The invention is directed to a process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier and a biofilm of microorganisms under anaerobic conditions wherein the pH of the aqueous solution is above 7.5 and wherein the aqueous solution comprises between 0.3 and 4 M sodium cations or between 0.3 and 4 M sodium and potassium cations and more than 20 mM phosphate ions.
The invention is directed to a reactor vessel for use in a bioelectrochemical process provided with a horizontally extending reaction zone. The reaction zone comprises one or more working electrodes comprising a current distributor or current collector and multiple vertically extending membrane conduits having a closed lower end. Inside the vertically extending membrane conduits a counter electrode and a liquid supply conduit for a liquid counter electrolyte is present. At the exterior the one or more working electrodes are present. The counter electrolyte liquid supply conduit is a vertically extending liquid supply conduit having a liquid outlet at its lower end. The liquid inlet opening of the supply conduit is present in a horizontally extending upper manifold. The upper manifold is vertically spaced from the reaction zone defining a horizontally extending fluid discharge zone between the upper manifold and the reaction zone within the reactor vessel.
C25B 9/23 - Cellules comprenant des électrodes fixes de dimensions stablesAssemblages de leurs éléments de structure avec des diaphragmes comprenant des membranes échangeuses d'ions dans ou sur lesquelles est incrusté du matériau pour électrode
C25B 9/70 - Assemblages comprenant plusieurs cellules
C25B 11/052 - Électrodes comportant un substrat et un ou plusieurs revêtements électro-catalytiques
The invention is directed to a process to convert a mixture of carbon monoxide and hydrogen to methane by performing the following steps: (a) performing a water gas shift reaction to convert carbon monoxide to carbon dioxide to obtain a shifted mixture comprising of carbon dioxide and hydrogen and (b) contacting the shifted mixture with an electron charged packed bed comprising of a carrier and a biofilm of microorganisms in an aqueous solution having a pH of above 7.5 and under anaerobic conditions.
C10K 3/04 - Modification de la composition chimique des gaz combustibles contenant l'oxyde de carbone en vue de produire un carburant amélioré, p. ex. un carburant de pouvoir calorifique différent qui peut ne pas contenir d'oxyde de carbone par traitement catalytique réduisant le taux d'oxyde de carbone
C12P 5/02 - Préparation des hydrocarbures acycliques
4.
PROCESS FOR THE DEGRADATION OF ONE OR MORE HYDROCARBONS
The invention is directed to a process for the degradation of one or more hydrocarbons as present in an aqueous feed solution, wherein the one or more hydrocarbons are at least one of phenol, methyl phenyl ketone and methyl phenyl carbinol. The degradation takes place in a series of two or more continuously operated bio-electrochemical cells thereby defining at least one upstream bio-electrochemical cell and one downstream bio-electrochemical cell and wherein an applied cell voltage in each bio-electrochemical cell is different. The bio-electrochemical cell comprises a culture of microorganisms. The one or more hydrocarbons are converted at the anode whereby carbon dioxide, protons and optionally degradation products are formed. At the cathode carbon dioxide and/or the optional degradation products are reacted with the protons to methane. A treated aqueous solution is so obtained having a reduced content of the one or more hydrocarbons.
C02F 101/34 - Composés organiques contenant de l'oxygène
C02F 103/36 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'industrie chimique non prévue dans les groupes provenant de la fabrication de composés organiques
5.
A PROCESS TO TREAT A CARBON DIOXIDE COMPRISING GAS
The invention is directed to a process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier, suitably activated carbon granules, and a biofilm of microorganisms under anaerobic conditions, wherein more than 90 mol % of the dissolved carbon dioxide in the aqueous solution is present as a bicarbonate ion and/or as a carbonate ion.
