Industrial Gas Filtration and Generation Division

Industrial Gas Filtration and Generation Division - Anaerobic Digester

Anaerobic Digester


The Application

Anaerobic digestion involves converting organic materials such as animal waste and food processing waste into what is known as digester gas, or biogas. The waste material is put into an airtight container, called a digester, where temperature, pH levels and the amount of time spent in the container are closely monitored. The waste is then decomposed and broken down into smaller molecules. The decomposed matter is converted to organic acids. 


Finally, the acids are converted to digester gas. The gas can then be used as an energy source for various process components such as engines and turbines, or can be stored for future use.


The Problem

Once the waste material has been placed in the digester, mixed, and converted to gas, the resultant gas will contain impurities generated by and left over from the actual digestion process. This includes water, condensed gas liquids, hydrocarbons, and acid gas that must be removed prior to transport for use or storage. Unfiltered gas will lead to:

  • Cause compressor damage
  • Foul gas scrubbers, valves and other instrumentation equipment


The Solution

The gas coming off of the digester should be filtered prior to entering a gas receiver to eliminate contaminants generated by digestion. Gas leaving treatment should be filtered to remove any liquids carried over from the process. A coalescing filter is also recommended after compression to get rid of any compressor oils that may be transported downstream.

Parker Industrial Gas Filtration and Generation Division 
4087 Walden Avenue
Lancaster, NY 14086

Fax: 877-857-3800