WO2016159870A1 - Bioréacteur à lit mobile et procédé de traitement de l'eau - Google Patents

Bioréacteur à lit mobile et procédé de traitement de l'eau Download PDF

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Publication number
WO2016159870A1
WO2016159870A1 PCT/SG2015/000107 SG2015000107W WO2016159870A1 WO 2016159870 A1 WO2016159870 A1 WO 2016159870A1 SG 2015000107 W SG2015000107 W SG 2015000107W WO 2016159870 A1 WO2016159870 A1 WO 2016159870A1
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WO
WIPO (PCT)
Prior art keywords
water
reactor vessel
moving bed
bed bioreactor
carrier elements
Prior art date
Application number
PCT/SG2015/000107
Other languages
English (en)
Inventor
Gerrit Hermann QUANTZ
Woei Kiat NG
Original Assignee
Cube 2 Pte Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cube 2 Pte Ltd filed Critical Cube 2 Pte Ltd
Priority to MYPI2017001364A priority Critical patent/MY184021A/en
Priority to PCT/SG2015/000107 priority patent/WO2016159870A1/fr
Priority to CN201580078384.1A priority patent/CN107428576A/zh
Priority to SG11201703612XA priority patent/SG11201703612XA/en
Publication of WO2016159870A1 publication Critical patent/WO2016159870A1/fr

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Classifications

    • 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
    • C02F3/08—Aerobic processes using moving contact bodies
    • 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
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/223—Activated sludge processes using circulation pipes using "air-lift"
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • C02F2209/225—O2 in the gas phase
    • 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
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/109—Characterized by the shape
    • 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

Definitions

  • This invention relates to a moving bed bioreactor and water treatment process.
  • the bioreactor and method are particularly suitable for improvement of water quality in landlocked water bodies such as ponds or lakes for the holding of shrimp, fish and other aquatic creatures to be produced under aquaculture conditions, but can also find application in other areas such as wastewater purification.
  • ammonia is the biggest problem in intensively stocked aquaculture systems such as tanks and ponds containing either salt or fresh water. Ammonia builds up rapidly in these environments due to waste products of the reared individuals, the regular addition of food, which contains nitrogenous compounds, organic debris from dead and dying organisms, uneaten feed, and faeces.
  • ammonia becomes noxious to aquatic life and therefore the control of these nitrogenous compounds is particularly important in intensive aquaculture ponds and tanks.
  • ammonia removal can be achieved using a biofilter for nitrification.
  • This type of biological treatment process employs bacteria that grow either attached to a surface (fixed films) or suspended in the water column (biofloc) and that successively oxidize ammonia to nitrite and nitrite to nitrate. This process needs aerobic conditions; usually oxygen is supplied by intensive aeration.
  • Other biological treatment processes may use other types of bacteria, which may operate in aerobic or anaerobic conditions, to remove other types of pollutant.
  • recirculating systems Water treatment systems in which pond or tank water is removed, filtered and sent back to. the pond or tank are called recirculating systems.
  • recirculating systems use fixed-film bioreactors, in which the bacteria (e.g., nitrifying bacteria) grow on either a wetted or submerged media surface.
  • the pollutant removal capacity of biological filters is largely dependent on the total surface area that is available for the growth of a biofilm formed by the bacteria. As long as sufficient area is provided for the colonizing bacteria, the removal rates will be proportional to the volume of media providing the surface area.
  • Efficient media are characterized by a high specific surface area, expressed as surface per unit volume and an optimal ratio of open pore space to allow minimal resistance of water flow over the biofilm to enable self-cleaning driven by the shear forces of the passing water flow.
  • FFBs fluidized sand beds
  • BPFs floating bead filters
  • RBCs rotating biological contactors
  • MBBRs moving bed bio reactors
  • Submerged biofilters include a volume of biofilter medium upon which nitrifying bacteria grow.
  • the wastewater flows in either an up-flow or a down-flow direction or in a completely mixed fashion.
  • the retention time can be controlled by adjusting the hydraulic flow rate through the reactor vessel.
  • the growing cell masses from nitrifying and heterotrophic bacteria can accumulate within the submerged filter, eventually blocking the void spaces of the media. For continuous and long-term operation, additional flow patterns need to be induced in the treatment volume in order to flush solids from the filter media. It is generally considered in the art that the most challenging aspect of operating any submerged biofilter is to keep it relatively free of accumulated bio-solids (feed, faeces, and bacterial floes).
  • MBBR moving bed bioreactor
  • polluted water is pumped to a tank containing floating biofilter media.
  • the floating media are agitated by aeration or other mixing technologies such that they undergo intense turbulent motion.
  • the shear forces induced by the mixing cause the polluted water to flow over the active surface area of the media, thereby cleaning the water.
  • the MBBR has a small footprint and low maintenance requirements.
  • MBBR still requires that the water to be treated be transported from the pond or tank to the treatment site.
  • a moving bed bioreactor comprising: a reactor vessel, comprising: a treatment section for holding a plurality of biofilm carrier elements; and
  • the reactor vessel is buoyant and comprises at least one sidewall and a lower wall, the at least one sidewall and/or the lower wall having a plurality of apertures for allowing flow of water into and out of the chamber when the reactor vessel is immersed in a body of water, each of said apertures being sized to prevent flow of the biofilm carrier elements out of the reactor vessel.
  • a buoyant reactor vessel which can be immersed directly in the body of water, for example a tank or pond, the water may be efficiently treated in situ and the treated water may then be directly recirculated to the tank or pond.
  • the apparatus has a smaller footprint than existing MBBR systems which provide one or more tanks located remotely from the body of water to be treated, and associated piping. Direct immersion in the water to be treated also means that a separate pumping system for transporting the water to the treatment site is not required.
  • the reactor vessel further comprises an outlet section in fluid communication with the treatment section and separated from the treatment section by a screen which is configured to prevent egress of biofilm carrier elements while permitting flow of water.
  • the outlet section provides a separate area of the vessel into which treated water can flow, for example for the purposes of active recirculation into the body of water. If the treated water is actively recirculated (for example, by pumping), it can be drawn from the outlet section without removing the biofilm carrier elements, which remain in the treatment section due to the presence of the screen.
  • the moving bed bioreactor has a water transport means, such as a pumping system, for transporting treated water from the outlet section to the body of water.
  • a water transport means such as a pumping system
  • the treated water can be directly expelled to the body of water in which the reactor vessel is immersed. If the body of water is a pond, for example, this can create an additional flow which prevents stratification in the pond, thereby reducing odours caused by production of hydrogen sulphide formed in anaerobic sediments.
  • water can be admitted directly from the pond bottom to the reactor vessel.
  • the agitator may comprise at least one gas entrainment device comprising at least one pressure source and configured to inject a pressurized gas into the reactor vessel.
  • the gas entrainment device may be an aeration device or an oxygenation device, for example.
  • the gas entrainment device may comprise at least one pipe having a plurality of apertures formed in at least a portion thereof, the at least a portion being disposed in the treatment section.
  • a plurality of pipes may be arranged concentrically with respect to each other.
  • the concentric arrangement of the pipes provides for even and thorough mixing of the biofilm carrier elements, and even aeration throughout the treatment section.
  • the apertures of the pipe or pipes may be disposed in a portion of the treatment section adjacent the lower wall. This may provide superior aeration since air bubbles emitted from the apertures have a greater path length through the treatment section.
  • the moving bed bioreactor may comprise a pump system for pumping treated water from the outlet section. This allows the treated water to be efficiently recirculated directly to the pond (or other body of water) from the reactor vessel, and may allow a directed flow of treated water into the pond, such that further aeration may occur as the treated water breaks the pond surface.
  • the pump system may be an airlift pump system, for example.
  • the at least one pressure source may act as a pressure source for the airlift pump system. Accordingly, therefore, the same pressure source may be used to drive both the agitator and the airlift pump system, providing for a more efficient configuration than if separate pressure sources were used.
  • the airlift pump system may comprise an airlift pipe disposed in the outlet section. If so, the screen separating the treatment section and the outlet section may be disposed around the airlift pipe.
  • the at least one pressure source is a compressor or blower system located remotely from the reactor vessel.
  • the moving bed bioreactor may comprise a spacer element for elevating the lower wall. This prevents inlet apertures in the lower wall from being blocked as might occur if the lower wall were to touch the pond bottom,
  • the moving bed bioreactor may further comprise a plurality of biofilm carrier elements disposed in the treatment section.
  • the reactor vessel is generally cylindrical. It may have a diameter approximately 1.5 times its height.
  • the present invention provides a water treatment process, comprising:
  • the method may further comprise allowing treated water to flow to an outlet section of the reactor vessel while retaining the biofilm carrier elements in the treatment section;
  • said agitating comprises injecting a pressurized gas into the reactor vessel.
  • the gas may be air or oxygen.
  • the gas may be injected at a plurality of injection points arranged concentrically with respect to each other. The injection points may be located adjacent a lower wall of the reactor vessel.
  • the treated water is expelled by pumping.
  • the pumping may be airlift pumping, for example.
  • a common pressure source is used for both the agitating and the pumping operations.
  • the plurality of apertures of the reactor vessel are formed in at least one sidewall and/or a lower wall of the reactor vessel.
  • FIG. 1 is a cross-sectional view through a moving bed bioreactor according to embodiments of the invention
  • Fig. 2 is a plan view from above of the moving bed bioreactor of Fig. 1 ;
  • Fig. 3 shows the apparatus of Fig. 1 and Fig. 2 in use
  • Fig. 4 is a flow chart of a water treatment process according to embodiments of the invention.
  • Air may be used to both agitate the biofilm carrier elements in the reactor vessel, and transport the water into and out of the reactor vessel, additionally creating a flow in the pond and avoiding stratification in the pond and reducing odours caused by the production of hydrogen sulphide gas formed in anaerobic sediments.
  • the pond water may be directly transported into the floating reactor vessel through perforations in the reactor vessel, and expelled from an outlet at the top of the reactor vessel, thereby allowing transport of water from the pond bottom to the pond surface, introducing additional oxygen in the process.
  • the biofilm carrier elements may be randomly mixed through aeration at the reactor vessel bottom, avoiding clogging and creating hydrodynamic forces that circulate the biofilm-carrying surfaces of the carrier elements, positively influencing the thickness of the biofilm by shear forces.
  • a moving bed bioreactor (MBBR) 100 suitable for immersion in a body of water, such as a pond, in order to treat water in the pond.
  • the MBBR 100 comprises a reactor vessel 1 which is substantially cylindrical in shape and which has a treatment section 30 for receiving a plurality of biofilm carrier elements 6 (Fig. 3).
  • a cylindrical shape is particularly advantageous, other cross- sectional shapes, such as octagonal, are also possible. If a polygonal cross-section is chosen then the angles between the edges of the polygon should be chosen to be large enough to allow efficient mixing of fluid throughout the treatment section 30 when the apparatus 100 is in operation.
  • the biofilm carrier elements 6 provide growth surfaces for the bacteria-containing biofilm. While media having any practical size and shape may be used, media having a high surface area of > 500m 2 /m 3 (typically up to about 750m 2 /m 3 ) is preferred.
  • One preferred form of support media is small plastic spheres or tubes, although any shape known in the art may be used. Suitable biofilm carriers are disclosed for example in European patent publication no. EP0750591 B2, the contents of which are hereby incorporated by reference in their entirety. Typically, about 50% to 70% of the reactor volume is filled with such media.
  • the plastic media is lightweight and may float in the water with a specific weight of the particles being close to 1.0 kg/dm 3 , typically having a density in the range 0.92 to 1.08 kg/dm 3 . Because the carrier elements 6 are immersed in the vessel, they make optimal contact between the impurities in the water and the microorganisms on the carriers 6 possible.
  • the reactor vessel 1 may be formed from a buoyant material such as high density polyethylene (HDPE).
  • a float chamber 2 may be provided in an upper portion of the reactor vessel 1 (preferably at its top) to provide buoyancy.
  • the float chamber 2 may, for example, be a section of the vessel body which is formed from the same material as that of the vessel body, sealed and air-filled.
  • the dimensions of the reactor vessel 1 and/or float chamber 2 may be chosen to provide a desired degree of buoyancy, for example such that the reactor vessel 1 can freely float at a desired operational water level in the pond.
  • the diameter of the reactor vessel 1 is approximately 1.5 times its height.
  • the level of the reactor vessel 1 in the pond may be adjusted by the use of stabilisation weights 14, if desired.
  • the stabilisation weights 14 may be arranged concentrically, preferably symmetrically, about a central axis of the vessel 1. Typically, two or more stabilisation weights 4 may be used.
  • the reactor vessel 1 has a lower portion 20 having a plurality of apertures 3, 23.
  • the lower portion 20 extends along approximately one third of the height of the vessel 1.
  • a first plurality of apertures 3 is formed in a sidewall 22 of the reactor vessel 1
  • a second plurality of apertures 23 is formed in a lower wall 4 of the vessel 1.
  • the apertures 3, 23 enable water exchange into and out of the treatment section 30 of the reactor 1 when the lower portion 20 is immersed in the pond (or other body of water).
  • treated water is pumped out of the reactor vessel 1 and the pond water flows into the vessel 1 through the apertures 3, 23 in the shell.
  • the size of the apertures 3, 23 is chosen to be smaller than the smallest cross sectional area of the biofilm carrier elements 6.
  • the apertures 23 in the lower wall 4 allow efficient draining of water from the reactor vessel 1 in the event that the pond is drained.
  • the spacer element 5 ensures that the lower wall 4 of the vessel 1 will remain elevated above the pond bottom, thus preventing the apertures 23 from being blocked by sediment.
  • the treatment section 30 of the reactor 1 is in fluid communication with an outlet section 40 and separated from the outlet section 40 by a screen 13.
  • the screen 13 is configured to allow flow of water therethrough, but to prevent the biofilm carrier elements 6 from escaping the treatment section 30 and flowing into the outlet section 40.
  • apertures in the screen 13 may have a width which is less than a smallest dimension of the biofilm carrier elements 6 (or of a smallest one of the biofilm carrier elements 6) so that the biofilm carrier elements 6 cannot fit through the apertures.
  • the treatment section 30 is substantially annular, and is arranged around the outlet section 40 which is substantially cylindrical by virtue of the cylindrical shape of the screen 13.
  • the treatment section 30 and the outlet section 40 could be arranged side-by- side, and separated by a substantially planar screen. It is particularly advantageous for the treatment section 30 to be concentric with the outlet section 40 as this allows for better flow characteristics within the treatment section 30 than a side-by-side arrangement.
  • the MBBR 00 has an agitator, comprising aeration pipes 7A and 7B, for imparting motion to the biofilm carrier elements 6 and in particular to maintain the reactor volume in constant motion, thoroughly mixing the media 6 inside the reactor volume and thereby maintaining good contact between the biofilm growing on the carriers 6 and the substrate in the pond water. Agitation maintains the media 6 in constant motion creating a scrubbing effect that prevents clogging and sloughs off excess biomass.
  • Two ring-shaped pipes 7A and 7B are shown in the Figures, but it will be appreciated that a single pipe may be used, or more than two pipes may be used.
  • Air supply to each pipe 7A, 7B is separately regulated by a respective valve 8A, 8B.
  • the valves 8A, 8B may be ball valves, for example.
  • a single valve may regulate supply to both pipes 7A, 7B but individual regulation is preferred as it allows more control over the air jets produced by the respective pipes 7A, 7B and thus the flow pattern within the treatment section 30.
  • the outlet portions may be at the same depth within the treatment section 30 or, as shown in Fig. 1 and Fig. 3, may be at different heights. In the depicted embodiment both outlet portions are located near the lower wall 4 of the reactor vessel 1 .
  • placement of the outlet portions near the lower wall 4 provides for better mixing and oxygenation due to the longer path length of air bubbles traversing the vessel 1 from near the vessel bottom 4.
  • the air jets injected by the outlet portions of the aeration pipes 7A and 7B cause agitation of the water in the treatment section 30.
  • the first ring 7A has a diameter slightly larger than the diameter of the cylindrical screen 13 so that air jets from the first ring 7A influence water near the centre of the treatment section 30, while the second ring 7B has a diameter slightly smaller than the diameter of the reactor vessel 1 such that air jets from the second ring 7B influence water near the perimeter of the treatment section 30.
  • This arrangement of rings 7A and 7B has been found to be optimal as allows for thorough mixing of the biofilter carrier elements 6 throughout the treatment section 30. However, other arrangements could also be used, for example a single ring arranged concentrically about the screen 13 and having a diameter approximately half the vessel diameter.
