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Title
Verfahren und Vorrichtung zur Behandlung biogener Stoffe zur Erzeugung von Biogas
Date Issued
2008
Author(s)
Fassauer, B.
Friedrich, H.
Maas, R.
Eichstätter, R.
Patent No
102008042461
Abstract
(B3) Die Erfindung bezieht sich auf das Gebiet der Energieerzeugung und betrifft ein Verfahren und eine Vorrichtung, wie sie beispielsweise in einer Biogaserzeugungsanlage eingesetzt werden koennen. Die Aufgabe der vorliegenden Erfindung besteht in der Angabe eines Verfahrens und einer Vorrichtung, mit dem die Biogasausbeute von Biogaserzeugungsanlagen gesteigert wird. Die Aufgabe wird geloest durch ein Verfahren, bei dem der aus einem Fermenter stammende Gaerrest I einer Fest-Fluessig-Trennung unterzogen wird und nachfolgend die Fluessigphase von Gaerrest einem Verfahren zur Vergroesserung der Feststoffoberflaeche und zur Entfernung von geloesten Gasen unterworfen und die entstehenden Produkte entweder dem oder den Fermentern der Biogaserzeugungsanlage und/oder einem weiteren Fermenter zugefuehrt werden. Die Aufgabe wird weiterhin geloest durch eine Vorrichtung, bestehend aus Biogaserzeugungsanlage, mindestens einer Vorrichtung zur Fest-Fluessig-Trennung von Gaerresten einer Biogaserzeugungsanlage und einer Vorrichtung zur Vergroesserung der Feststoffoberflaeche und zur Entfernung von geloesten Gasen.
DE 102008042461 B3 UPAB: 20100408 NOVELTY - The method comprises subjecting a fermentation residue I (3) occurring from a biogas production plant with a fermenter (2) to a solid-liquid-separation, subjecting a liquid phase (6) of the fermentation residue I to a process for enlarging the solid surface and for removing dissolved gases, supplying the resulting product to the fermenter of the biogas production plant and/or to a further fermenter, where a fermentation residue II is resulted in the case of supplying the product to the further fermenter, and feeding the resulting fermentation residue II to a hydrolysis process step. DETAILED DESCRIPTION - The method comprises subjecting a fermentation residue I (3) occurring from a biogas production plant with a fermenter (2) to a solid-liquid-separation, subjecting a liquid phase (6) of the fermentation residue I to a process for enlarging the solid surface and for removing dissolved gases, supplying the resulting product to the fermenter of the biogas production plant and/or to a further fermenter, where a fermentation residue II is resulted in the case of supplying the product to the further fermenter, feeding the resulting fermentation residue II to a hydrolysis process step, the fermenter of the biogas production plant and/or a final disposal site or to a further fermenter, which realizes the process for enlarging the solid surface and for removing dissolved gases next to the fermentation, subjecting the resulting fermentation residue II partially to the process for enlarging the solid surface and for removing dissolved gases, and feeding the process product to the further fermenter, the hydrolysis process step, the fermenter of the biogas production plant and/or the final disposal site. The fermentation residue II is subjected to a mechanical solid-liquid-separation in a screw press, screen belt press, decanter centrifuge, membrane filter press, chamber filter press and oscillating sieve (4). A separation grade of 30 mu m to 3 mm is realized with the oscillating sieve. The liquid phase is subjected to a mechanical crushing and/or an ultrasound treatment. The mechanical crushing is carried out by a rotor-stator-system e.g. shear gap homogenizer. A peripheral speed of the rotor of 10-50 m/s is realized with the rotor-stator-system. The ultrasound treatment is carried out with a frequency of 16-1000 kHz. The products of the process steps for enlarging the solid surface and for removing dissolved gases are fed to a further fermenter that is separated from the biogas production plant. The products in the separated fermenter are subjected to a biological degradation under anaerobic conditions within 6 hours to 5 days in the fermenter, and then the products are supplied to the hydrolysis process step of the biogas production plant. The viscous material (5) from the solid-liquid separation is fed to the final disposal site. The flow speeds of the liquid phases are realized to 0.005-2 m/s. An INDEPENDENT CLAIM is included for a device for continuously treating biogenic materials for producing biogas. USE - Method for continuously treating biogenic materials for producing biogas, where the biogenic materials are renewable raw material, sewage sludge, agricultural wastewater, disposal wastewater, wastewater from waste treatment plants, biogenic residual or waste products from food industry and/or agriculture (claimed). ADVANTAGE - The method ensures economical and efficient production of the biogas with high yield and high quality by increasing proportion of methane and reducing carbon dioxide and harmful hydrogen sulfide, and improves the efficiency of the fermentation process.
Language
de
Patenprio
DE 102008042461 A: 20080929