TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The microorganism M. bourgensis is a microorganism of the strain: Methanoculleus sp. dm2; Archaeon clone GZK7; Archaeon clone 5.5ft C121A; Archaeon clone 5.5ft C124A; Archaeon clone 5.5ft C141A; Archaeon clone A52; Archaeon clone MCSArc B6; Euryarchaeota clone BSA1A-03; Euryarchaeota clone BSA2A-02; or Euryarchaeota clone MAA04. The nucleotide sequence contains a sequence region that has more than 98% (preferably more than 99.5%) sequence identity with the nucleotide sequence of SEQ ID NO. 4. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 4. The nucleotide sequence contains a sequence region that has more than 98% (preferably more than 99.5%) sequence identity with the nucleotide sequence of SEQ ID NO. 9. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 9. The nucleotide sequence contains a sequence region that has more than 98.2% (preferably more than 99.5%) sequence identity with the nucleotide sequence of SEQ ID NO. 10. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 10. The nucleotide sequence contains a sequence region that has more than 98% (preferably more than 99.5%) sequence identity with the nucleotide sequence of SEQ ID NO. 11. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 11. The nucleotide sequence contains a sequence region that has more than 97.5% (preferably more than 99.5%) sequence identity with the nucleotide sequence of SEQ ID NO. 12. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 12. The nucleotide sequence contains a sequence region that has more than 99.3% (preferably more than 99.9%) sequence identity with the nucleotide sequence of SEQ ID NO. 28. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 28. The nucleotide sequence contains a sequence region that has more than 96% (preferably more than 99%) sequence identity with the nucleotide sequence of SEQ ID NO. 27. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 27. The nucleotide sequence contains a sequence region that has more than 96% (preferably more than 99%) sequence identity with the nucleotide sequence of SEQ ID NO. 20. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 20. The nucleotide sequence contains a sequence region that has more than 99.65% (preferably more than 99.9%) sequence identity with the nucleotide sequence of SEQ ID NO. 25. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 25. The nucleotide sequence contains a sequence region that has more than 99.3% (preferably more than 99.9%) sequence identity with the nucleotide sequence of SEQ ID NO. 26. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 26. The nucleotide sequence contains a sequence region that has more than 98% (preferably more than 99.5%) sequence identity with the nucleotide sequence of SEQ ID NO. 29. The nucleotide sequence contains a sequence region corresponding to the nucleotide sequence of SEQ ID NO: 29. The microorganisms constitute at least 102% of the total number of microorganisms present in culture. The microorganisms constitute at least 1% (preferably at least 90%) of the total number of microorganisms present in the culture. The culture of microorganisms is a pure culture of a microorganism, or an immobilized culture of microorganisms, where sequences not defined here may be found at ftp://ftp.wipo.int/pub/published_pct_sequences/publication.    TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Method: The M. bourgensis is added in the form of a culture of microorganisms, where the amount of M. bourgensis is at least 10-4% (preferably at least 10-2%) of the total number of microorganisms present in the culture. The M. bourgensis constitutes at least 1% (preferably at least 90%) of the total number of microorganisms present in the culture. A pure culture of the microorganism M. bourgensis is added. The M. bourgensis is added as a component of at least one immobilized culture of microorganisms to the biomass. Additional biomass is added in the fermentation reactor contemporary to the addition of the M. bourgensis. The loading rate in the fermentation reactor is increased continuously by continuous addition of biomass. The production of biogas from biomass is carried out: at a loading rate of greater than or equal to 0.5 kg of organic dry substance/m3d, preferably greater than or equal to 8 kg of organic dry substance/m3d; and at 20-80 degrees C, preferably 40-50 degrees C. The production of biogas from biomass is carried out under constant mixing of the fermentation substrate. The addition of fermentation substrate and the addition of the M. bourgensis takes place continuously. The M. bourgensis is added in an amount to the fermentation substrate, which after adding the proportion of the microorganism constitutes 10-8 to 50% (preferably 10-3 to 1%) of the total number of microorganisms present in the fermentation substrate.