In {HEAD ~ the method} {TAIL ~ the black liquor} is concentrated in a multi effect evaporation plant in order to obtain black liquor at a suitable dry solids content for combustion and to generate vapor 
In { HEAD ~ the method } { TAIL ~ the black liquor } is concentrated in a multi effect evaporation plant in order to obtain black liquor at a suitable dry solids content for combustion and to generate vapor
OTH HEAD HEAD HEAD HEAD HEAD HEAD TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH