The method 1, wherein {HEAD ~ the splitting} up includes splitting up {TAIL ~ the remaining fraction} high in plastics into the light fraction and the heavy fraction by air sifting 
The method 1 , wherein { HEAD ~ the splitting } up includes splitting up { TAIL ~ the remaining fraction } high in plastics into the light fraction and the heavy fraction by air sifting
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH