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 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 present invention provides an exhaust gas purification system. In the exhaust gas purification system, a shower nozzle 20 disperses liquid toward exhaust gas 11 from an upper portion of the exhaust gas 11. The dispersed liquid is mixed with the exhaust gas 11 and thereafter, the liquid accumulates in a tank 30, and odor and oil content are dissolved by action of microorganism included in the liquid in the tank 30. The shower nozzle 20 is connected to an opening 24 horizontally provided in a nozzle pipe 23 connected to a liquid-supply pipe conduit 22. The exhaust gas purification system includes a nozzle 20N directed to a downward dispersing direction of the liquid. The nozzle 20N is placed in the nozzle pipe 23 such that a lower end 20L of the nozzle 20N is located higher than a bottom 25 of an inner wall of a pipe conduit of the nozzle pipe 23. According to this, exhaust gas including odor and oil content is purified.

Method of sequestration of carbon dioxide characterized in that it comprises: a step of production of at least one macrophyte plant species floating on an expanse of fresh water in order to form a raft of plant biomass; a step of transportation of said raft of plant biomass from said expanse of fresh water to a sea; a step of dispersal and decomposition of said raft of plant biomass on an expanse of said sea; at least one of said step of production, said step of transportation and said step of dispersal and decomposition being carried out with human assistance.

Method of sequestration of carbon dioxide characterized in that it comprises: a step of production of at least one macrophyte plant species floating on an expanse of fresh water in order to form a raft of plant biomass; a step of transportation of said raft of plant biomass from said expanse of fresh water to a sea; a step of dispersal and decomposition of said raft of plant biomass on an expanse of said sea; at least one of said step of production, said step of transportation and said step of dispersal and decomposition being carried out with human assistance.

The disclosure provides for the separation and combustion of at least one hydrocarbon, oxygenate, sulfur compound, and or nitrogen compound, from industrial gas or gasification derived syngas to generate steam. A gasification process and a gas fermentation process may be integrated using tail gas from the fermentation process for the flame to combust tar and other compounds from the syngas generated by a gasification process. Integration may be achieved by removing tar and other compounds from industrial gas or gasification derived syngas using an adsorbent and regenerating the adsorbent using tail gas from the gas fermentation process. Tail gas enriched with the desorbed tar and other compounds may be used to generate steam in a steam boiler and the steam may be used for a variety of purposes including power generation to power, for example, a compressor of the gas fermentation process.

Processes, systems, and associated control methodologies are disclosed that control the flow of biogas during the biogas cleanup process to create a more consistent flow of biogas through the digester, while also optimizing the output and efficiency of the overall renewable natural gas facility. In representative embodiments, a biogas buffer storage system may be used during the cleanup process to control the pressure and flow rate of biogas. The biogas buffer storage system may monitor and control the biogas flow rate to either bring down or increase the digester pressure, thereby maintaining a normalized biogas flow rate.

The subject invention provides materials and methods for reducing deleterious atmospheric gases, such as greenhouse gases (GHGs) by enhancing utilization and storage of carbon in plants, as well as increasing the sequestration of carbon in plant and soil matter in the form of degradation-resistant organic polymers.

The present invention relates to a method of capturing CO.sub.2 from a gas stream. The method uses a two liquid phase capture composition.

The present invention relates to a method of capturing CO.sub.2 from a gas stream. The method uses a two liquid phase capture composition.