Abstract

The invention relates to a trace element solution for supplementing nutrients for anaerobic fermentation, in particular a biogas method, comprising at least one trace element and at least two complexing agents. Complexing agents are used which can (1) transport trace elements in complexed form over the cell membrane and (2) release the trace elements into the cell. The complexing agents can optionally be biologically degraded.

IPC Classes  ?

• C02F 1/68 - Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
• C02F 3/28 - Anaerobic digestion processes
• C02F 11/04 - Anaerobic treatmentProduction of methane by such processes

Abstract

The method according to the invention for microbial production of a certain product and methane comprises the following steps: a) generating a certain product from a certain substrate having a certain organism, the producer, in a bioreactor (2, 10), wherein metabolites, such as low-molecular alcohols, aldehydes and acids, hydrogen, and CO2 arise from the production of said product, and can have a suppressing effect on the generation of the product, b) generating methane by means of a methanogen, wherein at least one metabolite is broken down when generating the methane, and thereby removed from the bioreactor (2, 10), and the energy thereof is made usable.

IPC Classes  ?

• C12P 5/02 - Preparation of hydrocarbons acyclic
• C12P 7/16 - Butanols
• C12P 7/18 - Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic polyhydric
• C12P 7/20 - Glycerol
• C12P 7/36 - Acetone-containing products produced from substrate containing grain or cereal material
• C12P 7/46 - Dicarboxylic acids having four or less carbon atoms, e.g. fumaric acid, maleic acid
• C12P 7/56 - Lactic acid

Abstract

The invention relates to an agitator for a fermenter, to a fermenter and to a method for operating a fermenter. The agitator comprises an agitator shaft (12) which is placed according to the invention approximately at a right angle in the fermenter. The substrate present in the fermenter is thus circulated in horizontal planes, thereby allowing to adjust a plurality of layered decomposition levels. The agitator is preferably configured in such a manner that it can be withdrawn from the fermenter towards the top during operation, thereby eliminating the need for evacuating the fermenter for maintenance work on the agitator.

IPC Classes  ?

• C12M 1/107 - Apparatus for enzymology or microbiology with means for collecting fermentation gases, e.g. methane
• C12M 1/02 - Apparatus for enzymology or microbiology with agitation meansApparatus for enzymology or microbiology with heat exchange means
• B01F 7/00 - Mixers with rotary stirring devices in fixed receptacles; Kneaders
• B01F 15/00 - Accessories for mixers