ES2263378A1 - Degradation of organic matter by activated sludge process with high biomass concentrations and low sludge production - Google Patents
Degradation of organic matter by activated sludge process with high biomass concentrations and low sludge productionInfo
- Publication number
- ES2263378A1 ES2263378A1 ES200500986A ES200500986A ES2263378A1 ES 2263378 A1 ES2263378 A1 ES 2263378A1 ES 200500986 A ES200500986 A ES 200500986A ES 200500986 A ES200500986 A ES 200500986A ES 2263378 A1 ES2263378 A1 ES 2263378A1
- Authority
- ES
- Spain
- Prior art keywords
- sludge
- density
- organic matter
- degradation
- activated sludge
- 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.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 14
- 239000002028 Biomass Substances 0.000 title claims abstract description 9
- 239000005416 organic matter Substances 0.000 title claims abstract description 9
- 230000015556 catabolic process Effects 0.000 title claims abstract description 5
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 3
- 229960000892 attapulgite Drugs 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052625 palygorskite Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000004113 Sepiolite Substances 0.000 abstract 1
- 239000004927 clay Substances 0.000 abstract 1
- 230000031852 maintenance of location in cell Effects 0.000 abstract 1
- 229910052624 sepiolite Inorganic materials 0.000 abstract 1
- 235000019355 sepiolite Nutrition 0.000 abstract 1
- 230000001580 bacterial effect Effects 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000029087 digestion Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 208000035404 Autolysis Diseases 0.000 description 1
- 206010057248 Cell death Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000002650 habitual effect Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229910052615 phyllosilicate Inorganic materials 0.000 description 1
- -1 pirophylita Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000028043 self proteolysis Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- Treatment Of Sludge (AREA)
Abstract
Description
Método para degradación de materia orgánica mediante proceso de fangos activados con elevadas concentraciones de biomasa y baja producción de lodos.Method for degradation of organic matter through activated sludge process with high concentrations of biomass and low sludge production.
Esta invención se refiere como su titulo indica a un método para degradación de materia orgánica mediante proceso de fangos activados con elevadas concentraciones de biomasa y baja producción de lodos.This invention is referred to as its title indicates to a method for degradation of organic matter by process of activated sludge with high concentrations of biomass and low sludge production
Los vertidos industriales y domésticos han de ser sometidos a un proceso de depuración a fin de reducir la facción orgánica, la facción nitrogenada y los compuestos de fósforo. De la facción orgánica cabría distinguir aquella que es biodegradable de aquella que se degrada muy lentamente, así en general se establece que cuando la relación entre la Demanda Bioquímica de oxígeno y la Demanda química de oxígeno mantiene un valor inferior a 0,3, la materia orgánica es lentamente biodegradable.Industrial and domestic discharges must undergo a debugging process in order to reduce the organic faction, nitrogenous faction and compounds of match. From the organic faction one could distinguish that which is biodegradable of the one that degrades very slowly, thus in It is generally established that when the relationship between the Demand Oxygen biochemistry and chemical oxygen demand maintains a value less than 0.3, organic matter is slowly biodegradable.
En general los vertidos se tratan en sistemas denominados de "fangos activados", formados por los siguientes elementos: rejas de desbaste, desarenador-desengrasador, decantador primario, reactor biológico y decantador secundario. La esencia de los procesos de fangos activados es la capacidad de las poblaciones de microorganismos de formar agregados o flocs, cuando la concentración de materia orgánica en el reactor es baja; estos flocs sedimentan fácilmente en un sistema de separación, que en general consiste en un decantador.In general, spills are treated in systems denominated of "activated sludge", formed by the following elements: roughing bars, desanador-degreaser, primary decanter, Biological reactor and secondary decanter. The essence of activated sludge processes is the capacity of the populations of microorganisms form aggregates or flocs, when the concentration of organic matter in the reactor is low; these flocs they settle easily in a separation system, which in general It consists of a decanter.
