WO2008017487A1 - Process and device for treating what are termed food waste reject-containing wastewaters, and also use thereof - Google Patents

Process and device for treating what are termed food waste reject-containing wastewaters, and also use thereof Download PDF

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Publication number
WO2008017487A1
WO2008017487A1 PCT/EP2007/007066 EP2007007066W WO2008017487A1 WO 2008017487 A1 WO2008017487 A1 WO 2008017487A1 EP 2007007066 W EP2007007066 W EP 2007007066W WO 2008017487 A1 WO2008017487 A1 WO 2008017487A1
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Prior art keywords
treatment
food waste
reject
biomass
reactor
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PCT/EP2007/007066
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German (de)
French (fr)
Inventor
Nina Wölfel
Wolfgang Eggert
Henry Risse
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Krüger WABAG GmbH
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Publication of WO2008017487A1 publication Critical patent/WO2008017487A1/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
    • B63J4/004—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating sludge, e.g. tank washing sludge
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
    • 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
    • C02F2301/043—Treatment of partial or bypass streams
    • 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
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • 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
    • Y02W10/20—Sludge processing

Definitions

  • the invention relates to a method for the treatment of so-called food waste reject (often also short food reject) containing wastewaters, a device and a particular use of the device and the method.
  • Wastewater flow is equal. This is due to the unfavorable separation properties of these materials.
  • the object is achieved by a method according to claim 1 and a device according to claim 4.
  • the food waste reject-containing effluents are treated separately from the other effluents.
  • the food waste reject-containing effluents are subjected to an aerobic treatment, together with excess sludge of an aerobic treatment plant, in particular the biological main stage, in which regular excess sludge is obtained, with a concentration of 10-30 g / l by membrane filtration is possible.
  • this treatment is carried out in a separate reactor, so that a retrofit can be done.
  • a stirrer in the reactor can be installed.
  • the inventively designed reactor can be operated without additional separation and concentration of the active biomass.
  • the excess sludge from the aerobically operating reactor for the treatment of food waste reject-containing wastewater can be fed to the usual sludge dewatering or other aftertreatment.
  • the volumetrically very small, but freight-related very significant part stream is treated in a small volume and thereby transferred to a mold, the subsequent treatment steps such as mechanical dewatering of material significantly simplified.
  • the "actual" aerobic biological stage treating the other wastewater can be relieved of 20-35% and, above all, the extreme load peaks that would otherwise result from the uncontrolled addition of food waste reject-containing wastewater can be avoided.
  • the invention schematically shows a reactor 10, which initially has a
  • Supply line 1 Food waste reject-containing wastewater can be supplied.
  • the reactor 10 is further supplied via a feed line 2 biomass, in particular excess sludge a conventional aerobic wastewater treatment plant.
  • the process air required for the aerobic treatment is contained in the sludge-like mixture in the reactor from the food waste reject
  • Wastewater and the supplied biomass supplied via a supply line 4 wherein a distribution system for the process air is not shown in detail.
  • an agitator may be provided.
  • a uniform distribution of the process air and mixing in the suspension is possible.
  • a defoamer can be metered via a line 6.
  • 3 macerated solids can optionally be fed from a pre-screening via a line. Excess biomass can, if appropriate with the aid of a pump, be discharged via a line 5, specifically for disposal or other utilization.
  • the reactor 10 can also be designed as a retrofittable unit for use in existing offshore installations.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Public Health (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Processing Of Solid Wastes (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention relates to a process for treating what are termed food waste reject-containing wastewaters, in which further treatment proceeds in an aerobic biological stage. To avoid overloading the systems, according to the invention these food waste reject-containing wastewaters are treated separately. Biomass, for example from the surplus sludge of an aerobic sewage treatment plant, is added to the bulk stream in which food waste reject fractions are present, wherein this mixture is subjected to an aerobic treatment. In advance, this bulk stream can be subjected to an at least partial solid separation. A device for carrying out this process is expediently constructed as a reactor (10) which is constructed separately from a device such as a further reactor for treating a main wastewater stream, and therefore is also retrofittable. The invention is suitable, in particular, for offshore facilities such as ships.

Description

Verfahren und Vorrichtung zur Behandlung von so genannten Food-Waste- Reject-haltigen Abwässern sowie eine Verwendung Method and device for the treatment of so-called food-waste-reject wastewaters and a use
Die Erfindung betrifft ein Verfahren zur Behandlung von so genannten Food-Waste- Reject-(häufig auch kurz Food-Reject) haltigen Abwässern, eine Vorrichtung sowie eine besondere Verwendung der Vorrichtung und des Verfahrens.The invention relates to a method for the treatment of so-called food waste reject (often also short food reject) containing wastewaters, a device and a particular use of the device and the method.
Auf Off-shore Einrichtungen, insbesondere modernen Schiffen der Kreuzschifffahrt mit großen Passagierzahlen fallen so genannte Food-Waste-Rejecte, kurz häufig Food- Rejecte genannt, in den Abwässern an. Deren Entsorgung muss als sehr problematisch angesehen werden. Diese Food-Waste-Rejecte bestehen typisch aus Speiseresten und Küchenabfällen aller Art und weisen außerordentlich hohe BSB5, CSB und Feststoffkonzentrationen auf. Eine meist vorgeschaltete Zerkleinerung und Feststoffabsiebung bzw. -abtrennung ermöglicht zwar eine teilweise Feststoffrückhaltung und damit eine teilweise Entfrachtung, jedoch wird das vorgenannte Problem dadurch nicht beseitigt. Food-Waste-Reject-haltige Abwässer weisen BSB5-Konzentrationen über 20g/l und TS-Konzentrationen um lOg/1 auf, so dass der Volumenstrom dieses Abwassers eher einem Schlamm als einemOn off-shore facilities, especially modern ships of cruise shipping with large numbers of passengers are so-called food waste rejects, in the short term often called Food Rejecte, in the wastewater. Their disposal must be regarded as very problematic. These food waste rejects typically consist of food waste and kitchen waste of all kinds and have extremely high BOD5, COD and solids concentrations. Although a mostly upstream crushing and Feststoffabsiebung or separation allows a partial solids retention and thus a partial Entfrachtung, but the aforementioned problem is not eliminated. Food-waste-reject wastewaters have BOD5 concentrations above 20 g / l and TS concentrations around 10 g / l, so that the volume flow of this effluent is more likely to be a sludge than a sludge
Abwasserstrom gleicht. Dies ist in den ungünstigen Abtrenneigenschaften dieser Materialien begründet.Wastewater flow is equal. This is due to the unfavorable separation properties of these materials.
Bei den hier in Rede stehenden Off-shore-Einrichtungen erfolgt die Behandlung der übrigen Abwässer in einer aeroben biologischen Stufe, einer aeroben Kläranlage. Die vorstehend genannten Food-Waste-Reject-haltigen Abwässer werden mangels geeigneter anderer Behandlungstechnologien in einer solchen aeroben Kläranlage zusammen mit den übrigen Abwässern mitbehandelt. Dies fuhrt zu extremen Belastungsspitzen und den damit zusammenhängenden Betriebsproblemen wie zeitweiligem Sauerstoffmangel, extremen Überschussschlammabfall und Überlastung der Systeme zur Biomasseabtrennung und dergleichen und damit letztendlich zu signifikanten Verschlechterungen der Ablaufwerte der gesamten Anlage.In the case of the offshore facilities in question, the treatment of the remaining wastewater takes place in an aerobic biological stage, an aerobic treatment plant. The aforementioned food waste reject-containing wastewater are treated for lack of suitable other treatment technologies in such an aerobic treatment plant together with the other wastewater. This leads to extreme load peaks and associated operational issues such as temporary oxygen deficiency, extreme excess sludge waste and congestion of the biomass separation systems and the like, and ultimately significant worsening of the overall system runoff.
Für derartige Abwässer oder Dünnschlämme wäre daher eine anaerobe Behandlung beispielsweise in einer Bioabfallvergärungsanlage vorzuziehen. Dies ist zwar fürFor such effluents or thin sludges, therefore, an anaerobic treatment would be preferable, for example, in a biowaste fermentation plant. This is true for
Anfallstellen an Land praktikabel und wird auch praktiziert, jedoch ist für Anfallstellen auf Off-Shore-Einrichtungen, insbesondere Schiffen, eine anaerobe Behandlung aus sicherheitstechnischen Gründen nicht zulässig, insbesondere wegen der Methangärung. Es ist daher Aufgabe der vorliegenden Erfindung, ein Behandlungsverfahren sowie eine entsprechende Vorrichtung anzugeben, durch die die genannten Nachteile überwunden und insbesondere eine effiziente Behandlungsmöglichkeit für Food- Waste-Reject-haltige Abwässer erreicht wird.Accumulation points on land practicable and is also practiced, however, for seizure points on off-shore facilities, especially ships, an anaerobic treatment for safety reasons is not allowed, especially because of methane fermentation. It is therefore an object of the present invention to provide a treatment method and a corresponding device, by which overcomes the disadvantages mentioned and in particular an efficient treatment option for food waste reject-containing wastewater is achieved.
Die Aufgabe wird durch ein Verfahren gemäß dem Anspruch 1 und eine Vorrichtung gemäß dem Anspruch 4 gelöst.The object is achieved by a method according to claim 1 and a device according to claim 4.
Gemäß der Erfindung werden die Food-Waste-Reject-haltigen Abwässer getrennt von den übrigen Abwässern behandelt. Gemäß der Erfindung werden die Food-Waste- Reject-haltigen Abwässer einer aeroben Behandlung unterzogen, und zwar zusammen mit Überschussschlamm einer aeroben Kläranlage, insbesondere der biologischen Hauptstufe, in der regelmäßig Überschussschlamm anfällt, wobei eine Aufkonzentrierung auf 10-30 g/l mittels Membranfiltration möglich ist.According to the invention, the food waste reject-containing effluents are treated separately from the other effluents. According to the invention, the food waste reject-containing effluents are subjected to an aerobic treatment, together with excess sludge of an aerobic treatment plant, in particular the biological main stage, in which regular excess sludge is obtained, with a concentration of 10-30 g / l by membrane filtration is possible.
Zweckmäßig erfolgt vorab eine Zerkleinerung und eine Feststoffabtrennung bei den Food-Waste-Reject-haltigen Abwässern. Vorteilhaft erfolgt eine regelmäßige oder, parameterbedingte Nachimpfung mit der zuzuführenden Biomasse, insbesondere aus dem Überschussschlamm, so dass stets ausreichende Biomasse vorhanden ist und bei Parameterabhängigkeit auch bei Abbauhemmungen im Gesamtsystem eingestellt werden kann.It is expedient to carry out a comminution and a solids separation in advance for the food-waste reject-containing wastewaters. Advantageously, there is a regular or parameter-related inoculation with the biomass to be supplied, in particular from the excess sludge, so that always sufficient biomass is present and can be adjusted in parameter dependence even in degradation inhibitions in the overall system.
Gemäß der Erfindung erfolgt nach Anspruch 4 diese Behandlung in einem getrennten Reaktor, so dass auch eine Nachrüstung erfolgen kann. Unterstützend kann zur Versorgung der Biozönose im Reaktor über Prozessluft, wie Luftsauerstoff oder technischer Reinsauerstoff, und einem geeigneten Verteilungssystem auch ein Rührwerk im Reaktor installiert sein.According to the invention according to claim 4, this treatment is carried out in a separate reactor, so that a retrofit can be done. In support of the biocenosis in the reactor via process air, such as atmospheric oxygen or technical pure oxygen, and a suitable distribution system, a stirrer in the reactor can be installed.
Aufgrund der geringen Volumenströme und der hohen eingangsseitigen Konzentrationen von Food-Waste-Reject und der Biomasse, als Überschussschlamm aus der aeroben Kläranlage, kann der erfindungsgemäß ausgebildete Reaktor ohne zusätzliche Abtrennung und Aufkonzentrierung der aktiven Biomasse betrieben werden. Der Überschussschlamm aus dem aerob arbeitenden Reaktor zur Behandlung der Food-Waste-Reject-haltigen Abwässer kann der üblichen Schlammentwässerung oder einer anderweitigen Nachbehandlung zugeführt werden.Due to the low volume flows and the high input-side concentrations of food waste reject and the biomass, as surplus sludge from the aerobic treatment plant, the inventively designed reactor can be operated without additional separation and concentration of the active biomass. The excess sludge from the aerobically operating reactor for the treatment of food waste reject-containing wastewater can be fed to the usual sludge dewatering or other aftertreatment.
