Patent application number | Description | Published |
20080299634 | Biogas Installation for Production of Biogas from Biomass, and Methods for Operation of the Biogas Installation - A biogas installation for production of biogas from biomass and methods for starting and shutting down a fermenter are disclosed. When biomass in a fermenter is used up, biogas production must stop, the fermented biomass removed, and the fermenter filled with fresh biomass. Biogas production and utilisation is maintained for as long as possible. When the methane concentration in the biogas outlet falls below an upper limit, the biogas line is disconnected. The biogas/off-gas mixture is fed out via an exhaust chimney until the methane concentration has fallen to a lower limit. The fermenter to be shut down is purged with fresh air, and the off-gas/biogas/fresh air mixture is fed out via the exhaust chimney until the carbon-dioxide concentration in the off-gas/biogas/fresh air mixture has fallen to a first limit. The fermenter is then opened to unload the consumed biomass and load fresh biomass. | 12-04-2008 |
20080307705 | Transport Device for Biomass in a Fermenter for the Generation of Biogas - A transport device for biomass in a fermenter for the generation of biogas and a large-scale fermenter equipped therewith are provided, in which transport device or fermenter a sufficient capacity for transporting the biomass through the transport passage is ensured. This is achieved by the provision of transport cushions on the base, on the side walls and/or at the top or the cover of the transport passage. By the transport cushions being periodically filled and emptied again, the biomass is moved through the transport passage by means of a peristaltic motion. | 12-18-2008 |
20090068725 | BIOREACTOR FOR METHANIZATION OF BIOMASS HAVING A HIGH SOLIDS FRACTION - A bioreactor having improved gas yield is described, wherein the necessary residence time of the biomass in the digestion tank is reduced. During the fermentation of dry, i.e. non-pumpable biomass, percolating juices, so-called percolate, is generated as a result of the moisture contained in the biomass, which percolate is withdrawn via a drainage system and, if necessary, recirculated from the top onto the biomass to be fermented. It has now been found that the biomass yield is significantly increased—in the region of between 10% and 40%—when the resultant percolate is not immediately withdrawn by way of the drainage system, but is accumulated in the digestion tank up to a specific level. This is achieved by a technical device wherein the digestion tank is liquid-tight, i.e. also the flap for loading and unloading the digestion tank must be liquid-tight and also be designed in a correspondingly solid manner in order to withstand the resultant liquid pressure. By linking the existing percolate drainage system with a percolate control system it is possible to adjust and control the liquid level of the percolate in the fermenting biomass in such a way that the biogas generation rate or the biogas yield is maximized. | 03-12-2009 |
20090239209 | COMBINED INSTALLATION FOR THE PRODUCTION OF BIOGAS AND COMPOST, AND METHOD OF SWITCHING A FERMENTER IN A LIKE INSTALLATION BETWEEN BIOGAS PRODUCTION AND COMPOSTING - A combined installation is disclosed for the production of biogas and compost, including a dry fermentation fermenter for producing biogas in a batch mode, a biogas outlet, a purging gas inlet, a biogas line connected to the biogas outlet, a waste gas line, a waste gas chimney connected to the biogas outlet via a first biogas/waste gas line, a waste gas flare connected to the biogas outlet via a second biogas/waste gas line, a fresh air line connected to the purging gas inlet, a control means for connecting the biogas outlet to the biogas line or the biogas/waste gas chimney via the first biogas/waste gas line or the waste gas flare via the second biogas/waste gas line and for connecting the purging gas inlet to the waste gas line or the fresh air line, and a measurement means connected to the control means for detecting methane and carbon dioxide concentrations. | 09-24-2009 |
20100311141 | BIOGAS INSTALLATION FOR PRODUCTION OF BIOGAS FROM BIOMASS, AND METHODS FOR OPERATION OF THE BIOGAS INSTALLATION - A biogas installation for production of biogas from biomass and methods for starting and shutting down a fermenter are disclosed. When biomass in a fermenter is used up, biogas production must stop, the fermented biomass removed, and the fermenter filled with fresh biomass. Biogas production and utilisation is maintained for as long as possible. When the methane concentration in the biogas outlet falls below an upper limit, the biogas line is disconnected. The biogas/off-gas mixture is fed out via an exhaust chimney until the methane concentration has fallen to a lower limit. The fermenter to be shut down is purged with fresh air, and the off-gas/biogas/fresh air mixture is fed out via the exhaust chimney until the carbon-dioxide concentration in the off-gas/biogas/fresh air mixture has fallen to a first limit. The fermenter is then opened to unload the consumed biomass and load fresh biomass. | 12-09-2010 |
20120093593 | Knife for the Machining of Spot Welding Electrodes, Cutting Tool and Cap Cutter | 04-19-2012 |
20120264579 | DEVICE FOR BALANCE EXERCISES AND BALANCE GAMES USING VARIABLE RESTORING FORCES - A board apparatus for balance exercises and balance games (so-called “balance board”), having modifiable restoring forces, is presented. A support part for the user's body is tiltable on a base part around a longitudinal axis and a transverse axis, freely rotatable around a vertical axis, and mounted movably along the vertical axis. A restoring part generates restoring forces that counteract motions of the support part and can be modified by the user. The restoring part includes four elastomer springs that are arranged parallel to the longitudinal axis and to the transverse axis. By replacement, elastomer springs having a different spring force can be used. In addition, the elastomer springs can be offset inward or outward, enabling even more accurate adaptation of the restoring forces. In the context of a twist around the vertical axis, the restoring part always returns the support part into one of two initial positions that are located 180° opposite to one another. The force for this rotational restoration is also adjustable. | 10-18-2012 |
Patent application number | Description | Published |
20100068792 | METHOD FOR THE VOLUME AND BULK REDUCTION OF DOMESTIC WASTE - A method for the volume and bulk reduction of domestic waste is disclosed, comprising comminution of the domestic waste, separation of the organic fraction of the domestic waste, generation of biogas from the separated organic fraction by anaerobic fermentation along the principal of dry fermentation in a biogas plant, relocation of the organic fraction from the biogas plant into an aerobization container, aerobization and composting of the organic fraction by supplying air, and drying of the composted organic fraction by injection of air. | 03-18-2010 |
20100159571 | BIOGAS PLANT FOR METHANIZING BIOMASS HAVING A HIGH SOLIDS FRACTION - A biogas plant for methanizing biomass having a high solids fraction includes a digestion tank system having a plurality of digestion tanks adapted to be closed in a gas- and liquid-tight manner, each of which includes a charging and withdrawing opening for charging with biomass and withdrawing the biomass, a biogas discharge means, a percolate reservoir, a percolate drainage means for discharging percolate from the plurality of digestion tanks and supplying the percolate to the percolate reservoir, a percolate distributing means for distributing the percolate from the percolate reservoir over the biomass in the plurality of digestion tanks, and a percolate regulating means for regulating the percolate level in the plurality of digestion tanks. The percolate reservoir includes a first and a second percolate container, and supplying and discharging of percolate to/from the first and/or the second percolate container takes place with the aid of the percolate regulating means. | 06-24-2010 |
20110236947 | Reducing methane slack when starting and stopping biogas fermenters - A novel method reduces methane slack when operating a biogas fermenter. When starting up a freshly charged fermenter, the methane portion of the produced biogas is initially so low and the portions of carbon dioxide and nitrogen are so high that the biogas cannot be directly used in a combined heat and power plant. Conventionally, the biogas generated during the startup phase has a small portion of methane that is discharged directly into the atmosphere or is flared off if the methane fraction is larger. The initially produced methane is consequently not used and becomes methane slack. To reduce methane slack, the biogas with the low methane fraction is fed to a gas treatment unit in which non-methane components of the gas mixture are partially separated, and the remaining gas mixture with a higher methane content is returned to the biogas fermenter until the methane fraction is sufficiently high. | 09-29-2011 |
20110287527 | Gas treatment appliance and gas treatment process - A gas treatment appliance and a gas treatment process are provided. The proportion of tar is decreased in a product gas formed on the gasification of carbonaceous feedstocks. The product gas or synthesis gas formed on the gasification of carbonaceous feedstocks is generally highly polluted with tar. This tar-polluted gas is exposed to a solid support substrate which is a support for bacteria which degrade tar. Suitable bacteria are, in particular, bacteria that occur in biogas-generating processes. The bacteria contained in the solid support substrate convert at least some of the tars and polycyclic aromatic hydrocarbons (PAHs) contained in the product gas into shorter-chain hydrocarbon compounds and methane which are not an industrial problem, and so their proportion is reduced in the product gas leaving the support substrate. In this manner the tar pollution in a synthesis gas or product gas can be reduced in a simple and inexpensive manner. | 11-24-2011 |
20120159848 | Method of Operating a Reactor Module for Endothermic Reactions and a Reactor Having a Plurality of Such Reactor Modules - A reactor has multiple reactor modules for endothermic reactions. Each reactor module comprises a reaction channel enclosed by a tubular boundary wall and having first and second ends. The reactor module has an inlet element for introducing reactants into the reaction channel. The inlet element is arranged at the first end of the reaction channel. The reactor module has an outlet element for discharging the reaction products from the reaction channel. The outlet element is arranged at the second end of the reaction channel. The reactor module has a heat supply device in the form of a porous burner arrangement that is arranged on the outside of the tubular boundary wall of the reaction channel. Because a porous burner arrangement is used instead of a heat source having catalytic combustion, high reactor performance is achieved at an economical price. The porous burner is substantially less expensive than a combustion catalyst. | 06-28-2012 |
20120329120 | Reducing Methane Slack When Starting and Stopping Biogas Fermenters - A novel method reduces methane slack when operating a biogas fermenter. When starting up a freshly charged fermenter, the methane portion of the produced biogas is initially so low and the portions of carbon dioxide and nitrogen are so high that the biogas cannot be directly used in a combined heat and power plant. Conventionally, the biogas generated during the startup phase has a small portion of methane that is discharged directly into the atmosphere or is flared off if the methane fraction is larger. The initially produced methane is consequently not used and becomes methane slack. To reduce methane slack, the biogas with the low methane fraction is fed to a gas treatment unit in which non-methane components of the gas mixture are partially separated, and the remaining gas mixture with a higher methane content is returned to the biogas fermenter until the methane fraction is sufficiently high. | 12-27-2012 |
20150068259 | Method for Operating a Bioreactor that Methanizes Biomass - The invention relates to a bioreactor for methanizing biomass, a biogas plant having a plurality of such bioreactors, and a method for operating such a bioreactor. Because the elongated reactor vessel includes both a loading gate and an unloading gate that are arranged at opposite ends of the elongated reactor vessel, it is possible to remove consumed biomass, which is harmless in terms of epidemiologic hygiene and plant hygiene due to thermophilic process control during the fermentation, from the reactor vessel through the unloading gate and to transfer this consumed biomass directly to the composting process. The bioreactor thus has a “clean” unloading gate and an “unclean” loading gate. | 03-12-2015 |