La eliminación de la materia orgánica comporta la generación de biomasa bacteriana. Hasta el momento actual la eliminación o reducción de dicha biomasa se efectúa mediante un proceso de digestión, aerobio o anaerobio. La digestión consiste en introducir el fango bacteriano en un depósito y mantenerlo en aireación, en caso de ser aerobio, durante un tiempo variable con un mínimo de 6 días y un máximo de 15 días. En el caso de ser anaerobio la digestión se efectúa en un recipiente cerrado y se mantiene el fango en agitación durante un periodo prolongado de tiempo, de 10 a 60 días de tiempo de retención hidráulico. La masa bacteriana en las condiciones descritas emplea las reservas nutricionales acumuladas en sus células, cuando no restan materiales de reserva, las células, bien optan por enquistarse, bien optan por provocar una autolisis celular. Como antecedentes de la invención cabe destacar los documentos siguientes:The elimination of organic matter involves the generation of bacterial biomass. So far the elimination or reduction of said biomass is carried out through a digestion process, aerobic or anaerobic. Digestion consists of introduce the bacterial sludge into a tank and keep it in aeration, if aerobic, for a variable time with a minimum of 6 days and a maximum of 15 days. In the case of being anaerobic digestion is carried out in a closed container and is keeps the sludge in agitation for a prolonged period of time, 10 to 60 days of hydraulic retention time. Mass bacterial under the conditions described employs the reserves Nutritional accumulated in their cells, when they do not subtract backup materials, cells, well choose to encyst, They choose to cause cell autolysis. As a background of The invention includes the following documents:
En la patente US4069148 se contempla un tratamiento con adición de Carbón activo o tierras de fuller, estableciendo una concentración posible de masa bacteriana activa hasta 50000 ppm con el fin de actuar sobre los fenómenos de absorción y decantación que permiten eliminar substancias tóxicas o poco biodegradables, tal como el color. La utilización de carbón activo tiene dos inconvenientes importantes: el primer inconveniente es que el carbón activo tiene una gran superficie específica pero tiene una densidad muy baja; este hecho comporta una disminución en la densidad total de fango y en consecuencia dificulta el incremento de la densidad del mismo. El segundo inconveniente es que la dureza del carbón activo, cuando se emplea en concentraciones elevadas, daña los sistemas hidráulicos, originando un coste adicional al tratamiento.Patent US4069148 contemplates a treatment with the addition of activated carbon or fuller earth, establishing a possible concentration of active bacterial mass up to 50,000 ppm in order to act on the phenomena of absorption and decantation that allow the elimination of toxic substances or Not very biodegradable, such as color. The use of coal asset has two major drawbacks: the first drawback is that active carbon has a large specific surface area but It has a very low density; this fact implies a decrease in the total density of sludge and consequently hinders the increased density of it. The second drawback is that the hardness of active carbon, when used in high concentrations, damages hydraulic systems, causing An additional cost to the treatment.
En la patente US5759403 se contempla la adición de filosilicatos (mica, Caolín, pirophylita, talco) aumentado la decantabilidad de los fangos y mejorando el porcentaje de biodegradación, incluso operando a media y alta carga, es decir con una relación de materia orgánica aportada por unidad de masa bacteriana (relación F/M) de 0,5 a 1. En estas condiciones de F/M la edad del fango es baja con lo que se obtiene una generación de fangos en exceso.In US5759403 the addition is contemplated of phyllosilicates (mica, kaolin, pirophylita, talcum) increased the sludge decantability and improving the percentage of biodegradation, even operating at medium and high load, that is, with a ratio of organic matter contributed per unit of mass bacterial (F / M ratio) from 0.5 to 1. Under these conditions of F / M the mud age is low with what you get a generation of excess sludge.
Por tanto, el problema técnico a resolver consiste en la obtención de un incremento de la edad de fangos en procesos de "fangos activados" con dos objetivos: de una parte, la reducción elevada de la generación de "fangos en exceso" y, de otra parte, la generación de masa bacteriana lentamente biodegradable, todo ello manteniendo un volumen de reactor reducido.Therefore, the technical problem to solve it consists in obtaining an increase in the age of sludge in "activated sludge" processes with two objectives: one part, the high reduction in the generation of "sludge in excess "and, on the other hand, the generation of bacterial mass slowly biodegradable, all maintaining a volume of reduced reactor
El método de la presente invención presenta unas particularidades orientadas a obtener un incremento de la edad de fangos en procesos de "fangos activados", solucionando los problemas determinados por la excesiva formación de fangos biológicos, sin necesidad de emplear procesos de digestión antes descritos, disminuyendo los costes operativos generados en el tratamiento de los vertidos y evitando el problema de la ubicación posterior de los fangos.The method of the present invention has some particularities aimed at obtaining an increase in the age of sludge in "activated sludge" processes, solving the problems determined by excessive sludge formation biological, without using digestion processes before described, reducing the operating costs generated in the treatment of spills and avoiding the problem of location Rear of the sludge.
El método de la invención consiste en adicionar al reactor biológico material inerte, compuesto por arcillas sepiolíticas y/o attapulgitas u otros, con un tamaño de partícula inferior a 100 micras, de elevada superficie específica, superior a 10 m^{2}/gr., y de una densidad real de 1 gr./cm^{3} o superior, sobre la cual nidifica la masa bacteriana, formando una estructura equivalente a los flocs bacterianos y conocida como "fangos activados" pero que permite aumentar la densidad de los lodos entre 1 y 2, y así aumentar la concentración de sólidos hasta alcanzar concentraciones entre 20 y 60 gr./l.The method of the invention consists in adding to the inert material biological reactor, composed of clays sepiolytic and / or attapulgite or others, with a particle size less than 100 microns, high specific surface area, greater than 10 m 2 / gr., And of a real density of 1 gr./cm^{3} or superior, on which the bacterial mass nests, forming a structure equivalent to bacterial flocs and known as "activated sludge" but which increases the density of sludge between 1 and 2, and thus increase the concentration of solids until reaching concentrations between 20 and 60 gr./l.
La separación de la facción sólida de la líquida se efectúa mediante sedimentación en decantadores habituales de las estaciones de tratamiento por "fangos activados" y los fangos se retornan a cabecera del sistema mediante bombeo, como se efectúa habitualmente en dichos procesos.The separation of the solid faction from the liquid it is carried out by sedimentation in habitual decanters of the treatment stations for "activated sludge" and sludge they are returned to the head of the system by pumping, as is done usually in these processes.
La relación de mezcla entre las arcillas sepiolíticas y la attapulgita se establece de acuerdo con la densidad de fangos que queremos conseguir, quedando ésta entre el 20% y el 70% de arcillas sobre la masa total de fangos.The mixing ratio between clays sepiolitics and attapulgite is established in accordance with the density of sludge that we want to achieve, being this one among the 20% and 70% of clays on the total mass of sludge.
El método se efectúa de tal forma que el tiempo de retención celular se aumenta manteniéndolo en valores que superan los 10 días.The method is carried out in such a way that time cell retention is increased by keeping it at values that They exceed 10 days.
Las ventajas del sistema son evidentes, no solo en la cantidad de biomasa conseguida, sino por la facilidad de manipular dicha biomasa. En este proceso no observamos problemas por colmatación o ensuciamiento del lecho bacteriano y, cuando el crecimiento bacteriano ha llegado a un valor máximo, la purga de fangos se efectúa fácilmente, sin necesidad de efectuar lavados enojosos que interrumpen el funcionamiento de la masa bacteriana.The advantages of the system are obvious, not only in the amount of biomass achieved, but by the ease of manipulate said biomass. In this process we do not observe problems by clogging or fouling of the bacterial bed and, when the bacterial growth has reached a maximum value, the purge of sludge is easily carried out, without washing angry that disrupt the functioning of the dough bacterial
Por otra parte se obtiene una masa bacteriana adherida, lo que permite separar fácilmente la facción sólida, ya que la densidad de fangos en este caso da un valor, expresado como índice volumétrico de fangos (IVF), de 15 ml./gr., es decir que la dificultad de separación no se observa hasta que tenemos una concentración de 66 gr. de materia de suspensión por litro.On the other hand a bacterial mass is obtained adhered, allowing you to easily separate the solid faction, already that the density of sludge in this case gives a value, expressed as volumetric sludge index (IVF), 15 ml./gr., that is to say separation difficulty is not observed until we have a 66 gr concentration of suspension matter per liter.
Otras ventajas inherentes al proceso vienen dadas por la densidad de los fangos. Así es factible aumentar la potencia específica de los sistemas de aireación hasta valores de 150 a 300 W/m^{3}, sin que se originen problemas en la fase de separación de sólidos en los decantadores secundarios, esta potencia permite introducir hasta 420 gr./m^{3}.h de oxígeno y hasta 1200 gr.O_{2}/m^{3}.h si aportamos O_{2} puro.Other advantages inherent in the process come given by the density of the sludge. Thus it is feasible to increase the specific power of aeration systems up to values of 150 to 300 W / m 3, without causing problems in the phase of separation of solids in the secondary decanters, this power allows you to enter up to 420 gr./m^{3}.h of oxygen and up to 1200 gr.O2 / m3 .h if we provide pure O2.
Por otra parte, el incremento en la densidad del fango facilita la adición de polímeros orgánicos que actúan como coadyuvantes de la coagulación y floculación bacteriana.On the other hand, the increase in the density of sludge facilitates the addition of organic polymers that act as coagulation aids and bacterial flocculation.
Una vez descrita suficientemente la naturaleza de la invención, se hace constar a los efectos oportunos que en la misma se podrán introducir las modificaciones que se consideren oportunas, siempre y cuando ello no suponga una alteración de las características esenciales de la invención que se reivindican a continuación.Once nature is sufficiently described of the invention, it is stated for the appropriate purposes that in the the modifications that are considered may be introduced timely, as long as this does not involve an alteration of the essential features of the invention claimed in continuation.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200500986A ES2263378A1 (en) | 2005-04-25 | 2005-04-25 | Degradation of organic matter by activated sludge process with high biomass concentrations and low sludge production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200500986A ES2263378A1 (en) | 2005-04-25 | 2005-04-25 | Degradation of organic matter by activated sludge process with high biomass concentrations and low sludge production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2263378A1 true ES2263378A1 (en) | 2006-12-01 |
Family
ID=37810145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200500986A Pending ES2263378A1 (en) | 2005-04-25 | 2005-04-25 | Degradation of organic matter by activated sludge process with high biomass concentrations and low sludge production |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2263378A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1335464A (en) * | 1970-01-14 | 1973-10-31 | Du Pont | Waste water treatment process |
| US3928191A (en) * | 1972-10-06 | 1975-12-23 | Du Pont | Biodegradation of methanolic waste water |
| US3968036A (en) * | 1974-06-17 | 1976-07-06 | Exxon Research And Engineering Company | Method of treating waste water |
| US5643453A (en) * | 1994-06-02 | 1997-07-01 | Degremont | Process for the treatment of liquid effluents by activated sludge |
| US5759403A (en) * | 1993-03-11 | 1998-06-02 | Naintsch Mineralwerke Gessellschaft M.B.H. | Method for purifying waste water using activated slude to increase purification yields |
-
2005
- 2005-04-25 ES ES200500986A patent/ES2263378A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1335464A (en) * | 1970-01-14 | 1973-10-31 | Du Pont | Waste water treatment process |
| US3928191A (en) * | 1972-10-06 | 1975-12-23 | Du Pont | Biodegradation of methanolic waste water |
| US3968036A (en) * | 1974-06-17 | 1976-07-06 | Exxon Research And Engineering Company | Method of treating waste water |
| US5759403A (en) * | 1993-03-11 | 1998-06-02 | Naintsch Mineralwerke Gessellschaft M.B.H. | Method for purifying waste water using activated slude to increase purification yields |
| US5643453A (en) * | 1994-06-02 | 1997-07-01 | Degremont | Process for the treatment of liquid effluents by activated sludge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Iorhemen et al. | Membrane fouling control in membrane bioreactors (MBRs) using granular materials | |
| Changotra et al. | Treatment of real pharmaceutical wastewater using combined approach of Fenton applications and aerobic biological treatment | |
| Liu et al. | A review of incorporation of constructed wetland with other treatment processes | |
| Asri et al. | Biofilm-based systems for industrial wastewater treatment | |
| ES2064083T5 (en) | METHOD AND REACTOR FOR WATER PURIFICATION. | |
| Gupta et al. | Conventional wastewater treatment technologies | |
| CN204918299U (en) | Biological laboratory effluent disposal system | |
| WO2009102186A1 (en) | Energy optimization in an anaerobic, facultative, anoxic aerobic plant, using fine bubbles, without sludge production | |
| Dhall et al. | Biodegradation of sewage wastewater using autochthonous bacteria | |
| Parvathy et al. | Biological Treatment Systems for Fish Processing Wastewater-A Review. | |
| Zhang et al. | Achieving simultaneous biological nutrient removal and sludge minimization from marine ship sewage based on an innovative Landscape Integrated Ecological Treatment System (LIETS) | |
| JP6046991B2 (en) | Anaerobic wastewater treatment method using carrier | |
| Hodaifa et al. | Green techniques for wastewaters | |
| ES2259204T3 (en) | BIOLOGICAL PROCEDURE AND ANOXIC AND / OR AEROBIUM BIOLOGICAL REACTOR FOR THE CLEANING OF LIQUID WASTE. | |
| JP2012213764A (en) | Decoloring cleaning method and decoloring cleaning apparatus of organic colored wastewater | |
| ES2263378A1 (en) | Degradation of organic matter by activated sludge process with high biomass concentrations and low sludge production | |
| TWI557080B (en) | Biological treatment method and device for organic waste water | |
| KR101170073B1 (en) | formation method for purifying marsh | |
| Çifçi et al. | A critical review on biofiltration for wastewater treatment: Focus on organic micropollutants | |
| CN103880184B (en) | A kind of without the ultra-clean sewage water treatment method of sludge organism ball and system | |
| Iorhemen et al. | Utilization of aerobic granulation to mitigate membrane fouling in MBRs | |
| CN213141734U (en) | Domestic sewage treatment system combining multistage physicochemical and biochemical treatment | |
| CN214400152U (en) | Landscape water treatment system | |
| KR19980043133A (en) | Oxidation spherical natural purification treatment method | |
| JP2014100679A (en) | Anaerobic wastewater treatment method using carrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EC2A | Search report published |
Date of ref document: 20061201 Kind code of ref document: A1 |
|
| FC2A | Grant refused |
Effective date: 20090223 |