Microbial Analysis for Biogas Plants

Mikrobielle Analytik für Biogasanlagen

In order to control biogas plants usually physico-chemical analysis is performed. But the chemical processes in a biogas fermenter are performed by a variety of different microorganisms.

In a research project (FNR: 22005812) we were able to demonstrate that fermenters of biogas plants may be classified according to the composition of methanogenic bacteria (archaea). This classification of biogas fermenters can be correlated with physico-chemical parameters, but goes way beyond.

The better the knowledge of the microbial composition in a fermenter of a biogas plant, the better the control over the process. Especially in the case of a disturbed methane production it is important to know where exactly the fermentation process is inhibited. Otherwise precious time is wasted with measures "at the off chance" of hitting the root cause.

Besides the methanogenic archaea AMODIAs detailed analysis comprises also the so called syntrophic bacteria. This allows to detect possible bottlenecks in the methane production.