The bioreactor contains {HEAD ~ methanotrophic microorganisms} which convert the organic contaminants into {TAIL ~ mainly carbon dioxide} 
The bioreactor contains { HEAD ~ methanotrophic microorganisms } which convert the organic contaminants into { TAIL ~ mainly carbon dioxide }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL