ES2328777A1 - Biodiscan purification plant (Machine-translation by Google Translate, not legally binding) - Google Patents

Biodiscan purification plant (Machine-translation by Google Translate, not legally binding) Download PDF

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Publication number
ES2328777A1
ES2328777A1 ES200800601A ES200800601A ES2328777A1 ES 2328777 A1 ES2328777 A1 ES 2328777A1 ES 200800601 A ES200800601 A ES 200800601A ES 200800601 A ES200800601 A ES 200800601A ES 2328777 A1 ES2328777 A1 ES 2328777A1
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Prior art keywords
biodisks
biodisc
tanks
oxygen
treatment plant
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Granted
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ES200800601A
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Spanish (es)
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ES2328777B1 (en
Inventor
Sergio Fernandez De La Cruz Luis
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Filtramas S A
FILTRAMAS SA
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Filtramas S A
FILTRAMAS SA
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/08—Aerobic processes using moving contact bodies
    • 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)
  • 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)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

From a biodiscs debugger (1) in which each biodisk is subdivided into two chambers or tanks (4), in which a discharge inlet (5) and an outlet (6) are established for the purified water, and where the biodisks (1) emerge substantially from the tanks and are subjected to a rotary movement by means of a motor-reducer (3), the invention consists of substantially decreasing the speed of rotation of the disks (1), with the consequent saving energetic; without significantly altering the performances thanks to the inclusion in the bottom of the tanks (4) of a forced aeration based on diffusers (12) fed by a blower (9), controlling the level of dissolved oxygen in the biodisks by means of a probe (14). In addition, between the vicinity of the outlet (6) of purified water and the entrance area (5) of the spill, a recirculation duct (13) is established through which the nitrates and nitrites generated at the exit by the autotrophic bacteria are contributed to the entrance of the biodisco, which is where oxidation is greatest, which means that the aforementioned bacteria absorb nitrates and release nitrogen into the atmosphere. (Machine-translation by Google Translate, not legally binding)

Description

Planta depuradora de biodiscos.Biodisc treatment plant.

Objeto de la invenciónObject of the invention

La presente invención se refiere a una planta depuradora del tipo de las que cuentan con contactores biológicos rotativos, los comúnmente denominados biodiscos, con proceso de nitrificación-desnitrificación.The present invention relates to a plant treatment plant of the type with biological contactors rotary, the commonly called biodisks, with the process of nitrification-denitrification.

El objeto de la invención es mejorar el rendimiento del proceso paralelamente a un ahorro energético debido a la necesidad de utilización de una potencia menor para accionamiento de los biodiscos.The object of the invention is to improve the process performance in parallel to energy savings due to the need to use a lower power to Biodisc drive.

Esto se consigue mediante una menor velocidad en los biodiscos la división de cada uno de ellos en dos cámaras, un efecto de recirculación una aireación forzada en la parte sumergida.This is achieved by lower speed in the biodisks the division of each of them into two chambers, a recirculation effect a forced aeration in the part submerged

La invención resulta de especial aplicación en la depuración biológica de aguas residuales de vertidos biodegradables en los que existen contaminantes orgánicos solubles, no separables mediante procedimientos físicos tales como flotación. decantación o filtración.The invention is of special application in the biological purification of wastewater from discharges biodegradable in which there are soluble organic pollutants, not separable by physical procedures such as flotation. decantation or filtration.

Antecedentes de la invenciónBackground of the invention

Como es sabido, los contactores biológicos rotativos comúnmente denominados biodiscos, biocilindros o RBC, consisten básicamente en tambores o cilindros poblados de superficies, que giran semi-sumergidos en un tanque contenedor del agua residual, de manera que las citadas superficies de los biodiscos se exponen alternativamente al aire atmosférico y al vertido, generándose una biopelícula de bacterias aerobias que consumen oxígeno para realizar sus funciones vitales, pudiendo convertir el oxígeno consumido en nitratos. Paralelamente existen bacterias nitrificantes capaces de oxidar el amoniaco transformándolo en nitritos/nitratos.As is known, biological contactors Rotary commonly called biodisks, biocylinders or RBC, basically consist of drums or cylinders populated with surfaces, which rotate semi-submerged in a tank wastewater container, so that the aforementioned surfaces of the biodisks are exposed alternately to atmospheric air and to the spill, generating a biofilm of aerobic bacteria that they consume oxygen to perform their vital functions, being able to convert the oxygen consumed into nitrates. In parallel there are nitrifying bacteria capable of oxidizing ammonia transforming it into nitrites / nitrates.

La propia solicitante es titular de la Patente de Invención con número de solicitud P 9901952, en la que se describe un sistema dual de nitrificación-desnitrificación mediante biodiscos, basado en la utilización de dos tanques paralelos e intercomunicados, en los que se alojan respectivos biodiscos o contactores biológicos rotativos, a los que se dota de diferentes velocidades y sentido de giro, cambiante con el tiempo, sistema que permite conseguir unos buenos resultados en la nitrificación/desnitrificación.The applicant herself owns the patent of Invention with application number P 9901952, in which describes a dual system of nitrification-denitrification by biodisks, based on the use of two parallel tanks and intercommunicated, in which respective biodisks are housed or rotary biological contactors, which are endowed with different speeds and direction of rotation, changing over time, system that allows to achieve good results in the nitrification / denitrification.

No obstante y como se verá seguidamente, el rendimiento del sistema es susceptible de ser mejorado, y ello paralelamente a una disminución en el consumo de energía.However, as will be seen below, the system performance is likely to be improved, and that parallel to a decrease in energy consumption.

Descripción de la invenciónDescription of the invention

La planta depuradora de biodiscos que la invención propone ha sido concebida y estructurada en orden a conseguir esta mejora en el rendimiento del sistema, en base a las siguientes características:The biodisc treatment plant that the proposed invention has been conceived and structured in order to achieve this improvement in system performance, based on the following features:

--
Reducción de la velocidad de giro de los biodiscos, puesto que la cinética bacteriana es lenta, por lo que el agua que moja los discos sometidos a la atmósfera tarda varios minutos en ser depurada.Reduce the speed of rotation of the biodisks, since bacterial kinetics is slow, so the water that wets the disks subjected to the atmosphere takes several minutes to be purified.

--
La velocidad de giro se disminuye en un rango de 0,016 a 0,32 revoluciones/minuto para poder generar en el tanque del biodisco condiciones de falta de oxígeno, dado que en los biodiscos convencionales el oxígeno de la fase sumergida se genera por el chorreo de agua saturada desde la zona en contacto con la atmósfera. Esto supone una disminución proporcional en la potencia del accionamiento utilizado, con el consiguiente ahorro energético.The turning speed is decreased in a range of 0.016 to 0.32 revolutions / minute to generate in the biodisk tank conditions of lack of oxygen, since in the biodisks Conventional submerged phase oxygen is generated by the saturated water blasting from the area in contact with the atmosphere. This implies a proportional decrease in power of the drive used, with the consequent saving energetic.

--
De acuerdo con otra de las características de la invención y para asegurar el aporte de oxígeno bajo las condiciones reflejadas en el párrafo anterior, se instala bajo los discos una parrilla de difusores, que ha de cubrir las necesidades normales de oxígeno.From according to another feature of the invention and for ensure oxygen supply under the conditions reflected in the previous paragraph, a grill of diffusers, which must meet the normal needs of oxygen.

Transcurrido el tiempo suficiente, comienzan a desarrollarse bacterias autótrofas capaces de oxidar el amoniaco. Estás bacterias son propias de agua limpia, por lo que predominarán a la salida del biodisco.After the long enough, autotrophic bacteria begin to develop able to oxidize ammonia. These bacteria are own water clean, so they will predominate at the exit of the biodisk.

--
Igualmente se ha previsto la recirculación a cabecera, con lo que se consigue aportar nitratos y nitritos en la entrada de los biodiscos, que es donde mayor es la oxidación. Con ello, las bacterias absorberán estos nitratos y liberarán nitrógeno a la atmósfera.Likewise, the header recirculation, which is achieved by providing nitrates and nitrites at the entrance of the biodisks, which is where the greater the oxidation. With this, the bacteria will absorb these nitrates and They will release nitrogen into the atmosphere.

--
Finalmente y de acuerdo con otra de las características de la invención, se ha previsto un control del oxígeno disuelto en el biodisco, mediante una sonda, de modo que el valor registrado oscile entre 0 y 0,5 mg/l, interrumpiendo la aireación y forzando la asimilación de nitratos.Finally and according to another of the characteristics of the invention, a control of the oxygen dissolved in the biodisk, using a probe, so that the recorded value ranges between 0 and 0.5 mg / l, interrupting the aeration and forcing the assimilation of nitrates.
Descripción de los dibujosDescription of the drawings

Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características del invento de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un único dibujo en donde con carácter ilustrativo y no limitativo, se ha representado esquemáticamente una planta depuradora de biodiscos realizada de acuerdo con el objeto de la presente invención.To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention according to a preferred example of practical realization of it, is accompanied as an integral part of said description, a single drawing where with character illustrative and not limiting, it has been schematically represented a biodisc treatment plant made in accordance with the object of the present invention.

Realización preferente de la invenciónPreferred Embodiment of the Invention

En la figura reseñada puede observarse como, de forma convencional, en la planta depuradora participa una serie de biodiscos (1) montados sobre un árbol horizontal (2) y accionados por un moto-reductor (3), quedando dichos biodiscos (1) parcialmente sumergidos en el seno de tanques (4) en los que se establece una entrada (5) para los vertidos y una salida (6) para el agua depurada, situándose inmediatamente antes de dicha salida (6) una estación (7) de decantación o filtración con la correspondiente purga de fangos (8).In the review figure it can be seen how, from conventionally, a series of biodisks (1) mounted on a horizontal tree (2) and driven by a motor-reducer (3), said biodisks remaining (1) partially submerged in tanks (4) in which establishes an input (5) for spills and an output (6) for the purified water, standing immediately before said exit (6) a decantation or filtration station (7) with the corresponding sludge purge (8).

Pues bien, a partir de esta estructuración básica y de acuerdo con la invención, la planta incorpora un soplante (9) que a través de conducciones (10), preferentemente asistidas por electroválvulas (11), suministra aire a presión a difusores (12) existentes en el fondo de los tanques (4), generando en los mismos una aireación forzada que asegura el aporte de oxígeno necesario en estas zonas sumergidas.Well, from this structuring basic and according to the invention, the plant incorporates a blower (9) than through conduits (10), preferably assisted by solenoid valves (11), supplies pressurized air to diffusers (12) existing in the bottom of the tanks (4), generating in them a forced aeration that ensures the oxygen supply  necessary in these submerged areas.

Complementariamente se ha previsto la existencia de un conducto de recirculación (13) que conecta la salida del último tanque (4) con la zona de entrada del primero, como se observa perfectamente en la figura, de manera que las bacterias autótrofas que tienden a predominar a la salida de los biodiscos (1) son transportadas a la cabecera de la planta, consiguiéndose además aportar nitratos y nitritos en la entrada de los biodiscos (1), que es donde mayor es la oxidación y donde, como anteriormente se ha dicho, las citadas bacterias absorberán los nitratos y liberarán nitrógeno a la atmósfera.In addition the existence is planned of a recirculation duct (13) that connects the outlet of the last tank (4) with the entrance area of the first, as observe perfectly in the figure, so that the bacteria autotrophs that tend to predominate at the exit of biodisks (1) they are transported to the head of the plant, getting also provide nitrates and nitrites at the entrance of the biodisks (1), which is where the oxidation is greatest and where, as before it has been said, the said bacteria will absorb the nitrates and They will release nitrogen into the atmosphere.

La sonda (14) de oxígeno, situada en el seno de los tanques (4), permite controlar el oxígeno disuelto en los biodiscos de modo que el valor del mismo esté comprendido entre 0 y 0,5 mg/l, interrumpiendo la aireación y forzando la asimilación de nitratos cuando sea necesario.The oxygen probe (14), located within the tanks (4), allows to control the dissolved oxygen in the biodisks so that its value is between 0 and 0.5 mg / l, interrupting aeration and forcing the assimilation of nitrates when necessary.

Solo resta señalar por último que, como ya se ha dicho con anterioridad, la velocidad de giro suministrado a los biodiscos (1) por el motor reductor (3) se disminuye sustancialmente frente a las clásicas 1-2 rpm, concretamente en un rango de 0,016 a 0,32 con la finalidad también citada de generar en el tanque del biodisco condiciones de falta de oxígeno.It only remains to point out finally that, as has already been said before, the speed of rotation supplied to biodisks (1) by the reducing motor (3) is decreased substantially compared to the classic 1-2 rpm, specifically in a range of 0.016 to 0.32 for the purpose also cited to generate conditions of lack of oxygen.

Claims (5)

1. Planta depuradora de biodiscos, del tipo de las que llevan a cabo un proceso de nitrificación/desnitrificación y en las que los biodiscos (1) giran en el seno de tanques (4), en los que quedan parcialmente sumergidos, por efecto de un moto-reductor (3), estando dichos tanques (4) intercomunicados de manera que definen un conjunto en el que se establece una entrada (5) para el vertido y una salida (6) para el agua depurada, caracterizada porque la velocidad de giro de los biodiscos (1) disminuye hasta generar en el tanque del biodisco condiciones de falta de oxígeno, que se compensa mediante aireación forzada en el seno del líquido, estableciéndose a la salida de la planta, inmediatamente antes de la salida de agua depurada, un conducto (13) de recirculación hacia la cabecera o entrada (5), e incorporando los tanques (4) al menos una sonda de control de oxígeno disuelto en el biodisco.1. Biodisc treatment plant, of the type that carries out a nitrification / denitrification process and in which the biodisks (1) turn in tanks (4), in which they are partially submerged, as a result of a moto-reducer (3), said tanks (4) being interconnected so that they define an assembly in which an inlet (5) for the discharge and an outlet (6) for the purified water is established, characterized in that the speed of Turning of the biodisks (1) decreases until generating in the biodisk tank conditions of lack of oxygen, which is compensated by forced aeration within the liquid, establishing itself at the exit of the plant, immediately before the exit of purified water, a recirculation conduit (13) towards the head or inlet (5), and incorporating the tanks (4) at least one oxygen control probe dissolved in the biodisc. 2. Planta depuradora de biodiscos, según reivindicación 1ª, caracterizada porque la velocidad de giro de los biodiscos (1) disminuye a un rango de 0,016 a 0,32 rpm para poder generar en el tanque de biodiscos las citadas condiciones de falta de oxígeno.2. Biodisc treatment plant, according to claim 1, characterized in that the speed of rotation of the biodisks (1) decreases to a range of 0.016 to 0.32 rpm in order to generate the said conditions of lack of oxygen in the biodisks tank. 3. Planta depuradora de biodiscos, según reivindicación 1ª, caracterizada porque la aireación forzada se lleva a cabo mediante la instalación bajo los biodiscos (1) de difusores (12) para el aire generado por un soplante (9), preferentemente a través de electroválvulas (11).3. Biodisc treatment plant, according to claim 1, characterized in that the forced aeration is carried out by installing under the biodisks (1) of diffusers (12) for the air generated by a blower (9), preferably through solenoid valves (eleven). 4. Planta depuradora de biodiscos, según reivindicación 1ª, caracterizada porque a través del conducto de recirculación (13) las bacterias autótrofas capaces de oxidar el amoniaco que se desarrollan en la zona de salida, generan nitratos y nitritos que son desplazados hacia la entrada del biodisco, es decir a la zona de mayor oxidación.4. Biodisc treatment plant, according to claim 1, characterized in that through the recirculation duct (13) the autotrophic bacteria capable of oxidizing the ammonia that develop in the exit zone, generate nitrates and nitrites that are displaced towards the entrance of the biodisco, that is to the zone of greater oxidation. 5. Planta depuradora de biodiscos, según reivindicación 1ª, caracterizada porque con el concurso de una sonda o controlador de oxígeno disuelto en el biodisco, se controla un valor para dicho oxígeno comprendido entre 0 y 0,5 mg/l.5. Biodisc treatment plant, according to claim 1, characterized in that with the contest of an oxygen probe or controller dissolved in the biodisk, a value for said oxygen between 0 and 0.5 mg / l is controlled.
ES200800601A 2008-02-29 2008-02-29 BIODISC CLEANING PLANT. Expired - Fee Related ES2328777B1 (en)

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ES200800601A ES2328777B1 (en) 2008-02-29 2008-02-29 BIODISC CLEANING PLANT.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015092093A1 (en) * 2013-12-20 2015-06-25 Universidad Politécnica de Madrid Photobioreactor with a floating support
EP4159691A1 (en) 2021-10-04 2023-04-05 Acai Depuracion S.L. Combined reactor for wastewater treatment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389798A (en) * 1965-11-04 1968-06-25 Hartmann Hans Apparatus for the biological purification of waste water
US3817857A (en) * 1972-09-29 1974-06-18 Autotrol Corp Treatment of wastewater
US3871999A (en) * 1973-03-05 1975-03-18 Autotrol Corp Removal of pollutants from waste-water
JPS58128190A (en) * 1982-01-23 1983-07-30 Agency Of Ind Science & Technol Treatment of waste water
ES2161620A1 (en) * 1999-08-27 2001-12-01 Filtramas S A Nitrification and denitrification system for waste water consists of two parallel intercommunicating tanks housing opposed rotation discs of adjustable speed

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389798A (en) * 1965-11-04 1968-06-25 Hartmann Hans Apparatus for the biological purification of waste water
US3817857A (en) * 1972-09-29 1974-06-18 Autotrol Corp Treatment of wastewater
US3871999A (en) * 1973-03-05 1975-03-18 Autotrol Corp Removal of pollutants from waste-water
JPS58128190A (en) * 1982-01-23 1983-07-30 Agency Of Ind Science & Technol Treatment of waste water
ES2161620A1 (en) * 1999-08-27 2001-12-01 Filtramas S A Nitrification and denitrification system for waste water consists of two parallel intercommunicating tanks housing opposed rotation discs of adjustable speed

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
[en línea] recuperado de [WPI/Thompson] & JP 58128190 A (KOGYO GIJUTSUIN) 30.07.1983, resumen *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015092093A1 (en) * 2013-12-20 2015-06-25 Universidad Politécnica de Madrid Photobioreactor with a floating support
EP4159691A1 (en) 2021-10-04 2023-04-05 Acai Depuracion S.L. Combined reactor for wastewater treatment

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