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