286064A (en) * | 2022-10-08 | 2022-11-04 | 陇东学院 | Light reaction device for oil field sewage treatment |
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Owner name: POROCER KERAMIKMEMBRANEN GMBH, 07629 HERMSDORF, DE |
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8139 | Disposal/non-payment of the annual fee |