DE10058335A1 - Production of oxygen from air comprises pressure swing adsorbing oxygen from pre-cleaned compressed process air enriched with oxygen using a molecular sieve arranged as an adsorber in a pressure vessel, and removing the desorbed oxygen - Google Patents

Production of oxygen from air comprises pressure swing adsorbing oxygen from pre-cleaned compressed process air enriched with oxygen using a molecular sieve arranged as an adsorber in a pressure vessel, and removing the desorbed oxygen

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Publication number
DE10058335A1
DE10058335A1 DE10058335A DE10058335A DE10058335A1 DE 10058335 A1 DE10058335 A1 DE 10058335A1 DE 10058335 A DE10058335 A DE 10058335A DE 10058335 A DE10058335 A DE 10058335A DE 10058335 A1 DE10058335 A1 DE 10058335A1
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Prior art keywords
oxygen
air
pressure swing
enriched
molecular sieve
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DE10058335A
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German (de)
Inventor
Juraj Petrovic
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Messer Griesheim GmbH
Messer Tatragas sro
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Messer Griesheim GmbH
Messer Tatragas sro
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Priority to DE10058335A priority Critical patent/DE10058335A1/en
Publication of DE10058335A1 publication Critical patent/DE10058335A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02—Preparation of oxygen
    • C01B13/0229—Purification or separation processes
    • C01B13/0248—Physical processing only
    • C01B13/0259—Physical processing only by adsorption on solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/116—Molecular sieves other than zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/12—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/104—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • B01D53/0476—Vacuum pressure swing adsorption
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0046—Nitrogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0053—Hydrogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0062—Water
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Abstract

Production of oxygen from air comprises pressure swing adsorbing oxygen from pre-cleaned compressed process air enriched with oxygen using a molecular sieve arranged as an adsorber in a pressure vessel; and removing the desorbed oxygen from the pressure vessels in variable time intervals with sieve regeneration. Preferred Features: The air is oxygen-enriched waste air produced during biological cleaning of effluent. The waste air contains at least 30 vol.% oxygen. The oxygen produced is re-fed to the plant for processing effluent.. Carbon dioxide is removed from the air before the pressure swing adsorption is carried out and is used as neutralizing agent for alkaline effluent.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Sauerstoff aus Luft mittels Druckwechseladsorption, nach den Merkmalen des Oberbegriffs von Anspruch 1.The invention relates to a method for producing oxygen from air by means of Pressure swing adsorption, according to the features of the preamble of claim 1.

Druckwechseladsorption ist immer dann besonders günstig, wenn aus Luft Wasserstoff, Sauerstoff oder Stickstoff in Produktströmen zwischen 10 und 1500 m3/h mit Reinheiten von 95 und 99,9 Vol.-% hergestellt werden soll. Diesbezüglich finden sowohl Ein-Bett- als auch Mehrbett-Druckwechseladsorptionsverfahren/- systeme (PSA; V(P)SA) Verwendung.Pressure swing adsorption is always particularly favorable when hydrogen, oxygen or nitrogen is to be produced from air in product flows between 10 and 1500 m 3 / h with purities of 95 and 99.9 vol.%. In this regard, both single-bed and multi-bed pressure swing adsorption processes / systems (PSA; V (P) SA) are used.

Sauerstoff wird mittels der sogenannten Vacuum Swing Adsorption (VSA) hergestellt. Hierzu wird vorgereinigte und komprimierte Luft mittels eines in einem Druckbehälter angeordneten und aus einem Kohlenstoff-Molekularsieb bestehenden Adsorbers aus der Luft adsorbiert, wobei angereicherter Stickstoff im Luftstrom verbleibt. Zur Desorption des Sauerstoffs wird der mit Sauerstoff beladene Adsorber in variablen Zeitintervallen mittels Druckabsenkung regeneriert und der dadurch aus dem Molekularsieb desorbierte Sauerstoff zusammen mit dem in dem Luftstrom angereicherten Stickstoff aus dem Druckbehälter abgezogen und einer weiteren Verwendung zugeführt.Oxygen is produced using so-called vacuum swing adsorption (VSA). For this purpose, pre-cleaned and compressed air is used in a pressure vessel arranged and consisting of a carbon molecular sieve adsorber adsorbed in the air, with enriched nitrogen remaining in the air stream. to Desorption of oxygen becomes variable in the adsorber loaded with oxygen Regenerated time intervals by lowering the pressure and thereby from the Molecular sieve desorbed oxygen along with that in the air stream enriched nitrogen withdrawn from the pressure vessel and another Fed use.

