After this combined treatment, {TAIL ~ the solid phase} is separated from {HEAD ~ the aqueous phase} and recovered 
After this combined treatment , { TAIL ~ the solid phase } is separated from { HEAD ~ the aqueous phase } and recovered
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH