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Brandenburgische Technische Universität Cottbus-senftenberg

Jochen Grossmann

Fritz Cotta

Frank Dahlhaus

Andreas Koetz

Martin Ecke

Martin Matschke

Frank Dahlaus

Bernd Danz

Günter Busch

Frank Adam

Marko Burkhardt

Carola Griehl

Marco Lutz

The invention relates to a method for the simultaneous heterotrophic and mixotrophic cultivation of microalgae, to a system for the simultaneous heterotrophic and mixotrophic cultivation of microalgae and to the use of the method and/or the system for the cultivation of microalgae.

Method and system for heterotrophic and mixotrophic cultivation of microalgae

A support structure floating in the open sea and connected to anchors by bracing elements. The support structure has a first component arranged under water and a second component cutting through the surface of the water. Furthermore, the first component has first buoyant bodies arranged at corner points of a polygon and serving as carriers of the second component and second buoyant bodies connecting them with one another and having a tube shape. A nodal structure connecting at least two second buoyant bodies with one another and at least one U-shaped junction plate are arranged in the first buoyant body. The nodal structure is simultaneously the carrier for a tube-shaped support element and is therefore a node of the underwater support structure that absorbs and channels off forces in connection with the junction plate. The second component has the tube-shaped support elements cutting through the surface of the water.

Support structure floating in the open sea and connected to anchors by bracing means, for wind turbines, service stations or converter stations

The invention relates to a method and to a device for feeding gases or gas mixtures into a liquid, suspension, or emulsion in a reactor in a specific manner. According to the invention, gases or gas mixtures are fed into a liquid, suspension, or emulsion in a reactor in a specific manner, wherein the gas or gas mixture is fed in a specific amount and/or at defined points in time in one pulse as a gas bubble into a flowing liquid in a tilted reactor system, whereby a pulsation effect is obtained, wherein a driving force is produced by means of an adiabatic relaxation of the fed-in gas or gas mixture, by means of which driving force wall adhesions on the reactor are prevented.

Method and device for feeding gases or gas mixtures into a liquid, suspension or emulsion in a reactor in a specific manner

The invention relates to a method and a system for obtaining biogas in two or more stages in a hydrolysis and a methane stage, wherein the hydrolysis of solid biogenic materials is performed in at least two percolators operated at offset times. Liquid hydrolyzate and COrich hydrolysis gas, and then hydrolysis gas comprising methane thereby arises in the percolator. The liquid hydrolyzate is removed from the percolators, wherein part of the hydrolyzate is fed into the methane stage and the other part of the hydrolysis stage. In the methane stage, the hydrolyzate is converted to biogas and fermenting fluid. In the method according to the invention, the percolators are operated in a gas tight manner and hydrolysis gas is drawn off from the percolators, wherein the hydrolysis gas comprising methane is fed to an energy utilization and COrich hydrolysis gas is used for purging a further percolator operated at an offset time. The system according to the invention is suitable for performing said method and comprises at least two gas tight percolators that are interconnected by means of the gas supply lines thereof, and at least one methane reactor.

Method and system for the gas-tight process control of percolators in a biogas method having two or more stages

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Dresden, Germany

Jochen Grossmann