Biomass Dry Fermentation Advantages

Producing Green Energy from Biomass has a number of advantages over other forms of energy production:

  • Biomass can be stored, and with it you store the energy the biomass contains.
  • Biomass recycling does not have the environmentally negative impacts that can accompany other forms of energy production.
  • Biomass is an abundant, renewable resource that is available local to agricultural production.
  • Biomass uses material that will otherwise be wasted and can be difficult and costly to dispose of.

The Dry Fermentation method of biogas production has a number of distinct advantages over the traditional liquid fermentation method:


Batch processing
As the dry fermentation process uses a series of fermentation digesters, if, for any reason, a batch goes wrong only the biomass in the affected digester would need to be replaced.

Multiple Fermenters
The Dry Fermentation plant consists of a number of separate fermenter chambers or digesters.  This means there is no single point-of-failure as is usual in liquid fermentation.

Less piping
A Dry Fermentation plant uses piping to extract the biogas and to cycle the percolate unlike a liquid fermentation which has a lot of piping to move the biomass during the production cycle.

Less mass
As the Dry Fermentation process does not rely on liquefied material, the overall mass that must be managed, moved, cleaned and disposed of is much smaller than that used by the liquid method.  This is a clear operating advantage. It also meaning less building space and infrastructure is required for the plant.

Ease of cleaning
When replacing a batch of biomass in a digester it is a simple operation to clean the interior of the fermentation vat. Cleaning a liquid fermentation plant requires total shut down.

Ease of Disposal
The post-process material from a Dry Fermentation plant can be used for composting and similar applications.  No sewage need be pumped out.  This is makes winter much easier than it would be using the liquid fermentation method.

Less manual work
The discrete batch processing of solid biomass requires moving materials about once every four weeks per fermentation chamber.  The biogas production process is controlled, monitored and supervised by an auto-pilot software system.

Reduced operating costs
The small amount of manual labour, piping and maintenance required in a Dry Fermentation plant lead to a much lower operating cost.

Reduced water consumption
Since the necessary humidification is achieved by percolate circulation and the biomass is not required to be liquefied for biogas production there is substantially less water used by the Dry Fermentation method.

Lower risk of plant downtime
The decentralized plant layout and discrete batch processing of biomass mean that the risk of total plant downtime is inherently reduced by the Dry Fermentation process.

Less issues during project authorization process
The liquid fermentation is usually associated with issues like “smell” and tall storage buildings. Dry Fermentation plants do not imply these issues, thus the authorization process is found to be easier.

Easier agricultural handling
Liquid fermentation requires regular disposal of sewage, usually taken out to fields as fertilizer. This, however, is not possible in winter times, creating additional burdens of storage and handling. Dry Fermentation does not process such sewage, the resulting solid biomass can be stored easily any time, or reused (and sold) for composting purposes.