The treatment in accordance with {HEAD ~ the system} starts with biologic and enzymatic treatment of {TAIL ~ the materials} in the waste water stream 
The treatment in accordance with { HEAD ~ the system } starts with biologic and enzymatic treatment of { TAIL ~ the materials } in the waste water stream
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH