ES2328777B1 - BIODISC CLEANING PLANT. - Google Patents
BIODISC CLEANING PLANT. Download PDFInfo
- Publication number
- ES2328777B1 ES2328777B1 ES200800601A ES200800601A ES2328777B1 ES 2328777 B1 ES2328777 B1 ES 2328777B1 ES 200800601 A ES200800601 A ES 200800601A ES 200800601 A ES200800601 A ES 200800601A ES 2328777 B1 ES2328777 B1 ES 2328777B1
- Authority
- ES
- Spain
- Prior art keywords
- biodisc
- biodisks
- tanks
- oxygen
- treatment plant
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 238000004140 cleaning Methods 0.000 title 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 150000002823 nitrates Chemical class 0.000 claims abstract description 11
- 241000894006 Bacteria Species 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005273 aeration Methods 0.000 claims abstract description 7
- 230000007423 decrease Effects 0.000 claims abstract description 5
- 150000002826 nitrites Chemical class 0.000 claims abstract description 5
- 239000008213 purified water Substances 0.000 claims abstract description 5
- 239000000523 sample Substances 0.000 claims abstract description 5
- 230000003647 oxidation Effects 0.000 claims abstract description 4
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 238000010908 decantation Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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
-
- 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
Landscapes
- 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
Planta depuradora de biodiscos.Biodisc treatment plant.
A partir de un depurador de biodiscos (1) en el que cada biodisco se subdivide en dos cámaras o tanques (4), en los que se establece una entrada de vertido (5) y una salida (6) para el agua depurada, y donde los biodiscos (1) emergen sustancialmente de los tanques y son sometidos a un movimiento giratorio por medio de un moto-reductor (3), la invención consiste en disminuir sustancialmente la velocidad de giro de los discos (1), con el consecuente ahorro energético; sin alterar de modo significativo los rendimientos merced a la inclusión en el fondo de los tanques (4) de una aireación forzada a base de difusores (12) alimentados por un soplante (9), controlándose el nivel de oxígeno disuelto en los biodiscos mediante una sonda (14). Además entre las inmediaciones de la salida (6) de agua depurada y la zona de entrada (5) del vertido, se establece un conducto de recirculación (13) a través del que los nitratos y nitritos generados a la salida por las bacterias autótrofas son aportados a la entrada del biodisco, que es donde mayor es la oxidación, con lo que las citadas bacterias absorben los nitratos y liberan nitrógeno a la atmósfera.From a biodisc scrubber (1) in the that each biodisk is subdivided into two chambers or tanks (4), in the that a discharge input (5) and an output (6) are established for purified water, and where biodisks (1) emerge substantially of the tanks and are subjected to a rotating movement by of a motor reducer (3), the invention consists in substantially decrease the speed of rotation of the discs (1), with the consequent energy saving; without altering so significant returns due to inclusion in the fund of the tanks (4) of a forced aeration based on diffusers (12) powered by a blower (9), controlling the oxygen level dissolved in the biodisks by means of a probe (14). Also among the near the outlet (6) of purified water and the area of inlet (5) of the discharge, a recirculation duct is established (13) through which nitrates and nitrites generated on output by the autotrophic bacteria are contributed to the entrance of the biodisk, which is where the oxidation is greatest, so that cited bacteria absorb nitrates and release nitrogen to the atmosphere.
Description
Planta depuradora de biodiscos.Biodisc treatment plant.
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.
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.
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.
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.
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200800601A ES2328777B1 (en) | 2008-02-29 | 2008-02-29 | BIODISC CLEANING PLANT. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200800601A ES2328777B1 (en) | 2008-02-29 | 2008-02-29 | BIODISC CLEANING PLANT. |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2328777A1 ES2328777A1 (en) | 2009-11-17 |
ES2328777B1 true ES2328777B1 (en) | 2010-09-17 |
Family
ID=41258514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES200800601A Expired - Fee Related ES2328777B1 (en) | 2008-02-29 | 2008-02-29 | BIODISC CLEANING PLANT. |
Country Status (1)
Country | Link |
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ES (1) | ES2328777B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES1099707Y (en) * | 2013-12-20 | 2014-05-05 | Univ Madrid Politecnica | FOTOBIOR REACTOR FLOATING SUPPORT. |
ES2888223B2 (en) | 2021-10-04 | 2022-05-12 | Acai Depuracion Sl | COMBINED REACTOR FOR WATER PURIFICATION |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE328530B (en) * | 1965-11-04 | 1970-09-14 | H Hartmann | |
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 |
ES2161620B1 (en) * | 1999-08-27 | 2003-04-01 | Filtramas S A | DUAL NITRIFICATION-DESNITRIFICATION SYSTEM BY BIODISC. |
-
2008
- 2008-02-29 ES ES200800601A patent/ES2328777B1/en not_active Expired - Fee Related
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Publication number | Publication date |
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ES2328777A1 (en) | 2009-11-17 |
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