  • the air jets carry oxygen, which supports the aerobic biological process of nitrification in the bioreactor 100.
  • the aeration process makes correct adjustment between consumption and supply of oxygen possible.
  • the aeration pipes 7A and 7B simultaneously provide agitation and aeration.
  • the agitation and aeration functions could be provided by separate components.
  • aeration could be provided by air supplied at lower pressure through one or more pipes (which need not have ring-shaped outlet portions) while agitation could be performed by one or more separate agitation devices such as impellers and the like.
  • oxygen supply can be provided by use of technical oxygen gases, although use of air is preferred as it is cheaper and safer.
  • the MBBR 100 comprises a pumping system, in particular an airlift pumping system 9, comprising an airlift pipe 10 having one end disposed in the outlet section 40, near the lower wall 4 and just above the ring-shaped outlets of the aeration pipes 7A, 7B.
  • the airlift pipe 10 has a vertical section 10A disposed in the outlet section 40, the vertical section 10A being coupled to a horizontal section 10B having an outlet 12 disposed above a top of the reactor vessel 1 and positioned to expel treated water back into the pond as shown in Fig. 3.
  • An air inlet pipe 11 extends from a pressure source into the airlift pipe 10, via a standard connection, near a bend junction between the vertical section 10A and the horizontal section 10B.
  • a valve 8C such as a ball valve, of the air inlet pipe 11.
  • Pressurised air can be injected into the airlift pipe 10 to force treated water in the outlet section 40 to rise up the vertical section 10A of the airlift pipe 10 and be expelled through the outlet ⁇ 2 back into the pond such that the treated water is recirculated to the pond in a directed manner. Accordingly, a directed water flow into the pond is created, and pond water flows into the reactor through the apertures 3, 23 in the reactor body ensuring good contact between the biofilm growing on the carriers and the substrate in the pond water.
  • an airlift system to pump the treated water to the outlet 12, it is possible to use the same pressure source to simultaneously agitate/aerate and recirculate water. It will be appreciated, though, that in some embodiments separate pressure sources can supply the aeration pipes 7A, 7B on the one hand, and the airlift system 9 on the other hand. In other embodiments, an airlift system need not be used, and an alternative pumping system could be used to pump treated water from the outlet section 40 to the pond.
  • the flow capacity of the airlift system 9 essentially depends on the width of the vertical pipe 10A, the depth of the air inlet pipe 11 into the vertical section of the pipe 10A, and the pressure of the air flow.
  • the flow capacity of the airlift system 9 should be sufficient to achieve a retention time (in the reactor vessel 1 ) , of 5 to 10 minutes.
  • the flow rate of the air-lift system 9 can be adjusted by the volume of air introduced into the vertical pipe 10A of the airlift 9 by ball valve 8C in the aeration piping 11.
  • the pressure source used to supply the MBBR 100 for airlift and aeration operations may be provided by a blower, compressor or other similar air pressurisation device mounted on top of the reactor vessel , for example.
  • the air can be transported through an air hose from any aeration device that is located remotely from the reactor vessel 1 , for example a land-based aeration device next to the pond.
  • no electrical equipment is used at the reactor 100 in the pond.
  • FIG. 4 An exemplary water treatment process, which may use the MBBR 100, is illustrated in Fig. 4.
  • the reactor vessel 1 is immersed in a body of water, such as a pond, for example a pond in which shrimp are being bred, such that the treatment section 30 is in fluid communication with the pond water via apertures 3, 23.
  • the reactor vessel' 1 being buoyant, will float in the pond such that the outlet 12 is above water level. If necessary, the floating position of the bioreactor 100 can be stabilised, and the immersion depth chosen to achieve optimal reactor volume, by adding stabilising weights 14 to, or removing them from, the reactor vessel 1 after placing the reactor 1 in floating position in the pond - step 404.
  • biofilm carriers 6 are added to the treatment section 30.
  • the biofilm carriers 6 may already be present in the treatment section 30 prior to the vessel 1 being immersed in the pond.
  • step 408 the pressure source (compressor, blower, etc.) is activated and the aeration piping valves 8A, 8B and airlift system valve 8C are opened (steps 410, 412). This leads to agitation 414 of the biofilm carriers 6, and flow 416 of treated water from the treatment section 30 to the outlet section 40, as described above. The treated water can be pumped 418 from the outlet section 40 back to the pond. Typically, steps 414 to 4 8 are carried out continuously.
  • the materials for constructing the components of the MBBR 100 described above, including the body of the reactor vessel 1 and the piping 7A, 7B, 10A, 10B, 11, are preferably chosen to be safe and non-toxic to aquatic organisms and are preferably corrosion resistant.
  • examples of such materials include plastics, such as polyethylene, polypropylene, acrylic plastic or fiberglass reinforced plastic (FRP), or stainless steel.
  • the moving bed bioreactor of embodiments of the present invention is relatively compact relative to the pond or similar closed environments of water, is easy to use, needs very little maintenance and is unlikely to clog or overflow.
  • embodiments of the floating biofilter placed directly in a pond or water body with intensive aquaculture production can be used not only for nitrification, but may also be used for any purification technique based on biological degradation of a substance which is desired to be removed from the body of water.
  • embodiments of the invention can be used for the following:

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

Un bioréacteur à lit mobile comprend une cuve de réacteur présentant une section de traitement destinée à retenir une pluralité d'éléments de support de biofilm. Le bioréacteur à lit mobile comprend également un agitateur permettant de communiquer un mouvement aux éléments de support du biofilm. La cuve de réacteur est flottante et comprend au moins une paroi latérale et une paroi inférieure, ladite au moins une paroi latérale et/ou la paroi inférieure comportant une pluralité d'ouvertures pour permettre l'écoulement d'eau à l'intérieur et à l'extérieur de la chambre lorsque la cuve de réacteur est immergée dans un corps d'eau, chacune desdites ouvertures étant dimensionnée pour empêcher les éléments de support du biofilm de s'écouler hors de la cuve de réacteur.
PCT/SG2015/000107 2015-03-31 2015-03-31 Bioréacteur à lit mobile et procédé de traitement de l'eau WO2016159870A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
MYPI2017001364A MY184021A (en) 2015-03-31 2015-03-31 Moving bed bioreactor and water treatment process
PCT/SG2015/000107 WO2016159870A1 (fr) 2015-03-31 2015-03-31 Bioréacteur à lit mobile et procédé de traitement de l'eau
CN201580078384.1A CN107428576A (zh) 2015-03-31 2015-03-31 移动床生物反应器和水处理方法
SG11201703612XA SG11201703612XA (en) 2015-03-31 2015-03-31 Moving bed bioreactor and water treatment process

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PCT/SG2015/000107 WO2016159870A1 (fr) 2015-03-31 2015-03-31 Bioréacteur à lit mobile et procédé de traitement de l'eau

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MY (1) MY184021A (fr)
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CN106745709A (zh) * 2017-02-14 2017-05-31 许成玉 一种黑臭水体治理设备
CN113698049A (zh) * 2021-09-30 2021-11-26 江苏盛立环保工程有限公司 一种水冲粪、水泡粪养猪废水处理及回用工艺
CN114988562A (zh) * 2022-04-29 2022-09-02 重庆大学 污废水处理系统、生物反应池及池体

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CN114031174B (zh) * 2021-11-22 2022-10-28 广州市水之道生态环境修复有限公司 一种太阳能环流曝气悬浮型生物滤池

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