NL2012309C2 - Bioreactor and method of mixing an influent with a sludge in such bioreactor. - Google Patents

Bioreactor and method of mixing an influent with a sludge in such bioreactor. Download PDF

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Publication number
NL2012309C2
NL2012309C2 NL2012309A NL2012309A NL2012309C2 NL 2012309 C2 NL2012309 C2 NL 2012309C2 NL 2012309 A NL2012309 A NL 2012309A NL 2012309 A NL2012309 A NL 2012309A NL 2012309 C2 NL2012309 C2 NL 2012309C2
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Netherlands
Prior art keywords
bioreactor
mixing chamber
mixing
influent
outlet
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NL2012309A
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Dutch (nl)
Inventor
Pascal Telaar
Henk Buis
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Cod2Energy B V
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Priority to NL2012309A priority Critical patent/NL2012309C2/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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2866—Particular arrangements for anaerobic reactors
    • C02F3/2873—Particular arrangements for anaerobic reactors with internal draft tube circulation
    • 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
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
    • B01J4/004—Sparger-type elements
    • 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
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1284—Mixing devices
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Description

Bioreactor and method of mixing an influent with a sludge in such bioreactor
The present invention relates to a bioreactor. Such bioreactor can be used as an anaerobic and/or aerobic purification device for purification of an influent, such as wastewater.
Conventional bioreactors are used to perform an anaerobic, or aerobic, purification of wastewater. Such bioreactor comprises a container with a reactor chamber for fermentation, an inlet for supply of influent into the bioreactor, an outlet with an overflow gutter for collecting purified water by overflow, one or more liquid-gas-solids separator(s), and a degassing device for collecting and removing gas, such as methane, from the liquid. The purified water is also referred to as the effluent. Such bioreactors further comprise a rising pipe for supply of gas-liquid mixture by gas lift action into the degassing device or tank. In the degassing device the gas is to a large extent removed from the liquid. The liquid is returned as an internal recirculation flow via a so-called downer to the reaction chamber. EP 1888471 describes a conventional bioreactor comprising a reactor tank, an inlet for introducing influent, a water collector, a gas collector, a degassing device and a riser, and a downer. This conventional bioreactor aims at providing a head pressure on the recirculation pipe of at least 1.4 m. water column in the downer at the level of the liquid surface. A problem with conventional bioreactors is the reduction of effectivity or efficiency of the bioreactor when influent is fed to the microorganisms. In practice this may result in overfeeding the microorganisms. This may even occur in spite of mixing the influent with the liquid that is already present in the reaction chamber.
The present invention has for its object to provide a bioreactor obviating or at least reducing the aforementioned problems.
This objective is achieved with a bioreactor according to the invention, the bioreactor comprising: an inlet system for supply of an influent; a mixing chamber having a recirculation inlet for supply of a recirculation flow for mixing the recirculation flow with the influent supplied to the mixing chamber with the inlet system; and a reaction chamber comprising a fluid distribution system connecting the mixing chamber with the reaction chamber, wherein the inlet system comprises at least one outlet that is at least partially tangentially oriented relative to the mixing chamber, and wherein the at least one outlet is arranged at an angle relative to the horizontal.
By providing an inlet system influent can be supplied to the bioreactor. Such influent is a wastewater, for example. More particularly, the influent is supplied to a mixing chamber. The bioreactor according to the present invention separates the mixing chamber from the reaction chamber. This separates the different functions of these chambers thereby providing the possibility to optimise both functions independent of each other.
The mixing chamber further comprises an inlet for supply of a recirculation flow. In use, the reaction chamber is provided with an influent via the inlet system, and with a recirculation flow of a recirculation flow system via the recirculation inlet. The recirculation inlet is the outlet part of a recirculation pipe, downer or other downpipe that circulates liquid within the bioreactor, for example.
In a presently preferred embodiment according to the invention, the bioreactor further comprises a degassing device that separates the gas that is produced in the reaction chamber from the liquid. From the degassing device the liquid is recirculated and supplied to the mixing chamber using the recirculation pipe.
According to the invention, in use, the influent and the circulated liquid are mixed in the mixing chamber. The reaction chamber comprises a fluid distribution system that connects the mixing chamber with the reaction chamber. The fluid distribution system supplies the reaction chamber with the mixture of influent and recirculation flow.
By providing the inlet system with at least one outlet, which is at least partially tangentially oriented, a mixing effect is achieved in the mixing chamber. The inlet is connected to the mixing chamber such that in use the influent is provided in an at least partially tangential direction of the mixing chamber. The enhanced mixing prevents the microorganisms in the reaction from being overfed.
According to the invention the at least one outlet of the inlet system for the influent is arranged at an angle to the horizontal and to the vertical. This further increases the mixing effect that is achieved in the mixing chamber. Optionally, a recirculation inlet is also at least partially tangentially oriented to further enhance the mixing effect in the mixing chamber.
By providing the at least one influent outlet at an angle to the horizontal, the mixing effect is further improved. This horizontal will typically correspond to the substantially horizontal surface of the liquid in the mixing chamber and, in most cases, also with the bottom surface of the mixing chamber.
Providing the at least one outlet of the inlet system at least partially tangentially and at an angle to the horizontal significantly increases the mixing effect in the mixing chamber. This improves the mixing of the recirculation flow with the influent and prevents undiluted influent from coming into direct contact with the microorganisms that are located in the reaction chamber. This prevents these microorganisms to be overfed, which would significantly reduce the efficiency of the bioreactor as a whole. Therefore, the improved mixing effect in a separate mixing chamber increases the efficiency of the bioreactor as a whole as compared to conventional bioreactors by supplying the microorganisms in the reaction chamber with an optimally mixed fluid.
The combination of providing the at least one outlet of the inlet system at least partially tangentially, and arranging the outlet at an angle to the horizontal has as a further effect a pressure reduction in the recirculation pipe due to a venturi-effect that in use is achieved in the mixing chamber. This venturi-effect provides a pull effect in the downer. This reduces the requirements for such a recirculation system.
Preferably, the inlet system comprises more than one, and for example four, outlet(s) that are distributed over the mixing chamber and are at least partially tangentially oriented. Preferably, the one or more outlets are arranged at, adjacent to and/or in close proximity of a side wall of the mixing chamber to further improve the mixing effect and/or venturi-effect in the mixing chamber. Optionally, also the one or more inlets of the recirculation system are arranged at, adjacent to and/or in close proximity of a side wall of the mixing chamber.
In a presently preferred embodiment the bioreactor comprises a degassing device that is preferably placed above the reaction chamber. By reducing the pressure in the recirculation pipe, more specifically in the downer, the construction of this degassing device and/or recirculation system can be simplified and/or the dimensions thereof can be significantly reduced. This contributes to a more cost effective bioreactor. More specifically, the angle relative to the horizontal, at which the at least one outlet of the inlet system is arranged, is such that a relatively low head pressure on the recirculation pipe will suffice to provide a sufficient recirculation flow as compared to conventional bioreactors. This relatively low head pressure on the recirculation pipe reduces the pressure difference that in use is achieved between a first reference point in the recirculation flow and a second reference point in the bioreactor. In the above mentioned presently preferred embodiment of the bioreactor according to the invention a degassing device is provided above the reaction chamber and a downer provides the recirculation flow back to the mixing chamber. For example, in this embodiment the two reference points lie at the same level that preferably corresponds to the liquid surface level in the bioreactor. The gas that is produced in the reaction chamber of the bioreactor is collected in the degassing device above the liquid level and thereby produces a downward flow in the downer or recirculation pipe. The combination of features according to the present significantly reduces the required pressure in the degassing device while still achieving the desired mixing effect in the mixing chamber and corresponding process reactions in the reaction chamber.
In a presently preferred embodiment of a typical bioreactor according to the present invention the head pressure on the recirculation pipe that is required for the recirculation system can be below 0.12 bar, or preferably below 0.11 bar, and most preferably below 0.10 bar.
Preferably this relates to an additional water column in the recirculation pipe of about 1.2 m., 1.1 m and 1.0 m respectively. Depending on the specific configuration of the bioreactor according to the present invention, the required head pressure on the recirculation pipe can be further reduced to below 0.075 bar, more preferably below 0.050 bar, and even more preferably below 0.025 bar.
This renders the purification process more cost effective in the bioreactor according to the invention. More in particular, operating the bioreactor with a head pressure on the recirculation pipe below 0.12 bar, or preferably below 0.11 bar, and most preferably below 0.10 bar improves the operation of the bioreactor as a whole as compared to conventional bioreactors that require a significantly higher head pressure on the recirculation pipe. According to the invention the head pressure on the recirculation pipe can be reduced due to the venturi-effect in the mixing chamber that provides a pull effect in the downer. This effect can be achieved by providing an outlet of the inlet system in a specific manner to the mixing chamber as describe earlier.
In a presently preferred embodiment according to the invention, the angle of the at least one outlet of the inlet system relative to the horizontal is in the range of 30°-75°, preferably in the range of 40°-60°, and is most preferably about 50°.
By providing the outlet at an angle in the range of 30°-75°, the mixing effect of the recirculation flow and the influent in the mixing chamber is optimised. An angle of about 50° achieves the most optimal mixing effect and/or venturi-effect for the influent in a presently preferred embodiment of the bioreactor according to the present invention.
In a presently preferred embodiment according to the present invention the at least one outlet of the inlet system comprises a constriction to achieve a fluid pressure reduction. More particularly, the constriction is configured to achieve and/or increase the venturi-effect in the mixing chamber thereby reducing the required head pressure on the recirculation pipe for the desired recirculation flow.
By providing a constriction in the outlet of the inlet system a venturi-effect is achieved and/or increased that enhances the mixing effect in the mixing chamber. This effect is achieved when the influent flows through the constricted section of the outlet of the inlet system. In addition, as already mentioned the venturi-effect achieves a reduction in the required head pressure on the recirculation pipe for providing a desired recirculation flow from the degassing device to the mixing chamber.
In a further presently preferred embodiment according to the present invention the fluid distribution system comprises a number of pipes and outlets for transporting the fluid from the mixing chamber to the reaction chamber.
By providing the fluid distribution system with a number of pipes and outlets the fluid can be transferred from the mixing chamber to the reaction chamber. Preferably, the number of pipes and outlets relates to more than one pipe and more than one outlet to further enhance the mixing of the influent and the recirculation flow in relation to the contents of the reaction chamber. This further prevents an overfeeding effect of influent to the microorganisms in the reaction chamber.
In a further preferred embodiment according to the present invention, the fluid distribution system comprises a partitioning wall with a number of plates, with the plates comprising openings to supply the fluid from the mixing chamber to the reaction chamber.
By providing a partitioning wall the reaction chamber and the mixing chamber are separated in an effective manner. By providing the plates with openings the fluid can be transferred from the mixing chamber to the reaction chamber.
Preferably, the openings in the plates of the partitioning wall comprise so-called slits that are optionally arranged in a substantial radial direction of the bioreactor. These slits further improve the distribution of the incoming mixture of influent and recirculation liquid in the reaction chamber thereby further reducing the risk of overfeeding the microorganisms in the reaction chamber.
Furthermore, preferably the plates are arranged at an angle to the horizontal. This further improves the operation in the reaction chamber. The horizontal is in use substantially parallel to the surface of the liquid in the reaction chamber and in most common configurations of the bioreactor according to the present invention also substantially parallel to the bottom of the bioreactor. The angle of the plates is preferably above 30°, preferably in the range of 45°-60°, and more preferably in the range of 50°-60°. Providing the plates at the above mentioned angle further improves the effectivity of the bioreactor according to the invention.
The invention further also relates to a method for mixing an influent with a sludge in a bioreactor as described above.
Such method provides the same effects and advantages as those stated with reference to the bioreactor.
Preferably, the method according to the present invention supplies the influent to a mixing chamber. In the mixing chamber a mixing operation of the influent with the recirculation flow that is also provided to the mixing chamber is performed. The recirculation flow preferably originates from the degassing device that in the presently preferred embodiment is located above the reaction chamber. The mixing chamber provides a thoroughly mixed fluid of influent and recirculation flow to the reaction chamber. In the reaction chamber the fermentation takes place and gas, such as methane, is produced.
In a presently preferred configuration of the bioreactor according to the present invention, the gas lifts liquid towards the degassing device that is located above the reaction chamber. Gas is removed and the remaining liquid is recirculated with a recirculation pipe, downward pipe or downer and supplied to the mixing chamber. Preferably, the operational head pressure on the recirculation pipe is significantly reduced as compared to conventional purification processes, as described for the bioreactor according to the invention.
Further advantages, features and details of the invention are elucidated on the basis of preferred embodiments thereof, wherein reference is made to the accompanying drawings in which:
Fig. 1 shows an overview of a bioreactor according to the present invention;
Fig. 2 shows details of the mixing chamber in the bioreactor of figure 1; and Fig. 3 shows an overview of an alternative bioreactor according to the present invention.
Bioreactor 2 (figure 1) comprises an inlet part 4, a reaction chamber 6, and separation compartment 8 with degassing device 10.
The fluid is supplied by inlet pipe 14. The fluid enters mixing chamber 16. A recirculation flow is fed to mixing chamber by downer 18. The mixed fluid leaves mixing chamber by fluid distribution system 20. Fluid distribution system comprises 20 a number of distribution pipes 22 that are provided in a pattern such that the fluid is distributed. In the illustrated embodiment the distribution pipes 22 comprise a number of nozzles 24 that are oriented towards bottom 26 of reactor 2 and are provided in a radial direction of reactor 2.
The mixed fluid enters reaction chamber 6 and is treated. In a presently preferred embodiment reaction chamber 6 comprises microorganisms that anaerobically treat the mixed fluid. The reaction chamber can be designed in any conventional manner, for example in a fluid bed configuration with microorganisms being provided on carriers.
On top of reaction chamber there is arranged separation compartment 8 including one or more settlers, for example. In separation compartment 8 the liquid-gas-solids mixture is separated using a number of conventional hoods, for example. With a conventional riser, gas-liquid mixture is supplied to degassing device 10 due to gas-lift action and the gas-liquid mixture is separated.
Gas is collected and accumulated in degassing device 10. Due to the head pressure on the recirculation pipe in degassing device 10 and/or gravity a recirculation flow of liquid from the degassing device 10 is supplied by downer to mixing chamber. Part of the liquid that is treated in bioreactor 2 is discharged from reactor 2 by a conventional overflow/discharge, for example using overflow gutters.
Mixing chamber 16 (figure 2) comprises a top surface 28 with inlet 30. Inlet 30 is connected to downer 18. In the illustrated embodiment inlet 30 is provided at centreline 32 of mixing chamber 16 that in the illustrated embodiment also is the centreline of bioreactor 2. Mixing chamber 16 further comprises side wall 34 with inlet 36. Inlet 36 is connected to inlet pipe 14. Inlet 36 is arranged such that fluid to be treated enters mixing chamber 16 at an angle a to centreline 32.
In the illustrated embodiment fluid enters mixing chamber 16 at side wall 34 and, therefore, at a tangential direction thereby increasing the mixing effect with the recirculation flow entering mixing chamber 16 at or close to centreline 32. The angle of the inflow of fluid to be treated with the horizontal, in the illustrated embodiment substantially parallel to bottom 26 of reactor 2, is equal to 90°-a. Mixing chamber 16 comprises chamber bottom 38 that rests on support 40 that is provided between mixing chamber 16 and bottom 26 of reactor 2. In the illustrated embodiment mixed fluid leaves mixing chamber 16 by outlets 42 that are provided in side wall 34 close to chamber bottom 38. Outlets 42 are connected to distribution pipes 22. Furthermore, in the illustrated embodiment a number of suction pipes 44 provided with supports 46 are provided to remove sludge. In addition, a number of inlets/outlets 48, 50 is provided.
In the illustrated embodiment inlet pipe 14 is provided with an angle β in the range of 20°-60°, preferably about 30°-50°, and most preferably about 35°. As inlet pipe 14 enters bioreactor 2, 52 in a horizontal direction angle β=90°-α. From experiments it is understood that especially the combination of the angles a and β with the tangential inflow in mixing chamber 16, 34 provide an optimal mixing effect without requiring significant modification of conventional reactors and/or the use of additional equipment. This renders the use of mixing chamber 26 applicable to conventional bioreactors.
Bioreactor 52 (figures 3 and 4) is provided with downer 18 that supplies recirculation fluid to alternative mixing chamber 54. Chamber 54 is provided with top surface 28, inlet 30, and side wall 34. Outlet 56 is provided at the bottom surface of mixing chamber 54, preferably by omitting a bottom plate. Fluid distribution system 58 comprises frame 60 that supports plates 62. Grooveshaped openings 64 distribute mixed fluid from mixing chamber 54 through outlet 56 and distribution system 58 to reaction chamber 6 of reactor 52. Furthermore, in the illustrated embodiment a number of suction pipes 66, 68 are provided to remove sludge.
The incoming fluid to be treated in bioreactor 2, 52 is provided at an angle a and in a tangential direction at, or close to sidewall 34 of mixing chamber 16, 54.
It will be understood that different configurations and/or different dimensions of the bioreactor are possible depending on specific conditions of an application, for example.
The present invention is by no means limited to the above described preferred embodiments thereof. The rights sought are defined by the following claims within the scope of which many modifications can be envisaged.
Clauses 1. Bioreactor comprising: an inlet system for supply of an influent; a mixing chamber having a recirculation inlet for supply of a recirculation flow for mixing the recirculation flow with the influent supplied to the mixing chamber with the inlet system; and a reaction chamber comprising a fluid distribution system connecting the mixing chamber with the reaction chamber, wherein the inlet system comprises at least one outlet that is at least partially tangentially oriented relative to the mixing chamber, and wherein the at least one outlet is arranged at an angle relative to the horizontal. 2. Bioreactor according to clause 1, wherein the at least one outlet is configured such that in use a venturi-effect is achieved. 3. wherein the angle is in the range of 30°-75°, preferably in the range of 40°-60°, and most preferably about 50°. 4. Bioreactor according to clause 1, 2 or 3, wherein the angle is such that in use a head pressure on a recirculation pipe is achieved in the bioreactor of below 0.12 bar, preferably below 0.11 bar and most preferably below 0.10 bar. 5. Bioreactor according to according to one or more of the foregoing clauses, wherein the outlet of the inlet system for supply of the influent is arranged at, adjacent to and/or in the proximity of a side wall at the mixing chamber. 6. Bioreactor according to one or more of the foregoing clauses, wherein the at least one outlet of the inlet system comprises a constriction to achieve a fluid pressure reduction. 7. Bioreactor according to one or more of the foregoing clauses, wherein the fluid distribution system comprises a number of pipes and outlets for transporting the fluid from the mixing chamber to the reaction chamber. 8. Bioreactor according to one or more of the foregoing clauses, wherein the fluid distribution system comprises a partioning wall with a number of plates, with the plates comprising openings to supply the fluid from the mixing chamber to the reaction chamber. 9. Bioreactor according to clause 8, wherein the openings comprise slits. 10. Bioreactor according to clause 8 or 9, wherein the plates are arranged at an angle relative to the horizontal. 11. Bioreactor according to clause 10, wherein the angle is above 30°, preferably in the range of 45°-60°, and more preferably in the range of 50°-60°. 12. Method of mixing an influent with a sludge in a bioreactor according to one or more of the foregoing clauses.

Claims (12)

1. Bioreactor omvattende: een inlaatsysteem voor het toevoeren van een influent; een mengkamer, met een recirculatie-inlaat voor het toevoeren van een recirculatiestroom, voor het mengen van de recirculatiestroom met de influent toegevoerd aan de mengkamer met het inlaatsysteem; en een reactiekamer omvattende een fluïdumdistributiesysteem welke de mengkamer met de reactiekamer verbindt, waarin het inlaatsysteem ten minste één uitlaat omvat welke ten minste gedeeltelijk tangentiaal is georiënteerd ten opzichte van de mengkamer, en waarin de ten minste ene uitlaat is aangebracht onder een hoek met de horizontaal.A bioreactor comprising: an inlet system for supplying an influent; a mixing chamber, with a recirculation inlet for supplying a recirculation stream, for mixing the recirculation stream with the influent supplied to the mixing chamber with the inlet system; and a reaction chamber comprising a fluid distribution system connecting the mixing chamber to the reaction chamber, wherein the inlet system comprises at least one outlet which is at least partially tangentially oriented with respect to the mixing chamber, and wherein the at least one outlet is disposed at an angle to the horizontal . 2. Bioreactor volgens conclusie 1, waarin de ten minste ene uitlaat zodanig is geconfigureerd dat in gebruik een venturi-effect wordt bewerkstelligd.A bioreactor according to claim 1, wherein the at least one outlet is configured such that a venturi effect is achieved in use. 3. Bioreactor volgens conclusie 1 of 2, waarin de hoek ligt in het bereik van 30°-75°, bij voorkeur in het bereik van 40°-60° en met de meeste voorkeur ongeveer 50° bedraagt.A bioreactor according to claim 1 or 2, wherein the angle is in the range of 30 ° -75 °, preferably in the range of 40 ° -60 ° and most preferably is about 50 °. 4. Bioreactor volgens conclusie 1, 2 of 3, waarin de hoek zodanig is dat in gebruik een kopdruk (“head pressure”) op een recirculatiestroom wordt bewerkstelligd in de bioreactor van ten hoogste 0,12 bar, bij voorkeur ten hoogste 0,11 bar en met de meeste voorkeur ten hoogste 0,10 bar.Bioreactor according to claim 1, 2 or 3, wherein the angle is such that in use a head pressure on a recirculation flow is achieved in the bioreactor of at most 0.12 bar, preferably at most 0.11 bar and most preferably at most 0.10 bar. 5. Bioreactor volgens één of meer van de voorgaande conclusies, waarin de uitlaat van het inlaatsysteem voor het toevoeren van de influent is aangebracht aan of nabij een zijwand van de mengkamer.Bioreactor according to one or more of the preceding claims, wherein the outlet of the inlet system for supplying the influent is arranged on or near a side wall of the mixing chamber. 6. Bioreactor volgens één of meer van de voorgaande conclusies, waarin de uitlaat van het inlaatsysteem een restrictie omvat voor het bewerkstelligen van een druk verlagend effect.A bioreactor according to one or more of the preceding claims, wherein the outlet of the inlet system comprises a restriction for effecting a pressure reducing effect. 7. Bioreactor volgens één of meer van de voorgaande conclusies, waarin het fluïdumdistributiesysteem een aantal pijpen en uitlaten omvat voor het transporteren van het fluïdum van de mengkamer naar de reactiekamer.7. Bioreactor according to one or more of the preceding claims, wherein the fluid distribution system comprises a number of pipes and outlets for transporting the fluid from the mixing chamber to the reaction chamber. 8. Bioreactor volgens één of meer van de voorgaande conclusies, waarin het fluïdumdistributiesysteem een scheidingswand met een aantal platen omvat, waarbij de platen openingen omvatten voor het toevoeren van het fluïdum van de mengkamer aan de reactiekamer.A bioreactor according to one or more of the preceding claims, wherein the fluid distribution system comprises a dividing wall with a plurality of plates, the plates comprising openings for supplying the fluid from the mixing chamber to the reaction chamber. 9. Bioreactor volgens conclusie 8, waarin de openingen sleuven omvatten.The bioreactor of claim 8, wherein the openings comprise slots. 10. Bioreactor volgens conclusie 8 of 9, waarin de platen zijn aangebracht onder een hoek ten opzichte van de horizontaal.10. Bioreactor according to claim 8 or 9, wherein the plates are arranged at an angle to the horizontal. 11. Bioreactor volgens conclusie 10, waarin de hoek groter dan 30° is, bij voorkeur is gelegen in het bereik van 45°-60°, en met de meeste voorkeur in het bereik van 50°-60°.A bioreactor according to claim 10, wherein the angle is greater than 30 °, preferably in the range of 45 ° -60 °, and most preferably in the range of 50 ° -60 °. 12. Werkwijze voor het mengen van een influent met een slib in een bioreactor volgens één of meer van de voorgaande conclusies.A method for mixing an influent with a sludge in a bioreactor according to one or more of the preceding claims.
NL2012309A 2014-02-21 2014-02-21 Bioreactor and method of mixing an influent with a sludge in such bioreactor. NL2012309C2 (en)

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GB1400064A (en) * 1972-08-03 1975-07-16 Electricity Council Treatment of an effluent using an activated sludge process
US4097026A (en) * 1975-01-24 1978-06-27 Vyzkumny Ustav Vodohospodarsky Apparatus for mixing a basic liquid substance with other media
EP0089466A1 (en) * 1982-03-22 1983-09-28 BLUM, Albert Submerged aerator
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