C12P 5/02 - Préparation des hydrocarbures acycliques
C12M 1/12 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens de stérilisation, filtration ou dialyse
C12M 1/42 - Appareils pour le traitement de micro-organismes ou d'enzymes au moyen d'énergie électrique ou ondulatoire, p. ex. magnétisme, ondes sonores
C25B 9/40 - Cellules ou assemblages de cellules comprenant des électrodes constituées de particulesAssemblages de leurs éléments de structure
C25B 11/063 - Métal valve, c.-à-d. dont l’oxyde est semi-conducteur, p. ex. titane
C25B 11/075 - Électrodes comportant des électro-catalyseurs sur un substrat ou un support caractérisées par le matériau électro-catalytique formé d’un seul élément catalytique ou composé catalytique
C25B 15/08 - Alimentation ou vidange des réactifs ou des électrolytesRégénération des électrolytes
C12M 1/107 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens pour recueillir les gaz de fermentation, p. ex. le méthane
The invention is directed to a process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier and a biofilm of microorganisms under anaerobic conditions wherein the pH of the aqueous solution is above 7.5 and wherein the aqueous solution comprises between 0.3 and 4 M sodium cations or between 0.3 and 4 M sodium and potassium cations and more than 20 mM phosphate ions.
C12P 5/02 - Préparation des hydrocarbures acycliques
C12M 1/107 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens pour recueillir les gaz de fermentation, p. ex. le méthane
C12M 1/00 - Appareillage pour l'enzymologie ou la microbiologie
C12M 1/12 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens de stérilisation, filtration ou dialyse
C12M 1/42 - Appareils pour le traitement de micro-organismes ou d'enzymes au moyen d'énergie électrique ou ondulatoire, p. ex. magnétisme, ondes sonores
C12N 13/00 - Traitement de micro-organismes ou d'enzymes par énergie électrique ou ondulatoire, p. ex. par magnétisme, par des ondes sonores
C25B 11/075 - Électrodes comportant des électro-catalyseurs sur un substrat ou un support caractérisées par le matériau électro-catalytique formé d’un seul élément catalytique ou composé catalytique
C25B 15/023 - Mesure, analyse ou test pendant la production électrolytique
C25B 15/08 - Alimentation ou vidange des réactifs ou des électrolytesRégénération des électrolytes
7.
Continuous process to treat a hydrogen sulphide comprising gas
The invention is directed to a continuous process to treat a hydrogen sulphide comprising gas comprising the following steps: (a) contacting the hydrogen sulphide comprising gas with an aqueous alkaline solution further comprising sulphide oxidising bacteria thereby obtaining a loaded aqueous solution comprising sulphide compounds and sulphide oxidising bacteria. (b) contacting the loaded aqueous solution with an oxygen comprising gas to regenerate the sulphide oxidising bacteria to obtain a liquid effluent comprising regenerated sulphide oxidising bacteria which is partly used as the aqueous alkaline solution in step (a). (c) separating elemental sulphur as prepared by the sulphide oxidising bacteria in steps (a) and (b) from the loaded aqueous solution of step (a) and/or from the liquid effluent of step (b) and wherein the consumption of oxygen in step (b) is measured and wherein the supply of oxygen in step (b) is controlled by the measured consumption of oxygen.
The invention is directed to a process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier, suitably activated carbon granules, and a biofilm of microorganisms under anaerobic conditions, wherein more than 90 mol% of the dissolved carbon dioxide in the aqueous solution is present as a bicarbonate ion and/or as a carbonate ion.
C12P 5/02 - Préparation des hydrocarbures acycliques
C12M 1/107 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens pour recueillir les gaz de fermentation, p. ex. le méthane
C12M 1/00 - Appareillage pour l'enzymologie ou la microbiologie
C12M 1/42 - Appareils pour le traitement de micro-organismes ou d'enzymes au moyen d'énergie électrique ou ondulatoire, p. ex. magnétisme, ondes sonores
C12N 13/00 - Traitement de micro-organismes ou d'enzymes par énergie électrique ou ondulatoire, p. ex. par magnétisme, par des ondes sonores
C12P 39/00 - Procédés faisant intervenir simultanément des micro-organismes de différents genres dans le même procédé
C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
C25B 11/037 - Électrodes constituées de particules
The invention is directed to a continuous process to treat a hydrogen sulphide comprising gas comprising the following steps: (a) contacting the hydrogen sulphide comprising gas with an aqueous alkaline solution further comprising sulphide oxidising bacteria thereby obtaining a loaded aqueous solution comprising sulphide compounds and sulphide oxidising bacteria. (b) contacting the loaded aqueous solution with an oxygen comprising gas to regenerate the sulphide oxidising bacteria to obtain a liquid effluent comprising regenerated sulphide oxidising bacteria which is partly used as the aqueous alkaline solution in step (a). (c) separating elemental sulphur as prepared by the sulphide oxidising bacteria in steps (a) and (b) from the loaded aqueous solution of step (a) and/or from the liquid effluent of step (b) and wherein the consumption of oxygen in step (b) is measured and wherein the supply of oxygen in step (b) is controlled by the measured consumption of oxygen.
The invention is directed to a process to convert a sulphur compound to bisulphide by direct or indirect transfer of electrons from a cathode of a bio-electrochemical cell to the sulphur compound under anaerobic conditions and in the presence of mixed culture comprising methanogens and suitably also a anaerobic or facultative anaerobic bacteria. The sulphur compound may be a thiol like methanethiol or ethanethiol or a polysulphide, like dimethyl disulphide.
The invention is directed to a process to oxidise total ammonia nitrogen, also referred to as TAN, as dissolved in an aqueous solution (1) by (i) contacting the aqueous solution with oxidised ammonia- oxidizing bacteria (AOB) under anaerobic conditions wherein TAN is converted and reduced ammonia-oxidizing bacteria is obtained and (ii) wherein in a separate step the reduced ammonia-oxidizing bacteria are oxidised in a separate step by transfer of electrons to an anode (4) of an electrochemical cell (3) to obtain the oxidised ammonia-oxidizing bacteria.
C02F 3/34 - Traitement biologique de l'eau, des eaux résiduaires ou des eaux d'égout caractérisé par les micro-organismes utilisés
C02F 101/16 - Composés de l'azote, p. ex. ammoniac
C02F 103/18 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'épuration des effluents gazeux par voie humide
C02F 103/20 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'élevage d'animaux
12.
Process to convert bisulphide to elemental sulphur
The invention is directed to a control method for a process to convert bisulphide to elemental sulphur in an aqueous solution comprising sulphide-oxidising bacteria wherein the process is controlled by applying a potential between the anode electrode and the cathode electrode or between the anode electrode and the reference electrode of an electrochemical cell resulting in a current between the cathode electrode and the anode electrode, measuring a current as measured by an electrochemical cell and adapting the process in response to the measured current. The process to convert bisulphide may comprise the following steps: (a) contacting bisulphide with oxidised sulphide-oxidising bacteria in the aqueous solution and elemental sulphur, (b) oxidizing the reduced sulphide-oxidising bacteria, (c) using the oxidised sulphide-oxidising bacteria obtained in step (b) in step (a) and (d) isolating elemental sulphur from the aqueous solution obtained in step (a) and/or step (b).
C02F 3/34 - Traitement biologique de l'eau, des eaux résiduaires ou des eaux d'égout caractérisé par les micro-organismes utilisés
G01N 27/49 - Systèmes impliquant la détermination du courant à une valeur unique spécifique, ou dans une petite plage de valeurs, pour une tension appliquée afin de produire la mesure sélective d'une ou plusieurs espèces ioniques particulières
C12P 3/00 - Préparation d'éléments ou de composés inorganiques à l'exception du dioxyde de carbone
C12Q 3/00 - Procédés de commande sensible aux conditions du milieu
The invention is directed to a process to prepare elemental sulphur by (i) contacting an aqueous solution comprising bisulphide with oxidised sulphide-oxidising bacteria under anaerobic conditions wherein elemental sulphur is produced and a reduced sulphide-oxidising bacteria is obtained and (ii) wherein the reduced sulphide-oxidising bacteria are oxidised by transfer of electrons to an anode of an electrochemical cell to obtain the oxidised sulphide-oxidising bacteria.
The invention is directed to a process to convert a sulphur compound to bisulphide by direct or indirect transfer of electrons from a cathode of a bio-electrochemical cell to the sulphur compound under anaerobic conditions and in the presence of mixed culture comprising methanogens and suitably also a anaerobic or facultative anaerobic bacteria. The sulphur compound may be a thiol like methanethiol or ethanethiol or a polysulphide, like dimethyl disulphide.
C25B 1/00 - Production électrolytique de composés inorganiques ou de non-métaux
C25B 3/04 - Production électrolytique de composés organiques par réduction
C25B 9/06 - Cellules comportant des électrodes fixes de dimensions stables; Assemblages de leurs éléments de structure
C25B 11/04 - ÉlectrodesLeur fabrication non prévue ailleurs caractérisées par le matériau
B01D 53/32 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par effets électriques autres que ceux prévus au groupe
B01D 53/72 - Composés organiques non prévus dans les groupes , p. ex. hydrocarbures
B01D 53/73 - Post-traitement des composants éliminés
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Chemical processing equipment, namely distillers,
evaporators and sterilizer; gas scrubbers [parts of gas
installations]; gas cleaners and purifiers, namely, gas
scrubbers; separators for the cleaning and purification of
gases; scrubbing columns for the purification of gases;
filters for gases [household or industrial installations];
industrial installations for filtering liquids; oil
purifying installations; gas cleaning and purifying
installations; water purification installations; water
filters for industrial purposes; installations for the
collection of gases; water treatment filters; filters for
waste gas purification; air cleaning filters [parts of air
cleaning machines or installations]; water purification,
desalination and conditioning installations; water purifying
units for producing potable water. Installation services for chemical processing equipment,
namely distillers, evaporators and sterilizer; installation
services for gas cleaners and purifiers, namely, gas
scrubbers; installation services for filters for gases
[household or industrial installations]; installation
services for industrial installations for filtering liquids;
installation services for oil purifying installations;
installation services for gas cleaning and purifying
installations; installation services for water purification
installations; repair and maintenance services for chemical
processing equipment, namely distillers, evaporators and
sterilizer; repair and maintenance services for gas cleaners
and purifiers, namely, gas scrubbers; repair and maintenance
services for filters for gases [household or industrial
installations]; repair and maintenance services for
industrial installations for filtering liquids; repair and
maintenance services for oil purifying installations; repair
and maintenance services for gas cleaning and purifying
installations; advisory service, consultancy and
informations for aforementioned services. Treatment and purification of water and gases; treatment of
waste water from industrial processes; disposal of waste
water from industrial processes; purification of industrial
waste water; purification of gases; processing of waste oil;
water purification; deodorization of natural gas,
purification of natural gas. Scientific and technological services; scientific and
technological design; research services in the field of
science; design services; technical design; design and
development of new technology for others; engineering
services for the design of the installations for oil
purifying, gas cleaning and purifying, water purification,
collection of gases, water purification, desalination and
conditioning; design and development of testing and analysis
methods; testing, authentication and quality control; design
of diagnostic apparatus and equipment; technical design
services with regards to purification equipment; chemical
analytical examinations; analytical services with regards to
the assessment of bacteriological content of fluids and
gases; advisory service, consultancy and information on the
aforementioned services.
37 - Services de construction; extraction minière; installation et réparation
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Chemical processing equipment, namely, distillers, evaporators and sterilizer; gas scrubbers being part of gas installations; gas cleaners and purifiers, namely, gas scrubbers; separators for the cleaning and purification of gases; scrubbing columns for the purification of gases; filters for gases being air filters for household and industrial installations; industrial installations for filtering water and oil; oil purifying installations; gas cleaning and purifying installations, namely, deodorizers and separators; water purification installations; water filters for industrial purposes; installations for the collection of gases, namely gas purification and deodorizing machines; water treatment filters; filters for waste gas purification; air cleaning filters being parts of air cleaning machines or installations; water purification, desalination and conditioning installations; water purifying units for producing potable water Installation services for chemical processing equipment, namely, distillers, evaporators and sterilizer; installation services for gas cleaners and purifiers, namely, gas scrubbers; installation services for filters for gases being household or industrial installations; installation services for industrial installations for filtering liquids; installation services for oil purifying installations; installation services for gas cleaning and purifying installations; installation services for water purification installations; repair and maintenance services for chemical processing equipment, namely, distillers, evaporators and sterilizer; repair and maintenance services for gas cleaners and purifiers, namely, gas scrubbers; repair and maintenance services for filters for gases being household or industrial installations; repair and maintenance services for industrial installations for filtering liquids; repair and maintenance services for oil purifying installations; repair and maintenance services for gas cleaning and purifying installations; advisory service, consultancy and informations for aforementioned services Treatment and purification of water and gases; treatment of waste water from industrial processes; waste water treatment services, namely, disposal of waste water from industrial processes; purification of industrial waste water; purification of gases; processing of waste oil; water purification; deodorization of natural gas, purification of natural gas Scientific and technological services, namely, scientific research, analysis, testing, in the fields of oil, gas and waste water; scientific and technological design of natural gas and waste water installations; research services in the field of science; design services, namely, industrial design; technical design, namely, architectural and engineering design; design and development of new technology for others; engineering services for the design of the installations for oil purifying, gas cleaning and purifying, water purification, collection of gases, desalination and conditioning; design and development of scientific testing and analysis methods; testing, authentication and quality control of oil, gas and water; testing, authentication in the fields of oil, gas and water and quality control for others; design of diagnostic apparatus and equipment; technical design services with regards to purification equipment; chemical analytical examinations; analytical services with regards to the assessment of bacteriological content of fluids and gases; advisory service, consultancy and information on the aforementioned services
The invention is directed to a process to prepare elemental sulphur by (i) contacting an aqueous solution comprising bisulphide with oxidised sulphide-oxidising bacteria under anaerobic conditions wherein elemental sulphur is produced and a reduced sulphide-oxidising bacteria is obtained and (ii) wherein the reduced sulphide-oxidising bacteria are oxidised by transfer of electrons to an anode of an electrochemical cell to obtain the oxidised sulphide-oxidising bacteria.
The invention is directed to a control method for a process to convert bisulphide to elemental sulphur in an aqueous solution comprising sulphide-oxidising bacteria wherein the process is controlled by applying a potential between the anode electrode and the cathode electrode or between the anode electrode and the reference electrode of an electrochemical cell resulting in a current between the cathode electrode and the anode electrode, measuring a current as measured by an electrochemical cell and adapting the process in response to the measured current. The process to convert bisulphide may comprise the following steps: (a) contacting bisulphide with oxidised sulphide-oxidising bacteria in the aqueous solution and elemental sulphur, (b) oxidizing the reduced sulphide-oxidising bacteria, (c) using the oxidised sulphide-oxidising bacteria obtained in step (b) in step (a) and (d) isolating elemental sulphur from the aqueous solution obtained in step (a) and/or step (b).
A process to treat a gas comprising hydrogen sulphide and mercaptans is described. The following steps are part of this process: (a) contacting the hydrogen sulphide and mercaptans comprising gas (1) with an aqueous solution (3) comprising sulphide-oxidising bacteria thereby obtaining a loaded aqueous solution (5) and a gas (4) having a lower content of hydrogen sulphide and mercaptans, (b) contacting the loaded aqueous solution with mercaptan reducing microorganisms immobilized on a carrier under anaerobic conditions, (c) separating the aqueous solution obtained in step (b) from the mercaptan reducing microorganisms to obtain a first liquid effluent (7), and (d) contacting the first liquid effluent (7) with an oxidant (9) to regenerate the sulphide-oxidising bacteria to obtain a second liquid effluent (11) comprising regenerated sulphide-oxidising bacteria. The sulphide-oxidising bacteria as present in step (a) are comprised of regenerated sulphide-oxidising bacteria obtained in step (d).
C02F 103/18 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'épuration des effluents gazeux par voie humide
20.
Process for the biological conversion of bisulphide into elemental sulphur
The invention is directed to a process for the biological conversion of bisulphide into elemental sulphur, comprising the following steps: a) converting bisulphide as dissolved in an aqueous solution to elemental sulphur in the presence of sulphide-oxidizing bacteria and under anaerobic conditions to obtain a first liquid effluent comprising elemental sulphur and used sulphide-oxidizing bacteria; b) regenerating the used sulphide-oxidizing bacteria as obtained in step (a) and as comprised in an aqueous solution in the presence of an oxidant to obtain a second liquid effluent comprising regenerated sulphide-oxidizing bacteria; c) separating elemental sulphur from either the first and/or the second liquid effluent; d) using the regenerated sulphide-oxidizing bacteria in step (a) as the sulphide-oxidizing bacteria.
C02F 103/18 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'épuration des effluents gazeux par voie humide
21.
PROCESS FOR TREATING A HYDROGEN SULPHIDE AND MERCAPTANS COMPRISING GAS
A process to treat a gas comprising hydrogen sulphide and mercaptans is described. The following steps are part of this process: (a) contacting the hydrogen sulphide and mercaptans comprising gas (1) with an aqueous solution (3) comprising sulphide-oxidising bacteria thereby obtaining a loaded aqueous solution (5) and a gas (4) having a lower content of hydrogen sulphide and mercaptans, (b) contacting the loaded aqueous solution with mercaptan reducing microorganisms immobilized on a carrier under anaerobic conditions, (c) separating the aqueous solution obtained in step (b) from the mercaptan reducing microorganisms to obtain a first liquid effluent (7), and (d) contacting the first liquid effluent (7) with an oxidant (9) to regenerate the sulphide-oxidising bacteria to obtain a second liquid effluent (11) comprising regenerated sulphide-oxidising bacteria. The sulphide-oxidising bacteria as present in step (a) are comprised of regenerated sulphide-oxidising bacteria obtained in step (d).
The invention is directed to a process for the biological conversion of bisulphide into elemental sulphur, comprising the following steps: a) converting bisulphide as dissolved in an aqueous solution to elemental sulphur in the presence of sulphide-oxidising bacteria and under anaerobic conditions to obtain a first liquid effluent comprising elemental sulphur and used sulphide-oxidising bacteria; b) regenerating the used sulphide-oxidising bacteria as obtained in step (a) and as comprised in an aqueous solution in the presence of an oxidant to obtain a second liquid effluent comprising regenerated sulphide-oxidising bacteria; c) separating elemental sulphur from either the first and/or the second liquid effluent; d) using the regenerated sulphide-oxidising bacteria in step (a) as the sulphide-oxidising bacteria.
The invention is directed to a process for the biological conversion of bisulphide into elemental sulphur, comprising the following steps: a) converting bisulphide as dissolved in an aqueous solution to elemental sulphur in the presence of sulphide-oxidising bacteria and under anaerobic conditions to obtain a first liquid effluent comprising elemental sulphur and used sulphide-oxidising bacteria; b) regenerating the used sulphide-oxidising bacteria as obtained in step (a) and as comprised in an aqueous solution in the presence of an oxidant to obtain a second liquid effluent comprising regenerated sulphide-oxidising bacteria; c) separating elemental sulphur from either the first and/or the second liquid effluent; d) using the regenerated sulphide-oxidising bacteria in step (a) as the sulphide-oxidising bacteria.
A process to treat a gas comprising hydrogen sulphide and mercaptans is described. The following steps are part of this process: (a) contacting the hydrogen sulphide and mercaptans comprising gas (1) with an aqueous solution (3) comprising sulphide-oxidising bacteria thereby obtaining a loaded aqueous solution (5) and a gas (4) having a lower content of hydrogen sulphide and mercaptans, (b) contacting the loaded aqueous solution with mercaptan reducing microorganisms immobilized on a carrier under anaerobic conditions, (c) separating the aqueous solution obtained in step (b) from the mercaptan reducing microorganisms to obtain a first liquid effluent (7), and (d) contacting the first liquid effluent (7) with an oxidant (9) to regenerate the sulphide-oxidising bacteria to obtain a second liquid effluent (11) comprising regenerated sulphide-oxidising bacteria. The sulphide-oxidising bacteria as present in step (a) are comprised of regenerated sulphide-oxidising bacteria obtained in step (d).
The invention is directed to a process to convert a sulphur compound to bisulphide by direct or indirect transfer of electrons from a cathode of a bio-electrochemical cell to the sulphur compound under anaerobic conditions and in the presence of mixed culture comprising methanogens and suitably also a anaerobic or facultative anaerobic bacteria. The sulphur compound may be a thiol like methanethiol or ethanethiol or a polysulphide, like dimethyl disulphide.
The invention is directed to a process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier and a biofilm of microorganisms under anaerobic conditions wherein the pH of the aqueous solution is above 7.5 and wherein the aqueous solution comprises between 0.3 and 4 M sodium cations or between 0.3 and 4 M sodium and potassium cations and more than 20 mM phosphate ions.
C12M 1/00 - Appareillage pour l'enzymologie ou la microbiologie
C12M 1/107 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens pour recueillir les gaz de fermentation, p. ex. le méthane
C12M 1/12 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens de stérilisation, filtration ou dialyse
C12M 1/42 - Appareils pour le traitement de micro-organismes ou d'enzymes au moyen d'énergie électrique ou ondulatoire, p. ex. magnétisme, ondes sonores
C12N 13/00 - Traitement de micro-organismes ou d'enzymes par énergie électrique ou ondulatoire, p. ex. par magnétisme, par des ondes sonores
C12P 5/02 - Préparation des hydrocarbures acycliques
C25B 11/075 - Électrodes comportant des électro-catalyseurs sur un substrat ou un support caractérisées par le matériau électro-catalytique formé d’un seul élément catalytique ou composé catalytique
C25B 15/023 - Mesure, analyse ou test pendant la production électrolytique
C25B 15/08 - Alimentation ou vidange des réactifs ou des électrolytesRégénération des électrolytes
27.
A PROCESS TO TREAT A CARBON DIOXIDE COMPRISING GAS
The invention is directed to a process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier, suitably activated carbon granules, and a biofilm of microorganisms under anaerobic conditions, wherein more than 90 mol% of the dissolved carbon dioxide in the aqueous solution is present as a bicarbonate ion and/or as a carbonate ion.
C12M 1/00 - Appareillage pour l'enzymologie ou la microbiologie
C12M 1/107 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens pour recueillir les gaz de fermentation, p. ex. le méthane
C12M 1/12 - Appareillage pour l'enzymologie ou la microbiologie avec des moyens de stérilisation, filtration ou dialyse
C12M 1/42 - Appareils pour le traitement de micro-organismes ou d'enzymes au moyen d'énergie électrique ou ondulatoire, p. ex. magnétisme, ondes sonores
C12N 13/00 - Traitement de micro-organismes ou d'enzymes par énergie électrique ou ondulatoire, p. ex. par magnétisme, par des ondes sonores
C12P 5/02 - Préparation des hydrocarbures acycliques
C12P 39/00 - Procédés faisant intervenir simultanément des micro-organismes de différents genres dans le même procédé
C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
C25B 11/037 - Électrodes constituées de particules
