The results of the investigation have been published in an internal report.

The studies were carried out in a batch digestion process and a continuous process – the latter at a mesophilic temperature (39oC) and an average retention time of 32 days. The batch digestion showed that the by-products are very easy degradable and produce a high methane yield. The continuous digestion took place over a period of five months and gave a lower average methane yield. This was apparently because the digestive process was inhibited mainly by ammonia.

The report ‘ Anaerobic digestions of by-products from production of ethanol’ , Internal Report, DJF Plant Science No. 14, February 2008, can be downloaded as a pdf-file or purchased through Else Høgh, telephone +45 8999 1028.