Coagulant addition in {TAIL ~ the underwash feed water} reduces {HEAD ~ the solids content} reporting to the primary bitumen froth in a primary separation vessel  
Coagulant addition in { TAIL ~ the underwash feed water } reduces { HEAD ~ the solids content } reporting to the primary bitumen froth in a primary separation vessel
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH