ES2692244B2 - Batch procedure for continuous treatment of liquid effluents by electrochemical techniques for their purification - Google Patents
Batch procedure for continuous treatment of liquid effluents by electrochemical techniques for their purification Download PDFInfo
- Publication number
- ES2692244B2 ES2692244B2 ES201730750A ES201730750A ES2692244B2 ES 2692244 B2 ES2692244 B2 ES 2692244B2 ES 201730750 A ES201730750 A ES 201730750A ES 201730750 A ES201730750 A ES 201730750A ES 2692244 B2 ES2692244 B2 ES 2692244B2
- Authority
- ES
- Spain
- Prior art keywords
- effluent
- auxiliary
- auxiliary tank
- tank
- discoloration
- 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
- 238000000034 method Methods 0.000 title claims description 83
- 238000000746 purification Methods 0.000 title claims description 6
- 239000007788 liquid Substances 0.000 title claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 31
- 230000003647 oxidation Effects 0.000 claims description 30
- 238000002845 discoloration Methods 0.000 claims description 18
- 230000001590 oxidative effect Effects 0.000 claims description 17
- 230000008030 elimination Effects 0.000 claims description 14
- 238000003379 elimination reaction Methods 0.000 claims description 14
- 238000004043 dyeing Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000460 chlorine Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 239000005416 organic matter Substances 0.000 claims description 7
- 238000013019 agitation Methods 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 238000010923 batch production Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 238000002203 pretreatment Methods 0.000 claims description 5
- 239000004753 textile Substances 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 238000004042 decolorization Methods 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 239000011368 organic material Substances 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 101100184147 Caenorhabditis elegans mix-1 gene Proteins 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- JFBJUMZWZDHTIF-UHFFFAOYSA-N chlorine chlorite Inorganic materials ClOCl=O JFBJUMZWZDHTIF-UHFFFAOYSA-N 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000012388 gravitational sedimentation Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011169 microbiological contamination Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physical Water Treatments (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
DESCRIPCIONDESCRIPTION
Procedimiento por lotes para tratamiento en continuo de efluentes liquidos por tecnicas electroquimicas para su depuracionBatch procedure for continuous treatment of liquid effluents by electrochemical techniques for their purification
Sector de la tecnicaSector of the technique
La presente invention trata de un procedimiento por lotes para tratamiento en continuo de efluentes liquidos por tecnicas electroquimicas para su depuracion, y opcional reutilizacion. El procedimiento se realiza en una instalacion que consta de diferentes depositos que se llenan secuencialmente de acuerdo a las necesidades del proceso. Asimismo, la instalacion esta equipada con diferentes instrumentos/sensores para asegurar que las caracterlsticas y condiciones del efluente cumplen unos parametros especlficos para el tratamiento.The present invention deals with a batch process for the continuous treatment of liquid effluents by electrochemical techniques for their purification, and optional reuse. The procedure is carried out in an installation consisting of different tanks that are filled sequentially according to the needs of the process. Likewise, the installation is equipped with different instruments / sensors to ensure that the characteristics and conditions of the effluent meet specific parameters for the treatment.
Estado de la tecnica anteriorState of the prior art
Por la patente ES-B1-2238933, del mismo titular que la presente solicitud, ya se describe un proceso de tratamiento y reutilizacion de efluentes textiles mediante la decoloration por tecnicas electroquimicas, la posterior irradiation opcional con luz ultravioleta y la reutilizacion del agua decolorada y del electrolito y otros auxiliares que esta contiene en nuevos procesos de tintura. Este procedimiento, sin embargo, proporciona una intensidad baja de las tinturas, ya que debe anadirse del orden de un 20-50% de colorante adicional para obtener una intensidad similar a las tinturas con agua de red. Esto es debido a que el agua a reutilizar contiene determinados compuestos que deberlan eliminarse antes de empezar un nuevo proceso.Patent ES-B1-2238933, from the same owner as the present application, already describes a process of treatment and reuse of textile effluents by decoloration by electrochemical techniques, the subsequent optional irradiation with ultraviolet light and the reuse of discolored water and of the electrolyte and other auxiliaries that it contains in new dyeing processes. This procedure, however, provides a low intensity of the dyes, since it should be added in the order of 20-50% of additional dye to obtain an intensity similar to dyeings with mains water. This is because the water to be reused contains certain compounds that should be eliminated before starting a new process.
Por la patente ES-B1-2395318, tambien del mismo titular que la presente invencion, se describe un procedimiento de tratamiento y reutilizacion de efluentes textiles por tecnicas electroquimicas, en donde el bano residual de tintura se recoge en una celda electroqulmica y se realiza el tratamiento del bano residual en la celda electroqulmica combinado con irradiacion con luz ultravioleta, reutilizandose el agua decolorada y el electrolito que esta contiene en un nuevo proceso de tintura. Antes de la recogida del efluente en la celda electroqulmica o despues del tratamiento en la misma se realiza un ajuste a pH menor que 5, mediante adicion de HCl o H2SO4 en funcion del electrolito de tintura. Asimismo, una vez que el efluente ha sido tratado, despues del ajuste del pH, se realiza una etapa intermedia de reconstitution del bano de tintura para su reutilizacion posterior en un nuevo proceso de tintura. Este procedimiento es mas efectivo que el descrito en la patente ES-B1-2238933 ya que al reutilizar el efluente no se requiere mayor cantidad de colorante que al tenir con agua de red. Sin embargo, no resulta eficiente porque se alarga mucho mas el proceso de tratamiento y reconstitucion del efluente. Tambien se ha comprobado recientemente que no es aconsejable ajustar el pH a 5 antes del tratamiento electroqulmico porque se acorta notablemente la vida util de los electrodos y del resto de los componentes del equipo.By the patent ES-B1-2395318, also from the same owner as the present invention, a method of treatment and reuse of textile effluents by electrochemical techniques is described, wherein the residual dyeing bath is collected in an electrochemical cell and the treatment of the residual bath in the electrochemical cell combined with irradiation with ultraviolet light, reusing the discolored water and the electrolyte it contains in a new dyeing process. Before the collection of the effluent in the electrochemical cell or after the treatment therein, an adjustment is made to a pH lower than 5, by adding HCl or H 2 SO 4 as a function of the dyeing electrolyte. Likewise, once the effluent has been treated, after adjustment of the pH, an intermediate stage of reconstitution of the dyeing bath is carried out for its subsequent reuse in a new dyeing process. This procedure is more effective than the one described in the patent ES-B1-2238933 since when reusing the effluent, no greater quantity of colorant is required than when using water from the network. However, it is not efficient because the process of treatment and reconstitution of the effluent is much longer. It has also recently been found that it is not advisable to adjust the pH to 5 before the electrochemical treatment because the useful life of the electrodes and the rest of the components of the equipment is shortened significantly.
Por la solicitud de patente US-A1-2015166383 se conoce un procedimiento y una planta de aguas residuales industriales y/o de tratamiento de agua potable por medio de metodos electroqulmicos y procesos de oxidacion avanzada. La fase de preparation de la sedimentation gravitacional es seguida por un tratamiento principal que consta de electrocoagulation, electrooxidacion y electroflotacion a traves de la action de conjuntos de electrodos metalicos en paralelo con la desinfeccion/oxidacion con ozono, irradiation UV y el tratamiento de ultrasonidos, as! como recirculation en el campo electromagnetico. La siguiente fase es la separation de los sedimentos del agua limpia que se descarga a traves de arena y filtros de carbon activo con el proposito de eliminar los floculos flotantes en el tanque de recoleccion. Si es necesario, el agua esta sujeta a la oxidacion con la accion simultanea de la irradiacion ultravioleta (UV) y ozono a efectos de destruction final de la materia y amoniaco organico, y posibles residuos de la contamination microbiologica.The patent application US-A1-2015166383 discloses a process and an industrial wastewater treatment plant and / or treatment of drinking water by means of electrochemical methods and advanced oxidation processes. The preparation phase of the gravitational sedimentation is followed by a main treatment consisting of electrocoagulation, electrooxidation and electroflotation through the action of sets of metal electrodes in parallel with disinfection / oxidation with ozone, UV irradiation and ultrasonic treatment, ace! as recirculation in the electromagnetic field. The next phase is the separation of the sediments from the clean water that is discharged through sand and activated carbon filters with the purpose of eliminating the floating flocs in the collection tank. If necessary, water is subject to oxidation with the simultaneous action of ultraviolet (UV) and ozone irradiation for the purpose of final destruction of matter and organic ammonia, and possible residues of microbiological contamination.
Existe, por tanto, la necesidad de ofrecer un nuevo procedimiento mas eficiente y efectivo para tratamiento de efluentes por tecnicas electroqulmicas para su depuration, y opcional reutilizacion, que permita el tratamiento en continuo del procedimiento.There is, therefore, the need to offer a new more efficient and effective procedure for the treatment of effluents by electrochemical techniques for their depuration, and optional reuse, which allows the continuous treatment of the procedure.
Explication de la inventionExplanation of the invention
Para ese fin, ejemplos de realization de la presente invencion proporcionan un procedimiento por lotes para tratamiento en continuo de efluentes por tecnicas electroqulmicas para su depuracion, y opcional reutilizacion, que comprende realizar un proceso de decoloration y/u oxidacion de un efluente procedente de un conducto de suministro de un proceso industrial utilizando tecnicas electroqulmicas, siendo sometido el citado efluente a un proceso de pre-tratamiento mediante filtrado y realizando ulteriormente a dicho proceso de pre-tratamiento las siguientes etapas:For this purpose, embodiments of the present invention provide a batch process for the continuous treatment of effluents by electrochemical techniques for their purification, and optional reuse, which comprises performing a process of decoloration and / or oxidation of an effluent from a conduit for the supply of an industrial process using electrochemical techniques, said effluent being subjected to a pre-treatment process by filtering and subsequently carrying out said pre-treatment process the following stages:
a) analizar unas propiedades de dicho efluente pre-tratado mediante unos sensores tales como un sensor de pH, un sensor de temperatura, un sensor de conductividad electrica y opcionalmente un medidor de caudal; a) analyzing properties of said pre-treated effluent by means of sensors such as a pH sensor, a temperature sensor, an electrical conductivity sensor and optionally a flow meter;
b) hacer circular el efluente por al menos una celda electroqulmica que dispone de una sonda de temperatura y que aporta al efluente, por oxidation de los iones o moleculas presentes en el mismo, una cantidad de especies oxidantes, tales como cloro/hipoclorito, por unidad de volumen iniciando de esta forma la oxidacion y/o decoloration del efluente;b) circulate the effluent by at least one electrochemical cell that has a temperature probe and that contributes to the effluent, by oxidation of the ions or molecules present therein, a quantity of oxidizing species, such as chlorine / hypochlorite, by unit of volume thus initiating the oxidation and / or decoloration of the effluent;
c) rellenar, secuencialmente, al menos dos depositos auxiliares con el efluente procedente de la celda electroqulmica, que es al menos una, para proseguir la reaction de oxidacion y/o decoloracion con las especies oxidantes generadas en la celda electroqulmica;c) filling, sequentially, at least two auxiliary tanks with the effluent from the electrochemical cell, which is at least one, to continue the reaction of oxidation and / or discoloration with the oxidizing species generated in the electrochemical cell;
d) tras un perlodo de tiempo del efluente en los dos depositos auxiliares, realizar, mediante un sensor de elimination que comprende un sensor de color o un sensor de materia organica, una medida del grado de decoloracion u oxidacion del efluente de un deposito auxiliar de dichos dos depositos auxiliares, y si el grado de decoloracion u oxidacion obtenido no es mayor o igual a un umbral, iniciar una recirculation del efluente de dicho deposito auxiliar hacia la celda electroqulmica para generar nuevas especies oxidantes y retornar el efluente tratado a dicho deposito auxiliar hasta su llenado para continuar el proceso de oxidacion y/o decoloracion;d) after a period of time of the effluent in the two auxiliary tanks, perform, by means of an elimination sensor comprising a color sensor or a sensor of organic matter, a measure of the degree of discoloration or oxidation of the effluent from an auxiliary tank of said two auxiliary tanks, and if the degree of discoloration or oxidation obtained is not greater than or equal to a threshold, initiate a recirculation of the effluent from said auxiliary tank to the electrochemical cell to generate new oxidizing species and return the treated effluent to said auxiliary tank until its filling to continue the oxidation and / or discoloration process;
e) una vez el citado deposito auxiliar ha sido rellenado, realizar la etapa d) para el otro deposito auxiliar de dichos dos depositos auxiliares; ye) once said auxiliary deposit has been filled in, carry out stage d) for the other auxiliary deposit of said two auxiliary deposits; Y
f) una vez que uno de los dos depositos auxiliares ha alcanzado el grado de decoloracion u oxidacion fijado, tras una o varias secuencias de recirculacion, descargar (es decir, bombear fuera de la maquina para ser desechado, acumulado en un deposito exterior o usado en otras aplicaciones) el efluente del deposito auxiliar que haya alcanzado el grado de decoloracion u oxidacion fijado o iniciar una reconstitution del efluente para su reutilizacion en un proceso industrial.f) once one of the two auxiliary tanks has reached the degree of discoloration or oxidation fixed, after one or more recirculation sequences, discharge (ie, pump out of the machine to be discarded, accumulated in an outside or used tank) in other applications) the effluent from the auxiliary tank that has reached the degree of discoloration or oxidation set or initiate a reconstitution of the effluent for reuse in an industrial process.
Dependiendo del volumen del efluente a tratar puede que sea necesario utilizar mas de dos depositos auxiliares. En tal caso, las etapas c) a f) anteriormente descritas tambien se realizarlan para estos depositos adicionales utilizados.Depending on the volume of the effluent to be treated it may be necessary to use more than two auxiliary tanks. In such a case, steps c) to f) described above will also be performed for these additional deposits used.
Preferiblemente, dentro de cada uno de los depositos auxiliares se realiza ademas una agitation, por ejemplo mediante unas palas giratorias o mediante aire, entre otros, del efluente. Preferiblemente, los depositos auxiliares estaran equipados con fuentes de luz ultravioleta (UV) para mejorar el rendimiento del proceso.Preferably, an agitation is also carried out within each of the auxiliary tanks, for example by rotating blades or by air, among others, of the effluent. Preferably, the auxiliary deposits will be equipped with ultraviolet (UV) light sources to improve the performance of the process.
Asimismo, preferiblemente, antes de la etapa b), se realiza una etapa de comprobacion de los resultados del analisis de la etapa a) y si en funcion de los mismos el efluente no cumple unos criterios para su decoloracion y/u oxidacion por un proceso electroqulmico, se desecha el efluente a traves de una seccion de derivation del conducto de suministro hacia un desague.Also, preferably, before step b), a step of verifying the results of the analysis of step a) is carried out and if according to the same the effluent does not meet some criteria for its discoloration and / or oxidation by a Electrochemical process, the effluent is discharged through a derivation section of the supply conduit to a drain.
En un ejemplo de realization, el proceso de reconstitution del efluente se realiza unicamente en el deposito auxiliar de los depositos auxiliares que se ha rellenado en primer lugar en la citada etapa c). En este caso, una vez que el deposito auxiliar que se ha rellenado en segundo lugar (tomando el ejemplo de realizacion en el que solamente se utilizan dos depositos auxiliares) ha alcanzado el grado de decoloration y/u oxidation fijado, tras una o varias secuencias de recirculation, bien puede descargar su efluente o bien puede enviarlo al deposito auxiliar que se ha rellenado en primer lugar para su reconstitucion.In a realization example, the process of reconstitution of the effluent is carried out only in the auxiliary tank of the auxiliary tanks that has been filled first in the said stage c). In this case, once the auxiliary tank that has been refilled in the second place (taking the example of realization in which only two auxiliary tanks are used) has reached the degree of decoloration and / or oxidation fixed, after one or more sequences of recirculation, you can either discharge your effluent or you can send it to the auxiliary tank that has been filled in first for its reconstitution.
Segun la invention, para la reconstitucion del efluente para su reutilizacion en la tintura textil, se anade i) en primer lugar un acido al efluente del deposito auxiliar que ha alcanzado en primer lugar el grado de decoloracion fijado (supongase que es el deposito auxiliar que fue rellenado en primer lugar), con agitation, hasta que el efluente de dicho deposito auxiliar alcanza un primer nivel de pH determinado, inferior a 5, preferiblemente pH=3. Seguidamente, ii), se anade una sustancia con propiedades alcalinas (o alcali) al deposito auxiliar hasta que el efluente alcanza un segundo nivel de pH determinado, preferiblemente pH=7. A continuation, iii) se irradia el efluente con luz ultravioleta (UV) instalada en el deposito auxiliar para degradar las especies oxidantes que no han reaccionado. Luego, se determina iv) mediante un sensor las sustancias oxidantes del efluente del deposito auxiliar y se anade un agente reductor al deposito auxiliar hasta eliminar todas las especies oxidantes residuales del efluente. Finalmente v) se conduce al efluente, reconstituido, hasta un deposito de salida del conducto de suministro del proceso industrial para su reutilizacion.According to the invention, for the reconstitution of the effluent for its reuse in textile dyeing, i) firstly an acid is added to the effluent of the auxiliary tank that has first attained the degree of discoloration fixed (suppose it is the auxiliary deposit that was filled in first), with agitation, until the effluent of said auxiliary tank reaches a first level of a certain pH, lower than 5, preferably pH = 3. Then, ii) a substance with alkaline (or alkaline) properties is added to the auxiliary tank until the effluent reaches a second pH level, preferably pH = 7. Then, iii) the effluent is irradiated with ultraviolet light (UV) installed in the auxiliary tank to degrade the oxidizing species that have not reacted. Then, the oxidizing substances of the auxiliary tank effluent are determined by a sensor iv) and a reducing agent is added to the auxiliary tank until all residual oxidizing species are removed from the effluent. Finally v) the reconstituted effluent is conducted to an outlet tank of the industrial process supply conduit for reuse.
Opcionalmente, segun los requisitos para la aplicacion del efluente reconstituido, por ejemplo en ciertos procesos de tintura textil, dependiendo del proceso de tintura a realizar, en el citado deposito de salida se anadira una cantidad de cloruro sodico u otra, para lo cual, el deposito de salida dispone de unos sensores de iones cloruros y/o de conductividad.Optionally, according to the requirements for the application of the reconstituted effluent, for example in certain textile dyeing processes, depending on the dyeing process to be carried out, in the above-mentioned exit tank an amount of sodium chloride or another will be added, for which, the The outlet tank has chlorine and / or conductivity ion sensors.
En un ejemplo de realizacion, se realiza tambien una etapa de inversion de la polaridad y, en caso necesario, una limpieza qulmica con acido de unos electrodos de la celda electroqulmica, que es al menos una.In an exemplary embodiment, a step of reversing the polarity and, if necessary, a chemical cleaning with acid from electrodes of the electrochemical cell, which is at least one, is also carried out.
Breve description de los dibujos Brief description of the drawings
Las anteriores y otras ventajas y caracterlsticas se comprenderan mas plenamente a partir de la siguiente description detallada de unos ejemplos de realization con referencia a los dibujos adjuntos, que deben tomarse a tltulo ilustrativo y no limitativo, en los que:The foregoing and other advantages and features will be more fully understood from the following detailed description of some realization examples with reference to the attached drawings, which must be taken as an illustrative and non-limiting example, in which:
La Fig. 1 muestra un ejemplo de realizacion preferido de la instalacion o planta de tratamiento para aplicacion de un procedimiento por lotes para tratamiento en continuo de efluentes por tecnicas electroqulmicas para su depuration y opcional reutilizacion. FIG. 1 shows an example of a preferred embodiment of the treatment plant or plant for the application of a batch process for the continuous treatment of effluents by electrochemical techniques for their depuration and optional reuse.
La Fig. 2, en sus dos vistas 2a y 2b, es un diagrama de flujo que ilustra esquematicamente el citado procedimiento aplicado en la instalacion de la Fig. 1.Fig. 2, in its two views 2a and 2b, is a flow diagram illustrating schematically the aforementioned procedure applied in the installation of Fig. 1.
Las Figs. 3 a 6 muestran los diferentes procesos seguidos por el efluente en la instalacion de la Fig. 1 para su tratamiento.Figs. 3 to 6 show the different processes followed by the effluent in the installation of Fig. 1 for its treatment.
La Fig. 7 muestra el proceso seguido por el efluente para mantener las propiedades de los electrodos de la(s) celda(s) electroqulmica(s) de la instalacion.Fig. 7 shows the process followed by the effluent to maintain the properties of the electrodes of the electrochemical cell (s) of the installation.
La Fig. 8 es un diagrama de flujo que ilustra esquematicamente otro ejemplo de realizacion del procedimiento propuesto.Fig. 8 is a flow chart schematically illustrating another embodiment of the proposed method.
Descripcion detallada de la Invention y de unos ejemplos de realizacionDetailed description of the Invention and some examples of realization
Las Figs. 1 y 2 (dividida en 2a y 2b para su mejor legibilidad) muestran un ejemplo de realizacion preferido de una instalacion, y del correspondiente procedimiento, para tratamiento en continuo de efluentes llquidos por tecnicas electroqulmicas para su depuracion, y opcional reutilizacion. Tal como puede verse en las citadas figuras, la instalacion en este ejemplo de realizacion preferido comprende tres depositos auxiliares T1, T2, T3 que se iran rellenando secuencialmente de acuerdo a las necesidades del procedimiento. La instalacion, y el procedimiento, han sido disenados para su funcionamiento por lotes. Para ello, la instalacion esta equipada con diferentes sensores para asegurar que las caracterlsticas del efluente cumplen unos requisitos de calidad necesarios para su tratamiento. Segun este ejemplo de realizacion preferido, el efluente se separa en los tres depositos auxiliares T1, T2, T3, estando equipado, preferiblemente, cada uno de ellos con unas palas de agitation Mix (Mix1, Mix2, Mix3, respectivamente) para facilitar la homogeneizacion del efluente. Asimismo, segun este ejemplo de realizacion preferido, el tercer deposito auxiliar T3 es el unico deposito auxiliar equipado con una lampara, o lamparas, de luz ultravioleta (UV) para mejorar el rendimiento del proceso y al mismo tiempo eliminar las especies oxidantes en exceso del efluente y con los elementos necesarios para preparar al efluente para su reconstitucion para su reutilizacion en un proceso industrial de tintura (no limitativo, pues esta equipacion podria estar incluida en cualquiera de los otros dos depositos auxiliares T1 o T2).Figs. 1 and 2 (divided into 2a and 2b for better readability) show an example of a preferred embodiment of an installation, and of the corresponding procedure, for continuous treatment of liquid effluents by electrochemical techniques for their purification, and optional reuse. As can be seen in the cited figures, the installation in this preferred embodiment comprises three auxiliary tanks T1, T2, T3 that will be filled sequentially according to the needs of the process. The installation, and the procedure, have been designed for batch operation. For this, the installation is equipped with different sensors to ensure that the characteristics of the effluent meet quality requirements necessary for its treatment. According to this preferred embodiment, the effluent is separated into the three auxiliary reservoirs T1, T2, T3, each preferably being equipped with mixing agitation blades (Mix1, Mix2, Mix3, respectively) to facilitate homogenization of the effluent. Also, according to this preferred embodiment, the third auxiliary tank T3 is the only auxiliary tank equipped with a lamp, or lamps, of ultraviolet light (UV) to improve the performance of the process and at the same time eliminate the oxidizing species in excess of the effluent and with the necessary elements to prepare the effluent for its reconstitution for reuse in an industrial dyeing process (not limiting, since this kit could be included in any of the other two auxiliary tanks T1 or T2).
La instalacion de la Fig. 1 consta de:The installation of Fig. 1 consists of:
- valvulas V1-V25, de 2 o 3 posiciones;- Valves V1-V25, of 2 or 3 positions;
- sensores de presion S-P1 y S-P2;- pressure sensors S-P1 and S-P2;
- sensores de pH S-pH1 y S-pH2;- pH sensors S-pH1 and S-pH2;
- sensor de cloro S-Cloro;- Chlorine sensor S-Chlorine;
- sensor de conductividad S-Cond;- Conductivity sensor S-Cond;
- sensor de temperatura S-T1;- temperature sensor S-T1;
- sensor de temperatura S-T2, instalado dentro de la celda electroquimica E1; - sensor de temperatura S-T3, instalado dentro de una celda electroquimica E2; - sensor de elimination S-Elim;- temperature sensor S-T2, installed inside the electrochemical cell E1; - S-T3 temperature sensor, installed inside an E2 electrochemical cell; - elimination sensor S-Elim;
- medidor de caudal FM1;- flow meter FM1;
- medios de filtrado F1;- filtering means F1;
- depositos auxiliares T1, T2, T3;- auxiliary tanks T1, T2, T3;
- depositos de dosificacion de acido T4 y T5;- acid dosing tanks T4 and T5;
- deposito con agente reductor T6;- tank with reducing agent T6;
- deposito con substancias alcalinas T7;- tank with alkaline substances T7;
- mezcladores Mix1, Mix2, Mix3;- mixers Mix1, Mix2, Mix3;
- lampara ultravioleta UV1;- UV1 UV lamp;
- celdas electroquimicas E1, E2;- electrochemical cells E1, E2;
- sensores de nivel alto LH1, LH2, LH3, LH4 y LH5- high level sensors LH1, LH2, LH3, LH4 and LH5
- sensores de nivel bajo LL1, LL2, LL3, LL4, LL5 y LL6- low level sensors LL1, LL2, LL3, LL4, LL5 and LL6
- bombas P1-P7- pumps P1-P7
Los depositos de entrada y salida T_ENTRADA y T_SALIDA no forman parte de la instalacion, sino que tan solo se han incluido para ilustrar una instalacion industrial ideal. En el deposito de entrada T_ENTRADA se mezclan las aguas residuales procedentes de diferentes procesos industriales. Esta mezcla regulara la conductividad media de las aguas residuales para evitar picos de conductividad extremos en la instalacion. De esta manera, se incrementara la eficiencia global de la misma. Una vez que el efluente este completamente tratado se bombea al deposito de salida T SALIDA. The deposits of entry and exit T_ENTRADA and T_SALIDA are not part of the installation, but have only been included to illustrate an ideal industrial installation. In the T_ENTRADA input tank, wastewater from different industrial processes is mixed. This mixture will regulate the average conductivity of the wastewater to avoid extremes of conductivity in the installation. In this way, the overall efficiency of the same will be increased. Once the effluent is completely treated, it is pumped to the outlet tank T OUTPUT.
A continuation se detallaran los diferentes procesos realizados por el metodo propuesto segun el citado ejemplo de realization preferido.In the following, the different processes performed by the proposed method according to said preferred embodiment example will be detailed.
En primer lugar se realiza un analisis de las condiciones del efluente a tratar (ver Fig. 3). En esta etapa, la valvula de entrada V12 de la instalacion se abre para dejar entrar al efluente. Durante su camino, el efluente pasa por una serie de sensores de presion S-P1 y S-P2 y por unos medios de filtrado F1. La funcion de los medios de filtrado F1 es evitar un mal funcionamiento de la instalacion debido a algunos hilos, fibras u otros solidos en suspension que pueden ocasionar algunos problemas de obstruction en los conductos y de deterioro de la(s) celda(s) electroqulmica(s) E1, E2. La funcion de los sensores de presion S-P1 y S-P2 es detectar cada vez que los medios de filtrado F1 se obstruyen y evitar la cavitation que danarla la bomba P1.First, an analysis of the conditions of the effluent to be treated is carried out (see Fig. 3). In this stage, the inlet valve V12 of the installation is opened to let in the effluent. During its journey, the effluent passes through a series of pressure sensors S-P1 and S-P2 and through filtering means F1. The function of the filtering means F1 is to prevent a malfunction of the installation due to some wires, fibers or other solids in suspension that can cause some problems of obstruction in the conduits and deterioration of the electrochemical cell (s) (s) E1, E2. The function of the pressure sensors S-P1 and S-P2 is to detect each time the filtering means F1 becomes clogged and to avoid the cavitation that the pump P1 will damage.
Despues de este proceso de pre-tratamiento, el efluente pasa por uno o mas sensores para analizar unas propiedades del mismo. Estos sensores segun el citado ejemplo de realization preferido incluyen: un sensor de pH S-pH1, un sensor de temperatura S-T1, un sensor de conductividad electrica S-Cond y un medidor de caudal FM1.After this pre-treatment process, the effluent passes through one or more sensors to analyze its properties. These sensors according to said preferred embodiment example include: a pH sensor S-pH1, a temperature sensor S-T1, an electrical conductivity sensor S-Cond and a flow meter FM1.
Los citados sensores se utilizan para controlar la idoneidad del efluente. El efluente no pasa por la(s) celda(s) electroqulmica(s) E1, E2 si no cumple unos criterios de calidad preestablecidos para su decoloration y/u oxidation. Mientras el efluente no alcanza esta condition, el efluente se desecha a traves de una section de derivation hacia un desague. Con ello se reduce el dano de los electrodos de la(s) celda(s) electroqulmica(s) E1, E2.The mentioned sensors are used to control the suitability of the effluent. The effluent does not pass through the electrochemical cell (s) E1, E2 if it does not meet pre-established quality criteria for its decoloration and / or oxidation. While the effluent does not reach this condition, the effluent is discharged through a section of derivation towards a drain. This reduces the damage to the electrodes of the electrochemical cell (s) E1, E2.
Seguidamente, se realiza el llenado de los depositos auxiliares T1, T2, T3 (ver Fig.4). El proceso de llenado de los depositos auxiliares tiene lugar a traves de la(s) celda(s) electroqulmicas(s) E1, E2, por lo que el proceso de decoloration y/u oxidation se iniciara inmediatamente desde el primer momento que el efluente entra en el sistema. Dependiendo del volumen del efluente a tratar puede haber mas o menos depositos de recirculation (es decir, los depositos que no estan equipados con los elementos para preparar al efluente para su reconstitution, en este caso los depositos auxiliares T1 y T2). Tal como se ha comentado anteriormente, en este ejemplo de realization preferido se utilizan tres depositos auxiliares, utilizandose el deposito que primero se llena para la reconstitution del efluente, es decir el deposito auxiliar T3. Una vez que el deposito auxiliar T3 esta lleno, el siguiente en llenarse es el deposito auxiliar T2 y finalmente el deposito auxiliar T1. Next, the auxiliary tanks T1, T2, T3 are filled (see Fig.4). The filling process of the auxiliary tanks takes place through the electrochemical cell (s) E1, E2, so the decoloration and / or oxidation process will start immediately from the first moment the effluent enter the system. Depending on the volume of the effluent to be treated, there may be more or less recirculation deposits (that is, the deposits that are not equipped with the elements to prepare the effluent for reconstitution, in this case the auxiliary deposits T1 and T2). As mentioned above, in this preferred embodiment, three auxiliary tanks are used, using the tank that is first filled for the reconstitution of the effluent, that is to say the auxiliary tank T3. Once the auxiliary tank T3 is full, the next to be filled is the auxiliary tank T2 and finally the auxiliary tank T1.
Una vez que los tres depositos auxiliares T1, T2, T3 estan llenos se realiza la recirculacion del efluente por las celdas. Mediante los sensores de alto nivel LH1, LH2, LH3 instalados en cada uno de los tres depositos auxiliares T1, T2, T3 se comprueba cuando los depositos estan llenos. En este punto, el proceso de recirculacion comienza con el deposito auxiliar T3 (el que fue llenado en primer lugar) y continuara segun el orden de llenado del proceso (en este caso T2 y a continuation T1), siguiendo un esquema tlpico de ‘Primero en Entrar- Primero en Salir’ (FIFO en ingles). Mientras uno de los depositos auxiliares se utiliza para recirculacion, los otros dos se mantienen en almacenamiento. El almacenamiento opcionalmente con agitation, y opcionalmente tambien con irradiation UV, aumenta la eficiencia del proceso y reduce los costes electricos del tratamiento electroqulmico. Este proceso de recirculacion se lleva a cabo con cada deposito auxiliar T1, T2, T3 hasta que el sensor de elimination S-Elim indica que se decolora u oxida con el valor igual o superior al establecido.Once the three auxiliary tanks T1, T2, T3 are full, the effluent is recirculated through the cells. By means of the high-level sensors LH1, LH2, LH3 installed in each of the three auxiliary tanks T1, T2, T3, it is checked when the tanks are full. At this point, the recirculation process starts with the auxiliary tank T3 (the one that was filled first) and will continue according to the order of filling the process (in this case T2 and continuation T1), following a typical scheme of 'First in Enter- First Exit '(FIFO in English). While one of the auxiliary tanks is used for recirculation, the other two are kept in storage. The storage optionally with agitation, and optionally also with UV irradiation, increases the efficiency of the process and reduces the electrical costs of the electrochemical treatment. This recirculation process is carried out with each auxiliary tank T1, T2, T3 until the elimination sensor S-Elim indicates that it discolours or oxidizes with the value equal to or greater than that established.
Cuando el sensor de eliminacion S-Elim detecta que el efluente se encuentra dentro del grado de decoloration u oxidation fijado, el efluente se redirige hacia el deposito auxiliar T3. En este deposito auxiliar T3, el efluente se prepara para su posible reutilizacion en un proceso industrial. Mientras este proceso tiene lugar, los otros dos depositos auxiliares T1, T2 pueden estar recirculando el efluente (ver Fig. 5).When the S-Elim elimination sensor detects that the effluent is within the degree of decoloration or oxidation fixed, the effluent is redirected to the auxiliary tank T3. In this auxiliary tank T3, the effluent is prepared for possible reuse in an industrial process. While this process takes place, the other two auxiliary tanks T1, T2 may be recirculating the effluent (see Fig. 5).
Una vez el efluente ha sido decolorado/oxidado y listo para ser reutilizado, se conduce el mismo hasta un el deposito de salida T_SALIDA para su reutilizacion (ver Fig. 6). El deposito auxiliar que este vaclo se rellenara para continuar el proceso.Once the effluent has been bleached / oxidized and ready to be reused, it is conducted to the exit tank T_SALIDA for reuse (see Fig. 6). The auxiliary tank that is empty will be filled to continue the process.
Este proceso de recirculacion se lleva a cabo con cada deposito auxiliar T1, T2, T3 hasta que el sensor de eliminacion S-Elim indica que se decolora/oxida con el valor establecido.This recirculation process is carried out with each auxiliary tank T1, T2, T3 until the S-Elim elimination sensor indicates that it discolours / oxidizes with the set value.
Debe notarse que la instalacion propuesta, en vez de incluir un unico sensor de eliminacion S-Elim para detectar el grado de decoloracion/oxidacion del efluente de cada uno de los depositos auxiliares podrla incluir diferentes sensores de eliminacion, uno para cada deposito auxiliar utilizado en la instalacion. En este caso, cada sensor de eliminacion podrla estar incluido en cada deposito auxiliar de la instalacion.It should be noted that the proposed installation, instead of including a single S-Elim elimination sensor to detect the degree of discoloration / oxidation of the effluent from each of the auxiliary reservoirs could include different elimination sensors, one for each auxiliary tank used in installation. In this case, each elimination sensor could be included in each auxiliary deposit of the installation.
Aparte de los pasos anteriormente descritos, en un ejemplo de realization, tambien se puede considerar un paso adicional para el mantenimiento de los electrodos de la(s) celda(s) electroqulmica(s) E1, E2 (Ver Fig. 7). El mantenimiento de los electrodos de la(s) celda(s) electroqulmica(s) E1, E2 incluye la inversion de polaridad de los electrodos y en caso necesario, una limpieza qulmica con acido, a traves del deposito de dosificacion de acido T4.Apart from the steps described above, in a realization example, an additional step can also be considered for the maintenance of the electrodes of the electrochemical cell (s) E1, E2 (See Fig. 7). The maintenance of the electrodes of the electrochemical cell (s) E1, E2 includes the polarity inversion of the electrodes and if necessary, a chemical cleaning with acid, through the tank of acid dosage T4.
En un ejemplo de realization, alternativo al ejemplo de realization preferido de las Figs. 1 y 2 anteriormente descrito, en este caso no ilustrado, la instalacion comprende unicamente dos depositos auxiliares T2, T3 (no limitativo pues dependiendo del volumen del efluente a tratar se pueden utilizar mas depositos auxiliares). Segun este ejemplo de realizacion alternativo, cada uno de los dos depositos auxiliares T2, T3 esta equipado con una o varias lamparas de luz UV y preferiblemente tambien, con unas palas de agitation Mix 2, Mix3 para homogeneizar el efluente. Asimismo, segun este ejemplo de realizacion, cada uno de los dos depositos auxiliares T2, T3 tambien esta equipado con los elementos necesarios para preparar al efluente para su reconstitution. Es decir, a diferencia del ejemplo de realizacion de las Figs. 1 y 2, en el que la reconstitucion se llevaba a cabo solamente en uno de los depositos auxiliares de la instalacion, en particular en el deposito auxiliar T3, en este caso la reconstitucion se puede llevar a cabo en cualquiera de los depositos auxiliares de la instalacion. Por tanto, una vez que uno de los dos depositos auxiliares T2, T3 alcanza el grado de decoloration establecido, ya sea directamente sin recirculation o bien tras una o varias secuencias de recirculacion de los depositos en la(s) celda(s) electroqulmica(s) E1, E2, el deposito auxiliar que ha alcanzado en primer lugar el grado de decoloracion puede iniciar la reconstitucion.In a realization example, alternative to the preferred embodiment of Figs. 1 and 2 described above, in this case not illustrated, the installation comprises only two auxiliary tanks T2, T3 (not limiting because depending on the volume of the effluent to be treated, more auxiliary tanks can be used). According to this alternative embodiment, each of the two auxiliary tanks T2, T3 is equipped with one or more UV light lamps and preferably also with agitation blades Mix 2, Mix 3 to homogenize the effluent. Also, according to this example of embodiment, each of the two auxiliary tanks T2, T3 is also equipped with the necessary elements to prepare the effluent for its reconstitution. That is, unlike the embodiment example of Figs. 1 and 2, in which the reconstitution was carried out only in one of the auxiliary deposits of the installation, in particular in the auxiliary tank T3, in this case the reconstitution can be carried out in any of the auxiliary deposits of the installation. Therefore, once one of the two auxiliary tanks T2, T3 reaches the degree of decoloration established, either directly without recirculation or after one or more recirculation sequences of the deposits in the electrochemical cell (s) ( s) E1, E2, the auxiliary tank that has first reached the degree of discoloration can initiate the reconstitution.
Con referencia ahora a la Fig. 8, en la misma se muestra un ejemplo de realizacion de un procedimiento por lotes para tratamiento en continuo de efluentes por tecnicas electroqulmicas particularmente para ser implementado en una instalacion tal como la del ejemplo de realizacion alternativo explicado, es decir, en el que cada uno de los depositos auxiliares esta equipado con los elementos necesarios para preparar al efluente para su reconstitucion. El procedimiento ilustrado en la Fig. 8 realiza un proceso de decoloracion y/u oxidation de un efluente procedente de un conducto de suministro de un proceso industrial utilizando tecnicas electroqulmicas, en donde el efluente, etapa 801, es sometido a un proceso de pre-tratamiento mediante filtrado y posteriormente, etapa 802, a un analisis de las propiedades del efluente pre-tratado. Cuando el efluente satisface unos criterios de calidad, etapa 803, se hace circular el efluente por una o mas celdas electroqulmicas (como las de la Fig. 1), en donde cada celda dispone de una sonda de temperatura y aporta al efluente, por oxidacion de los iones o moleculas presentes en el mismo, una cantidad de especies oxidantes por unidad de volumen, tales como cloro/hipoclorito, iniciando de esta forma la oxidacion y/o decoloration del efluente. Luego, etapa 804, se rellenan, secuencialmente, los dos depositos auxiliares T2, T3 para proseguir la reaction de oxidation y/o decoloration con las especies oxidantes generadas en la(s) celda(s) electroqulmica(s) E1 o E2. Tras un perlodo de tiempo del efluente en los dos depositos T2, T3, se realiza una comprobacion, etapa 805, del grado de decoloration u oxidation del efluente de un deposito auxiliar de dichos dos depositos auxiliares T2, T3 (supongase que en primer lugar se realiza la comprobacion del deposito auxiliar que se ha llenado en primer lugar, por ejemplo T3) y si el grado de decoloration u oxidation obtenido no es mayor o igual a un umbral, se inicia una recirculation del efluente del deposito auxiliar T3 hacia la(s) celda(s) electroqulmica(s) E1 o E2 y se retorna el efluente al deposito auxiliar T3 hasta su llenado para continuar el proceso de oxidation y/o decoloration. Una vez el deposito auxiliar T3 ha sido rellenado, el proceso de la etapa 805 se repite para el otro deposito auxiliar T2. Finalmente, etapa 806, el efluente del deposito auxiliar que ha alcanzado el grado de decoloration u oxidation fijado, ya sea directamente o bien tras una o varias secuencias de recirculation, se puede descargar o alternativamente se puede iniciar una reconstitution del mismo para su reutilizacion en un proceso industrial, por ejemplo de tintura.With reference now to FIG. 8, there is shown an example of carrying out a batch process for continuous treatment of effluents by electrochemical techniques particularly to be implemented in an installation such as that of the alternative embodiment explained, is say, in which each of the auxiliary deposits is equipped with the necessary elements to prepare the effluent for its reconstitution. The procedure illustrated in Fig. 8 performs a process of decolorization and / or oxidation of an effluent from a supply conduit of an industrial process using electrochemical techniques, wherein the effluent, step 801, is subjected to a process of treatment by filtering and subsequently, stage 802, to an analysis of the properties of the pre-treated effluent. When the effluent satisfies quality criteria, stage 803, the effluent is circulated through one or more electrochemical cells (such as those in Fig. 1), where each cell has a temperature probe and contributes to the effluent, by oxidation of the ions or molecules present in it, an amount of oxidizing species per unit volume, such as chlorine / hypochlorite, thus initiating oxidation and / or decoloration of the effluent. Then, step 804, the two auxiliary tanks T2, T3 are sequentially filled to continue the reaction of oxidation and / or decoloration with the oxidizing species generated in the electrochemical cell (s) E1 or E2. After a period of time of the effluent in the two tanks T2, T3, a check is made, step 805, of the degree of decoloration or oxidation of the effluent of an auxiliary tank of said two auxiliary tanks T2, T3 (suppose that the first performs the verification of the auxiliary tank that has been filled first, for example T3) and if the degree of decoloration or oxidation obtained is not greater than or equal to a threshold, a recirculation of the effluent of the auxiliary tank T3 towards the ) electrochemical cell (s) E1 or E2 and the effluent is returned to the auxiliary tank T3 until it is filled to continue the oxidation and / or decoloration process. Once the auxiliary tank T3 has been filled in, the process of step 805 is repeated for the other auxiliary tank T2. Finally, step 806, the effluent of the auxiliary tank that has reached the degree of decoloration or oxidation fixed, either directly or after one or more recirculation sequences, can be unloaded or alternatively a reconstitution thereof can be initiated for its reuse in an industrial process, for example of dyeing.
La reconstitution del efluente, segun la presente invention, en cualquiera de los ejemplos de realization, consiste en anadir un acido al efluente del deposito auxiliar que ha alcanzado el grado de decoloration u oxidation fijado hasta que el efluente de dicho deposito auxiliar alcanza un primer nivel de pH determinado, inferior a 5, preferiblemente pH=3. Seguidamente, se anade una substancia con propiedades alcalinas, por ejemplo alcali, al deposito auxiliar hasta que el efluente alcanza un segundo nivel de pH determinado, preferiblemente pH=7. Se enciende la lampara UV para degradar las especies oxidantes presentes en el efluente. Se determina, mediante un sensor de cloro S-Cloro las especies oxidantes residuales en el efluente y se anade un agente reductor procedente del deposito T6 hasta eliminar todas las especies oxidantes residuales del efluente. Finalmente se conduce el efluente, reconstituido, hasta el deposito de salida T_SALIDA para su reutilizacion.The reconstitution of the effluent, according to the present invention, in any of the realization examples, consists of adding an acid to the effluent of the auxiliary tank that has reached the degree of decoloration or oxidation fixed until the effluent of said auxiliary tank reaches a first level of a certain pH, less than 5, preferably pH = 3. Next, a substance with alkaline properties, for example alkali, is added to the auxiliary tank until the effluent reaches a second pH level, preferably pH = 7. The UV lamp is turned on to degrade the oxidant species present in the effluent. The residual oxidizing species in the effluent is determined by means of a S-Chlorine chlorine sensor and a reducing agent is added from the T6 tank until all residual oxidizing species are removed from the effluent. Finally, the effluent, reconstituted, is conducted to the exit tank T_SALIDA for reuse.
Un experto en la materia podrla introducir cambios y modificaciones en los ejemplos de realization descritos sin salirse del alcance de la invention segun esta definido en las reivindicaciones adjuntas. A person skilled in the art could introduce changes and modifications in the described embodiment examples without departing from the scope of the invention as defined in the appended claims.
Claims (10)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201730750A ES2692244B2 (en) | 2017-05-31 | 2017-05-31 | Batch procedure for continuous treatment of liquid effluents by electrochemical techniques for their purification |
| PCT/ES2018/070395 WO2018220251A1 (en) | 2017-05-31 | 2018-05-31 | Batch process for continuous treatment of liquid effluents using electrochemical techniques for purifying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201730750A ES2692244B2 (en) | 2017-05-31 | 2017-05-31 | Batch procedure for continuous treatment of liquid effluents by electrochemical techniques for their purification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2692244A1 ES2692244A1 (en) | 2018-11-30 |
| ES2692244B2 true ES2692244B2 (en) | 2019-04-12 |
Family
ID=64400907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES201730750A Expired - Fee Related ES2692244B2 (en) | 2017-05-31 | 2017-05-31 | Batch procedure for continuous treatment of liquid effluents by electrochemical techniques for their purification |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES2692244B2 (en) |
| WO (1) | WO2018220251A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69937130T2 (en) * | 1998-06-26 | 2008-01-10 | Canon K.K. | Method and apparatus for treating colored liquids |
| ES2238933B1 (en) * | 2004-02-19 | 2006-12-01 | Universitat Politecnica De Catalunya | TREATMENT AND REUSE PROCESS OF TEXTILE EFFLUENTS BY ELECTROCHEMICAL TECHNIQUES. |
| US8999173B2 (en) * | 2007-06-04 | 2015-04-07 | Global Water Holdings, Llc | Aqueous treatment apparatus utilizing precursor materials and ultrasonics to generate customized oxidation-reduction-reactant chemistry environments in electrochemical cells and/or similar devices |
| ES2395318B1 (en) * | 2011-07-07 | 2013-12-18 | Universitat Politècnica De Catalunya | PROCESSING AND REUSE OF TEXTILE EFFLUENTS BY ELECTROCHEMICAL TECHNIQUES. |
-
2017
- 2017-05-31 ES ES201730750A patent/ES2692244B2/en not_active Expired - Fee Related
-
2018
- 2018-05-31 WO PCT/ES2018/070395 patent/WO2018220251A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018220251A1 (en) | 2018-12-06 |
| ES2692244A1 (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11046597B2 (en) | Method of membrane-coupled electrochemical advanced oxidation and its application device for water purification and water purification system using of the same | |
| JP5096565B2 (en) | Ballast tank circulation management system | |
| Zaleschi et al. | A comparative study of electrocoagulation and chemical coagulation processes applied for wastewater treatment. | |
| JP5475775B2 (en) | Ballast water treatment apparatus and method | |
| ES2355445T3 (en) | WASHING METHOD AND MEMBRANE SEPARATION DEVICE. | |
| JPH08126886A (en) | Production of ultrapure water and device therefor | |
| ES2326238T3 (en) | PROCEDURE FOR THE OXIDIZING TREATMENT OF WATER LIQUIDS. | |
| US20130193079A1 (en) | Water Purification System | |
| AU2021368580A1 (en) | Systems and methods for water treatment and storage | |
| KR100872124B1 (en) | Portable type apparatus for purifying waste-water | |
| JP2010528832A5 (en) | ||
| CN104507875A (en) | Water treatment device | |
| ES2692244B2 (en) | Batch procedure for continuous treatment of liquid effluents by electrochemical techniques for their purification | |
| JP2012024711A (en) | Electrochemical accelerated oxidation treatment apparatus for generating oh radical and ozone, treatment method of the same, and liquid purification apparatus using the same | |
| BR112020018165A2 (en) | wastewater treatment process and system for treating a wastewater stream | |
| CN207391201U (en) | Organic wastewater decoloration integrative intelligent system | |
| CN105481127A (en) | System for treating cultivation recycled-water through electrolysis-ultraviolet combination | |
| CN109928555A (en) | A kind of multiduty electrochemistry/nanofiltration circulating water treatment device and application | |
| WO2016174562A4 (en) | Dissolved ozone floatation effluent treatment system | |
| KR101566085B1 (en) | Apparatus for Membrane Chemical Cleansing in the Membrane and Electrolysis Treatment System for wastewater containing high organics and ammonia | |
| US20090236234A1 (en) | Electrolytic Process for Managing Urban Sewage | |
| KR101163344B1 (en) | A Method for Treatment of Ballast Water of Ship Using Electrolysis Unit | |
| BR112020018934A2 (en) | WASTE WATER TREATMENT PROCESS AND SYSTEM | |
| RU2332357C1 (en) | Method of sewage water neutralisation | |
| KR102312754B1 (en) | Water treatment equipment of integrated type using ceramic membrane and ozone oxidation reaction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BA2A | Patent application published |
Ref document number: 2692244 Country of ref document: ES Kind code of ref document: A1 Effective date: 20181130 |
|
| FG2A | Definitive protection |
Ref document number: 2692244 Country of ref document: ES Kind code of ref document: B2 Effective date: 20190412 |
|
| FD2A | Announcement of lapse in spain |
Effective date: 20240326 |