Für einen relativ geringen Sauerstoffbedarf von 5 bis 10 Tonnen pro Tag mit einer geforderten Produktreinheit von bis zu 95% werden kleine und leicht handhabbare Druckwechseladsorptionsanlagen, welche bereits mit Anschlüssen für die Luftein­ speisung, Vakuumpumpen, Adsorptionsbehältern, Ventilen, Rohrleitungen und einem Hochdruckpufferbehälter ausgerüstet sind, eingesetzt. For a relatively low oxygen requirement of 5 to 10 tons per day with one required product purity of up to 95% are small and easy to handle Pressure swing adsorption systems, which already have connections for the air inlet supply, vacuum pumps, adsorption tanks, valves, pipes and one High pressure buffer tanks are used.  

Aufgrund dessen, dass die bisher zur Herstellung von Sauerstoff mittels Druck­ wechseladsorption eingesetzte Luft nur einen Sauerstoffanteil von etwa 22 Vol.-% aufweist, erfordert diese herkömmliche Sauerstoff-Gewinnung einen relativ hohen prozesstechnischen Aufwand.Because of the fact that previously used to produce oxygen by means of pressure alternating adsorption air used only an oxygen content of about 22 vol .-% this conventional oxygen production requires a relatively high one process engineering effort.

Der Erfindung liegt daher die Aufgabe zugrunde, ein gattungsgleiches Verfahren zur kostengünstigen Herstellung von Sauerstoff zur Verfügung zu stellen.The invention is therefore based on the object of a generic method for to provide inexpensive production of oxygen.

Diese Aufgabe wird gelöst durch ein Verfahren mit den Merkmalen des Patentanspruchs 1.This object is achieved by a method with the features of Claim 1.

Dadurch, daß beim erfindungsgemäßen Verfahren zur Herstellung von Sauerstoff mittels Druckwechseladsorption anstelle von Umgebungsluft sauerstoffangereicherte Prozessabluft in Form von sauerstoffangereicherter Abluft aus biologischer Abwasserreinigung eingesetzt wird, kann der prozesstechnische Aufwand bei der Druckwechseladsorption zur Herstellung von Sauerstoff gesenkt und damit kostengünstig Sauerstoff erzeugt werden.The fact that in the inventive method for the production of oxygen by means of pressure swing adsorption instead of ambient air Process exhaust air in the form of oxygen-enriched exhaust air from biological Waste water purification is used, the process engineering effort at Pressure swing adsorption for the production of oxygen reduced and thus Oxygen can be generated inexpensively.

Zur erfindungsgemäßen Herstellung von Sauerstoff wird die einen Sauerstoffgehalt von mindestens 30 Vol.-% enthaltene Abluft der biologischen Abwasserreinigung mittels mindestens einer über jedes Belebtschlamm-Wassergemisch enthaltene Anlagenbecken installierten Absaug- und Transporteinrichtung abgesaugt und einer im Bereich der biologischen Abwasserreinigung angeordneten Druckwechselad­ sorptionsanlage zugeführt. Aus der vorgereinigten und komprimierten Abluft wird beim Durchströmen eines in einem Druckbehälter angeordneten Molekularsiebs der Sauerstoff aus der Abluft mittels des Adsorbers adsorbiert. Zur Desorption des Sauerstoffs aus dem als Adsorber in dem Druckbehälter der Druckwechseladsorptionsanlage eingesetzten, in der Regel aus Kohlenstoff- Adsorptionsmateral bestehenden Molekularsieb wird der mit Sauerstoff beladene Adsorber in variablen Zeitintervallen durch Druckabsenkung regeneriert und der dadurch im Druckbehälter freigesetzte Sauerstoff getrennt von dem im Luftstrom angereichert vorliegenden Stickstoff aus dem Druckbehälter abgezogen.For the production of oxygen according to the invention, the oxygen content Exhaust air from biological wastewater treatment containing at least 30% by volume by means of at least one contained in each activated sludge / water mixture Plant pool installed suction and transport device and one Pressure swing wheel arranged in the area of biological wastewater treatment sorption system supplied. The pre-cleaned and compressed exhaust air becomes when flowing through a molecular sieve arranged in a pressure vessel Adsorbed oxygen from the exhaust air. To desorb the Oxygen from the as an adsorber in the pressure vessel Pressure swing adsorption system used, usually made of carbon Molecular sieve existing on the adsorption side becomes the one loaded with oxygen The adsorber is regenerated in variable time intervals by lowering the pressure this releases oxygen in the pressure vessel separately from that in the air flow  enriched nitrogen is withdrawn from the pressure vessel.

Als Absaugeinrichtung können mittels herkömmlicher Aufhängung über jedes Belebtschlamm-Wassergemisch enthaltene Becken der biologischen Abwasserreinigung angeordnete, der jeweiligen Beckenform angepasste und mit herkömmlichen Absaugaggregaten wie beispielsweise Vakuumpumpen, ausgerüstete, vorzugsweise trichterförmige Abzugshauben aus korrosionsbeständigen Werkstoff, welche über Produktleitungen mit der Lufteinspeisung der Druckwechseladsorptionsanlage verbunden sind, Verwendung finden.As a suction device can by means of conventional suspension over each Activated sludge-water mixture containing biological pools Wastewater treatment arranged, adapted to the respective pool shape and with conventional suction units such as vacuum pumps, equipped, preferably funnel-shaped hoods corrosion-resistant material, which is connected with the product lines Air supply to the pressure swing adsorption system are connected, use Find.

Als im Rahmen der Erfindung eingesetzte Druckwechseladsorptionsanlage eignet sich besonders eine bereits mit Anschlüssen für die Lufteinspeisung, Vakuum­ pumpen, Adsorptionsbehältern, Ventilen, Rohrleitungen und einem Hochdruck­ pufferbehälter vormontierte, mobile Kleinanlage, wie beispielsweise eine GENEROX ®-Druckwechseladsorptionsanlage der Fa. Messer Griesheim GmbH Frankfurt/Main.Suitable as a pressure swing adsorption system used in the invention especially one already with connections for air supply, vacuum pumps, adsorption tanks, valves, pipes and a high pressure Buffer tank pre-assembled, small mobile system, such as a GENEROX ® pressure swing adsorption system from Messer Griesheim GmbH Frankfurt / Main.

Besonders vorteilhaft ist es, den aus sauerstoffangereicherter Prozessluft in Form von sauerstoffangereicherter Abluft aus biologischen Abwasserreinigung mittels Druckwechseladsorption erzeugten Sauerstoff wieder der biologischen Abwasser­ reinigung zuzuführen.It is particularly advantageous in the form of oxygen-enriched process air of oxygen-enriched exhaust air from biological wastewater treatment using Pressure swing adsorption again generated oxygen from the biological wastewater supply cleaning.

Dazu kann der erfindungsgemäß erzeugte Sauerstoff mittels der bereits in einer biologischen Abwasseranlage vorhandenen Eintragsaggregate, wie z. B. mittels Begasungsmatten, Begasungsschläuchen und Injektoren, in das Belebtschlamm- Wassergemisch von jedem Belebungsbecken eingetragen werden.For this purpose, the oxygen generated according to the invention can be generated in a biological sewage system existing entry units, such as. B. means Fumigation mats, fumigation hoses and injectors, into the activated sludge Water mixture from each aeration tank can be entered.

Die Effektivität des erfindungsgemäßen Verfahrens wird zusätzlich erhöht, wenn der (in der sauerstoffangereicherten Abluft der biologischen Abwasserreinigung enthaltenen) Kohlendioxid (vor der) Druckwechseladsorption aus der Abluft entfernt und als Neutralisationsmitel für alkalische Abwässer Verwendung findet. The effectiveness of the method according to the invention is additionally increased if the (in the oxygen-enriched exhaust air from biological wastewater treatment contained) carbon dioxide (before) pressure swing adsorption removed from the exhaust air and is used as a neutralizing agent for alkaline wastewater.  

Das erfindungsgemäße Verfahren zu Herstellung von Sauerstoff aus sauerstoffangereicherter Prozessabluft in Form von Abluft aus biologischer Abwasserreinigung mittels Druckwechseladsorption gewährleistet die Herstellung von kostengünstigem Sauerstoff. Zudem wird durch die erfindungsgemäss vorgesehene Wiedereinspeisung des durch Druckwechseladsorption erzeugten Sauerstoffs in das Belebtschlamm-Wassergemisch einer biologischen Abwasserreinigung deren Effektivität erhöht.The process according to the invention for producing oxygen from Oxygen-enriched process exhaust air in the form of exhaust air from biological Waste water purification using pressure swing adsorption ensures production of inexpensive oxygen. In addition, according to the invention envisaged re-feeding of the generated by pressure swing adsorption Oxygen in the activated sludge-water mixture of a biological Wastewater treatment increases its effectiveness.

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert.A preferred embodiment of the invention is described below with reference to FIG Drawing explained in more detail.

Die einzige Figur (Fig. 1) zeigt schematisch das erfindungsgemäße Verfahren zum Herstellen von Sauerstoff aus Luft mittels Druckwechseladsorption.The only figure ( FIG. 1) schematically shows the method according to the invention for producing oxygen from air by means of pressure swing adsorption.

Aus dem Belebtschlamm-Wassergemisch einer biologischen Abwasserreinigung 1 wird sauerstoffangereicherte Abluft mit einem Sauerstoffgehalt von mindestens 30 Vol.-% mittels einer über jedes Belebungsbecken installierten, leistungsvariablen Absaug- und Transporteinrichtung 2 einer VSA-Druckwechseladsorptionsanlage 3 zugeführt. Aus der vorgereinigt und auf einen Druck von 5 bis 10 bar komprimiert in einen Druckbehälter der Druckwechseladsorptionsanlage 2 eingespeisten Abluft der biologischen Abwasserreinigung 1 wird mittels eines Kohlenstoff-Molekularsiebes (Adsorbers) Sauerstoff aus der Abluft adsorbiert, wobei Wasserstoff und Stickstoff im Luftstrom verbleiben. Die Desorption des Sauerstoffs erfolgt durch in variablen Zeitintervallen stattfindenden Druckabsenkungen in dem Molekularsieb. Der desorbierte Sauerstoff wird zusammen mit dem Wasserstoff und Stickstoff enthaltenen Luftstrom aus dem Druckbehälter der Druckwechseladsorptionsanlage 2 abgezogen und über mittels Produktleitung/en verbundenen Sauerstoff-Eintragsag­ gregate 4, wie beispielsweise herkömmliche Begasungsmatten, Begasungs­ schläuche oder Injektoren, wieder in das Belebtschlamm-Wassergemisch jedes Belebungsbecken der biologischen Abwasserreinigung 1 eingetragen.From the activated sludge-water mixture of a biological wastewater treatment 1 , oxygen-enriched waste air with an oxygen content of at least 30% by volume is fed to a VSA pressure swing adsorption system 3 by means of a variable-capacity suction and transport device 2 installed above each activation tank. From the pre-cleaned and compressed to a pressure of 5 to 10 bar compressed in a pressure vessel of the pressure swing adsorption system 2 of the biological wastewater treatment 1 , oxygen is adsorbed from the exhaust air by means of a carbon molecular sieve (adsorber), with hydrogen and nitrogen remaining in the air stream. The oxygen is desorbed by pressure drops in the molecular sieve taking place at variable time intervals. The desorbed oxygen is withdrawn together with the air stream containing hydrogen and nitrogen from the pressure vessel of the pressure swing adsorption system 2 and is returned to the activated sludge / water mixture of each activated sludge via oxygen inlet units 4 connected via product line / s, such as conventional fumigation mats, fumigation hoses or injectors biological wastewater treatment 1 entered.

Anstelle des in diesem bevorzugten Ausführungsbeispiels erfolgenden Sauerstoffeintrags in das Belebtschlamm-Wassergemisch jedes Belebungsbecken der biologischen Abwasserreinigung 1 kann der aus der Druckwechseladsorptions­ anlage 1 abgezogene Sauerstoff auch ganz oder teilweise zwischengelagert oder direkt als gasförmiges oder verflüssigtes Sauerstoffprodukt einem Verbraucher zugeführt werden.Instead of the oxygen input into the activated sludge-water mixture in each activated sludge tank of the biological wastewater treatment 1 , the oxygen drawn off from the pressure swing adsorption system 1 can also be wholly or partly temporarily stored or fed directly to a consumer as a gaseous or liquefied oxygen product.

Claims (5)

1. Verfahren zur Herstellung von Sauerstoff aus Luft mittels Druckwechsel­ adsorption, bei welchem aus der vorgereinigten und komprimierten Luft mittels eines in mindestens einem Druckbehälter als Adsorber angeordneten Molekularsiebs Sauerstoff adsorbiert und der durch eine in variablen Zeitinter­ vallen mittels Druckabsenkung erfolgende Siebregenerierung aus dem Molekularsieb desorbierte Sauerstoff aus dem Druckbehälter abgezogen wird, dadurch gekennzeichnet, daß als Einsatzluft sauerstoffangereicherte Prozessluft Verwendung findet.1. A process for the production of oxygen from air by means of pressure swing adsorption, in which oxygen is adsorbed from the pre-cleaned and compressed air by means of a molecular sieve arranged in at least one pressure vessel as an adsorber, and the sieve generation from the molecular sieve desorbed from the molecular sieve by means of pressure reduction in variable time intervals is withdrawn from the pressure vessel, characterized in that oxygen-enriched process air is used as the feed air. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Prozessluft sauerstoffangereicherte Abluft einer biologischen Abwasserreinigung (1) Verwendung findet.2. The method according to claim 1, characterized in that oxygen-enriched waste air from a biological waste water treatment ( 1 ) is used as process air. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die sauerstoffangereicherte Abluft der biologischen Abwasserreinigung (1) mindestens 30 Vol.-% Sauerstoff enthält.3. The method according to claim 1 or 2, characterized in that the oxygen-enriched exhaust air from the biological wastewater treatment ( 1 ) contains at least 30 vol .-% oxygen. 4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der mittels Druckwechseladsorption (2) erzeugte Sauerstoff vorzugsweise wieder der biologischen Abwasserreinigung (1) zugeführt wird.4. The method according to any one of the preceding claims, characterized in that the oxygen generated by pressure swing adsorption ( 2 ) is preferably fed back to the biological wastewater treatment ( 1 ). 5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in der sauerstoffangereicherten Abluft der biologischen Abwasserreinigung enthaltenes Kohlendioxid vor der Druckwechseladsorption (2) aus der Abluft entfernt wird und bevorzugt als Neutralisationsmittel für alkalische Abwässer Verwendung findet.5. The method according to any one of the preceding claims, characterized in that carbon dioxide contained in the oxygen-enriched exhaust air of the biological waste water treatment is removed from the exhaust air before the pressure swing adsorption ( 2 ) and is preferably used as a neutralizing agent for alkaline waste water.
DE10058335A 2000-11-24 2000-11-24 Production of oxygen from air comprises pressure swing adsorbing oxygen from pre-cleaned compressed process air enriched with oxygen using a molecular sieve arranged as an adsorber in a pressure vessel, and removing the desorbed oxygen Withdrawn DE10058335A1 (en)

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DE10058335A DE10058335A1 (en) 2000-11-24 2000-11-24 Production of oxygen from air comprises pressure swing adsorbing oxygen from pre-cleaned compressed process air enriched with oxygen using a molecular sieve arranged as an adsorber in a pressure vessel, and removing the desorbed oxygen

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014095243A1 (en) * 2012-12-19 2014-06-26 Endress+Hauser Conducta Gesellschaft Für Mess- Und Regeltechnik Mbh+Co. Kg Method and arrangement for reducing carbon dioxide emissions in water treatment plants

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2707745A1 (en) * 1976-02-27 1977-09-08 Boc Ltd PROCESS AND DEVICE FOR ENRICHMENT OF THE CONTENT OF A GAS CONTAINED AS A MIXTURE COMPONENT IN A GAS MIXTURE
US4643743A (en) * 1983-02-10 1987-02-17 Union Carbide Corporation Pressure swing adsorption process for supplying oxygen under variable demand conditions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2707745A1 (en) * 1976-02-27 1977-09-08 Boc Ltd PROCESS AND DEVICE FOR ENRICHMENT OF THE CONTENT OF A GAS CONTAINED AS A MIXTURE COMPONENT IN A GAS MIXTURE
US4643743A (en) * 1983-02-10 1987-02-17 Union Carbide Corporation Pressure swing adsorption process for supplying oxygen under variable demand conditions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014095243A1 (en) * 2012-12-19 2014-06-26 Endress+Hauser Conducta Gesellschaft Für Mess- Und Regeltechnik Mbh+Co. Kg Method and arrangement for reducing carbon dioxide emissions in water treatment plants

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