Gemäß der Erfindung wird der volumenmäßig sehr kleine, jedoch frachtbezogen sehr bedeutsame Teilstrom in einem kleinen Volumen behandelt und dabei in eine Form überführt, die nachfolgende Behandlungsschritte wie maschinelle Entwässerung des entstehenden Materials entscheidend vereinfacht. Damit kann die, die übrigen Abwässer behandelnde „eigentliche" aerobe biologische Stufe um 20-35 % entlastet werden und können vor allem die sonst bei ungesteuerter Zugabe von Food-Waste- Reject-haltigen Abwässern entstehenden extremen Belastungsspitzen vermieden werden.According to the invention, the volumetrically very small, but freight-related very significant part stream is treated in a small volume and thereby transferred to a mold, the subsequent treatment steps such as mechanical dewatering of material significantly simplified. In this way, the "actual" aerobic biological stage treating the other wastewater can be relieved of 20-35% and, above all, the extreme load peaks that would otherwise result from the uncontrolled addition of food waste reject-containing wastewater can be avoided.
Die Erfindung wird anhand der in der einzigen Figur der Zeichnung dargestellten Vorrichtung gemäß der Erfindung erläutert.The invention will be explained with reference to the device according to the invention shown in the single figure of the drawing.
Die Erfindung zeigt schematisch eine Reaktor 10, dem zunächst über eineThe invention schematically shows a reactor 10, which initially has a
Zufuhrleitung 1 Food-Waste-Reject-haltige Abwässer zuführbar sind. Zur aeroben Behandlung wird dem Reaktor 10 ferner über eine Zuführleitung 2 Biomasse, insbesondere Überschussschlamm einer üblichen aeroben Abwasserreinigungsanlage zugeführt. Die zur aeroben Behandlung erforderliche Prozessluft wird in das schlammartige Gemisch in dem Reaktor aus dem Food-Waste-Reject-haltigenSupply line 1 Food waste reject-containing wastewater can be supplied. For aerobic treatment, the reactor 10 is further supplied via a feed line 2 biomass, in particular excess sludge a conventional aerobic wastewater treatment plant. The process air required for the aerobic treatment is contained in the sludge-like mixture in the reactor from the food waste reject
Abwasser und der zugeführten Biomasse über eine Zuführleitung 4 zugeführt, wobei ein Verteilungssystem für die Prozessluft nicht detailliert dargestellt ist. Ergänzend kann auch ein Rührwerk vorgesehen sein. Hierdurch ist eine gleichmäßige Verteilung der Prozessluft und Einmischung in die Suspension möglich. Gegebenenfalls kann ein Entschäumer über eine Leitung 6 eindosiert werden. Schließlich können optional über eine Leitung 3 mazerierte Feststoffe aus einer Vorsiebung zugeführt werden. Überschüssige Biomasse kann, gegebenenfalls mit Hilfe einer Pumpe, über eine Leitung 5 abgeführt werden, und zwar zur Entsorgung oder zu einer anderen Verwertung.Wastewater and the supplied biomass supplied via a supply line 4, wherein a distribution system for the process air is not shown in detail. In addition, an agitator may be provided. As a result, a uniform distribution of the process air and mixing in the suspension is possible. Optionally, a defoamer can be metered via a line 6. Finally, 3 macerated solids can optionally be fed from a pre-screening via a line. Excess biomass can, if appropriate with the aid of a pump, be discharged via a line 5, specifically for disposal or other utilization.
Es zeigt sich, dass der Reaktor 10 auch als nachrüstbare Einheit zur Verwendung bei bestehenden Off-shore- Anlagen ausgebildet sein kann.It can be seen that the reactor 10 can also be designed as a retrofittable unit for use in existing offshore installations.
Es ist zu erwähnen, dass bei Off-Shore-Einrichtungen insbesondere auf Schiffen die Abwässer in verschiedenen Systemen gesammelt und zwischengespeichert werden. Den üblichen biologischen Stufen einer aeroben Kläranlage fließen in der Regel Grauwässer, Schwarzwasser, Küchenwasser und Wäschereiabwasser zu. Die bisher übliche Zufuhr auch der Food-Waste-Reject-haltigen Abwässer kann durch die erfϊndungsgemäße Vorgehensweise vermieden werden, wodurch die sonst entstehenden Probleme überwunden werden können. It should be noted that in off-shore facilities, especially on ships, the wastewater is collected and cached in various systems. Gray water, black water, kitchen water and laundry wastewater usually flow to the usual biological stages of an aerobic wastewater treatment plant. The hitherto customary supply of food-waste reject-containing wastewater can be avoided by the erfϊndungsgemäße approach, whereby the otherwise resulting problems can be overcome.

Claims

Ansprüche claims
1. Verfahren zur Behandlung von so genannten Food-Waste-Reject-haltigen Abwässern, bei dem eine Weiterbehandlung in einer aeroben biologischen Stufe erfolgt, dadurch gekennzeichnet, dass dem Volumenstrom, in dem Food- Waste-Reject- Anteile enthalten sind, Biomasse, zum Beispiel aus dem Überschussschlamm einer aeroben Kläranlage, hinzugeführt wird und diese Mischung einer aeroben Behandlung unterworfen wird1. A method for the treatment of so-called food waste reject-containing waste water, in which a further treatment takes place in an aerobic biological stage, characterized in that the volume flow, are contained in the Food Waste Reject shares, biomass, for Example of the excess sludge of an aerobic treatment plant, is added and this mixture is subjected to an aerobic treatment
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Food-Waste-Reject-haltigen Abwässer vor der Zumischung der Biomasse einer Zerkleinerung und einer Feststoffabtrennung unterworfen werden, um zumindest eine partielle Feststoffentfrachtung des Volumenstroms, in dem die Food-Waste- Reject- Anteile enthalten sind, zu erhalten.2. The method according to claim 1, characterized in that the food waste reject-containing wastewater before admixing the biomass of a crushing and a solids separation are subjected to at least a partial Feststoffentfrachtung the volume flow in which the food waste rejection Shares are included.
3. Verfahren nach Anspruch 1 oder 2, gekennzeichnet durch eine Behandlung der Food-Waste-Reject-haltigen Abwässer mit einem Schlammbelastungsbereich zwischen 0,3 und 2 kg BSB5/(kg Biomasse *d), bei einer Biomassekonzentration zwischen 5 und 35 g/l.3. The method according to claim 1 or 2, characterized by a treatment of the food waste reject-containing wastewater with a mud load range between 0.3 and 2 kg BOD5 / (kg biomass * d), at a biomass concentration between 5 and 35 g / l.
4. Vorrichtung zur Behandlung von so genannten Food-Waste-Reject-haltigen Abwässern, dadurch gekennzeichnet, dass die Vorrichtung als ein Reaktor (10) ausgebildet ist, der zu einer Vorrichtung, wie einem weiteren Reaktor, zur Behandlung eines Haupt-Abwasserstroms getrennt ausgebildet ist, wobei dieser Reaktor (10) zur Behandlung der Food-Waste-Reject- haltigen Abwässer eine Zufuhrleitung (1) für einen Volumenstrom, in dem Food- Waste-Reject- Anteile enthalten sind, eine Zufuhrleitung (2) für Biomasse, eine Zufuhrleitung (4) für Prozessluft, insbesondere Sauerstoff, wie Luftsauerstoff oder technischer Reinsauerstoff, ein Luftverteilungssystem oder ein Sauerstoffverteilungssystem und eine Abführleitung (5) zur Entfernung eines überschüssigen Biomasse- Substratgemisches, insbesondere zu einer Nachbehandlung wie Phasentrennung, Trübwasserbehandlung, Schlammentsorgung oder dergleichen aufweist. 4. A device for the treatment of so-called food waste reject-containing waste water, characterized in that the device is designed as a reactor (10), which is formed separately to a device, such as another reactor, for treating a main sewage stream wherein said reactor (10) for treating the waste water containing food waste is a feed line (1) for a volume flow containing food waste reject parts, a feed line (2) for biomass, a feed line (4) for process air, in particular oxygen, such as atmospheric oxygen or technical pure oxygen, an air distribution system or an oxygen distribution system and a discharge line (5) for removing an excess biomass substrate mixture, in particular for a post-treatment such as phase separation, turbid water treatment, sludge disposal or the like.
5. Vorrichtung nach Anspruch 4, gekennzeichnet durch eine Zufuhrleitung (3) für mazerierte Feststoffe aus anderen Behandlungsschritten wie einer Vorbehandlung durch Zerkleinerung und Feststoffabsiebung.5. Apparatus according to claim 4, characterized by a feed line (3) for macerated solids from other treatment steps such as a pre-treatment by crushing and Feststoffabsiebung.
6. Vorrichtung nach Anspruch 4 oder 5, gekennzeichnet durch ein Rührwerk im Reaktor (10) zur Umwälzung.6. Apparatus according to claim 4 or 5, characterized by an agitator in the reactor (10) for circulation.
7. Anwendung des Verfahrens bzw. Verwendung der Vorrichtung auf Off-Shore- Einrichtungen, insbesondere solchen, bei denen anaerobe Behandlung unzulässig oder unerwünscht ist, wie bei Schiffen, insbesondere Kreuzfahrtschiffen. 7. Application of the method or use of the device on off-shore facilities, in particular those in which anaerobic treatment is inadmissible or undesirable, as in ships, especially cruise liners.
PCT/EP2007/007066 2006-08-09 2007-08-09 Process and device for treating what are termed food waste reject-containing wastewaters, and also use thereof WO2008017487A1 (en)

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