{TAIL ~ A waste stream} from {HEAD ~ the liquifier} is recycled to the carbon dioxide PSA unit feed 
{ TAIL ~ A waste stream } from { HEAD ~ the liquifier } is recycled to the carbon dioxide PSA unit feed
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH