The lines are coupled by pipelines, each having a valve, installed after the solid liquid separation step for sending a liquid from the solid liquid separation step to the neutralization step in each line and after the sulfurization step for sending a liquid from the sulfurization step to {HEAD ~ the detoxification step} in {TAIL ~ each line} 
in
The lines are coupled by pipelines , each having a valve , installed after the solid liquid separation step for sending a liquid from the solid liquid separation step to the neutralization step in each line and after the sulfurization step for sending a liquid from the sulfurization step to { HEAD ~ the detoxification step } in { TAIL ~ each line }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL