WO2007017529A1 - Micro-organism carrier for use in fluid-bed wastewater treatment plants - Google Patents

Micro-organism carrier for use in fluid-bed wastewater treatment plants Download PDF

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Publication number
WO2007017529A1
WO2007017529A1 PCT/ES2005/000455 ES2005000455W WO2007017529A1 WO 2007017529 A1 WO2007017529 A1 WO 2007017529A1 ES 2005000455 W ES2005000455 W ES 2005000455W WO 2007017529 A1 WO2007017529 A1 WO 2007017529A1
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WO
WIPO (PCT)
Prior art keywords
carrier
treatment plants
microorganisms
wastewater treatment
fluid bed
Prior art date
Application number
PCT/ES2005/000455
Other languages
Spanish (es)
French (fr)
Inventor
Cesar Menendez Fernandez
Francisco Ortega Fernandez
Gemma M. Martinez Huerta
Nieves Roqueñi Gutierrez
Valeriano Alvarez Cabal
Original Assignee
Universidad De Oviedo
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Application filed by Universidad De Oviedo filed Critical Universidad De Oviedo
Priority to PCT/ES2005/000455 priority Critical patent/WO2007017529A1/en
Publication of WO2007017529A1 publication Critical patent/WO2007017529A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
    • 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
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30223—Cylinder
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30257—Wire
    • B01J2219/30261—Wire twisted
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30257—Wire
    • B01J2219/30265—Spiral
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30296—Other shapes
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/304—Composition or microstructure of the elements
    • B01J2219/30466—Plastics
    • 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

  • the present invention relates to a carrier of microorganisms used to decompose the contaminating elements of wastewater that are introduced into a treatment plant.
  • the object of the invention is the development of a carrier of microorganisms of special geometry characterized by a large surface that favors the creation of a biofilm and facilitates the flow of water through and around the carrier to enhance the contact and decomposition of the contaminating elements. by the biofilm; Likewise, it must have the smallest possible surface of contact with other carriers to avoid the release of the biofilm.
  • the basic principle of the fluid bed process is based on the growth of biomass in plastic supports that move in a biological reactor by means of continuous agitation generated by aeration systems.
  • the biological reactor generally consists of the following elements:
  • the effluent is introduced into the reactor where microorganisms grow by forming an organic film in the carrier elements that float in the fluid. These microorganisms break down the contaminating elements.
  • the geometric design of the carrier is therefore essential to achieve an optimal transfer of the substrate and oxygen to the biological film, resulting in an essential factor for good system performance.
  • the oxygen required by the microorganisms is supplied by the injection of air in the form of bubbles from the bottom of the reactor.
  • the bubble flow agitates the mixture and allows the carrier elements to be in continuous motion.
  • the treated effluent leaves the reactor through a screen using an air pump that prevents foaming problems.
  • the carrier of microorganisms for use in wastewater treatment plants of fluid bed that constitutes the object of this invention stands out mainly for showing a helical cylindrical design.
  • This design is based on the incorporation of one or more helical fins attached to a cylindrical body that can be solid or hollow, the number of helical fins can vary between 1 and 6 depending on the passage of the number of fins.
  • the cylindrical body In the case that the cylindrical body is solid, it only serves as a structural support for the helical fins and its radius is minimal; In the case that it is hollow in addition to being used as a structural support, it also allows the creation of a biofilm on its inner surface.
  • the carrier will preferably have the hollow cylindrical body.
  • the carriers have a relationship between the surface and the high occupied volume which allows a biologically active surface for a given volume, this value is greater than 500 m 2 / m 3 .
  • the carriers introduced in the medium do not occupy it completely but have sufficient space in the medium to facilitate a constant movement that allows the optimal aeration of all the surfaces of the carrier, occupying a volume in the medium between 40 and 75% .
  • the carriers within the fluidized bed will be subjected to a continuous movement so that the deposits on the surface are eliminated and the clogging disappears.
  • the helical fins instead of the cylindrical body, constitute the contact surfaces with the fins corresponding to other carriers, thus protecting most of the cylindrical body where the bacteria grow, also these helical fins prevent the agglutination of carriers when collisions occur.
  • the percentage of emptiness is directly related to the price of the piece for which it is interesting to keep it as high as possible to reduce the cost of carrier. It is considered that the percentage of emptiness of the carrier with respect to the envelope volume is greater than 70%.
  • the hollow of the carrier has an adequate size to facilitate, not only the creation of the biofilm, but also the flow through it to favor contact and the decomposition of the elements contaminants by the biofilm, thus preventing the gaps from being occluded by suspended materials or by the growth of the biofilm itself, thus avoiding the appearance of blockages or depositions on the carrier that would reduce the biological contact surface.
  • the carrier's component materials have a density very close to that of the water, so that any ascending or sinking movement is minimized and the movements occur randomly induced by the injection of air in the middle.
  • the density of the material is between 0.9 and 1.2 Kg / dm 3 .
  • the design of the carrier will also take into consideration a sufficient mechanical strength to avoid deformation caused by stresses in the contact between carriers, especially during the filling and emptying of the tank.
  • the carriers are preferably designed in materials resistant to corrosion and chemical attack such as plastics, which may incorporate inhibitors to prevent degradation due to the effect of ultraviolet radiation and which must be inert for all types of bacteria, considering that the carriers they can be, for example, polypropylene or polyethylene.
  • the material immersed in water for long periods of time is resistant to the degradation of both light, chemical, aerobic or anaerobic, also to favor that bacteria are located and grow on the surface of the carrier the surface of it is hydrophilic.
  • Figure 1. Shows a perspective view of the carrier of microorganisms object of this invention in its hollow cylindrical configuration with three helical fins.
  • Figure 2.- Shows an elevation view of the microorganism carrier represented in the previous figure.
  • Figure 3. Shows a plan view of the same carrier of microorganisms.
  • the carrier of microorganisms for use in wastewater treatment plants of fluid bed that constitutes the object of this invention is represented in the figures according to a possible embodiment of the invention.
  • the carrier is of the type that shows a surface in which a biofilm grows to decompose the contaminant elements of the wastewater and basically comprises a cylindrical body (1) around which one or more helical fins are located (2), preferably from 1 to 6, contemplating for the case represented in the figures a hollow cylindrical body (1) with three helical fins (2).
  • the carrier comprising a hollow cylindrical body (1) has a relationship between the inner radius r of the cylindrical body (1) and the outer radius R of the helical fin (2) of less than 1, preferably between 0 and 0 , 6, showing in the case of the figures a ratio of 0.5.

Abstract

The invention relates to a micro-organism carrier for use in fluid-bed wastewater treatment plants. The inventive carrier comprises a preferably-hollow cylindrical body (1) with at least one helical flange (2) disposed therearound, which favours the creation of a biofilm and which facilitates the flow of water through and around the carrier in order to promote contact and the decomposition of the contaminant elements by the biofilm. In addition, the helical flanges (2) minimise the surface exposed to contact, thereby preventing the biofilm from detaching upon coming into contact with another carrier.

Description

PORTADOR DE MICROORGANISMOS PARA USO EN ESTACIONES DEPURADORAS DE AGUAS RESIDUALES DE LECHO FLUIDO MICROORGANISM CARRIER FOR USE IN FLUID MILK WATER RESIDUAL WATER STATIONS
D E S C R I P C I Ó ND E S C R I P C I Ó N
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La presente invención se refiere a un portador de microorganismos empleado para descomponer los elementos contaminantes de las aguas residuales que se introducen en una depuradora.The present invention relates to a carrier of microorganisms used to decompose the contaminating elements of wastewater that are introduced into a treatment plant.
Es objeto de Ia invención el desarrollo de un portador de microorganismos de especial geometría caracterizada por una gran superficie que favorezca Ia creación de una biopelícula y facilite el flujo de agua a través y en torno al portador para potenciar el contacto y descomposición de los elementos contaminantes por Ia biopelícula; asimismo deberá presentar Ia menor superficie posible de contacto con otros portadores para evitar el desprendimiento de Ia biopelícula.The object of the invention is the development of a carrier of microorganisms of special geometry characterized by a large surface that favors the creation of a biofilm and facilitates the flow of water through and around the carrier to enhance the contact and decomposition of the contaminating elements. by the biofilm; Likewise, it must have the smallest possible surface of contact with other carriers to avoid the release of the biofilm.
ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION
El principio básico del proceso de lecho fluido se basa en el crecimiento de Ia biomasa en soportes plásticos que se mueven en un reactor biológico mediante Ia agitación continua generada por sistemas de aireación.The basic principle of the fluid bed process is based on the growth of biomass in plastic supports that move in a biological reactor by means of continuous agitation generated by aeration systems.
El reactor biológico consta generalmente de los siguientes elementos:The biological reactor generally consists of the following elements:
- Lecho móvil con un medio portador - Dispositivo de aireación- Mobile bed with a carrier medium - Aeration device
- Bomba de impulsión de aire- Air supply pump
- Pantalla de separación- Separation screen
- Colector de agua tratada.- Treated water collector.
De acuerdo con esta tecnología el efluente es introducido en el reactor donde los microorganismos crecen formando una película orgánica en los elementos portadores que flotan en el fluido. Dichos microorganismos descomponen los elementos contaminantes.According to this technology, the effluent is introduced into the reactor where microorganisms grow by forming an organic film in the carrier elements that float in the fluid. These microorganisms break down the contaminating elements.
El diseño geométrico del portador resulta por tanto fundamental para conseguir una transferencia óptima del substrato y del oxígeno a Ia película biológica, resultando un factor esencial para un buen rendimiento del sistema.The geometric design of the carrier is therefore essential to achieve an optimal transfer of the substrate and oxygen to the biological film, resulting in an essential factor for good system performance.
El oxígeno que precisan los microorganismos se suministra mediante Ia inyección de aire en forma de burbujas desde el fondo del reactor. El flujo de burbujas agita Ia mezcla y permite que los elementos portadores estén en movimiento continuo.The oxygen required by the microorganisms is supplied by the injection of air in the form of bubbles from the bottom of the reactor. The bubble flow agitates the mixture and allows the carrier elements to be in continuous motion.
El efluente tratado abandona el reactor a través de una pantalla utilizando una bomba de aire que previene problemas de espumación.The treated effluent leaves the reactor through a screen using an air pump that prevents foaming problems.
En Ia Patente de Invención EP 0 575 314 se describe un "Método y reactor para Ia purificación de aguas" en el que el agua residual puede fluir a través de un reactor que contiene portadores en los que crece una biopelícula que promueve Ia conversión de impurezas, configurándose dichos portadores a partir de diversos materiales, habitualmente, pero no de forma exclusiva, plástico blando y opcionalmente plástico reciclado, en forma de trozos tubulares con paredes internas separadoras de acuerdo con unas características geométricas, dimensionales, de densidad y otros. Los portadores con biopelículas se mantienen suspendidos y se mueven en el agua en un reactor con entrada o salida que opcionalmente cuenta con elementos de mezclado, y donde los lodos que dejan el reactor no son retornados al reactor.In the Patent of Invention EP 0 575 314 a "Method and reactor for water purification" is described in which the wastewater can flow through a reactor containing carriers in which a biofilm that promotes the conversion of impurities grows , said carriers being configured from various materials, usually, but not exclusively, soft plastic and optionally recycled plastic, in the form of tubular pieces with internal separating walls according to geometric, dimensional, density and other characteristics. The carriers with biofilms are kept suspended and move in the water in a reactor with an inlet or outlet that optionally has mixing elements, and where the sludges that leave the reactor are not returned to the reactor.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
El portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido que constituye el objeto de esta invención destaca fundamentalmente por mostrar un diseño cilindrico helicoidal.The carrier of microorganisms for use in wastewater treatment plants of fluid bed that constitutes the object of this invention stands out mainly for showing a helical cylindrical design.
Este diseño está basado en Ia incorporación de una o más aletas helicoidales adosadas a un cuerpo cilindrico que puede ser macizo o hueco, el número de aletas helicoidales puede variar entre 1 y 6 dependiendo el paso del número de aletas.This design is based on the incorporation of one or more helical fins attached to a cylindrical body that can be solid or hollow, the number of helical fins can vary between 1 and 6 depending on the passage of the number of fins.
En el caso de que el cuerpo cilindrico sea macizo sólo sirve como soporte estructural de las aletas helicoidales y su radio es mínimo; en el caso de que sea hueco además de usarse como soporte estructural también permite Ia creación de una biopelícula en su superficie interior.In the case that the cylindrical body is solid, it only serves as a structural support for the helical fins and its radius is minimal; In the case that it is hollow in addition to being used as a structural support, it also allows the creation of a biofilm on its inner surface.
EI portador dispondrá preferentemente del cuerpo cilindrico hueco.The carrier will preferably have the hollow cylindrical body.
Los portadores presenta una relación entre Ia superficie y el volumen ocupado alta Io que permite contar con una superficie biológicamente activa para un volumen determinado, este valor es superior a 500 m2/m3.The carriers have a relationship between the surface and the high occupied volume which allows a biologically active surface for a given volume, this value is greater than 500 m 2 / m 3 .
Dispone asimismo una relación elevada entre Ia superficie real y Ia superficie equivalente de un portador macizo con el mismo volumen aparente o volumen ocupado con un valor de Ia superficie total mayor o igual a 1 ,5 veces Ia superficie envolvente del volumen.It also has a high relationship between the real surface and The equivalent surface of a solid carrier with the same apparent volume or occupied volume with a value of the total area greater than or equal to 1.5 times the volume enveloping surface.
Los portadores introducidos en el medio no Io ocupan totalmente sino que disponen de espacio suficiente en el medio para facilitar un movimiento constante que permita Ia aireación óptima de todas las superficies del portador, ocupando un volumen en el medio comprendido entre el 40 y el 75%. Los portadores dentro del lecho fluido estarán sometidos a un movimiento continuo de modo que los depósitos sobre Ia superficie sean eliminados y los taponamientos desaparezcan.The carriers introduced in the medium do not occupy it completely but have sufficient space in the medium to facilitate a constant movement that allows the optimal aeration of all the surfaces of the carrier, occupying a volume in the medium between 40 and 75% . The carriers within the fluidized bed will be subjected to a continuous movement so that the deposits on the surface are eliminated and the clogging disappears.
Los portadores en movimiento en el lecho contactan unos contra otros; por este motivo se ha previsto un diseño de los portadores que minimice el desprendimiento de las bacterias que crecen en su superficie.The bearers moving in bed contact each other; For this reason, a carrier design has been planned that minimizes the shedding of bacteria that grow on its surface.
En este caso las aletas helicoidales, en lugar del cuerpo cilindrico, constituyen las superficies de contacto con las aletas correspondientes a otros portadores quedando por tanto protegida Ia mayor parte del cuerpo cilindrico donde crecen las bacterias, asimismo estas aletas helicoidales evitan el aglutinamiento de portadores cuando se producen colisiones.In this case, the helical fins, instead of the cylindrical body, constitute the contact surfaces with the fins corresponding to other carriers, thus protecting most of the cylindrical body where the bacteria grow, also these helical fins prevent the agglutination of carriers when collisions occur.
Se considera que los portadores deberán incorporar parte de su superficie hueca para aumentar Ia superficie utilizando el mismo volumen de material, el porcentaje de vacuidad está directamente relacionado con el precio de Ia pieza por Io que interesa mantenerlo Io más elevado posible para reducir el coste del portador. Se considera que el porcentaje de vacuidad del portador respecto al volumen envolvente es superior al 70%.It is considered that the carriers must incorporate part of their hollow surface to increase the surface using the same volume of material, the percentage of emptiness is directly related to the price of the piece for which it is interesting to keep it as high as possible to reduce the cost of carrier. It is considered that the percentage of emptiness of the carrier with respect to the envelope volume is greater than 70%.
El hueco del portador dispone de un tamaño adecuado para facilitar, no sólo Ia creación de Ia biopelícula, sino también el flujo a través del mismo para favorecer el contacto y Ia descomposición de los elementos contaminantes por Ia biopelícula, evitando por tanto que los huecos sean ocluidos por materiales en suspensión o por el crecimiento de Ia propia biopelícula, se evita así Ia aparición de taponamientos o deposiciones sobre el portador que reduciría la superficie de contacto biológica.The hollow of the carrier has an adequate size to facilitate, not only the creation of the biofilm, but also the flow through it to favor contact and the decomposition of the elements contaminants by the biofilm, thus preventing the gaps from being occluded by suspended materials or by the growth of the biofilm itself, thus avoiding the appearance of blockages or depositions on the carrier that would reduce the biological contact surface.
Por otra parte para que se forme un lecho fluido resulta fundamental que los materiales componentes del portador tengan una densidad muy cercana a Ia del agua, de manera que se reduzca al máximo cualquier movimiento ascensional o de hundimiento y los movimientos se produzcan de forma aleatoria inducidos por Ia inyección de aire en el medio.On the other hand, for a fluid bed to form, it is essential that the carrier's component materials have a density very close to that of the water, so that any ascending or sinking movement is minimized and the movements occur randomly induced by the injection of air in the middle.
Se ha previsto que Ia densidad del material esté comprendida entre 0,9 y 1 ,2 Kg/dm3.It is expected that the density of the material is between 0.9 and 1.2 Kg / dm 3 .
Atendiendo las consideraciones geométricas descritas el diseño del portador tendrá asimismo en consideración una resistencia mecánica suficiente para evitar Ia deformación que puedan ocasionar los esfuerzos en el contacto entre portadores, en especial durante el proceso de llenado y vaciado del depósito.Taking into account the geometric considerations described, the design of the carrier will also take into consideration a sufficient mechanical strength to avoid deformation caused by stresses in the contact between carriers, especially during the filling and emptying of the tank.
Los portadores se diseñan preferentemente en materiales resistentes a Ia corrosión y al ataque químico como son los plásticos, que podrán incorporar inhibidores para evitar Ia degradación por el efecto de Ia radiación ultravioleta y que deberán ser inertes para todo tipo de bacterias, contemplándose que los portadores puedan ser, por ejemplo, polipropileno o polietileno. El material inmerso en agua durante largos períodos de tiempo es resistente a Ia degradación tanto lumínica, como química, aerobia o anaerobia, asimismo para favorecer que las bacterias se sitúen y crezcan sobre Ia superficie del portador Ia superficie de éste es hidrófila.The carriers are preferably designed in materials resistant to corrosion and chemical attack such as plastics, which may incorporate inhibitors to prevent degradation due to the effect of ultraviolet radiation and which must be inert for all types of bacteria, considering that the carriers they can be, for example, polypropylene or polyethylene. The material immersed in water for long periods of time is resistant to the degradation of both light, chemical, aerobic or anaerobic, also to favor that bacteria are located and grow on the surface of the carrier the surface of it is hydrophilic.
DESCRIPCIÓN DE LOS DIBUJOS Para complementar Ia descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de Ia invención, de acuerdo con un ejemplo preferente de realización práctica de Ia misma, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado Io siguiente:DESCRIPTION OF THE DRAWINGS To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. where, for the purposes of illustration and not limitation, the following has been represented:
Figura 1.- Muestra una vista en perspectiva del portador de microorganismos objeto de esta invención en su configuración cilindrico hueca con tres aletas helicoidales.Figure 1.- Shows a perspective view of the carrier of microorganisms object of this invention in its hollow cylindrical configuration with three helical fins.
Figura 2.- Muestra una vista en alzado del portador de microorganismos representado en Ia figura anterior.Figure 2.- Shows an elevation view of the microorganism carrier represented in the previous figure.
Figura 3.- Muestra una vista en planta del mismo portador de microorganismos.Figure 3.- Shows a plan view of the same carrier of microorganisms.
REALIZACIÓN PREFERENTE DE LA INVENCIÓNPREFERRED EMBODIMENT OF THE INVENTION
El portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido que constituye el objeto de esta invención aparece representado en las figuras de acuerdo con una posible realización de Ia invención.The carrier of microorganisms for use in wastewater treatment plants of fluid bed that constitutes the object of this invention is represented in the figures according to a possible embodiment of the invention.
De modo general el portador es del tipo de los que muestran una superficie en Ia que crece una biopelícula para descomposición de los elementos contaminantes de las aguas residuales y comprende fundamentalmente un cuerpo cilindrico (1 ) en torno al cual se encuentran una o más aletas helicoidales (2), preferentemente de 1 a 6, contemplándose para el caso representado en las figuras un cuerpo cilindrico (1 ) hueco con tres aletas helicoidales (2). La longitud del portador a viene definida en función del paso de Ia hélice de Ia aleta helicoidal (2), en general entre 0,5 y 2 veces el paso de Ia hélice, en el caso particular representado Ia longitud coincide con el paso de Ia hélice y muestra un valor de a = 0,9 cm.In general, the carrier is of the type that shows a surface in which a biofilm grows to decompose the contaminant elements of the wastewater and basically comprises a cylindrical body (1) around which one or more helical fins are located (2), preferably from 1 to 6, contemplating for the case represented in the figures a hollow cylindrical body (1) with three helical fins (2). The length of the carrier a is defined as a function of the passage of the helix of the helical fin (2), in general between 0.5 and 2 times the passage of the helix, in the particular case represented the length coincides with the passage of the Ia propeller and shows a value of a = 0.9 cm.
Por otra parte el portador que comprende un cuerpo cilindrico (1 ) hueco dispone de un relación entre el radio interior r del cuerpo cilindrico (1 ) y el radio exterior R de Ia aleta helicoidal (2) inferior a 1 , preferentemente entre 0 y 0,6, mostrando en el caso de las figuras una relación de 0,5.On the other hand, the carrier comprising a hollow cylindrical body (1) has a relationship between the inner radius r of the cylindrical body (1) and the outer radius R of the helical fin (2) of less than 1, preferably between 0 and 0 , 6, showing in the case of the figures a ratio of 0.5.
Se han obtenido como parámetros geométricos óptimos para Ia solución de cuerpo cilindrico hueco (1 ) los que a continuación se describen:Optimum geometric parameters have been obtained for the hollow cylindrical body solution (1) which are described below:
- Relación entre Ia superficie del portador y Ia envolvente de su volumen superior a 500 m2/m3.- Relationship between the surface of the carrier and the envelope of its volume greater than 500 m2 / m3.
- Porcentaje de vacuidad del portador respecto a Ia envolvente del volumen del portador superior al 70%.- Percentage of carrier voidness with respect to the envelope of the carrier volume greater than 70%.
- Superficie del portador superior a 1 ,5 veces Ia superficie simple de Ia envolvente del volumen. - Carrier surface area greater than 1.5 times the simple surface of the volume envelope.

Claims

R E I V I N D I C A C I O N E S
1.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido del tipo de los que muestran una superficie en Ia que crece una biopelícula para descomposición de los elementos contaminantes de las aguas residuales caracterizado porque comprende un cuerpo cilindrico (1 ) en torno al cual se encuentra al menos una aleta helicoidal (2), preferentemente entre 1 y 6 aletas.1.- Carrier of microorganisms for use in sewage treatment plants of fluid bed of the type that show a surface in which a biofilm grows for the decomposition of the pollutants of wastewater characterized by comprising a cylindrical body (1) around which at least one helical fin (2) is found, preferably between 1 and 6 fins.
2.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido según reivindicación 1 caracterizado porque su longitud a está comprendida entre 0,5 y 2 veces el paso de Ia hélice de Ia aleta helicoidal (2).2. Carrier of microorganisms for use in sewage treatment plants of fluid bed according to claim 1 characterized in that its length is between 0.5 and 2 times the passage of the helix of the helical fin (2).
3.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido según reivindicaciones anteriores caracterizado porque Ia relación entre Ia superficie del portador y Ia envolvente de su volumen es superior a 500 m2/m3.3.- Carrier of microorganisms for use in wastewater treatment plants of fluid bed according to previous claims characterized in that the ratio between the surface of the carrier and the envelope of its volume is greater than 500 m2 / m3.
4.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido según reivindicaciones anteriores caracterizado porque el porcentaje de vacuidad del portador respecto a Ia envolvente del volumen del portador es superior al 70%.4.- Carrier of microorganisms for use in sewage treatment plants of fluid bed according to previous claims characterized in that the percentage of carrier voidness with respect to the envelope of the carrier volume is greater than 70%.
5.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido según reivindicaciones 3 a 6 caracterizado porque su superficie es superior a 1 ,5 veces Ia superficie simple de Ia envolvente del volumen del portador.5.- Carrier of microorganisms for use in wastewater treatment plants of fluid bed according to claims 3 to 6 characterized in that its surface is greater than 1.5 times the simple surface of the envelope of the volume of the carrier.
6.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido según reivindicaciones anteriores caracterizado porque el cuerpo cilindrico (1 ) es hueco.6.- Carrier of microorganisms for use in wastewater treatment plants of fluid bed according to previous claims characterized in that the cylindrical body (1) is hollow.
7.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido según reivindicaciones anteriores caracterizado porque Ia relación entre el radio interior r del cuerpo cilindrico7. Carrier of microorganisms for use in wastewater treatment plants of fluid bed according to previous claims characterized in that the relationship between the inner radius r of the cylindrical body
(1) y el radio exterior R de Ia aleta helicoidal (2) es inferior a 1 , preferentemente comprendida entre 0 y 0,6.(1) and the outer radius R of the helical fin (2) is less than 1, preferably between 0 and 0.6.
8.- Portador de microorganismos para uso en estaciones depuradoras de aguas residuales de lecho fluido según reivindicaciones 1 a 5 caracterizado porque el cuerpo cilindrico (1 ) es macizo. 8. Carrier of microorganisms for use in wastewater treatment plants of fluid bed according to claims 1 to 5 characterized in that the cylindrical body (1) is solid.
PCT/ES2005/000455 2005-08-09 2005-08-09 Micro-organism carrier for use in fluid-bed wastewater treatment plants WO2007017529A1 (en)

Priority Applications (1)

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PCT/ES2005/000455 WO2007017529A1 (en) 2005-08-09 2005-08-09 Micro-organism carrier for use in fluid-bed wastewater treatment plants

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Application Number Priority Date Filing Date Title
PCT/ES2005/000455 WO2007017529A1 (en) 2005-08-09 2005-08-09 Micro-organism carrier for use in fluid-bed wastewater treatment plants

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2489036A (en) * 2011-03-17 2012-09-19 Biomatrix Water Technology Llp Attached growth media element for water treatment

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JPS6236190A (en) * 1985-08-09 1987-02-17 Morito Hasegawa Tape-shaped microorganism carrier
EP0731062A2 (en) * 1995-03-09 1996-09-11 Mass Transfer International Ltd. Packing elements
ES2135718T3 (en) * 1994-03-16 1999-11-01 Anox Biosystem Ab BIOFILM SUPPORT FOR WATER AND WASTE PURIFICATION.
DE20210697U1 (en) * 2002-07-03 2002-10-17 Stoehr Arno Filler and / or fouling body made of plastic
JP2003055562A (en) * 2001-08-14 2003-02-26 Daicel Novafoam Ltd Extruded molding and method for producing the same
US20030127378A1 (en) * 2002-01-07 2003-07-10 Aqwise Wise Water Technologies Ltd. Biofilm carrier, method of manufacture thereof and waste water treatment system employing biofilm carrier
US20040182762A1 (en) * 2003-03-18 2004-09-23 Acqua Minerale S. Benedetto S.P.A. Carrier for biofilm to be used in wastewater purification plants

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236190A (en) * 1985-08-09 1987-02-17 Morito Hasegawa Tape-shaped microorganism carrier
ES2135718T3 (en) * 1994-03-16 1999-11-01 Anox Biosystem Ab BIOFILM SUPPORT FOR WATER AND WASTE PURIFICATION.
EP0731062A2 (en) * 1995-03-09 1996-09-11 Mass Transfer International Ltd. Packing elements
JP2003055562A (en) * 2001-08-14 2003-02-26 Daicel Novafoam Ltd Extruded molding and method for producing the same
US20030127378A1 (en) * 2002-01-07 2003-07-10 Aqwise Wise Water Technologies Ltd. Biofilm carrier, method of manufacture thereof and waste water treatment system employing biofilm carrier
DE20210697U1 (en) * 2002-07-03 2002-10-17 Stoehr Arno Filler and / or fouling body made of plastic
US20040182762A1 (en) * 2003-03-18 2004-09-23 Acqua Minerale S. Benedetto S.P.A. Carrier for biofilm to be used in wastewater purification plants

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2489036A (en) * 2011-03-17 2012-09-19 Biomatrix Water Technology Llp Attached growth media element for water treatment
GB2489036B (en) * 2011-03-17 2015-10-14 Biomatrix Water Technology Llp Attached growth media element

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